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" >&6; } if ${ac_cv_prog_ac_ct_DUMPBIN+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_DUMPBIN"; then ac_cv_prog_ac_ct_DUMPBIN="$ac_ct_DUMPBIN" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_DUMPBIN="$ac_prog" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_DUMPBIN=$ac_cv_prog_ac_ct_DUMPBIN if test -n "$ac_ct_DUMPBIN"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DUMPBIN" >&5 $as_echo "$ac_ct_DUMPBIN" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi test -n "$ac_ct_DUMPBIN" && break done if test "x$ac_ct_DUMPBIN" = x; then DUMPBIN=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac DUMPBIN=$ac_ct_DUMPBIN fi fi case `$DUMPBIN -symbols -headers /dev/null 2>&1 | sed '1q'` in *COFF*) DUMPBIN="$DUMPBIN -symbols -headers" ;; *) DUMPBIN=: ;; esac fi if test : != "$DUMPBIN"; then NM=$DUMPBIN fi fi test -z "$NM" && NM=nm { $as_echo "$as_me:${as_lineno-$LINENO}: checking the name lister ($NM) interface" >&5 $as_echo_n "checking the name lister ($NM) interface... " >&6; } if ${lt_cv_nm_interface+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_nm_interface="BSD nm" echo "int some_variable = 0;" > conftest.$ac_ext (eval echo "\"\$as_me:$LINENO: $ac_compile\"" >&5) (eval "$ac_compile" 2>conftest.err) cat conftest.err >&5 (eval echo "\"\$as_me:$LINENO: $NM \\\"conftest.$ac_objext\\\"\"" >&5) (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out) cat conftest.err >&5 (eval echo "\"\$as_me:$LINENO: output\"" >&5) cat conftest.out >&5 if $GREP 'External.*some_variable' conftest.out > /dev/null; then lt_cv_nm_interface="MS dumpbin" fi rm -f conftest* fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_nm_interface" >&5 $as_echo "$lt_cv_nm_interface" >&6; } { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ln -s works" >&5 $as_echo_n "checking whether ln -s works... " >&6; } LN_S=$as_ln_s if test "$LN_S" = "ln -s"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5 $as_echo "yes" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no, using $LN_S" >&5 $as_echo "no, using $LN_S" >&6; } fi # find the maximum length of command line arguments { $as_echo "$as_me:${as_lineno-$LINENO}: checking the maximum length of command line arguments" >&5 $as_echo_n "checking the maximum length of command line arguments... " >&6; } if ${lt_cv_sys_max_cmd_len+:} false; then : $as_echo_n "(cached) " >&6 else i=0 teststring=ABCD case $build_os in msdosdjgpp*) # On DJGPP, this test can blow up pretty badly due to problems in libc # (any single argument exceeding 2000 bytes causes a buffer overrun # during glob expansion). Even if it were fixed, the result of this # check would be larger than it should be. lt_cv_sys_max_cmd_len=12288; # 12K is about right ;; gnu*) # Under GNU Hurd, this test is not required because there is # no limit to the length of command line arguments. # Libtool will interpret -1 as no limit whatsoever lt_cv_sys_max_cmd_len=-1; ;; cygwin* | mingw* | cegcc*) # On Win9x/ME, this test blows up -- it succeeds, but takes # about 5 minutes as the teststring grows exponentially. # Worse, since 9x/ME are not pre-emptively multitasking, # you end up with a "frozen" computer, even though with patience # the test eventually succeeds (with a max line length of 256k). # Instead, let's just punt: use the minimum linelength reported by # all of the supported platforms: 8192 (on NT/2K/XP). lt_cv_sys_max_cmd_len=8192; ;; mint*) # On MiNT this can take a long time and run out of memory. lt_cv_sys_max_cmd_len=8192; ;; amigaos*) # On AmigaOS with pdksh, this test takes hours, literally. # So we just punt and use a minimum line length of 8192. lt_cv_sys_max_cmd_len=8192; ;; bitrig* | darwin* | dragonfly* | freebsd* | netbsd* | openbsd*) # This has been around since 386BSD, at least. Likely further. if test -x /sbin/sysctl; then lt_cv_sys_max_cmd_len=`/sbin/sysctl -n kern.argmax` elif test -x /usr/sbin/sysctl; then lt_cv_sys_max_cmd_len=`/usr/sbin/sysctl -n kern.argmax` else lt_cv_sys_max_cmd_len=65536 # usable default for all BSDs fi # And add a safety zone lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4` lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3` ;; interix*) # We know the value 262144 and hardcode it with a safety zone (like BSD) lt_cv_sys_max_cmd_len=196608 ;; os2*) # The test takes a long time on OS/2. lt_cv_sys_max_cmd_len=8192 ;; osf*) # Dr. Hans Ekkehard Plesser reports seeing a kernel panic running configure # due to this test when exec_disable_arg_limit is 1 on Tru64. It is not # nice to cause kernel panics so lets avoid the loop below. # First set a reasonable default. lt_cv_sys_max_cmd_len=16384 # if test -x /sbin/sysconfig; then case `/sbin/sysconfig -q proc exec_disable_arg_limit` in *1*) lt_cv_sys_max_cmd_len=-1 ;; esac fi ;; sco3.2v5*) lt_cv_sys_max_cmd_len=102400 ;; sysv5* | sco5v6* | sysv4.2uw2*) kargmax=`grep ARG_MAX /etc/conf/cf.d/stune 2>/dev/null` if test -n "$kargmax"; then lt_cv_sys_max_cmd_len=`echo $kargmax | sed 's/.*[ ]//'` else lt_cv_sys_max_cmd_len=32768 fi ;; *) lt_cv_sys_max_cmd_len=`(getconf ARG_MAX) 2> /dev/null` if test -n "$lt_cv_sys_max_cmd_len" && \ test undefined != "$lt_cv_sys_max_cmd_len"; then lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4` lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3` else # Make teststring a little bigger before we do anything with it. # a 1K string should be a reasonable start. for i in 1 2 3 4 5 6 7 8; do teststring=$teststring$teststring done SHELL=${SHELL-${CONFIG_SHELL-/bin/sh}} # If test is not a shell built-in, we'll probably end up computing a # maximum length that is only half of the actual maximum length, but # we can't tell. while { test X`env echo "$teststring$teststring" 2>/dev/null` \ = "X$teststring$teststring"; } >/dev/null 2>&1 && test 17 != "$i" # 1/2 MB should be enough do i=`expr $i + 1` teststring=$teststring$teststring done # Only check the string length outside the loop. lt_cv_sys_max_cmd_len=`expr "X$teststring" : ".*" 2>&1` teststring= # Add a significant safety factor because C++ compilers can tack on # massive amounts of additional arguments before passing them to the # linker. It appears as though 1/2 is a usable value. lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 2` fi ;; esac fi if test -n "$lt_cv_sys_max_cmd_len"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sys_max_cmd_len" >&5 $as_echo "$lt_cv_sys_max_cmd_len" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: none" >&5 $as_echo "none" >&6; } fi max_cmd_len=$lt_cv_sys_max_cmd_len : ${CP="cp -f"} : ${MV="mv -f"} : ${RM="rm -f"} if ( (MAIL=60; unset MAIL) || exit) >/dev/null 2>&1; then lt_unset=unset else lt_unset=false fi # test EBCDIC or ASCII case `echo X|tr X '\101'` in A) # ASCII based system # \n is not interpreted correctly by Solaris 8 /usr/ucb/tr lt_SP2NL='tr \040 \012' lt_NL2SP='tr \015\012 \040\040' ;; *) # EBCDIC based system lt_SP2NL='tr \100 \n' lt_NL2SP='tr \r\n \100\100' ;; esac { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to convert $build file names to $host format" >&5 $as_echo_n "checking how to convert $build file names to $host format... " >&6; } if ${lt_cv_to_host_file_cmd+:} false; then : $as_echo_n "(cached) " >&6 else case $host in *-*-mingw* ) case $build in *-*-mingw* ) # actually msys lt_cv_to_host_file_cmd=func_convert_file_msys_to_w32 ;; *-*-cygwin* ) lt_cv_to_host_file_cmd=func_convert_file_cygwin_to_w32 ;; * ) # otherwise, assume *nix lt_cv_to_host_file_cmd=func_convert_file_nix_to_w32 ;; esac ;; *-*-cygwin* ) case $build in *-*-mingw* ) # actually msys lt_cv_to_host_file_cmd=func_convert_file_msys_to_cygwin ;; *-*-cygwin* ) lt_cv_to_host_file_cmd=func_convert_file_noop ;; * ) # otherwise, assume *nix lt_cv_to_host_file_cmd=func_convert_file_nix_to_cygwin ;; esac ;; * ) # unhandled hosts (and "normal" native builds) lt_cv_to_host_file_cmd=func_convert_file_noop ;; esac fi to_host_file_cmd=$lt_cv_to_host_file_cmd { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_to_host_file_cmd" >&5 $as_echo "$lt_cv_to_host_file_cmd" >&6; } { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to convert $build file names to toolchain format" >&5 $as_echo_n "checking how to convert $build file names to toolchain format... " >&6; } if ${lt_cv_to_tool_file_cmd+:} false; then : $as_echo_n "(cached) " >&6 else #assume ordinary cross tools, or native build. lt_cv_to_tool_file_cmd=func_convert_file_noop case $host in *-*-mingw* ) case $build in *-*-mingw* ) # actually msys lt_cv_to_tool_file_cmd=func_convert_file_msys_to_w32 ;; esac ;; esac fi to_tool_file_cmd=$lt_cv_to_tool_file_cmd { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_to_tool_file_cmd" >&5 $as_echo "$lt_cv_to_tool_file_cmd" >&6; } { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $LD option to reload object files" >&5 $as_echo_n "checking for $LD option to reload object files... " >&6; } if ${lt_cv_ld_reload_flag+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_ld_reload_flag='-r' fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_reload_flag" >&5 $as_echo "$lt_cv_ld_reload_flag" >&6; } reload_flag=$lt_cv_ld_reload_flag case $reload_flag in "" | " "*) ;; *) reload_flag=" $reload_flag" ;; esac reload_cmds='$LD$reload_flag -o $output$reload_objs' case $host_os in cygwin* | mingw* | pw32* | cegcc*) if test yes != "$GCC"; then reload_cmds=false fi ;; darwin*) if test yes = "$GCC"; then reload_cmds='$LTCC $LTCFLAGS -nostdlib $wl-r -o $output$reload_objs' else reload_cmds='$LD$reload_flag -o $output$reload_objs' fi ;; esac if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}objdump", so it can be a program name with args. set dummy ${ac_tool_prefix}objdump; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_OBJDUMP+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$OBJDUMP"; then ac_cv_prog_OBJDUMP="$OBJDUMP" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_OBJDUMP="${ac_tool_prefix}objdump" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi OBJDUMP=$ac_cv_prog_OBJDUMP if test -n "$OBJDUMP"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5 $as_echo "$OBJDUMP" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_OBJDUMP"; then ac_ct_OBJDUMP=$OBJDUMP # Extract the first word of "objdump", so it can be a program name with args. set dummy objdump; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_OBJDUMP+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_OBJDUMP"; then ac_cv_prog_ac_ct_OBJDUMP="$ac_ct_OBJDUMP" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_OBJDUMP="objdump" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_OBJDUMP=$ac_cv_prog_ac_ct_OBJDUMP if test -n "$ac_ct_OBJDUMP"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJDUMP" >&5 $as_echo "$ac_ct_OBJDUMP" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_OBJDUMP" = x; then OBJDUMP="false" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac OBJDUMP=$ac_ct_OBJDUMP fi else OBJDUMP="$ac_cv_prog_OBJDUMP" fi test -z "$OBJDUMP" && OBJDUMP=objdump { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to recognize dependent libraries" >&5 $as_echo_n "checking how to recognize dependent libraries... " >&6; } if ${lt_cv_deplibs_check_method+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_file_magic_cmd='$MAGIC_CMD' lt_cv_file_magic_test_file= lt_cv_deplibs_check_method='unknown' # Need to set the preceding variable on all platforms that support # interlibrary dependencies. # 'none' -- dependencies not supported. # 'unknown' -- same as none, but documents that we really don't know. # 'pass_all' -- all dependencies passed with no checks. # 'test_compile' -- check by making test program. # 'file_magic [[regex]]' -- check by looking for files in library path # that responds to the $file_magic_cmd with a given extended regex. # If you have 'file' or equivalent on your system and you're not sure # whether 'pass_all' will *always* work, you probably want this one. case $host_os in aix[4-9]*) lt_cv_deplibs_check_method=pass_all ;; beos*) lt_cv_deplibs_check_method=pass_all ;; bsdi[45]*) lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (shared object|dynamic lib)' lt_cv_file_magic_cmd='/usr/bin/file -L' lt_cv_file_magic_test_file=/shlib/libc.so ;; cygwin*) # func_win32_libid is a shell function defined in ltmain.sh lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL' lt_cv_file_magic_cmd='func_win32_libid' ;; mingw* | pw32*) # Base MSYS/MinGW do not provide the 'file' command needed by # func_win32_libid shell function, so use a weaker test based on 'objdump', # unless we find 'file', for example because we are cross-compiling. if ( file / ) >/dev/null 2>&1; then lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL' lt_cv_file_magic_cmd='func_win32_libid' else # Keep this pattern in sync with the one in func_win32_libid. lt_cv_deplibs_check_method='file_magic file format (pei*-i386(.*architecture: i386)?|pe-arm-wince|pe-x86-64)' lt_cv_file_magic_cmd='$OBJDUMP -f' fi ;; cegcc*) # use the weaker test based on 'objdump'. See mingw*. lt_cv_deplibs_check_method='file_magic file format pe-arm-.*little(.*architecture: arm)?' lt_cv_file_magic_cmd='$OBJDUMP -f' ;; darwin* | rhapsody*) lt_cv_deplibs_check_method=pass_all ;; freebsd* | dragonfly*) if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then case $host_cpu in i*86 ) # Not sure whether the presence of OpenBSD here was a mistake. # Let's accept both of them until this is cleared up. lt_cv_deplibs_check_method='file_magic (FreeBSD|OpenBSD|DragonFly)/i[3-9]86 (compact )?demand paged shared library' lt_cv_file_magic_cmd=/usr/bin/file lt_cv_file_magic_test_file=`echo /usr/lib/libc.so.*` ;; esac else lt_cv_deplibs_check_method=pass_all fi ;; haiku*) lt_cv_deplibs_check_method=pass_all ;; hpux10.20* | hpux11*) lt_cv_file_magic_cmd=/usr/bin/file case $host_cpu in ia64*) lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|ELF-[0-9][0-9]) shared object file - IA64' lt_cv_file_magic_test_file=/usr/lib/hpux32/libc.so ;; hppa*64*) lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|ELF[ -][0-9][0-9])(-bit)?( [LM]SB)? shared object( file)?[, -]* PA-RISC [0-9]\.[0-9]' lt_cv_file_magic_test_file=/usr/lib/pa20_64/libc.sl ;; *) lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|PA-RISC[0-9]\.[0-9]) shared library' lt_cv_file_magic_test_file=/usr/lib/libc.sl ;; esac ;; interix[3-9]*) # PIC code is broken on Interix 3.x, that's why |\.a not |_pic\.a here lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so|\.a)$' ;; irix5* | irix6* | nonstopux*) case $LD in *-32|*"-32 ") libmagic=32-bit;; *-n32|*"-n32 ") libmagic=N32;; *-64|*"-64 ") libmagic=64-bit;; *) libmagic=never-match;; esac lt_cv_deplibs_check_method=pass_all ;; # This must be glibc/ELF. linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*) lt_cv_deplibs_check_method=pass_all ;; netbsd* | netbsdelf*-gnu) if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so\.[0-9]+\.[0-9]+|_pic\.a)$' else lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so|_pic\.a)$' fi ;; newos6*) lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (executable|dynamic lib)' lt_cv_file_magic_cmd=/usr/bin/file lt_cv_file_magic_test_file=/usr/lib/libnls.so ;; *nto* | *qnx*) lt_cv_deplibs_check_method=pass_all ;; openbsd* | bitrig*) if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`"; then lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so\.[0-9]+\.[0-9]+|\.so|_pic\.a)$' else lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so\.[0-9]+\.[0-9]+|_pic\.a)$' fi ;; osf3* | osf4* | osf5*) lt_cv_deplibs_check_method=pass_all ;; rdos*) lt_cv_deplibs_check_method=pass_all ;; solaris*) lt_cv_deplibs_check_method=pass_all ;; sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*) lt_cv_deplibs_check_method=pass_all ;; sysv4 | sysv4.3*) case $host_vendor in motorola) lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (shared object|dynamic lib) M[0-9][0-9]* Version [0-9]' lt_cv_file_magic_test_file=`echo /usr/lib/libc.so*` ;; ncr) lt_cv_deplibs_check_method=pass_all ;; sequent) lt_cv_file_magic_cmd='/bin/file' lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [LM]SB (shared object|dynamic lib )' ;; sni) lt_cv_file_magic_cmd='/bin/file' lt_cv_deplibs_check_method="file_magic ELF [0-9][0-9]*-bit [LM]SB dynamic lib" lt_cv_file_magic_test_file=/lib/libc.so ;; siemens) lt_cv_deplibs_check_method=pass_all ;; pc) lt_cv_deplibs_check_method=pass_all ;; esac ;; tpf*) lt_cv_deplibs_check_method=pass_all ;; os2*) lt_cv_deplibs_check_method=pass_all ;; esac fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_deplibs_check_method" >&5 $as_echo "$lt_cv_deplibs_check_method" >&6; } file_magic_glob= want_nocaseglob=no if test "$build" = "$host"; then case $host_os in mingw* | pw32*) if ( shopt | grep nocaseglob ) >/dev/null 2>&1; then want_nocaseglob=yes else file_magic_glob=`echo aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ | $SED -e "s/\(..\)/s\/[\1]\/[\1]\/g;/g"` fi ;; esac fi file_magic_cmd=$lt_cv_file_magic_cmd deplibs_check_method=$lt_cv_deplibs_check_method test -z "$deplibs_check_method" && deplibs_check_method=unknown if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}dlltool", so it can be a program name with args. set dummy ${ac_tool_prefix}dlltool; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_DLLTOOL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$DLLTOOL"; then ac_cv_prog_DLLTOOL="$DLLTOOL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_DLLTOOL="${ac_tool_prefix}dlltool" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi DLLTOOL=$ac_cv_prog_DLLTOOL if test -n "$DLLTOOL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DLLTOOL" >&5 $as_echo "$DLLTOOL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_DLLTOOL"; then ac_ct_DLLTOOL=$DLLTOOL # Extract the first word of "dlltool", so it can be a program name with args. set dummy dlltool; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_DLLTOOL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_DLLTOOL"; then ac_cv_prog_ac_ct_DLLTOOL="$ac_ct_DLLTOOL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_DLLTOOL="dlltool" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_DLLTOOL=$ac_cv_prog_ac_ct_DLLTOOL if test -n "$ac_ct_DLLTOOL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DLLTOOL" >&5 $as_echo "$ac_ct_DLLTOOL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_DLLTOOL" = x; then DLLTOOL="false" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac DLLTOOL=$ac_ct_DLLTOOL fi else DLLTOOL="$ac_cv_prog_DLLTOOL" fi test -z "$DLLTOOL" && DLLTOOL=dlltool { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to associate runtime and link libraries" >&5 $as_echo_n "checking how to associate runtime and link libraries... " >&6; } if ${lt_cv_sharedlib_from_linklib_cmd+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_sharedlib_from_linklib_cmd='unknown' case $host_os in cygwin* | mingw* | pw32* | cegcc*) # two different shell functions defined in ltmain.sh; # decide which one to use based on capabilities of $DLLTOOL case `$DLLTOOL --help 2>&1` in *--identify-strict*) lt_cv_sharedlib_from_linklib_cmd=func_cygming_dll_for_implib ;; *) lt_cv_sharedlib_from_linklib_cmd=func_cygming_dll_for_implib_fallback ;; esac ;; *) # fallback: assume linklib IS sharedlib lt_cv_sharedlib_from_linklib_cmd=$ECHO ;; esac fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sharedlib_from_linklib_cmd" >&5 $as_echo "$lt_cv_sharedlib_from_linklib_cmd" >&6; } sharedlib_from_linklib_cmd=$lt_cv_sharedlib_from_linklib_cmd test -z "$sharedlib_from_linklib_cmd" && sharedlib_from_linklib_cmd=$ECHO if test -n "$ac_tool_prefix"; then for ac_prog in ar do # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args. set dummy $ac_tool_prefix$ac_prog; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_AR+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$AR"; then ac_cv_prog_AR="$AR" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_AR="$ac_tool_prefix$ac_prog" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi AR=$ac_cv_prog_AR if test -n "$AR"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AR" >&5 $as_echo "$AR" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi test -n "$AR" && break done fi if test -z "$AR"; then ac_ct_AR=$AR for ac_prog in ar do # Extract the first word of "$ac_prog", so it can be a program name with args. set dummy $ac_prog; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_AR+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_AR"; then ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_AR="$ac_prog" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_AR=$ac_cv_prog_ac_ct_AR if test -n "$ac_ct_AR"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5 $as_echo "$ac_ct_AR" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi test -n "$ac_ct_AR" && break done if test "x$ac_ct_AR" = x; then AR="false" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac AR=$ac_ct_AR fi fi : ${AR=ar} : ${AR_FLAGS=cru} { $as_echo "$as_me:${as_lineno-$LINENO}: checking for archiver @FILE support" >&5 $as_echo_n "checking for archiver @FILE support... " >&6; } if ${lt_cv_ar_at_file+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_ar_at_file=no cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ int main () { ; return 0; } _ACEOF if ac_fn_c_try_compile "$LINENO"; then : echo conftest.$ac_objext > conftest.lst lt_ar_try='$AR $AR_FLAGS libconftest.a @conftest.lst >&5' { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$lt_ar_try\""; } >&5 (eval $lt_ar_try) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; } if test 0 -eq "$ac_status"; then # Ensure the archiver fails upon bogus file names. rm -f conftest.$ac_objext libconftest.a { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$lt_ar_try\""; } >&5 (eval $lt_ar_try) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; } if test 0 -ne "$ac_status"; then lt_cv_ar_at_file=@ fi fi rm -f conftest.* libconftest.a fi rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ar_at_file" >&5 $as_echo "$lt_cv_ar_at_file" >&6; } if test no = "$lt_cv_ar_at_file"; then archiver_list_spec= else archiver_list_spec=$lt_cv_ar_at_file fi if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args. set dummy ${ac_tool_prefix}strip; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_STRIP+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$STRIP"; then ac_cv_prog_STRIP="$STRIP" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_STRIP="${ac_tool_prefix}strip" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi STRIP=$ac_cv_prog_STRIP if test -n "$STRIP"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5 $as_echo "$STRIP" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_STRIP"; then ac_ct_STRIP=$STRIP # Extract the first word of "strip", so it can be a program name with args. set dummy strip; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_STRIP+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_STRIP"; then ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_STRIP="strip" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP if test -n "$ac_ct_STRIP"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5 $as_echo "$ac_ct_STRIP" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_STRIP" = x; then STRIP=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac STRIP=$ac_ct_STRIP fi else STRIP="$ac_cv_prog_STRIP" fi test -z "$STRIP" && STRIP=: if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args. set dummy ${ac_tool_prefix}ranlib; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_RANLIB+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$RANLIB"; then ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_RANLIB="${ac_tool_prefix}ranlib" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi RANLIB=$ac_cv_prog_RANLIB if test -n "$RANLIB"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $RANLIB" >&5 $as_echo "$RANLIB" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_RANLIB"; then ac_ct_RANLIB=$RANLIB # Extract the first word of "ranlib", so it can be a program name with args. set dummy ranlib; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_RANLIB+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_RANLIB"; then ac_cv_prog_ac_ct_RANLIB="$ac_ct_RANLIB" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_RANLIB="ranlib" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB if test -n "$ac_ct_RANLIB"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_RANLIB" >&5 $as_echo "$ac_ct_RANLIB" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_RANLIB" = x; then RANLIB=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac RANLIB=$ac_ct_RANLIB fi else RANLIB="$ac_cv_prog_RANLIB" fi test -z "$RANLIB" && RANLIB=: # Determine commands to create old-style static archives. old_archive_cmds='$AR $AR_FLAGS $oldlib$oldobjs' old_postinstall_cmds='chmod 644 $oldlib' old_postuninstall_cmds= if test -n "$RANLIB"; then case $host_os in bitrig* | openbsd*) old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB -t \$tool_oldlib" ;; *) old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB \$tool_oldlib" ;; esac old_archive_cmds="$old_archive_cmds~\$RANLIB \$tool_oldlib" fi case $host_os in darwin*) lock_old_archive_extraction=yes ;; *) lock_old_archive_extraction=no ;; esac # If no C compiler was specified, use CC. LTCC=${LTCC-"$CC"} # If no C compiler flags were specified, use CFLAGS. LTCFLAGS=${LTCFLAGS-"$CFLAGS"} # Allow CC to be a program name with arguments. compiler=$CC # Check for command to grab the raw symbol name followed by C symbol from nm. { $as_echo "$as_me:${as_lineno-$LINENO}: checking command to parse $NM output from $compiler object" >&5 $as_echo_n "checking command to parse $NM output from $compiler object... " >&6; } if ${lt_cv_sys_global_symbol_pipe+:} false; then : $as_echo_n "(cached) " >&6 else # These are sane defaults that work on at least a few old systems. # [They come from Ultrix. What could be older than Ultrix?!! ;)] # Character class describing NM global symbol codes. symcode='[BCDEGRST]' # Regexp to match symbols that can be accessed directly from C. sympat='\([_A-Za-z][_A-Za-z0-9]*\)' # Define system-specific variables. case $host_os in aix*) symcode='[BCDT]' ;; cygwin* | mingw* | pw32* | cegcc*) symcode='[ABCDGISTW]' ;; hpux*) if test ia64 = "$host_cpu"; then symcode='[ABCDEGRST]' fi ;; irix* | nonstopux*) symcode='[BCDEGRST]' ;; osf*) symcode='[BCDEGQRST]' ;; solaris*) symcode='[BDRT]' ;; sco3.2v5*) symcode='[DT]' ;; sysv4.2uw2*) symcode='[DT]' ;; sysv5* | sco5v6* | unixware* | OpenUNIX*) symcode='[ABDT]' ;; sysv4) symcode='[DFNSTU]' ;; esac # If we're using GNU nm, then use its standard symbol codes. case `$NM -V 2>&1` in *GNU* | *'with BFD'*) symcode='[ABCDGIRSTW]' ;; esac if test "$lt_cv_nm_interface" = "MS dumpbin"; then # Gets list of data symbols to import. lt_cv_sys_global_symbol_to_import="sed -n -e 's/^I .* \(.*\)$/\1/p'" # Adjust the below global symbol transforms to fixup imported variables. lt_cdecl_hook=" -e 's/^I .* \(.*\)$/extern __declspec(dllimport) char \1;/p'" lt_c_name_hook=" -e 's/^I .* \(.*\)$/ {\"\1\", (void *) 0},/p'" lt_c_name_lib_hook="\ -e 's/^I .* \(lib.*\)$/ {\"\1\", (void *) 0},/p'\ -e 's/^I .* \(.*\)$/ {\"lib\1\", (void *) 0},/p'" else # Disable hooks by default. lt_cv_sys_global_symbol_to_import= lt_cdecl_hook= lt_c_name_hook= lt_c_name_lib_hook= fi # Transform an extracted symbol line into a proper C declaration. # Some systems (esp. on ia64) link data and code symbols differently, # so use this general approach. lt_cv_sys_global_symbol_to_cdecl="sed -n"\ $lt_cdecl_hook\ " -e 's/^T .* \(.*\)$/extern int \1();/p'"\ " -e 's/^$symcode$symcode* .* \(.*\)$/extern char \1;/p'" # Transform an extracted symbol line into symbol name and symbol address lt_cv_sys_global_symbol_to_c_name_address="sed -n"\ $lt_c_name_hook\ " -e 's/^: \(.*\) .*$/ {\"\1\", (void *) 0},/p'"\ " -e 's/^$symcode$symcode* .* \(.*\)$/ {\"\1\", (void *) \&\1},/p'" # Transform an extracted symbol line into symbol name with lib prefix and # symbol address. lt_cv_sys_global_symbol_to_c_name_address_lib_prefix="sed -n"\ $lt_c_name_lib_hook\ " -e 's/^: \(.*\) .*$/ {\"\1\", (void *) 0},/p'"\ " -e 's/^$symcode$symcode* .* \(lib.*\)$/ {\"\1\", (void *) \&\1},/p'"\ " -e 's/^$symcode$symcode* .* \(.*\)$/ {\"lib\1\", (void *) \&\1},/p'" # Handle CRLF in mingw tool chain opt_cr= case $build_os in mingw*) opt_cr=`$ECHO 'x\{0,1\}' | tr x '\015'` # option cr in regexp ;; esac # Try without a prefix underscore, then with it. for ac_symprfx in "" "_"; do # Transform symcode, sympat, and symprfx into a raw symbol and a C symbol. symxfrm="\\1 $ac_symprfx\\2 \\2" # Write the raw and C identifiers. if test "$lt_cv_nm_interface" = "MS dumpbin"; then # Fake it for dumpbin and say T for any non-static function, # D for any global variable and I for any imported variable. # Also find C++ and __fastcall symbols from MSVC++, # which start with @ or ?. lt_cv_sys_global_symbol_pipe="$AWK '"\ " {last_section=section; section=\$ 3};"\ " /^COFF SYMBOL TABLE/{for(i in hide) delete hide[i]};"\ " /Section length .*#relocs.*(pick any)/{hide[last_section]=1};"\ " /^ *Symbol name *: /{split(\$ 0,sn,\":\"); si=substr(sn[2],2)};"\ " /^ *Type *: code/{print \"T\",si,substr(si,length(prfx))};"\ " /^ *Type *: data/{print \"I\",si,substr(si,length(prfx))};"\ " \$ 0!~/External *\|/{next};"\ " / 0+ UNDEF /{next}; / UNDEF \([^|]\)*()/{next};"\ " {if(hide[section]) next};"\ " {f=\"D\"}; \$ 0~/\(\).*\|/{f=\"T\"};"\ " {split(\$ 0,a,/\||\r/); split(a[2],s)};"\ " s[1]~/^[@?]/{print f,s[1],s[1]; next};"\ " s[1]~prfx {split(s[1],t,\"@\"); print f,t[1],substr(t[1],length(prfx))}"\ " ' prfx=^$ac_symprfx" else lt_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[ ]\($symcode$symcode*\)[ ][ ]*$ac_symprfx$sympat$opt_cr$/$symxfrm/p'" fi lt_cv_sys_global_symbol_pipe="$lt_cv_sys_global_symbol_pipe | sed '/ __gnu_lto/d'" # Check to see that the pipe works correctly. pipe_works=no rm -f conftest* cat > conftest.$ac_ext <<_LT_EOF #ifdef __cplusplus extern "C" { #endif char nm_test_var; void nm_test_func(void); void nm_test_func(void){} #ifdef __cplusplus } #endif int main(){nm_test_var='a';nm_test_func();return(0);} _LT_EOF if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 (eval $ac_compile) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; }; then # Now try to grab the symbols. nlist=conftest.nm $ECHO "$as_me:$LINENO: $NM conftest.$ac_objext | $lt_cv_sys_global_symbol_pipe > $nlist" >&5 if eval "$NM" conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist 2>&5 && test -s "$nlist"; then # Try sorting and uniquifying the output. if sort "$nlist" | uniq > "$nlist"T; then mv -f "$nlist"T "$nlist" else rm -f "$nlist"T fi # Make sure that we snagged all the symbols we need. if $GREP ' nm_test_var$' "$nlist" >/dev/null; then if $GREP ' nm_test_func$' "$nlist" >/dev/null; then cat <<_LT_EOF > conftest.$ac_ext /* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and tests. */ #if defined _WIN32 || defined __CYGWIN__ || defined _WIN32_WCE /* DATA imports from DLLs on WIN32 can't be const, because runtime relocations are performed -- see ld's documentation on pseudo-relocs. */ # define LT_DLSYM_CONST #elif defined __osf__ /* This system does not cope well with relocations in const data. */ # define LT_DLSYM_CONST #else # define LT_DLSYM_CONST const #endif #ifdef __cplusplus extern "C" { #endif _LT_EOF # Now generate the symbol file. eval "$lt_cv_sys_global_symbol_to_cdecl"' < "$nlist" | $GREP -v main >> conftest.$ac_ext' cat <<_LT_EOF >> conftest.$ac_ext /* The mapping between symbol names and symbols. */ LT_DLSYM_CONST struct { const char *name; void *address; } lt__PROGRAM__LTX_preloaded_symbols[] = { { "@PROGRAM@", (void *) 0 }, _LT_EOF $SED "s/^$symcode$symcode* .* \(.*\)$/ {\"\1\", (void *) \&\1},/" < "$nlist" | $GREP -v main >> conftest.$ac_ext cat <<\_LT_EOF >> conftest.$ac_ext {0, (void *) 0} }; /* This works around a problem in FreeBSD linker */ #ifdef FREEBSD_WORKAROUND static const void *lt_preloaded_setup() { return lt__PROGRAM__LTX_preloaded_symbols; } #endif #ifdef __cplusplus } #endif _LT_EOF # Now try linking the two files. mv conftest.$ac_objext conftstm.$ac_objext lt_globsym_save_LIBS=$LIBS lt_globsym_save_CFLAGS=$CFLAGS LIBS=conftstm.$ac_objext CFLAGS="$CFLAGS$lt_prog_compiler_no_builtin_flag" if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5 (eval $ac_link) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; } && test -s conftest$ac_exeext; then pipe_works=yes fi LIBS=$lt_globsym_save_LIBS CFLAGS=$lt_globsym_save_CFLAGS else echo "cannot find nm_test_func in $nlist" >&5 fi else echo "cannot find nm_test_var in $nlist" >&5 fi else echo "cannot run $lt_cv_sys_global_symbol_pipe" >&5 fi else echo "$progname: failed program was:" >&5 cat conftest.$ac_ext >&5 fi rm -rf conftest* conftst* # Do not use the global_symbol_pipe unless it works. if test yes = "$pipe_works"; then break else lt_cv_sys_global_symbol_pipe= fi done fi if test -z "$lt_cv_sys_global_symbol_pipe"; then lt_cv_sys_global_symbol_to_cdecl= fi if test -z "$lt_cv_sys_global_symbol_pipe$lt_cv_sys_global_symbol_to_cdecl"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5 $as_echo "failed" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: ok" >&5 $as_echo "ok" >&6; } fi # Response file support. if test "$lt_cv_nm_interface" = "MS dumpbin"; then nm_file_list_spec='@' elif $NM --help 2>/dev/null | grep '[@]FILE' >/dev/null; then nm_file_list_spec='@' fi { $as_echo "$as_me:${as_lineno-$LINENO}: checking for sysroot" >&5 $as_echo_n "checking for sysroot... " >&6; } # Check whether --with-sysroot was given. if test "${with_sysroot+set}" = set; then : withval=$with_sysroot; else with_sysroot=no fi lt_sysroot= case $with_sysroot in #( yes) if test yes = "$GCC"; then lt_sysroot=`$CC --print-sysroot 2>/dev/null` fi ;; #( /*) lt_sysroot=`echo "$with_sysroot" | sed -e "$sed_quote_subst"` ;; #( no|'') ;; #( *) { $as_echo "$as_me:${as_lineno-$LINENO}: result: $with_sysroot" >&5 $as_echo "$with_sysroot" >&6; } as_fn_error $? "The sysroot must be an absolute path." "$LINENO" 5 ;; esac { $as_echo "$as_me:${as_lineno-$LINENO}: result: ${lt_sysroot:-no}" >&5 $as_echo "${lt_sysroot:-no}" >&6; } { $as_echo "$as_me:${as_lineno-$LINENO}: checking for a working dd" >&5 $as_echo_n "checking for a working dd... " >&6; } if ${ac_cv_path_lt_DD+:} false; then : $as_echo_n "(cached) " >&6 else printf 0123456789abcdef0123456789abcdef >conftest.i cat conftest.i conftest.i >conftest2.i : ${lt_DD:=$DD} if test -z "$lt_DD"; then ac_path_lt_DD_found=false # Loop through the user's path and test for each of PROGNAME-LIST as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_prog in dd; do for ac_exec_ext in '' $ac_executable_extensions; do ac_path_lt_DD="$as_dir/$ac_prog$ac_exec_ext" as_fn_executable_p "$ac_path_lt_DD" || continue if "$ac_path_lt_DD" bs=32 count=1 conftest.out 2>/dev/null; then cmp -s conftest.i conftest.out \ && ac_cv_path_lt_DD="$ac_path_lt_DD" ac_path_lt_DD_found=: fi $ac_path_lt_DD_found && break 3 done done done IFS=$as_save_IFS if test -z "$ac_cv_path_lt_DD"; then : fi else ac_cv_path_lt_DD=$lt_DD fi rm -f conftest.i conftest2.i conftest.out fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_lt_DD" >&5 $as_echo "$ac_cv_path_lt_DD" >&6; } { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to truncate binary pipes" >&5 $as_echo_n "checking how to truncate binary pipes... " >&6; } if ${lt_cv_truncate_bin+:} false; then : $as_echo_n "(cached) " >&6 else printf 0123456789abcdef0123456789abcdef >conftest.i cat conftest.i conftest.i >conftest2.i lt_cv_truncate_bin= if "$ac_cv_path_lt_DD" bs=32 count=1 conftest.out 2>/dev/null; then cmp -s conftest.i conftest.out \ && lt_cv_truncate_bin="$ac_cv_path_lt_DD bs=4096 count=1" fi rm -f conftest.i conftest2.i conftest.out test -z "$lt_cv_truncate_bin" && lt_cv_truncate_bin="$SED -e 4q" fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_truncate_bin" >&5 $as_echo "$lt_cv_truncate_bin" >&6; } # Calculate cc_basename. Skip known compiler wrappers and cross-prefix. func_cc_basename () { for cc_temp in $*""; do case $cc_temp in compile | *[\\/]compile | ccache | *[\\/]ccache ) ;; distcc | *[\\/]distcc | purify | *[\\/]purify ) ;; \-*) ;; *) break;; esac done func_cc_basename_result=`$ECHO "$cc_temp" | $SED "s%.*/%%; s%^$host_alias-%%"` } # Check whether --enable-libtool-lock was given. if test "${enable_libtool_lock+set}" = set; then : enableval=$enable_libtool_lock; fi test no = "$enable_libtool_lock" || enable_libtool_lock=yes # Some flags need to be propagated to the compiler or linker for good # libtool support. case $host in ia64-*-hpux*) # Find out what ABI is being produced by ac_compile, and set mode # options accordingly. echo 'int i;' > conftest.$ac_ext if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 (eval $ac_compile) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; }; then case `/usr/bin/file conftest.$ac_objext` in *ELF-32*) HPUX_IA64_MODE=32 ;; *ELF-64*) HPUX_IA64_MODE=64 ;; esac fi rm -rf conftest* ;; *-*-irix6*) # Find out what ABI is being produced by ac_compile, and set linker # options accordingly. echo '#line '$LINENO' "configure"' > conftest.$ac_ext if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 (eval $ac_compile) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; }; then if test yes = "$lt_cv_prog_gnu_ld"; then case `/usr/bin/file conftest.$ac_objext` in *32-bit*) LD="${LD-ld} -melf32bsmip" ;; *N32*) LD="${LD-ld} -melf32bmipn32" ;; *64-bit*) LD="${LD-ld} -melf64bmip" ;; esac else case `/usr/bin/file conftest.$ac_objext` in *32-bit*) LD="${LD-ld} -32" ;; *N32*) LD="${LD-ld} -n32" ;; *64-bit*) LD="${LD-ld} -64" ;; esac fi fi rm -rf conftest* ;; mips64*-*linux*) # Find out what ABI is being produced by ac_compile, and set linker # options accordingly. echo '#line '$LINENO' "configure"' > conftest.$ac_ext if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 (eval $ac_compile) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; }; then emul=elf case `/usr/bin/file conftest.$ac_objext` in *32-bit*) emul="${emul}32" ;; *64-bit*) emul="${emul}64" ;; esac case `/usr/bin/file conftest.$ac_objext` in *MSB*) emul="${emul}btsmip" ;; *LSB*) emul="${emul}ltsmip" ;; esac case `/usr/bin/file conftest.$ac_objext` in *N32*) emul="${emul}n32" ;; esac LD="${LD-ld} -m $emul" fi rm -rf conftest* ;; x86_64-*kfreebsd*-gnu|x86_64-*linux*|powerpc*-*linux*| \ s390*-*linux*|s390*-*tpf*|sparc*-*linux*) # Find out what ABI is being produced by ac_compile, and set linker # options accordingly. Note that the listed cases only cover the # situations where additional linker options are needed (such as when # doing 32-bit compilation for a host where ld defaults to 64-bit, or # vice versa); the common cases where no linker options are needed do # not appear in the list. echo 'int i;' > conftest.$ac_ext if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 (eval $ac_compile) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; }; then case `/usr/bin/file conftest.o` in *32-bit*) case $host in x86_64-*kfreebsd*-gnu) LD="${LD-ld} -m elf_i386_fbsd" ;; x86_64-*linux*) case `/usr/bin/file conftest.o` in *x86-64*) LD="${LD-ld} -m elf32_x86_64" ;; *) LD="${LD-ld} -m elf_i386" ;; esac ;; powerpc64le-*linux*) LD="${LD-ld} -m elf32lppclinux" ;; powerpc64-*linux*) LD="${LD-ld} -m elf32ppclinux" ;; s390x-*linux*) LD="${LD-ld} -m elf_s390" ;; sparc64-*linux*) LD="${LD-ld} -m elf32_sparc" ;; esac ;; *64-bit*) case $host in x86_64-*kfreebsd*-gnu) LD="${LD-ld} -m elf_x86_64_fbsd" ;; x86_64-*linux*) LD="${LD-ld} -m elf_x86_64" ;; powerpcle-*linux*) LD="${LD-ld} -m elf64lppc" ;; powerpc-*linux*) LD="${LD-ld} -m elf64ppc" ;; s390*-*linux*|s390*-*tpf*) LD="${LD-ld} -m elf64_s390" ;; sparc*-*linux*) LD="${LD-ld} -m elf64_sparc" ;; esac ;; esac fi rm -rf conftest* ;; *-*-sco3.2v5*) # On SCO OpenServer 5, we need -belf to get full-featured binaries. SAVE_CFLAGS=$CFLAGS CFLAGS="$CFLAGS -belf" { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler needs -belf" >&5 $as_echo_n "checking whether the C compiler needs -belf... " >&6; } if ${lt_cv_cc_needs_belf+:} false; then : $as_echo_n "(cached) " >&6 else ac_ext=c ac_cpp='$CPP $CPPFLAGS' ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' ac_compiler_gnu=$ac_cv_c_compiler_gnu cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ int main () { ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : lt_cv_cc_needs_belf=yes else lt_cv_cc_needs_belf=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext ac_ext=c ac_cpp='$CPP $CPPFLAGS' ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' ac_compiler_gnu=$ac_cv_c_compiler_gnu fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_cc_needs_belf" >&5 $as_echo "$lt_cv_cc_needs_belf" >&6; } if test yes != "$lt_cv_cc_needs_belf"; then # this is probably gcc 2.8.0, egcs 1.0 or newer; no need for -belf CFLAGS=$SAVE_CFLAGS fi ;; *-*solaris*) # Find out what ABI is being produced by ac_compile, and set linker # options accordingly. echo 'int i;' > conftest.$ac_ext if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5 (eval $ac_compile) 2>&5 ac_status=$? $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 test $ac_status = 0; }; then case `/usr/bin/file conftest.o` in *64-bit*) case $lt_cv_prog_gnu_ld in yes*) case $host in i?86-*-solaris*|x86_64-*-solaris*) LD="${LD-ld} -m elf_x86_64" ;; sparc*-*-solaris*) LD="${LD-ld} -m elf64_sparc" ;; esac # GNU ld 2.21 introduced _sol2 emulations. Use them if available. if ${LD-ld} -V | grep _sol2 >/dev/null 2>&1; then LD=${LD-ld}_sol2 fi ;; *) if ${LD-ld} -64 -r -o conftest2.o conftest.o >/dev/null 2>&1; then LD="${LD-ld} -64" fi ;; esac ;; esac fi rm -rf conftest* ;; esac need_locks=$enable_libtool_lock if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}mt", so it can be a program name with args. set dummy ${ac_tool_prefix}mt; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_MANIFEST_TOOL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$MANIFEST_TOOL"; then ac_cv_prog_MANIFEST_TOOL="$MANIFEST_TOOL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_MANIFEST_TOOL="${ac_tool_prefix}mt" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi MANIFEST_TOOL=$ac_cv_prog_MANIFEST_TOOL if test -n "$MANIFEST_TOOL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MANIFEST_TOOL" >&5 $as_echo "$MANIFEST_TOOL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_MANIFEST_TOOL"; then ac_ct_MANIFEST_TOOL=$MANIFEST_TOOL # Extract the first word of "mt", so it can be a program name with args. set dummy mt; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_MANIFEST_TOOL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_MANIFEST_TOOL"; then ac_cv_prog_ac_ct_MANIFEST_TOOL="$ac_ct_MANIFEST_TOOL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_MANIFEST_TOOL="mt" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_MANIFEST_TOOL=$ac_cv_prog_ac_ct_MANIFEST_TOOL if test -n "$ac_ct_MANIFEST_TOOL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_MANIFEST_TOOL" >&5 $as_echo "$ac_ct_MANIFEST_TOOL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_MANIFEST_TOOL" = x; then MANIFEST_TOOL=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac MANIFEST_TOOL=$ac_ct_MANIFEST_TOOL fi else MANIFEST_TOOL="$ac_cv_prog_MANIFEST_TOOL" fi test -z "$MANIFEST_TOOL" && MANIFEST_TOOL=mt { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $MANIFEST_TOOL is a manifest tool" >&5 $as_echo_n "checking if $MANIFEST_TOOL is a manifest tool... " >&6; } if ${lt_cv_path_mainfest_tool+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_path_mainfest_tool=no echo "$as_me:$LINENO: $MANIFEST_TOOL '-?'" >&5 $MANIFEST_TOOL '-?' 2>conftest.err > conftest.out cat conftest.err >&5 if $GREP 'Manifest Tool' conftest.out > /dev/null; then lt_cv_path_mainfest_tool=yes fi rm -f conftest* fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_mainfest_tool" >&5 $as_echo "$lt_cv_path_mainfest_tool" >&6; } if test yes != "$lt_cv_path_mainfest_tool"; then MANIFEST_TOOL=: fi case $host_os in rhapsody* | darwin*) if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}dsymutil", so it can be a program name with args. set dummy ${ac_tool_prefix}dsymutil; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_DSYMUTIL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$DSYMUTIL"; then ac_cv_prog_DSYMUTIL="$DSYMUTIL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_DSYMUTIL="${ac_tool_prefix}dsymutil" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi DSYMUTIL=$ac_cv_prog_DSYMUTIL if test -n "$DSYMUTIL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DSYMUTIL" >&5 $as_echo "$DSYMUTIL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_DSYMUTIL"; then ac_ct_DSYMUTIL=$DSYMUTIL # Extract the first word of "dsymutil", so it can be a program name with args. set dummy dsymutil; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_DSYMUTIL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_DSYMUTIL"; then ac_cv_prog_ac_ct_DSYMUTIL="$ac_ct_DSYMUTIL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_DSYMUTIL="dsymutil" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_DSYMUTIL=$ac_cv_prog_ac_ct_DSYMUTIL if test -n "$ac_ct_DSYMUTIL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DSYMUTIL" >&5 $as_echo "$ac_ct_DSYMUTIL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_DSYMUTIL" = x; then DSYMUTIL=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac DSYMUTIL=$ac_ct_DSYMUTIL fi else DSYMUTIL="$ac_cv_prog_DSYMUTIL" fi if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}nmedit", so it can be a program name with args. set dummy ${ac_tool_prefix}nmedit; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_NMEDIT+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$NMEDIT"; then ac_cv_prog_NMEDIT="$NMEDIT" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_NMEDIT="${ac_tool_prefix}nmedit" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi NMEDIT=$ac_cv_prog_NMEDIT if test -n "$NMEDIT"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NMEDIT" >&5 $as_echo "$NMEDIT" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_NMEDIT"; then ac_ct_NMEDIT=$NMEDIT # Extract the first word of "nmedit", so it can be a program name with args. set dummy nmedit; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_NMEDIT+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_NMEDIT"; then ac_cv_prog_ac_ct_NMEDIT="$ac_ct_NMEDIT" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_NMEDIT="nmedit" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_NMEDIT=$ac_cv_prog_ac_ct_NMEDIT if test -n "$ac_ct_NMEDIT"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_NMEDIT" >&5 $as_echo "$ac_ct_NMEDIT" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_NMEDIT" = x; then NMEDIT=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac NMEDIT=$ac_ct_NMEDIT fi else NMEDIT="$ac_cv_prog_NMEDIT" fi if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}lipo", so it can be a program name with args. set dummy ${ac_tool_prefix}lipo; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_LIPO+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$LIPO"; then ac_cv_prog_LIPO="$LIPO" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_LIPO="${ac_tool_prefix}lipo" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi LIPO=$ac_cv_prog_LIPO if test -n "$LIPO"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LIPO" >&5 $as_echo "$LIPO" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_LIPO"; then ac_ct_LIPO=$LIPO # Extract the first word of "lipo", so it can be a program name with args. set dummy lipo; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_LIPO+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_LIPO"; then ac_cv_prog_ac_ct_LIPO="$ac_ct_LIPO" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_LIPO="lipo" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_LIPO=$ac_cv_prog_ac_ct_LIPO if test -n "$ac_ct_LIPO"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_LIPO" >&5 $as_echo "$ac_ct_LIPO" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_LIPO" = x; then LIPO=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac LIPO=$ac_ct_LIPO fi else LIPO="$ac_cv_prog_LIPO" fi if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}otool", so it can be a program name with args. set dummy ${ac_tool_prefix}otool; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_OTOOL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$OTOOL"; then ac_cv_prog_OTOOL="$OTOOL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_OTOOL="${ac_tool_prefix}otool" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi OTOOL=$ac_cv_prog_OTOOL if test -n "$OTOOL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL" >&5 $as_echo "$OTOOL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_OTOOL"; then ac_ct_OTOOL=$OTOOL # Extract the first word of "otool", so it can be a program name with args. set dummy otool; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_OTOOL+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_OTOOL"; then ac_cv_prog_ac_ct_OTOOL="$ac_ct_OTOOL" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_OTOOL="otool" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_OTOOL=$ac_cv_prog_ac_ct_OTOOL if test -n "$ac_ct_OTOOL"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL" >&5 $as_echo "$ac_ct_OTOOL" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_OTOOL" = x; then OTOOL=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac OTOOL=$ac_ct_OTOOL fi else OTOOL="$ac_cv_prog_OTOOL" fi if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}otool64", so it can be a program name with args. set dummy ${ac_tool_prefix}otool64; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_OTOOL64+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$OTOOL64"; then ac_cv_prog_OTOOL64="$OTOOL64" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_OTOOL64="${ac_tool_prefix}otool64" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi OTOOL64=$ac_cv_prog_OTOOL64 if test -n "$OTOOL64"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL64" >&5 $as_echo "$OTOOL64" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi fi if test -z "$ac_cv_prog_OTOOL64"; then ac_ct_OTOOL64=$OTOOL64 # Extract the first word of "otool64", so it can be a program name with args. set dummy otool64; ac_word=$2 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5 $as_echo_n "checking for $ac_word... " >&6; } if ${ac_cv_prog_ac_ct_OTOOL64+:} false; then : $as_echo_n "(cached) " >&6 else if test -n "$ac_ct_OTOOL64"; then ac_cv_prog_ac_ct_OTOOL64="$ac_ct_OTOOL64" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_OTOOL64="otool64" $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done IFS=$as_save_IFS fi fi ac_ct_OTOOL64=$ac_cv_prog_ac_ct_OTOOL64 if test -n "$ac_ct_OTOOL64"; then { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL64" >&5 $as_echo "$ac_ct_OTOOL64" >&6; } else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5 $as_echo "no" >&6; } fi if test "x$ac_ct_OTOOL64" = x; then OTOOL64=":" else case $cross_compiling:$ac_tool_warned in yes:) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5 $as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;} ac_tool_warned=yes ;; esac OTOOL64=$ac_ct_OTOOL64 fi else OTOOL64="$ac_cv_prog_OTOOL64" fi { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -single_module linker flag" >&5 $as_echo_n "checking for -single_module linker flag... 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We urge you to upgrade GNU *** binutils to release 2.16.91.0.3 or newer. Another option is to modify *** your PATH or compiler configuration so that the native linker is *** used, and then restart. _LT_EOF ;; *) # For security reasons, it is highly recommended that you always # use absolute paths for naming shared libraries, and exclude the # DT_RUNPATH tag from executables and libraries. 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The following line is correct: shared_flag='-G' else if test yes = "$aix_use_runtimelinking"; then shared_flag='$wl-G' else shared_flag='$wl-bM:SRE' fi shared_flag_aix='$wl-bM:SRE' shared_flag_svr4='$wl-G' fi fi export_dynamic_flag_spec='$wl-bexpall' # It seems that -bexpall does not export symbols beginning with # underscore (_), so it is better to generate a list of symbols to export. always_export_symbols=yes if test aix,yes = "$with_aix_soname,$aix_use_runtimelinking"; then # Warning - without using the other runtime loading flags (-brtl), # -berok will link without error, but may produce a broken library. allow_undefined_flag='-berok' # Determine the default libpath from the value encoded in an # empty executable. if test set = "${lt_cv_aix_libpath+set}"; then aix_libpath=$lt_cv_aix_libpath else if ${lt_cv_aix_libpath_+:} false; then : $as_echo_n "(cached) " >&6 else cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ int main () { ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : lt_aix_libpath_sed=' /Import File Strings/,/^$/ { /^0/ { s/^0 *\([^ ]*\) *$/\1/ p } }' lt_cv_aix_libpath_=`dump -H conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"` # Check for a 64-bit object if we didn't find anything. if test -z "$lt_cv_aix_libpath_"; then lt_cv_aix_libpath_=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"` fi fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext if test -z "$lt_cv_aix_libpath_"; then lt_cv_aix_libpath_=/usr/lib:/lib fi fi aix_libpath=$lt_cv_aix_libpath_ fi hardcode_libdir_flag_spec='$wl-blibpath:$libdir:'"$aix_libpath" archive_expsym_cmds='$CC -o $output_objdir/$soname $libobjs $deplibs $wl'$no_entry_flag' $compiler_flags `if test -n "$allow_undefined_flag"; then func_echo_all "$wl$allow_undefined_flag"; else :; fi` $wl'$exp_sym_flag:\$export_symbols' '$shared_flag else if test ia64 = "$host_cpu"; then hardcode_libdir_flag_spec='$wl-R $libdir:/usr/lib:/lib' allow_undefined_flag="-z nodefs" archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs '"\$wl$no_entry_flag"' $compiler_flags $wl$allow_undefined_flag '"\$wl$exp_sym_flag:\$export_symbols" else # Determine the default libpath from the value encoded in an # empty executable. if test set = "${lt_cv_aix_libpath+set}"; then aix_libpath=$lt_cv_aix_libpath else if ${lt_cv_aix_libpath_+:} false; then : $as_echo_n "(cached) " >&6 else cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ int main () { ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : lt_aix_libpath_sed=' /Import File Strings/,/^$/ { /^0/ { s/^0 *\([^ ]*\) *$/\1/ p } }' lt_cv_aix_libpath_=`dump -H conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"` # Check for a 64-bit object if we didn't find anything. if test -z "$lt_cv_aix_libpath_"; then lt_cv_aix_libpath_=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"` fi fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext if test -z "$lt_cv_aix_libpath_"; then lt_cv_aix_libpath_=/usr/lib:/lib fi fi aix_libpath=$lt_cv_aix_libpath_ fi hardcode_libdir_flag_spec='$wl-blibpath:$libdir:'"$aix_libpath" # Warning - without using the other run time loading flags, # -berok will link without error, but may produce a broken library. no_undefined_flag=' $wl-bernotok' allow_undefined_flag=' $wl-berok' if test yes = "$with_gnu_ld"; then # We only use this code for GNU lds that support --whole-archive. whole_archive_flag_spec='$wl--whole-archive$convenience $wl--no-whole-archive' else # Exported symbols can be pulled into shared objects from archives whole_archive_flag_spec='$convenience' fi archive_cmds_need_lc=yes archive_expsym_cmds='$RM -r $output_objdir/$realname.d~$MKDIR $output_objdir/$realname.d' # -brtl affects multiple linker settings, -berok does not and is overridden later compiler_flags_filtered='`func_echo_all "$compiler_flags " | $SED -e "s%-brtl\\([, ]\\)%-berok\\1%g"`' if test svr4 != "$with_aix_soname"; then # This is similar to how AIX traditionally builds its shared libraries. archive_expsym_cmds="$archive_expsym_cmds"'~$CC '$shared_flag_aix' -o $output_objdir/$realname.d/$soname $libobjs $deplibs $wl-bnoentry '$compiler_flags_filtered'$wl-bE:$export_symbols$allow_undefined_flag~$AR $AR_FLAGS $output_objdir/$libname$release.a $output_objdir/$realname.d/$soname' fi if test aix != "$with_aix_soname"; then archive_expsym_cmds="$archive_expsym_cmds"'~$CC '$shared_flag_svr4' -o $output_objdir/$realname.d/$shared_archive_member_spec.o $libobjs $deplibs $wl-bnoentry '$compiler_flags_filtered'$wl-bE:$export_symbols$allow_undefined_flag~$STRIP -e $output_objdir/$realname.d/$shared_archive_member_spec.o~( func_echo_all "#! $soname($shared_archive_member_spec.o)"; if test shr_64 = "$shared_archive_member_spec"; then func_echo_all "# 64"; else func_echo_all "# 32"; fi; cat $export_symbols ) > $output_objdir/$realname.d/$shared_archive_member_spec.imp~$AR $AR_FLAGS $output_objdir/$soname $output_objdir/$realname.d/$shared_archive_member_spec.o $output_objdir/$realname.d/$shared_archive_member_spec.imp' else # used by -dlpreopen to get the symbols archive_expsym_cmds="$archive_expsym_cmds"'~$MV $output_objdir/$realname.d/$soname $output_objdir' fi archive_expsym_cmds="$archive_expsym_cmds"'~$RM -r $output_objdir/$realname.d' fi fi ;; amigaos*) case $host_cpu in powerpc) # see comment about AmigaOS4 .so support archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' archive_expsym_cmds='' ;; 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dgux*) archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' hardcode_libdir_flag_spec='-L$libdir' hardcode_shlibpath_var=no ;; # FreeBSD 2.2.[012] allows us to include c++rt0.o to get C++ constructor # support. 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" >&6; } if ${lt_cv_irix_exported_symbol+:} false; then : $as_echo_n "(cached) " >&6 else save_LDFLAGS=$LDFLAGS LDFLAGS="$LDFLAGS -shared $wl-exported_symbol ${wl}foo $wl-update_registry $wl/dev/null" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ int foo (void) { return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : lt_cv_irix_exported_symbol=yes else lt_cv_irix_exported_symbol=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext LDFLAGS=$save_LDFLAGS fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_irix_exported_symbol" >&5 $as_echo "$lt_cv_irix_exported_symbol" >&6; } if test yes = "$lt_cv_irix_exported_symbol"; then archive_expsym_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations $wl-exports_file $wl$export_symbols -o $lib' fi link_all_deplibs=no else archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib' archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -exports_file $export_symbols -o $lib' fi archive_cmds_need_lc='no' hardcode_libdir_flag_spec='$wl-rpath $wl$libdir' hardcode_libdir_separator=: inherit_rpath=yes link_all_deplibs=yes ;; linux*) case $cc_basename in tcc*) # Fabrice Bellard et al's Tiny C Compiler ld_shlibs=yes archive_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags' ;; esac ;; netbsd* | netbsdelf*-gnu) if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags' # a.out else archive_cmds='$LD -shared -o $lib $libobjs $deplibs $linker_flags' # ELF fi hardcode_libdir_flag_spec='-R$libdir' hardcode_direct=yes hardcode_shlibpath_var=no ;; newsos6) archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' hardcode_direct=yes hardcode_libdir_flag_spec='$wl-rpath $wl$libdir' hardcode_libdir_separator=: hardcode_shlibpath_var=no ;; *nto* | *qnx*) ;; openbsd* | bitrig*) if test -f /usr/libexec/ld.so; then hardcode_direct=yes hardcode_shlibpath_var=no hardcode_direct_absolute=yes if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`"; then archive_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags' archive_expsym_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags $wl-retain-symbols-file,$export_symbols' hardcode_libdir_flag_spec='$wl-rpath,$libdir' export_dynamic_flag_spec='$wl-E' else archive_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags' hardcode_libdir_flag_spec='$wl-rpath,$libdir' fi else ld_shlibs=no fi ;; os2*) hardcode_libdir_flag_spec='-L$libdir' hardcode_minus_L=yes allow_undefined_flag=unsupported shrext_cmds=.dll archive_cmds='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~ $ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~ $ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~ $ECHO EXPORTS >> $output_objdir/$libname.def~ emxexp $libobjs | $SED /"_DLL_InitTerm"/d >> $output_objdir/$libname.def~ $CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~ emximp -o $lib $output_objdir/$libname.def' archive_expsym_cmds='$ECHO "LIBRARY ${soname%$shared_ext} INITINSTANCE TERMINSTANCE" > $output_objdir/$libname.def~ $ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~ $ECHO "DATA MULTIPLE NONSHARED" >> $output_objdir/$libname.def~ $ECHO EXPORTS >> $output_objdir/$libname.def~ prefix_cmds="$SED"~ if test EXPORTS = "`$SED 1q $export_symbols`"; then prefix_cmds="$prefix_cmds -e 1d"; fi~ prefix_cmds="$prefix_cmds -e \"s/^\(.*\)$/_\1/g\""~ cat $export_symbols | $prefix_cmds >> $output_objdir/$libname.def~ $CC -Zdll -Zcrtdll -o $output_objdir/$soname $libobjs $deplibs $compiler_flags $output_objdir/$libname.def~ emximp -o $lib $output_objdir/$libname.def' old_archive_From_new_cmds='emximp -o $output_objdir/${libname}_dll.a $output_objdir/$libname.def' enable_shared_with_static_runtimes=yes ;; osf3*) if test yes = "$GCC"; then allow_undefined_flag=' $wl-expect_unresolved $wl\*' archive_cmds='$CC -shared$allow_undefined_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib' else allow_undefined_flag=' -expect_unresolved \*' archive_cmds='$CC -shared$allow_undefined_flag $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib' fi archive_cmds_need_lc='no' hardcode_libdir_flag_spec='$wl-rpath $wl$libdir' hardcode_libdir_separator=: ;; osf4* | osf5*) # as osf3* with the addition of -msym flag if test yes = "$GCC"; then allow_undefined_flag=' $wl-expect_unresolved $wl\*' archive_cmds='$CC -shared$allow_undefined_flag $pic_flag $libobjs $deplibs $compiler_flags $wl-msym $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations -o $lib' hardcode_libdir_flag_spec='$wl-rpath $wl$libdir' else allow_undefined_flag=' -expect_unresolved \*' archive_cmds='$CC -shared$allow_undefined_flag $libobjs $deplibs $compiler_flags -msym -soname $soname `test -n "$verstring" && func_echo_all "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib' archive_expsym_cmds='for i in `cat $export_symbols`; do printf "%s %s\\n" -exported_symbol "\$i" >> $lib.exp; done; printf "%s\\n" "-hidden">> $lib.exp~ $CC -shared$allow_undefined_flag $wl-input $wl$lib.exp $compiler_flags $libobjs $deplibs -soname $soname `test -n "$verstring" && $ECHO "-set_version $verstring"` -update_registry $output_objdir/so_locations -o $lib~$RM $lib.exp' # Both c and cxx compiler support -rpath directly hardcode_libdir_flag_spec='-rpath $libdir' fi archive_cmds_need_lc='no' hardcode_libdir_separator=: ;; solaris*) no_undefined_flag=' -z defs' if test yes = "$GCC"; then wlarc='$wl' archive_cmds='$CC -shared $pic_flag $wl-z ${wl}text $wl-h $wl$soname -o $lib $libobjs $deplibs $compiler_flags' archive_expsym_cmds='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ $CC -shared $pic_flag $wl-z ${wl}text $wl-M $wl$lib.exp $wl-h $wl$soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp' else case `$CC -V 2>&1` in *"Compilers 5.0"*) wlarc='' archive_cmds='$LD -G$allow_undefined_flag -h $soname -o $lib $libobjs $deplibs $linker_flags' archive_expsym_cmds='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ $LD -G$allow_undefined_flag -M $lib.exp -h $soname -o $lib $libobjs $deplibs $linker_flags~$RM $lib.exp' ;; *) wlarc='$wl' archive_cmds='$CC -G$allow_undefined_flag -h $soname -o $lib $libobjs $deplibs $compiler_flags' archive_expsym_cmds='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ $CC -G$allow_undefined_flag -M $lib.exp -h $soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp' ;; esac fi hardcode_libdir_flag_spec='-R$libdir' hardcode_shlibpath_var=no case $host_os in solaris2.[0-5] | solaris2.[0-5].*) ;; *) # The compiler driver will combine and reorder linker options, # but understands '-z linker_flag'. GCC discards it without '$wl', # but is careful enough not to reorder. # Supported since Solaris 2.6 (maybe 2.5.1?) if test yes = "$GCC"; then whole_archive_flag_spec='$wl-z ${wl}allextract$convenience $wl-z ${wl}defaultextract' else whole_archive_flag_spec='-z allextract$convenience -z defaultextract' fi ;; esac link_all_deplibs=yes ;; sunos4*) if test sequent = "$host_vendor"; then # Use $CC to link under sequent, because it throws in some extra .o # files that make .init and .fini sections work. archive_cmds='$CC -G $wl-h $soname -o $lib $libobjs $deplibs $compiler_flags' else archive_cmds='$LD -assert pure-text -Bstatic -o $lib $libobjs $deplibs $linker_flags' fi hardcode_libdir_flag_spec='-L$libdir' hardcode_direct=yes hardcode_minus_L=yes hardcode_shlibpath_var=no ;; sysv4) case $host_vendor in sni) archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' hardcode_direct=yes # is this really true??? ;; siemens) ## LD is ld it makes a PLAMLIB ## CC just makes a GrossModule. archive_cmds='$LD -G -o $lib $libobjs $deplibs $linker_flags' reload_cmds='$CC -r -o $output$reload_objs' hardcode_direct=no ;; motorola) archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' hardcode_direct=no #Motorola manual says yes, but my tests say they lie ;; esac runpath_var='LD_RUN_PATH' hardcode_shlibpath_var=no ;; sysv4.3*) archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' hardcode_shlibpath_var=no export_dynamic_flag_spec='-Bexport' ;; sysv4*MP*) if test -d /usr/nec; then archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags' hardcode_shlibpath_var=no runpath_var=LD_RUN_PATH hardcode_runpath_var=yes ld_shlibs=yes fi ;; sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[01].[10]* | unixware7* | sco3.2v5.0.[024]*) no_undefined_flag='$wl-z,text' archive_cmds_need_lc=no hardcode_shlibpath_var=no runpath_var='LD_RUN_PATH' if test yes = "$GCC"; then archive_cmds='$CC -shared $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags' archive_expsym_cmds='$CC -shared $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags' else archive_cmds='$CC -G $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags' archive_expsym_cmds='$CC -G $wl-Bexport:$export_symbols $wl-h,$soname -o $lib $libobjs $deplibs $compiler_flags' fi ;; sysv5* | sco3.2v5* | sco5v6*) # Note: We CANNOT use -z defs as we might desire, because we do not # link with -lc, and that would cause any symbols used from libc to # always be unresolved, which means just about no library would # ever link correctly. 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esac # HP-UX runs *really* slowly unless shared libraries are mode 555, ... postinstall_cmds='chmod 555 $lib' # or fails outright, so override atomically: install_override_mode=555 ;; interix[3-9]*) version_type=linux # correct to gnu/linux during the next big refactor need_lib_prefix=no need_version=no library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' soname_spec='$libname$release$shared_ext$major' dynamic_linker='Interix 3.x ld.so.1 (PE, like ELF)' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=no hardcode_into_libs=yes ;; irix5* | irix6* | nonstopux*) case $host_os in nonstopux*) version_type=nonstopux ;; *) if test yes = "$lt_cv_prog_gnu_ld"; then version_type=linux # correct to gnu/linux during the next big refactor else version_type=irix fi ;; esac need_lib_prefix=no need_version=no soname_spec='$libname$release$shared_ext$major' library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$release$shared_ext $libname$shared_ext' case $host_os in irix5* | nonstopux*) libsuff= shlibsuff= ;; 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# This must be glibc/ELF. linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*) version_type=linux # correct to gnu/linux during the next big refactor need_lib_prefix=no need_version=no library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' soname_spec='$libname$release$shared_ext$major' finish_cmds='PATH="\$PATH:/sbin" ldconfig -n $libdir' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=no # Some binutils ld are patched to set DT_RUNPATH if ${lt_cv_shlibpath_overrides_runpath+:} false; then : $as_echo_n "(cached) " >&6 else lt_cv_shlibpath_overrides_runpath=no save_LDFLAGS=$LDFLAGS save_libdir=$libdir eval "libdir=/foo; wl=\"$lt_prog_compiler_wl\"; \ LDFLAGS=\"\$LDFLAGS $hardcode_libdir_flag_spec\"" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ int main () { ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : if ($OBJDUMP -p conftest$ac_exeext) 2>/dev/null | grep "RUNPATH.*$libdir" >/dev/null; then : lt_cv_shlibpath_overrides_runpath=yes fi fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext LDFLAGS=$save_LDFLAGS libdir=$save_libdir fi shlibpath_overrides_runpath=$lt_cv_shlibpath_overrides_runpath # This implies no fast_install, which is unacceptable. # Some rework will be needed to allow for fast_install # before this can be enabled. hardcode_into_libs=yes # Ideally, we could use ldconfig to report *all* directores which are # searched for libraries, however this is still not possible. Aside from not # being certain /sbin/ldconfig is available, command # 'ldconfig -N -X -v | grep ^/' on 64bit Fedora does not report /usr/lib64, # even though it is searched at run-time. Try to do the best guess by # appending ld.so.conf contents (and includes) to the search path. if test -f /etc/ld.so.conf; then lt_ld_extra=`awk '/^include / { system(sprintf("cd /etc; cat %s 2>/dev/null", \$2)); skip = 1; } { if (!skip) print \$0; skip = 0; }' < /etc/ld.so.conf | $SED -e 's/#.*//;/^[ ]*hwcap[ ]/d;s/[:, ]/ /g;s/=[^=]*$//;s/=[^= ]* / /g;s/"//g;/^$/d' | tr '\n' ' '` sys_lib_dlsearch_path_spec="/lib /usr/lib $lt_ld_extra" fi # We used to test for /lib/ld.so.1 and disable shared libraries on # powerpc, because MkLinux only supported shared libraries with the # GNU dynamic linker. Since this was broken with cross compilers, # most powerpc-linux boxes support dynamic linking these days and # people can always --disable-shared, the test was removed, and we # assume the GNU/Linux dynamic linker is in use. dynamic_linker='GNU/Linux ld.so' ;; netbsdelf*-gnu) version_type=linux need_lib_prefix=no need_version=no library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${shared_ext}' soname_spec='${libname}${release}${shared_ext}$major' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=no hardcode_into_libs=yes dynamic_linker='NetBSD ld.elf_so' ;; netbsd*) version_type=sunos need_lib_prefix=no need_version=no if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix' finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir' dynamic_linker='NetBSD (a.out) ld.so' else library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' soname_spec='$libname$release$shared_ext$major' dynamic_linker='NetBSD ld.elf_so' fi shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=yes hardcode_into_libs=yes ;; newsos6) version_type=linux # correct to gnu/linux during the next big refactor library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=yes ;; *nto* | *qnx*) version_type=qnx need_lib_prefix=no need_version=no library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' soname_spec='$libname$release$shared_ext$major' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=no hardcode_into_libs=yes dynamic_linker='ldqnx.so' ;; openbsd* | bitrig*) version_type=sunos sys_lib_dlsearch_path_spec=/usr/lib need_lib_prefix=no if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`"; then need_version=no else need_version=yes fi library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix' finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=yes ;; os2*) libname_spec='$name' version_type=windows shrext_cmds=.dll need_version=no need_lib_prefix=no # OS/2 can only load a DLL with a base name of 8 characters or less. soname_spec='`test -n "$os2dllname" && libname="$os2dllname"; v=$($ECHO $release$versuffix | tr -d .-); n=$($ECHO $libname | cut -b -$((8 - ${#v})) | tr . _); $ECHO $n$v`$shared_ext' library_names_spec='${libname}_dll.$libext' dynamic_linker='OS/2 ld.exe' shlibpath_var=BEGINLIBPATH sys_lib_search_path_spec="/lib /usr/lib /usr/local/lib" sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec postinstall_cmds='base_file=`basename \$file`~ dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\$base_file'\''i; $ECHO \$dlname'\''`~ dldir=$destdir/`dirname \$dlpath`~ test -d \$dldir || mkdir -p \$dldir~ $install_prog $dir/$dlname \$dldir/$dlname~ chmod a+x \$dldir/$dlname~ if test -n '\''$stripme'\'' && test -n '\''$striplib'\''; then eval '\''$striplib \$dldir/$dlname'\'' || exit \$?; fi' postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; $ECHO \$dlname'\''`~ dlpath=$dir/\$dldll~ $RM \$dlpath' ;; osf3* | osf4* | osf5*) version_type=osf need_lib_prefix=no need_version=no soname_spec='$libname$release$shared_ext$major' library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' shlibpath_var=LD_LIBRARY_PATH sys_lib_search_path_spec="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc /usr/lib /usr/local/lib /var/shlib" sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec ;; rdos*) dynamic_linker=no ;; solaris*) version_type=linux # correct to gnu/linux during the next big refactor need_lib_prefix=no need_version=no library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' soname_spec='$libname$release$shared_ext$major' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=yes hardcode_into_libs=yes # ldd complains unless libraries are executable postinstall_cmds='chmod +x $lib' ;; sunos4*) version_type=sunos library_names_spec='$libname$release$shared_ext$versuffix $libname$shared_ext$versuffix' finish_cmds='PATH="\$PATH:/usr/etc" ldconfig $libdir' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=yes if test yes = "$with_gnu_ld"; then need_lib_prefix=no fi need_version=yes ;; sysv4 | sysv4.3*) version_type=linux # correct to gnu/linux during the next big refactor library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' soname_spec='$libname$release$shared_ext$major' shlibpath_var=LD_LIBRARY_PATH case $host_vendor in sni) shlibpath_overrides_runpath=no need_lib_prefix=no runpath_var=LD_RUN_PATH ;; siemens) need_lib_prefix=no ;; motorola) need_lib_prefix=no need_version=no shlibpath_overrides_runpath=no sys_lib_search_path_spec='/lib /usr/lib /usr/ccs/lib' ;; esac ;; sysv4*MP*) if test -d /usr/nec; then version_type=linux # correct to gnu/linux during the next big refactor library_names_spec='$libname$shared_ext.$versuffix $libname$shared_ext.$major $libname$shared_ext' soname_spec='$libname$shared_ext.$major' shlibpath_var=LD_LIBRARY_PATH fi ;; sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*) version_type=sco need_lib_prefix=no need_version=no library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext $libname$shared_ext' soname_spec='$libname$release$shared_ext$major' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=yes hardcode_into_libs=yes if test yes = "$with_gnu_ld"; then sys_lib_search_path_spec='/usr/local/lib /usr/gnu/lib /usr/ccs/lib /usr/lib /lib' else sys_lib_search_path_spec='/usr/ccs/lib /usr/lib' case $host_os in sco3.2v5*) sys_lib_search_path_spec="$sys_lib_search_path_spec /lib" ;; esac fi sys_lib_dlsearch_path_spec='/usr/lib' ;; tpf*) # TPF is a cross-target only. Preferred cross-host = GNU/Linux. version_type=linux # correct to gnu/linux during the next big refactor need_lib_prefix=no need_version=no library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=no hardcode_into_libs=yes ;; uts4*) version_type=linux # correct to gnu/linux during the next big refactor library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' soname_spec='$libname$release$shared_ext$major' shlibpath_var=LD_LIBRARY_PATH ;; *) dynamic_linker=no ;; esac { $as_echo "$as_me:${as_lineno-$LINENO}: result: $dynamic_linker" >&5 $as_echo "$dynamic_linker" >&6; } test no = "$dynamic_linker" && can_build_shared=no variables_saved_for_relink="PATH $shlibpath_var $runpath_var" if test yes = "$GCC"; then variables_saved_for_relink="$variables_saved_for_relink GCC_EXEC_PREFIX COMPILER_PATH LIBRARY_PATH" fi if test set = "${lt_cv_sys_lib_search_path_spec+set}"; then sys_lib_search_path_spec=$lt_cv_sys_lib_search_path_spec fi if test set = "${lt_cv_sys_lib_dlsearch_path_spec+set}"; then sys_lib_dlsearch_path_spec=$lt_cv_sys_lib_dlsearch_path_spec fi # remember unaugmented sys_lib_dlsearch_path content for libtool script decls... configure_time_dlsearch_path=$sys_lib_dlsearch_path_spec # ... but it needs LT_SYS_LIBRARY_PATH munging for other configure-time code func_munge_path_list sys_lib_dlsearch_path_spec "$LT_SYS_LIBRARY_PATH" # to be used as default LT_SYS_LIBRARY_PATH value in generated libtool configure_time_lt_sys_library_path=$LT_SYS_LIBRARY_PATH { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to hardcode library paths into programs" >&5 $as_echo_n "checking how to hardcode library paths into programs... " >&6; } hardcode_action= if test -n "$hardcode_libdir_flag_spec" || test -n "$runpath_var" || test yes = "$hardcode_automatic"; then # We can hardcode non-existent directories. if test no != "$hardcode_direct" && # If the only mechanism to avoid hardcoding is shlibpath_var, we # have to relink, otherwise we might link with an installed library # when we should be linking with a yet-to-be-installed one ## test no != "$_LT_TAGVAR(hardcode_shlibpath_var, )" && test no != "$hardcode_minus_L"; then # Linking always hardcodes the temporary library directory. hardcode_action=relink else # We can link without hardcoding, and we can hardcode nonexisting dirs. hardcode_action=immediate fi else # We cannot hardcode anything, or else we can only hardcode existing # directories. hardcode_action=unsupported fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $hardcode_action" >&5 $as_echo "$hardcode_action" >&6; } if test relink = "$hardcode_action" || test yes = "$inherit_rpath"; then # Fast installation is not supported enable_fast_install=no elif test yes = "$shlibpath_overrides_runpath" || test no = "$enable_shared"; then # Fast installation is not necessary enable_fast_install=needless fi if test yes != "$enable_dlopen"; then enable_dlopen=unknown enable_dlopen_self=unknown enable_dlopen_self_static=unknown else lt_cv_dlopen=no lt_cv_dlopen_libs= case $host_os in beos*) lt_cv_dlopen=load_add_on lt_cv_dlopen_libs= lt_cv_dlopen_self=yes ;; mingw* | pw32* | cegcc*) lt_cv_dlopen=LoadLibrary lt_cv_dlopen_libs= ;; cygwin*) lt_cv_dlopen=dlopen lt_cv_dlopen_libs= ;; darwin*) # if libdl is installed we need to link against it { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5 $as_echo_n "checking for dlopen in -ldl... " >&6; } if ${ac_cv_lib_dl_dlopen+:} false; then : $as_echo_n "(cached) " >&6 else ac_check_lib_save_LIBS=$LIBS LIBS="-ldl $LIBS" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ /* Override any GCC internal prototype to avoid an error. Use char because int might match the return type of a GCC builtin and then its argument prototype would still apply. */ #ifdef __cplusplus extern "C" #endif char dlopen (); int main () { return dlopen (); ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : ac_cv_lib_dl_dlopen=yes else ac_cv_lib_dl_dlopen=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext LIBS=$ac_check_lib_save_LIBS fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5 $as_echo "$ac_cv_lib_dl_dlopen" >&6; } if test "x$ac_cv_lib_dl_dlopen" = xyes; then : lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl else lt_cv_dlopen=dyld lt_cv_dlopen_libs= lt_cv_dlopen_self=yes fi ;; tpf*) # Don't try to run any link tests for TPF. We know it's impossible # because TPF is a cross-compiler, and we know how we open DSOs. lt_cv_dlopen=dlopen lt_cv_dlopen_libs= lt_cv_dlopen_self=no ;; *) ac_fn_c_check_func "$LINENO" "shl_load" "ac_cv_func_shl_load" if test "x$ac_cv_func_shl_load" = xyes; then : lt_cv_dlopen=shl_load else { $as_echo "$as_me:${as_lineno-$LINENO}: checking for shl_load in -ldld" >&5 $as_echo_n "checking for shl_load in -ldld... " >&6; } if ${ac_cv_lib_dld_shl_load+:} false; then : $as_echo_n "(cached) " >&6 else ac_check_lib_save_LIBS=$LIBS LIBS="-ldld $LIBS" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ /* Override any GCC internal prototype to avoid an error. Use char because int might match the return type of a GCC builtin and then its argument prototype would still apply. */ #ifdef __cplusplus extern "C" #endif char shl_load (); int main () { return shl_load (); ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : ac_cv_lib_dld_shl_load=yes else ac_cv_lib_dld_shl_load=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext LIBS=$ac_check_lib_save_LIBS fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_shl_load" >&5 $as_echo "$ac_cv_lib_dld_shl_load" >&6; } if test "x$ac_cv_lib_dld_shl_load" = xyes; then : lt_cv_dlopen=shl_load lt_cv_dlopen_libs=-ldld else ac_fn_c_check_func "$LINENO" "dlopen" "ac_cv_func_dlopen" if test "x$ac_cv_func_dlopen" = xyes; then : lt_cv_dlopen=dlopen else { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5 $as_echo_n "checking for dlopen in -ldl... " >&6; } if ${ac_cv_lib_dl_dlopen+:} false; then : $as_echo_n "(cached) " >&6 else ac_check_lib_save_LIBS=$LIBS LIBS="-ldl $LIBS" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ /* Override any GCC internal prototype to avoid an error. Use char because int might match the return type of a GCC builtin and then its argument prototype would still apply. */ #ifdef __cplusplus extern "C" #endif char dlopen (); int main () { return dlopen (); ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : ac_cv_lib_dl_dlopen=yes else ac_cv_lib_dl_dlopen=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext LIBS=$ac_check_lib_save_LIBS fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5 $as_echo "$ac_cv_lib_dl_dlopen" >&6; } if test "x$ac_cv_lib_dl_dlopen" = xyes; then : lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl else { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -lsvld" >&5 $as_echo_n "checking for dlopen in -lsvld... " >&6; } if ${ac_cv_lib_svld_dlopen+:} false; then : $as_echo_n "(cached) " >&6 else ac_check_lib_save_LIBS=$LIBS LIBS="-lsvld $LIBS" cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ /* Override any GCC internal prototype to avoid an error. Use char because int might match the return type of a GCC builtin and then its argument prototype would still apply. */ #ifdef __cplusplus extern "C" #endif char dlopen (); int main () { return dlopen (); ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : ac_cv_lib_svld_dlopen=yes else ac_cv_lib_svld_dlopen=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext LIBS=$ac_check_lib_save_LIBS fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_svld_dlopen" >&5 $as_echo "$ac_cv_lib_svld_dlopen" >&6; } if test "x$ac_cv_lib_svld_dlopen" = xyes; then : lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-lsvld else { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dld_link in -ldld" >&5 $as_echo_n "checking for dld_link in -ldld... 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cat conftest.err >&AS_MESSAGE_LOG_FD echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD if (exit $ac_status) && test -s "$ac_outfile"; then # The compiler can only warn and ignore the option if not recognized # So say no if there are warnings other than the usual output. $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' >conftest.exp $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2 if test ! -s conftest.er2 || diff conftest.exp conftest.er2 >/dev/null; then $2=yes fi fi $RM conftest* ]) if test yes = "[$]$2"; then m4_if([$5], , :, [$5]) else m4_if([$6], , :, [$6]) fi ])# _LT_COMPILER_OPTION # Old name: AU_ALIAS([AC_LIBTOOL_COMPILER_OPTION], [_LT_COMPILER_OPTION]) dnl aclocal-1.4 backwards compatibility: dnl AC_DEFUN([AC_LIBTOOL_COMPILER_OPTION], []) # _LT_LINKER_OPTION(MESSAGE, VARIABLE-NAME, FLAGS, # [ACTION-SUCCESS], [ACTION-FAILURE]) # ---------------------------------------------------- # Check whether the given linker option works AC_DEFUN([_LT_LINKER_OPTION], [m4_require([_LT_FILEUTILS_DEFAULTS])dnl m4_require([_LT_DECL_SED])dnl AC_CACHE_CHECK([$1], [$2], [$2=no save_LDFLAGS=$LDFLAGS LDFLAGS="$LDFLAGS $3" echo "$lt_simple_link_test_code" > conftest.$ac_ext if (eval $ac_link 2>conftest.err) && test -s conftest$ac_exeext; then # The linker can only warn and ignore the option if not recognized # So say no if there are warnings if test -s conftest.err; then # Append any errors to the config.log. cat conftest.err 1>&AS_MESSAGE_LOG_FD $ECHO "$_lt_linker_boilerplate" | $SED '/^$/d' > conftest.exp $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2 if diff conftest.exp conftest.er2 >/dev/null; then $2=yes fi else $2=yes fi fi $RM -r conftest* LDFLAGS=$save_LDFLAGS ]) if test yes = "[$]$2"; then m4_if([$4], , :, [$4]) else m4_if([$5], , :, [$5]) fi ])# _LT_LINKER_OPTION # Old name: AU_ALIAS([AC_LIBTOOL_LINKER_OPTION], [_LT_LINKER_OPTION]) dnl aclocal-1.4 backwards compatibility: dnl AC_DEFUN([AC_LIBTOOL_LINKER_OPTION], []) # LT_CMD_MAX_LEN #--------------- AC_DEFUN([LT_CMD_MAX_LEN], [AC_REQUIRE([AC_CANONICAL_HOST])dnl # find the maximum length of command line arguments AC_MSG_CHECKING([the maximum length of command line arguments]) AC_CACHE_VAL([lt_cv_sys_max_cmd_len], [dnl i=0 teststring=ABCD case $build_os in msdosdjgpp*) # On DJGPP, this test can blow up pretty badly due to problems in libc # (any single argument exceeding 2000 bytes causes a buffer overrun # during glob expansion). Even if it were fixed, the result of this # check would be larger than it should be. lt_cv_sys_max_cmd_len=12288; # 12K is about right ;; gnu*) # Under GNU Hurd, this test is not required because there is # no limit to the length of command line arguments. # Libtool will interpret -1 as no limit whatsoever lt_cv_sys_max_cmd_len=-1; ;; cygwin* | mingw* | cegcc*) # On Win9x/ME, this test blows up -- it succeeds, but takes # about 5 minutes as the teststring grows exponentially. # Worse, since 9x/ME are not pre-emptively multitasking, # you end up with a "frozen" computer, even though with patience # the test eventually succeeds (with a max line length of 256k). # Instead, let's just punt: use the minimum linelength reported by # all of the supported platforms: 8192 (on NT/2K/XP). lt_cv_sys_max_cmd_len=8192; ;; mint*) # On MiNT this can take a long time and run out of memory. lt_cv_sys_max_cmd_len=8192; ;; amigaos*) # On AmigaOS with pdksh, this test takes hours, literally. # So we just punt and use a minimum line length of 8192. lt_cv_sys_max_cmd_len=8192; ;; bitrig* | darwin* | dragonfly* | freebsd* | netbsd* | openbsd*) # This has been around since 386BSD, at least. Likely further. if test -x /sbin/sysctl; then lt_cv_sys_max_cmd_len=`/sbin/sysctl -n kern.argmax` elif test -x /usr/sbin/sysctl; then lt_cv_sys_max_cmd_len=`/usr/sbin/sysctl -n kern.argmax` else lt_cv_sys_max_cmd_len=65536 # usable default for all BSDs fi # And add a safety zone lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4` lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3` ;; interix*) # We know the value 262144 and hardcode it with a safety zone (like BSD) lt_cv_sys_max_cmd_len=196608 ;; os2*) # The test takes a long time on OS/2. lt_cv_sys_max_cmd_len=8192 ;; osf*) # Dr. Hans Ekkehard Plesser reports seeing a kernel panic running configure # due to this test when exec_disable_arg_limit is 1 on Tru64. It is not # nice to cause kernel panics so lets avoid the loop below. # First set a reasonable default. lt_cv_sys_max_cmd_len=16384 # if test -x /sbin/sysconfig; then case `/sbin/sysconfig -q proc exec_disable_arg_limit` in *1*) lt_cv_sys_max_cmd_len=-1 ;; esac fi ;; sco3.2v5*) lt_cv_sys_max_cmd_len=102400 ;; sysv5* | sco5v6* | sysv4.2uw2*) kargmax=`grep ARG_MAX /etc/conf/cf.d/stune 2>/dev/null` if test -n "$kargmax"; then lt_cv_sys_max_cmd_len=`echo $kargmax | sed 's/.*[[ ]]//'` else lt_cv_sys_max_cmd_len=32768 fi ;; *) lt_cv_sys_max_cmd_len=`(getconf ARG_MAX) 2> /dev/null` if test -n "$lt_cv_sys_max_cmd_len" && \ test undefined != "$lt_cv_sys_max_cmd_len"; then lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4` lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3` else # Make teststring a little bigger before we do anything with it. # a 1K string should be a reasonable start. for i in 1 2 3 4 5 6 7 8; do teststring=$teststring$teststring done SHELL=${SHELL-${CONFIG_SHELL-/bin/sh}} # If test is not a shell built-in, we'll probably end up computing a # maximum length that is only half of the actual maximum length, but # we can't tell. while { test X`env echo "$teststring$teststring" 2>/dev/null` \ = "X$teststring$teststring"; } >/dev/null 2>&1 && test 17 != "$i" # 1/2 MB should be enough do i=`expr $i + 1` teststring=$teststring$teststring done # Only check the string length outside the loop. lt_cv_sys_max_cmd_len=`expr "X$teststring" : ".*" 2>&1` teststring= # Add a significant safety factor because C++ compilers can tack on # massive amounts of additional arguments before passing them to the # linker. It appears as though 1/2 is a usable value. lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 2` fi ;; esac ]) if test -n "$lt_cv_sys_max_cmd_len"; then AC_MSG_RESULT($lt_cv_sys_max_cmd_len) else AC_MSG_RESULT(none) fi max_cmd_len=$lt_cv_sys_max_cmd_len _LT_DECL([], [max_cmd_len], [0], [What is the maximum length of a command?]) ])# LT_CMD_MAX_LEN # Old name: AU_ALIAS([AC_LIBTOOL_SYS_MAX_CMD_LEN], [LT_CMD_MAX_LEN]) dnl aclocal-1.4 backwards compatibility: dnl AC_DEFUN([AC_LIBTOOL_SYS_MAX_CMD_LEN], []) # _LT_HEADER_DLFCN # ---------------- m4_defun([_LT_HEADER_DLFCN], [AC_CHECK_HEADERS([dlfcn.h], [], [], [AC_INCLUDES_DEFAULT])dnl ])# _LT_HEADER_DLFCN # _LT_TRY_DLOPEN_SELF (ACTION-IF-TRUE, ACTION-IF-TRUE-W-USCORE, # ACTION-IF-FALSE, ACTION-IF-CROSS-COMPILING) # ---------------------------------------------------------------- m4_defun([_LT_TRY_DLOPEN_SELF], [m4_require([_LT_HEADER_DLFCN])dnl if test yes = "$cross_compiling"; then : [$4] else lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2 lt_status=$lt_dlunknown cat > conftest.$ac_ext <<_LT_EOF [#line $LINENO "configure" #include "confdefs.h" #if HAVE_DLFCN_H #include #endif #include #ifdef RTLD_GLOBAL # define LT_DLGLOBAL RTLD_GLOBAL #else # ifdef DL_GLOBAL # define LT_DLGLOBAL DL_GLOBAL # else # define LT_DLGLOBAL 0 # endif #endif /* We may have to define LT_DLLAZY_OR_NOW in the command line if we find out it does not work in some platform. */ #ifndef LT_DLLAZY_OR_NOW # ifdef RTLD_LAZY # define LT_DLLAZY_OR_NOW RTLD_LAZY # else # ifdef DL_LAZY # define LT_DLLAZY_OR_NOW DL_LAZY # else # ifdef RTLD_NOW # define LT_DLLAZY_OR_NOW RTLD_NOW # else # ifdef DL_NOW # define LT_DLLAZY_OR_NOW DL_NOW # else # define LT_DLLAZY_OR_NOW 0 # endif # endif # endif # endif #endif /* When -fvisibility=hidden is used, assume the code has been annotated correspondingly for the symbols needed. */ #if defined __GNUC__ && (((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)) || (__GNUC__ > 3)) int fnord () __attribute__((visibility("default"))); #endif int fnord () { return 42; } int main () { void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW); int status = $lt_dlunknown; if (self) { if (dlsym (self,"fnord")) status = $lt_dlno_uscore; else { if (dlsym( self,"_fnord")) status = $lt_dlneed_uscore; else puts (dlerror ()); } /* dlclose (self); */ } else puts (dlerror ()); return status; }] _LT_EOF if AC_TRY_EVAL(ac_link) && test -s "conftest$ac_exeext" 2>/dev/null; then (./conftest; exit; ) >&AS_MESSAGE_LOG_FD 2>/dev/null lt_status=$? case x$lt_status in x$lt_dlno_uscore) $1 ;; x$lt_dlneed_uscore) $2 ;; x$lt_dlunknown|x*) $3 ;; esac else : # compilation failed $3 fi fi rm -fr conftest* ])# _LT_TRY_DLOPEN_SELF # LT_SYS_DLOPEN_SELF # ------------------ AC_DEFUN([LT_SYS_DLOPEN_SELF], [m4_require([_LT_HEADER_DLFCN])dnl if test yes != "$enable_dlopen"; then enable_dlopen=unknown enable_dlopen_self=unknown enable_dlopen_self_static=unknown else lt_cv_dlopen=no lt_cv_dlopen_libs= case $host_os in beos*) lt_cv_dlopen=load_add_on lt_cv_dlopen_libs= lt_cv_dlopen_self=yes ;; mingw* | pw32* | cegcc*) lt_cv_dlopen=LoadLibrary lt_cv_dlopen_libs= ;; cygwin*) lt_cv_dlopen=dlopen lt_cv_dlopen_libs= ;; darwin*) # if libdl is installed we need to link against it AC_CHECK_LIB([dl], [dlopen], [lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl],[ lt_cv_dlopen=dyld lt_cv_dlopen_libs= lt_cv_dlopen_self=yes ]) ;; tpf*) # Don't try to run any link tests for TPF. We know it's impossible # because TPF is a cross-compiler, and we know how we open DSOs. lt_cv_dlopen=dlopen lt_cv_dlopen_libs= lt_cv_dlopen_self=no ;; *) AC_CHECK_FUNC([shl_load], [lt_cv_dlopen=shl_load], [AC_CHECK_LIB([dld], [shl_load], [lt_cv_dlopen=shl_load lt_cv_dlopen_libs=-ldld], [AC_CHECK_FUNC([dlopen], [lt_cv_dlopen=dlopen], [AC_CHECK_LIB([dl], [dlopen], [lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl], [AC_CHECK_LIB([svld], [dlopen], [lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-lsvld], [AC_CHECK_LIB([dld], [dld_link], [lt_cv_dlopen=dld_link lt_cv_dlopen_libs=-ldld]) ]) ]) ]) ]) ]) ;; esac if test no = "$lt_cv_dlopen"; then enable_dlopen=no else enable_dlopen=yes fi case $lt_cv_dlopen in dlopen) save_CPPFLAGS=$CPPFLAGS test yes = "$ac_cv_header_dlfcn_h" && CPPFLAGS="$CPPFLAGS -DHAVE_DLFCN_H" save_LDFLAGS=$LDFLAGS wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $export_dynamic_flag_spec\" save_LIBS=$LIBS LIBS="$lt_cv_dlopen_libs $LIBS" AC_CACHE_CHECK([whether a program can dlopen itself], lt_cv_dlopen_self, [dnl _LT_TRY_DLOPEN_SELF( lt_cv_dlopen_self=yes, lt_cv_dlopen_self=yes, lt_cv_dlopen_self=no, lt_cv_dlopen_self=cross) ]) if test yes = "$lt_cv_dlopen_self"; then wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $lt_prog_compiler_static\" AC_CACHE_CHECK([whether a statically linked program can dlopen itself], lt_cv_dlopen_self_static, [dnl _LT_TRY_DLOPEN_SELF( lt_cv_dlopen_self_static=yes, lt_cv_dlopen_self_static=yes, lt_cv_dlopen_self_static=no, lt_cv_dlopen_self_static=cross) ]) fi CPPFLAGS=$save_CPPFLAGS LDFLAGS=$save_LDFLAGS LIBS=$save_LIBS ;; esac case $lt_cv_dlopen_self in yes|no) enable_dlopen_self=$lt_cv_dlopen_self ;; *) enable_dlopen_self=unknown ;; esac case $lt_cv_dlopen_self_static in yes|no) enable_dlopen_self_static=$lt_cv_dlopen_self_static ;; *) enable_dlopen_self_static=unknown ;; esac fi _LT_DECL([dlopen_support], [enable_dlopen], [0], [Whether dlopen is supported]) _LT_DECL([dlopen_self], [enable_dlopen_self], [0], [Whether dlopen of programs is supported]) _LT_DECL([dlopen_self_static], [enable_dlopen_self_static], [0], [Whether dlopen of statically linked programs is supported]) ])# LT_SYS_DLOPEN_SELF # Old name: AU_ALIAS([AC_LIBTOOL_DLOPEN_SELF], [LT_SYS_DLOPEN_SELF]) dnl aclocal-1.4 backwards compatibility: dnl AC_DEFUN([AC_LIBTOOL_DLOPEN_SELF], []) # _LT_COMPILER_C_O([TAGNAME]) # --------------------------- # Check to see if options -c and -o are simultaneously supported by compiler. # This macro does not hard code the compiler like AC_PROG_CC_C_O. m4_defun([_LT_COMPILER_C_O], [m4_require([_LT_DECL_SED])dnl m4_require([_LT_FILEUTILS_DEFAULTS])dnl m4_require([_LT_TAG_COMPILER])dnl AC_CACHE_CHECK([if $compiler supports -c -o file.$ac_objext], [_LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)], [_LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)=no $RM -r conftest 2>/dev/null mkdir conftest cd conftest mkdir out echo "$lt_simple_compile_test_code" > conftest.$ac_ext lt_compiler_flag="-o out/conftest2.$ac_objext" # Insert the option either (1) after the last *FLAGS variable, or # (2) before a word containing "conftest.", or (3) at the end. # Note that $ac_compile itself does not contain backslashes and begins # with a dollar sign (not a hyphen), so the echo should work correctly. lt_compile=`echo "$ac_compile" | $SED \ -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \ -e 's: [[^ ]]*conftest\.: $lt_compiler_flag&:; t' \ -e 's:$: $lt_compiler_flag:'` (eval echo "\"\$as_me:$LINENO: $lt_compile\"" >&AS_MESSAGE_LOG_FD) (eval "$lt_compile" 2>out/conftest.err) ac_status=$? cat out/conftest.err >&AS_MESSAGE_LOG_FD echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD if (exit $ac_status) && test -s out/conftest2.$ac_objext then # The compiler can only warn and ignore the option if not recognized # So say no if there are warnings $ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' > out/conftest.exp $SED '/^$/d; /^ *+/d' out/conftest.err >out/conftest.er2 if test ! -s out/conftest.er2 || diff out/conftest.exp out/conftest.er2 >/dev/null; then _LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)=yes fi fi chmod u+w . 2>&AS_MESSAGE_LOG_FD $RM conftest* # SGI C++ compiler will create directory out/ii_files/ for # template instantiation test -d out/ii_files && $RM out/ii_files/* && rmdir out/ii_files $RM out/* && rmdir out cd .. $RM -r conftest $RM conftest* ]) _LT_TAGDECL([compiler_c_o], [lt_cv_prog_compiler_c_o], [1], [Does compiler simultaneously support -c and -o options?]) ])# _LT_COMPILER_C_O # _LT_COMPILER_FILE_LOCKS([TAGNAME]) # ---------------------------------- # Check to see if we can do hard links to lock some files if needed m4_defun([_LT_COMPILER_FILE_LOCKS], [m4_require([_LT_ENABLE_LOCK])dnl m4_require([_LT_FILEUTILS_DEFAULTS])dnl _LT_COMPILER_C_O([$1]) hard_links=nottested if test no = "$_LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)" && test no != "$need_locks"; then # do not overwrite the value of need_locks provided by the user AC_MSG_CHECKING([if we can lock with hard links]) hard_links=yes $RM conftest* ln conftest.a conftest.b 2>/dev/null && hard_links=no touch conftest.a ln conftest.a conftest.b 2>&5 || hard_links=no ln conftest.a conftest.b 2>/dev/null && hard_links=no AC_MSG_RESULT([$hard_links]) if test no = "$hard_links"; then AC_MSG_WARN(['$CC' does not support '-c -o', so 'make -j' may be unsafe]) need_locks=warn fi else need_locks=no fi _LT_DECL([], [need_locks], [1], [Must we lock files when doing compilation?]) ])# _LT_COMPILER_FILE_LOCKS # _LT_CHECK_OBJDIR # ---------------- m4_defun([_LT_CHECK_OBJDIR], [AC_CACHE_CHECK([for objdir], [lt_cv_objdir], [rm -f .libs 2>/dev/null mkdir .libs 2>/dev/null if test -d .libs; then lt_cv_objdir=.libs else # MS-DOS does not allow filenames that begin with a dot. lt_cv_objdir=_libs fi rmdir .libs 2>/dev/null]) objdir=$lt_cv_objdir _LT_DECL([], [objdir], [0], [The name of the directory that contains temporary libtool files])dnl m4_pattern_allow([LT_OBJDIR])dnl AC_DEFINE_UNQUOTED([LT_OBJDIR], "$lt_cv_objdir/", [Define to the sub-directory where libtool stores uninstalled libraries.]) ])# _LT_CHECK_OBJDIR # _LT_LINKER_HARDCODE_LIBPATH([TAGNAME]) # -------------------------------------- # Check hardcoding attributes. m4_defun([_LT_LINKER_HARDCODE_LIBPATH], [AC_MSG_CHECKING([how to hardcode library paths into programs]) _LT_TAGVAR(hardcode_action, $1)= if test -n "$_LT_TAGVAR(hardcode_libdir_flag_spec, $1)" || test -n "$_LT_TAGVAR(runpath_var, $1)" || test yes = "$_LT_TAGVAR(hardcode_automatic, $1)"; then # We can hardcode non-existent directories. if test no != "$_LT_TAGVAR(hardcode_direct, $1)" && # If the only mechanism to avoid hardcoding is shlibpath_var, we # have to relink, otherwise we might link with an installed library # when we should be linking with a yet-to-be-installed one ## test no != "$_LT_TAGVAR(hardcode_shlibpath_var, $1)" && test no != "$_LT_TAGVAR(hardcode_minus_L, $1)"; then # Linking always hardcodes the temporary library directory. _LT_TAGVAR(hardcode_action, $1)=relink else # We can link without hardcoding, and we can hardcode nonexisting dirs. _LT_TAGVAR(hardcode_action, $1)=immediate fi else # We cannot hardcode anything, or else we can only hardcode existing # directories. _LT_TAGVAR(hardcode_action, $1)=unsupported fi AC_MSG_RESULT([$_LT_TAGVAR(hardcode_action, $1)]) if test relink = "$_LT_TAGVAR(hardcode_action, $1)" || test yes = "$_LT_TAGVAR(inherit_rpath, $1)"; then # Fast installation is not supported enable_fast_install=no elif test yes = "$shlibpath_overrides_runpath" || test no = "$enable_shared"; 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esac # HP-UX runs *really* slowly unless shared libraries are mode 555, ... postinstall_cmds='chmod 555 $lib' # or fails outright, so override atomically: install_override_mode=555 ;; interix[[3-9]]*) version_type=linux # correct to gnu/linux during the next big refactor need_lib_prefix=no need_version=no library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$shared_ext' soname_spec='$libname$release$shared_ext$major' dynamic_linker='Interix 3.x ld.so.1 (PE, like ELF)' shlibpath_var=LD_LIBRARY_PATH shlibpath_overrides_runpath=no hardcode_into_libs=yes ;; irix5* | irix6* | nonstopux*) case $host_os in nonstopux*) version_type=nonstopux ;; *) if test yes = "$lt_cv_prog_gnu_ld"; then version_type=linux # correct to gnu/linux during the next big refactor else version_type=irix fi ;; esac need_lib_prefix=no need_version=no soname_spec='$libname$release$shared_ext$major' library_names_spec='$libname$release$shared_ext$versuffix $libname$release$shared_ext$major $libname$release$shared_ext $libname$shared_ext' case $host_os in irix5* | nonstopux*) libsuff= shlibsuff= ;; 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then MANIFEST_TOOL=: fi _LT_DECL([], [MANIFEST_TOOL], [1], [Manifest tool])dnl ])# _LT_PATH_MANIFEST_TOOL # _LT_DLL_DEF_P([FILE]) # --------------------- # True iff FILE is a Windows DLL '.def' file. # Keep in sync with func_dll_def_p in the libtool script AC_DEFUN([_LT_DLL_DEF_P], [dnl test DEF = "`$SED -n dnl -e '\''s/^[[ ]]*//'\'' dnl Strip leading whitespace -e '\''/^\(;.*\)*$/d'\'' dnl Delete empty lines and comments -e '\''s/^\(EXPORTS\|LIBRARY\)\([[ ]].*\)*$/DEF/p'\'' dnl -e q dnl Only consider the first "real" line $1`" dnl ])# _LT_DLL_DEF_P # LT_LIB_M # -------- # check for math library AC_DEFUN([LT_LIB_M], [AC_REQUIRE([AC_CANONICAL_HOST])dnl LIBM= case $host in *-*-beos* | *-*-cegcc* | *-*-cygwin* | *-*-haiku* | *-*-pw32* | *-*-darwin*) # These system don't have libm, or don't need it ;; *-ncr-sysv4.3*) AC_CHECK_LIB(mw, _mwvalidcheckl, LIBM=-lmw) AC_CHECK_LIB(m, cos, LIBM="$LIBM -lm") ;; *) AC_CHECK_LIB(m, cos, LIBM=-lm) ;; esac AC_SUBST([LIBM]) ])# LT_LIB_M # Old name: AU_ALIAS([AC_CHECK_LIBM], [LT_LIB_M]) dnl aclocal-1.4 backwards compatibility: dnl AC_DEFUN([AC_CHECK_LIBM], []) # _LT_COMPILER_NO_RTTI([TAGNAME]) # ------------------------------- m4_defun([_LT_COMPILER_NO_RTTI], [m4_require([_LT_TAG_COMPILER])dnl _LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)= if test yes = "$GCC"; 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What could be older than Ultrix?!! ;)] # Character class describing NM global symbol codes. symcode='[[BCDEGRST]]' # Regexp to match symbols that can be accessed directly from C. sympat='\([[_A-Za-z]][[_A-Za-z0-9]]*\)' # Define system-specific variables. case $host_os in aix*) symcode='[[BCDT]]' ;; cygwin* | mingw* | pw32* | cegcc*) symcode='[[ABCDGISTW]]' ;; hpux*) if test ia64 = "$host_cpu"; then symcode='[[ABCDEGRST]]' fi ;; irix* | nonstopux*) symcode='[[BCDEGRST]]' ;; osf*) symcode='[[BCDEGQRST]]' ;; solaris*) symcode='[[BDRT]]' ;; sco3.2v5*) symcode='[[DT]]' ;; sysv4.2uw2*) symcode='[[DT]]' ;; sysv5* | sco5v6* | unixware* | OpenUNIX*) symcode='[[ABDT]]' ;; sysv4) symcode='[[DFNSTU]]' ;; esac # If we're using GNU nm, then use its standard symbol codes. case `$NM -V 2>&1` in *GNU* | *'with BFD'*) symcode='[[ABCDGIRSTW]]' ;; esac if test "$lt_cv_nm_interface" = "MS dumpbin"; then # Gets list of data symbols to import. lt_cv_sys_global_symbol_to_import="sed -n -e 's/^I .* \(.*\)$/\1/p'" # Adjust the below global symbol transforms to fixup imported variables. lt_cdecl_hook=" -e 's/^I .* \(.*\)$/extern __declspec(dllimport) char \1;/p'" lt_c_name_hook=" -e 's/^I .* \(.*\)$/ {\"\1\", (void *) 0},/p'" lt_c_name_lib_hook="\ -e 's/^I .* \(lib.*\)$/ {\"\1\", (void *) 0},/p'\ -e 's/^I .* \(.*\)$/ {\"lib\1\", (void *) 0},/p'" else # Disable hooks by default. lt_cv_sys_global_symbol_to_import= lt_cdecl_hook= lt_c_name_hook= lt_c_name_lib_hook= fi # Transform an extracted symbol line into a proper C declaration. # Some systems (esp. on ia64) link data and code symbols differently, # so use this general approach. lt_cv_sys_global_symbol_to_cdecl="sed -n"\ $lt_cdecl_hook\ " -e 's/^T .* \(.*\)$/extern int \1();/p'"\ " -e 's/^$symcode$symcode* .* \(.*\)$/extern char \1;/p'" # Transform an extracted symbol line into symbol name and symbol address lt_cv_sys_global_symbol_to_c_name_address="sed -n"\ $lt_c_name_hook\ " -e 's/^: \(.*\) .*$/ {\"\1\", (void *) 0},/p'"\ " -e 's/^$symcode$symcode* .* \(.*\)$/ {\"\1\", (void *) \&\1},/p'" # Transform an extracted symbol line into symbol name with lib prefix and # symbol address. lt_cv_sys_global_symbol_to_c_name_address_lib_prefix="sed -n"\ $lt_c_name_lib_hook\ " -e 's/^: \(.*\) .*$/ {\"\1\", (void *) 0},/p'"\ " -e 's/^$symcode$symcode* .* \(lib.*\)$/ {\"\1\", (void *) \&\1},/p'"\ " -e 's/^$symcode$symcode* .* \(.*\)$/ {\"lib\1\", (void *) \&\1},/p'" # Handle CRLF in mingw tool chain opt_cr= case $build_os in mingw*) opt_cr=`$ECHO 'x\{0,1\}' | tr x '\015'` # option cr in regexp ;; esac # Try without a prefix underscore, then with it. for ac_symprfx in "" "_"; do # Transform symcode, sympat, and symprfx into a raw symbol and a C symbol. symxfrm="\\1 $ac_symprfx\\2 \\2" # Write the raw and C identifiers. if test "$lt_cv_nm_interface" = "MS dumpbin"; then # Fake it for dumpbin and say T for any non-static function, # D for any global variable and I for any imported variable. # Also find C++ and __fastcall symbols from MSVC++, # which start with @ or ?. lt_cv_sys_global_symbol_pipe="$AWK ['"\ " {last_section=section; section=\$ 3};"\ " /^COFF SYMBOL TABLE/{for(i in hide) delete hide[i]};"\ " /Section length .*#relocs.*(pick any)/{hide[last_section]=1};"\ " /^ *Symbol name *: /{split(\$ 0,sn,\":\"); si=substr(sn[2],2)};"\ " /^ *Type *: code/{print \"T\",si,substr(si,length(prfx))};"\ " /^ *Type *: data/{print \"I\",si,substr(si,length(prfx))};"\ " \$ 0!~/External *\|/{next};"\ " / 0+ UNDEF /{next}; / UNDEF \([^|]\)*()/{next};"\ " {if(hide[section]) next};"\ " {f=\"D\"}; \$ 0~/\(\).*\|/{f=\"T\"};"\ " {split(\$ 0,a,/\||\r/); split(a[2],s)};"\ " s[1]~/^[@?]/{print f,s[1],s[1]; next};"\ " s[1]~prfx {split(s[1],t,\"@\"); print f,t[1],substr(t[1],length(prfx))}"\ " ' prfx=^$ac_symprfx]" else lt_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[[ ]]\($symcode$symcode*\)[[ ]][[ ]]*$ac_symprfx$sympat$opt_cr$/$symxfrm/p'" fi lt_cv_sys_global_symbol_pipe="$lt_cv_sys_global_symbol_pipe | sed '/ __gnu_lto/d'" # Check to see that the pipe works correctly. pipe_works=no rm -f conftest* cat > conftest.$ac_ext <<_LT_EOF #ifdef __cplusplus extern "C" { #endif char nm_test_var; void nm_test_func(void); void nm_test_func(void){} #ifdef __cplusplus } #endif int main(){nm_test_var='a';nm_test_func();return(0);} _LT_EOF if AC_TRY_EVAL(ac_compile); then # Now try to grab the symbols. nlist=conftest.nm $ECHO "$as_me:$LINENO: $NM conftest.$ac_objext | $lt_cv_sys_global_symbol_pipe > $nlist" >&AS_MESSAGE_LOG_FD if eval "$NM" conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist 2>&AS_MESSAGE_LOG_FD && test -s "$nlist"; then # Try sorting and uniquifying the output. if sort "$nlist" | uniq > "$nlist"T; then mv -f "$nlist"T "$nlist" else rm -f "$nlist"T fi # Make sure that we snagged all the symbols we need. if $GREP ' nm_test_var$' "$nlist" >/dev/null; then if $GREP ' nm_test_func$' "$nlist" >/dev/null; then cat <<_LT_EOF > conftest.$ac_ext /* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and tests. */ #if defined _WIN32 || defined __CYGWIN__ || defined _WIN32_WCE /* DATA imports from DLLs on WIN32 can't be const, because runtime relocations are performed -- see ld's documentation on pseudo-relocs. */ # define LT@&t@_DLSYM_CONST #elif defined __osf__ /* This system does not cope well with relocations in const data. */ # define LT@&t@_DLSYM_CONST #else # define LT@&t@_DLSYM_CONST const #endif #ifdef __cplusplus extern "C" { #endif _LT_EOF # Now generate the symbol file. eval "$lt_cv_sys_global_symbol_to_cdecl"' < "$nlist" | $GREP -v main >> conftest.$ac_ext' cat <<_LT_EOF >> conftest.$ac_ext /* The mapping between symbol names and symbols. */ LT@&t@_DLSYM_CONST struct { const char *name; void *address; } lt__PROGRAM__LTX_preloaded_symbols[[]] = { { "@PROGRAM@", (void *) 0 }, _LT_EOF $SED "s/^$symcode$symcode* .* \(.*\)$/ {\"\1\", (void *) \&\1},/" < "$nlist" | $GREP -v main >> conftest.$ac_ext cat <<\_LT_EOF >> conftest.$ac_ext {0, (void *) 0} }; /* This works around a problem in FreeBSD linker */ #ifdef FREEBSD_WORKAROUND static const void *lt_preloaded_setup() { return lt__PROGRAM__LTX_preloaded_symbols; } #endif #ifdef __cplusplus } #endif _LT_EOF # Now try linking the two files. mv conftest.$ac_objext conftstm.$ac_objext lt_globsym_save_LIBS=$LIBS lt_globsym_save_CFLAGS=$CFLAGS LIBS=conftstm.$ac_objext CFLAGS="$CFLAGS$_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)" if AC_TRY_EVAL(ac_link) && test -s conftest$ac_exeext; then pipe_works=yes fi LIBS=$lt_globsym_save_LIBS CFLAGS=$lt_globsym_save_CFLAGS else echo "cannot find nm_test_func in $nlist" >&AS_MESSAGE_LOG_FD fi else echo "cannot find nm_test_var in $nlist" >&AS_MESSAGE_LOG_FD fi else echo "cannot run $lt_cv_sys_global_symbol_pipe" >&AS_MESSAGE_LOG_FD fi else echo "$progname: failed program was:" >&AS_MESSAGE_LOG_FD cat conftest.$ac_ext >&5 fi rm -rf conftest* conftst* # Do not use the global_symbol_pipe unless it works. if test yes = "$pipe_works"; then break else lt_cv_sys_global_symbol_pipe= fi done ]) if test -z "$lt_cv_sys_global_symbol_pipe"; then lt_cv_sys_global_symbol_to_cdecl= fi if test -z "$lt_cv_sys_global_symbol_pipe$lt_cv_sys_global_symbol_to_cdecl"; then AC_MSG_RESULT(failed) else AC_MSG_RESULT(ok) fi # Response file support. if test "$lt_cv_nm_interface" = "MS dumpbin"; then nm_file_list_spec='@' elif $NM --help 2>/dev/null | grep '[[@]]FILE' >/dev/null; then nm_file_list_spec='@' fi _LT_DECL([global_symbol_pipe], [lt_cv_sys_global_symbol_pipe], [1], [Take the output of nm and produce a listing of raw symbols and C names]) _LT_DECL([global_symbol_to_cdecl], [lt_cv_sys_global_symbol_to_cdecl], [1], [Transform the output of nm in a proper C declaration]) _LT_DECL([global_symbol_to_import], [lt_cv_sys_global_symbol_to_import], [1], [Transform the output of nm into a list of symbols to manually relocate]) _LT_DECL([global_symbol_to_c_name_address], [lt_cv_sys_global_symbol_to_c_name_address], [1], [Transform the output of nm in a C name address pair]) _LT_DECL([global_symbol_to_c_name_address_lib_prefix], [lt_cv_sys_global_symbol_to_c_name_address_lib_prefix], [1], [Transform the output of nm in a C name address pair when lib prefix is needed]) _LT_DECL([nm_interface], [lt_cv_nm_interface], [1], [The name lister interface]) _LT_DECL([], [nm_file_list_spec], [1], [Specify filename containing input files for $NM]) ]) # _LT_CMD_GLOBAL_SYMBOLS # _LT_COMPILER_PIC([TAGNAME]) # --------------------------- m4_defun([_LT_COMPILER_PIC], [m4_require([_LT_TAG_COMPILER])dnl _LT_TAGVAR(lt_prog_compiler_wl, $1)= _LT_TAGVAR(lt_prog_compiler_pic, $1)= _LT_TAGVAR(lt_prog_compiler_static, $1)= m4_if([$1], [CXX], [ # C++ specific cases for pic, static, wl, etc. if test yes = "$GXX"; then _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' case $host_os in aix*) # All AIX code is PIC. if test ia64 = "$host_cpu"; then # AIX 5 now supports IA64 processor _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' fi _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; amigaos*) case $host_cpu in powerpc) # see comment about AmigaOS4 .so support _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; m68k) # FIXME: we need at least 68020 code to build shared libraries, but # adding the '-m68020' flag to GCC prevents building anything better, # like '-m68040'. _LT_TAGVAR(lt_prog_compiler_pic, $1)='-m68020 -resident32 -malways-restore-a4' ;; esac ;; beos* | irix5* | irix6* | nonstopux* | osf3* | osf4* | osf5*) # PIC is the default for these OSes. ;; mingw* | cygwin* | os2* | pw32* | cegcc*) # This hack is so that the source file can tell whether it is being # built for inclusion in a dll (and should export symbols for example). # Although the cygwin gcc ignores -fPIC, still need this for old-style # (--disable-auto-import) libraries m4_if([$1], [GCJ], [], [_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT']) case $host_os in os2*) _LT_TAGVAR(lt_prog_compiler_static, $1)='$wl-static' ;; esac ;; darwin* | rhapsody*) # PIC is the default on this platform # Common symbols not allowed in MH_DYLIB files _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fno-common' ;; *djgpp*) # DJGPP does not support shared libraries at all _LT_TAGVAR(lt_prog_compiler_pic, $1)= ;; haiku*) # PIC is the default for Haiku. # The "-static" flag exists, but is broken. _LT_TAGVAR(lt_prog_compiler_static, $1)= ;; interix[[3-9]]*) # Interix 3.x gcc -fpic/-fPIC options generate broken code. # Instead, we relocate shared libraries at runtime. ;; sysv4*MP*) if test -d /usr/nec; then _LT_TAGVAR(lt_prog_compiler_pic, $1)=-Kconform_pic fi ;; hpux*) # PIC is the default for 64-bit PA HP-UX, but not for 32-bit # PA HP-UX. On IA64 HP-UX, PIC is the default but the pic flag # sets the default TLS model and affects inlining. case $host_cpu in hppa*64*) ;; *) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; esac ;; *qnx* | *nto*) # QNX uses GNU C++, but need to define -shared option too, otherwise # it will coredump. _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared' ;; *) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; esac else case $host_os in aix[[4-9]]*) # All AIX code is PIC. if test ia64 = "$host_cpu"; then # AIX 5 now supports IA64 processor _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' else _LT_TAGVAR(lt_prog_compiler_static, $1)='-bnso -bI:/lib/syscalls.exp' fi ;; chorus*) case $cc_basename in cxch68*) # Green Hills C++ Compiler # _LT_TAGVAR(lt_prog_compiler_static, $1)="--no_auto_instantiation -u __main -u __premain -u _abort -r $COOL_DIR/lib/libOrb.a $MVME_DIR/lib/CC/libC.a $MVME_DIR/lib/classix/libcx.s.a" ;; esac ;; mingw* | cygwin* | os2* | pw32* | cegcc*) # This hack is so that the source file can tell whether it is being # built for inclusion in a dll (and should export symbols for example). m4_if([$1], [GCJ], [], [_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT']) ;; dgux*) case $cc_basename in ec++*) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' ;; ghcx*) # Green Hills C++ Compiler _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' ;; *) ;; esac ;; freebsd* | dragonfly*) # FreeBSD uses GNU C++ ;; hpux9* | hpux10* | hpux11*) case $cc_basename in CC*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_static, $1)='$wl-a ${wl}archive' if test ia64 != "$host_cpu"; then _LT_TAGVAR(lt_prog_compiler_pic, $1)='+Z' fi ;; aCC*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_static, $1)='$wl-a ${wl}archive' case $host_cpu in hppa*64*|ia64*) # +Z the default ;; *) _LT_TAGVAR(lt_prog_compiler_pic, $1)='+Z' ;; esac ;; *) ;; esac ;; interix*) # This is c89, which is MS Visual C++ (no shared libs) # Anyone wants to do a port? ;; irix5* | irix6* | nonstopux*) case $cc_basename in CC*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' # CC pic flag -KPIC is the default. ;; *) ;; esac ;; linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*) case $cc_basename in KCC*) # KAI C++ Compiler _LT_TAGVAR(lt_prog_compiler_wl, $1)='--backend -Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; ecpc* ) # old Intel C++ for x86_64, which still supported -KPIC. _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' ;; icpc* ) # Intel C++, used to be incompatible with GCC. # ICC 10 doesn't accept -KPIC any more. _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' ;; pgCC* | pgcpp*) # Portland Group C++ compiler _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fpic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; cxx*) # Compaq C++ # Make sure the PIC flag is empty. It appears that all Alpha # Linux and Compaq Tru64 Unix objects are PIC. _LT_TAGVAR(lt_prog_compiler_pic, $1)= _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' ;; xlc* | xlC* | bgxl[[cC]]* | mpixl[[cC]]*) # IBM XL 8.0, 9.0 on PPC and BlueGene _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-qpic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-qstaticlink' ;; *) case `$CC -V 2>&1 | sed 5q` in *Sun\ C*) # Sun C++ 5.9 _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ' ;; esac ;; esac ;; lynxos*) ;; m88k*) ;; mvs*) case $cc_basename in cxx*) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-W c,exportall' ;; *) ;; esac ;; netbsd* | netbsdelf*-gnu) ;; *qnx* | *nto*) # QNX uses GNU C++, but need to define -shared option too, otherwise # it will coredump. _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared' ;; osf3* | osf4* | osf5*) case $cc_basename in KCC*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='--backend -Wl,' ;; RCC*) # Rational C++ 2.4.1 _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' ;; cxx*) # Digital/Compaq C++ _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' # Make sure the PIC flag is empty. It appears that all Alpha # Linux and Compaq Tru64 Unix objects are PIC. _LT_TAGVAR(lt_prog_compiler_pic, $1)= _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' ;; *) ;; esac ;; psos*) ;; solaris*) case $cc_basename in CC* | sunCC*) # Sun C++ 4.2, 5.x and Centerline C++ _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ' ;; gcx*) # Green Hills C++ Compiler _LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC' ;; *) ;; esac ;; sunos4*) case $cc_basename in CC*) # Sun C++ 4.x _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; lcc*) # Lucid _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' ;; *) ;; esac ;; sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*) case $cc_basename in CC*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; esac ;; tandem*) case $cc_basename in NCC*) # NonStop-UX NCC 3.20 _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' ;; *) ;; esac ;; vxworks*) ;; *) _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no ;; esac fi ], [ if test yes = "$GCC"; then _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' case $host_os in aix*) # All AIX code is PIC. if test ia64 = "$host_cpu"; then # AIX 5 now supports IA64 processor _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' fi _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; amigaos*) case $host_cpu in powerpc) # see comment about AmigaOS4 .so support _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; m68k) # FIXME: we need at least 68020 code to build shared libraries, but # adding the '-m68020' flag to GCC prevents building anything better, # like '-m68040'. _LT_TAGVAR(lt_prog_compiler_pic, $1)='-m68020 -resident32 -malways-restore-a4' ;; esac ;; beos* | irix5* | irix6* | nonstopux* | osf3* | osf4* | osf5*) # PIC is the default for these OSes. ;; mingw* | cygwin* | pw32* | os2* | cegcc*) # This hack is so that the source file can tell whether it is being # built for inclusion in a dll (and should export symbols for example). # Although the cygwin gcc ignores -fPIC, still need this for old-style # (--disable-auto-import) libraries m4_if([$1], [GCJ], [], [_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT']) case $host_os in os2*) _LT_TAGVAR(lt_prog_compiler_static, $1)='$wl-static' ;; esac ;; darwin* | rhapsody*) # PIC is the default on this platform # Common symbols not allowed in MH_DYLIB files _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fno-common' ;; haiku*) # PIC is the default for Haiku. # The "-static" flag exists, but is broken. _LT_TAGVAR(lt_prog_compiler_static, $1)= ;; hpux*) # PIC is the default for 64-bit PA HP-UX, but not for 32-bit # PA HP-UX. On IA64 HP-UX, PIC is the default but the pic flag # sets the default TLS model and affects inlining. case $host_cpu in hppa*64*) # +Z the default ;; *) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; esac ;; interix[[3-9]]*) # Interix 3.x gcc -fpic/-fPIC options generate broken code. # Instead, we relocate shared libraries at runtime. ;; msdosdjgpp*) # Just because we use GCC doesn't mean we suddenly get shared libraries # on systems that don't support them. _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no enable_shared=no ;; *nto* | *qnx*) # QNX uses GNU C++, but need to define -shared option too, otherwise # it will coredump. _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared' ;; sysv4*MP*) if test -d /usr/nec; then _LT_TAGVAR(lt_prog_compiler_pic, $1)=-Kconform_pic fi ;; *) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' ;; esac case $cc_basename in nvcc*) # Cuda Compiler Driver 2.2 _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Xlinker ' if test -n "$_LT_TAGVAR(lt_prog_compiler_pic, $1)"; then _LT_TAGVAR(lt_prog_compiler_pic, $1)="-Xcompiler $_LT_TAGVAR(lt_prog_compiler_pic, $1)" fi ;; esac else # PORTME Check for flag to pass linker flags through the system compiler. case $host_os in aix*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' if test ia64 = "$host_cpu"; then # AIX 5 now supports IA64 processor _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' else _LT_TAGVAR(lt_prog_compiler_static, $1)='-bnso -bI:/lib/syscalls.exp' fi ;; darwin* | rhapsody*) # PIC is the default on this platform # Common symbols not allowed in MH_DYLIB files _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fno-common' case $cc_basename in nagfor*) # NAG Fortran compiler _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,-Wl,,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; esac ;; mingw* | cygwin* | pw32* | os2* | cegcc*) # This hack is so that the source file can tell whether it is being # built for inclusion in a dll (and should export symbols for example). m4_if([$1], [GCJ], [], [_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT']) case $host_os in os2*) _LT_TAGVAR(lt_prog_compiler_static, $1)='$wl-static' ;; esac ;; hpux9* | hpux10* | hpux11*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' # PIC is the default for IA64 HP-UX and 64-bit HP-UX, but # not for PA HP-UX. case $host_cpu in hppa*64*|ia64*) # +Z the default ;; *) _LT_TAGVAR(lt_prog_compiler_pic, $1)='+Z' ;; esac # Is there a better lt_prog_compiler_static that works with the bundled CC? _LT_TAGVAR(lt_prog_compiler_static, $1)='$wl-a ${wl}archive' ;; irix5* | irix6* | nonstopux*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' # PIC (with -KPIC) is the default. _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' ;; linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*) case $cc_basename in # old Intel for x86_64, which still supported -KPIC. ecc*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' ;; # icc used to be incompatible with GCC. # ICC 10 doesn't accept -KPIC any more. icc* | ifort*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' ;; # Lahey Fortran 8.1. lf95*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='--shared' _LT_TAGVAR(lt_prog_compiler_static, $1)='--static' ;; nagfor*) # NAG Fortran compiler _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,-Wl,,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; tcc*) # Fabrice Bellard et al's Tiny C Compiler _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' ;; pgcc* | pgf77* | pgf90* | pgf95* | pgfortran*) # Portland Group compilers (*not* the Pentium gcc compiler, # which looks to be a dead project) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fpic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; ccc*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' # All Alpha code is PIC. _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared' ;; xl* | bgxl* | bgf* | mpixl*) # IBM XL C 8.0/Fortran 10.1, 11.1 on PPC and BlueGene _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-qpic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-qstaticlink' ;; *) case `$CC -V 2>&1 | sed 5q` in *Sun\ Ceres\ Fortran* | *Sun*Fortran*\ [[1-7]].* | *Sun*Fortran*\ 8.[[0-3]]*) # Sun Fortran 8.3 passes all unrecognized flags to the linker _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' _LT_TAGVAR(lt_prog_compiler_wl, $1)='' ;; *Sun\ F* | *Sun*Fortran*) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ' ;; *Sun\ C*) # Sun C 5.9 _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' ;; *Intel*\ [[CF]]*Compiler*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-static' ;; *Portland\ Group*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fpic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; esac ;; esac ;; newsos6) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; 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then _LT_TAGVAR(lt_prog_compiler_pic, $1)='-Kconform_pic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' fi ;; sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; unicos*) _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,' _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no ;; uts4*) _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic' _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic' ;; *) _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no ;; esac fi ]) case $host_os in # For platforms that do not support PIC, -DPIC is meaningless: *djgpp*) _LT_TAGVAR(lt_prog_compiler_pic, $1)= ;; *) _LT_TAGVAR(lt_prog_compiler_pic, $1)="$_LT_TAGVAR(lt_prog_compiler_pic, $1)@&t@m4_if([$1],[],[ -DPIC],[m4_if([$1],[CXX],[ -DPIC],[])])" ;; esac AC_CACHE_CHECK([for $compiler option to produce PIC], [_LT_TAGVAR(lt_cv_prog_compiler_pic, $1)], [_LT_TAGVAR(lt_cv_prog_compiler_pic, $1)=$_LT_TAGVAR(lt_prog_compiler_pic, $1)]) _LT_TAGVAR(lt_prog_compiler_pic, $1)=$_LT_TAGVAR(lt_cv_prog_compiler_pic, $1) # # Check to make sure the PIC flag actually works. # if test -n "$_LT_TAGVAR(lt_prog_compiler_pic, $1)"; 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Moving up from 0x10000000 also allows more sbrk(2) space. _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-h,$soname $wl--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib' _LT_TAGVAR(archive_expsym_cmds, $1)='sed "s|^|_|" $export_symbols >$output_objdir/$soname.expsym~$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-h,$soname $wl--retain-symbols-file,$output_objdir/$soname.expsym $wl--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib' ;; gnu* | linux* | tpf* | k*bsd*-gnu | kopensolaris*-gnu) tmp_diet=no if test linux-dietlibc = "$host_os"; then case $cc_basename in diet\ *) tmp_diet=yes;; # linux-dietlibc with static linking (!diet-dyn) esac fi if $LD --help 2>&1 | $EGREP ': supported targets:.* elf' > /dev/null \ && test no = "$tmp_diet" then tmp_addflag=' $pic_flag' tmp_sharedflag='-shared' case $cc_basename,$host_cpu in pgcc*) # Portland Group C compiler _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive`for conv in $convenience\"\"; do test -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive' tmp_addflag=' $pic_flag' ;; pgf77* | pgf90* | pgf95* | pgfortran*) # Portland Group f77 and f90 compilers _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive`for conv in $convenience\"\"; do test -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive' tmp_addflag=' $pic_flag -Mnomain' ;; ecc*,ia64* | icc*,ia64*) # Intel C compiler on ia64 tmp_addflag=' -i_dynamic' ;; efc*,ia64* | ifort*,ia64*) # Intel Fortran compiler on ia64 tmp_addflag=' -i_dynamic -nofor_main' ;; ifc* | ifort*) # Intel Fortran compiler tmp_addflag=' -nofor_main' ;; lf95*) # Lahey Fortran 8.1 _LT_TAGVAR(whole_archive_flag_spec, $1)= tmp_sharedflag='--shared' ;; nagfor*) # NAGFOR 5.3 tmp_sharedflag='-Wl,-shared' ;; xl[[cC]]* | bgxl[[cC]]* | mpixl[[cC]]*) # IBM XL C 8.0 on PPC (deal with xlf below) tmp_sharedflag='-qmkshrobj' tmp_addflag= ;; nvcc*) # Cuda Compiler Driver 2.2 _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive`for conv in $convenience\"\"; do test -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive' _LT_TAGVAR(compiler_needs_object, $1)=yes ;; esac case `$CC -V 2>&1 | sed 5q` in *Sun\ C*) # Sun C 5.9 _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive`new_convenience=; for conv in $convenience\"\"; do test -z \"$conv\" || new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive' _LT_TAGVAR(compiler_needs_object, $1)=yes tmp_sharedflag='-G' ;; *Sun\ F*) # Sun Fortran 8.3 tmp_sharedflag='-G' ;; esac _LT_TAGVAR(archive_cmds, $1)='$CC '"$tmp_sharedflag""$tmp_addflag"' $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' if test yes = "$supports_anon_versioning"; then _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $output_objdir/$libname.ver~ cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~ echo "local: *; };" >> $output_objdir/$libname.ver~ $CC '"$tmp_sharedflag""$tmp_addflag"' $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-version-script $wl$output_objdir/$libname.ver -o $lib' fi case $cc_basename in tcc*) _LT_TAGVAR(export_dynamic_flag_spec, $1)='-rdynamic' ;; xlf* | bgf* | bgxlf* | mpixlf*) # IBM XL Fortran 10.1 on PPC cannot create shared libs itself _LT_TAGVAR(whole_archive_flag_spec, $1)='--whole-archive$convenience --no-whole-archive' _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath $wl$libdir' _LT_TAGVAR(archive_cmds, $1)='$LD -shared $libobjs $deplibs $linker_flags -soname $soname -o $lib' if test yes = "$supports_anon_versioning"; then _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $output_objdir/$libname.ver~ cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~ echo "local: *; };" >> $output_objdir/$libname.ver~ $LD -shared $libobjs $deplibs $linker_flags -soname $soname -version-script $output_objdir/$libname.ver -o $lib' fi ;; esac else _LT_TAGVAR(ld_shlibs, $1)=no fi ;; netbsd* | netbsdelf*-gnu) if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then _LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable $libobjs $deplibs $linker_flags -o $lib' wlarc= else _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib' fi ;; solaris*) if $LD -v 2>&1 | $GREP 'BFD 2\.8' > /dev/null; then _LT_TAGVAR(ld_shlibs, $1)=no cat <<_LT_EOF 1>&2 *** Warning: The releases 2.8.* of the GNU linker cannot reliably *** create shared libraries on Solaris systems. Therefore, libtool *** is disabling shared libraries support. We urge you to upgrade GNU *** binutils to release 2.9.1 or newer. Another option is to modify *** your PATH or compiler configuration so that the native linker is *** used, and then restart. _LT_EOF elif $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib' else _LT_TAGVAR(ld_shlibs, $1)=no fi ;; sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX*) case `$LD -v 2>&1` in *\ [[01]].* | *\ 2.[[0-9]].* | *\ 2.1[[0-5]].*) _LT_TAGVAR(ld_shlibs, $1)=no cat <<_LT_EOF 1>&2 *** Warning: Releases of the GNU linker prior to 2.16.91.0.3 cannot *** reliably create shared libraries on SCO systems. Therefore, libtool *** is disabling shared libraries support. We urge you to upgrade GNU *** binutils to release 2.16.91.0.3 or newer. Another option is to modify *** your PATH or compiler configuration so that the native linker is *** used, and then restart. _LT_EOF ;; *) # For security reasons, it is highly recommended that you always # use absolute paths for naming shared libraries, and exclude the # DT_RUNPATH tag from executables and libraries. But doing so # requires that you compile everything twice, which is a pain. if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath $wl$libdir' _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib' else _LT_TAGVAR(ld_shlibs, $1)=no fi ;; esac ;; sunos4*) _LT_TAGVAR(archive_cmds, $1)='$LD -assert pure-text -Bshareable -o $lib $libobjs $deplibs $linker_flags' wlarc= _LT_TAGVAR(hardcode_direct, $1)=yes _LT_TAGVAR(hardcode_shlibpath_var, $1)=no ;; *) if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib' else _LT_TAGVAR(ld_shlibs, $1)=no fi ;; esac if test no = "$_LT_TAGVAR(ld_shlibs, $1)"; then runpath_var= _LT_TAGVAR(hardcode_libdir_flag_spec, $1)= _LT_TAGVAR(export_dynamic_flag_spec, $1)= _LT_TAGVAR(whole_archive_flag_spec, $1)= fi else # PORTME fill in a description of your system's linker (not GNU ld) case $host_os in aix3*) _LT_TAGVAR(allow_undefined_flag, $1)=unsupported _LT_TAGVAR(always_export_symbols, $1)=yes _LT_TAGVAR(archive_expsym_cmds, $1)='$LD -o $output_objdir/$soname $libobjs $deplibs $linker_flags -bE:$export_symbols -T512 -H512 -bM:SRE~$AR $AR_FLAGS $lib $output_objdir/$soname' # Note: this linker hardcodes the directories in LIBPATH if there # are no directories specified by -L. _LT_TAGVAR(hardcode_minus_L, $1)=yes if test yes = "$GCC" && test -z "$lt_prog_compiler_static"; then # Neither direct hardcoding nor static linking is supported with a # broken collect2. _LT_TAGVAR(hardcode_direct, $1)=unsupported fi ;; aix[[4-9]]*) if test ia64 = "$host_cpu"; then # On IA64, the linker does run time linking by default, so we don't # have to do anything special. aix_use_runtimelinking=no exp_sym_flag='-Bexport' no_entry_flag= else # If we're using GNU nm, then we don't want the "-C" option. # -C means demangle to GNU nm, but means don't demangle to AIX nm. # Without the "-l" option, or with the "-B" option, AIX nm treats # weak defined symbols like other global defined symbols, whereas # GNU nm marks them as "W". # While the 'weak' keyword is ignored in the Export File, we need # it in the Import File for the 'aix-soname' feature, so we have # to replace the "-B" option with "-P" for AIX nm. if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then _LT_TAGVAR(export_symbols_cmds, $1)='$NM -Bpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W")) && ([substr](\$ 3,1,1) != ".")) { if (\$ 2 == "W") { print \$ 3 " weak" } else { print \$ 3 } } }'\'' | sort -u > $export_symbols' else _LT_TAGVAR(export_symbols_cmds, $1)='`func_echo_all $NM | $SED -e '\''s/B\([[^B]]*\)$/P\1/'\''` -PCpgl $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B") || (\$ 2 == "W") || (\$ 2 == "V") || (\$ 2 == "Z")) && ([substr](\$ 1,1,1) != ".")) { if ((\$ 2 == "W") || (\$ 2 == "V") || (\$ 2 == "Z")) { print \$ 1 " weak" } else { print \$ 1 } } }'\'' | sort -u > $export_symbols' fi aix_use_runtimelinking=no # Test if we are trying to use run time linking or normal # AIX style linking. If -brtl is somewhere in LDFLAGS, we # have runtime linking enabled, and use it for executables. # For shared libraries, we enable/disable runtime linking # depending on the kind of the shared library created - # when "with_aix_soname,aix_use_runtimelinking" is: # "aix,no" lib.a(lib.so.V) shared, rtl:no, for executables # "aix,yes" lib.so shared, rtl:yes, for executables # lib.a static archive # "both,no" lib.so.V(shr.o) shared, rtl:yes # lib.a(lib.so.V) shared, rtl:no, for executables # "both,yes" lib.so.V(shr.o) shared, rtl:yes, for executables # lib.a(lib.so.V) shared, rtl:no # "svr4,*" lib.so.V(shr.o) shared, rtl:yes, for executables # lib.a static archive case $host_os in aix4.[[23]]|aix4.[[23]].*|aix[[5-9]]*) for ld_flag in $LDFLAGS; do if (test x-brtl = "x$ld_flag" || test x-Wl,-brtl = "x$ld_flag"); then aix_use_runtimelinking=yes break fi done if test svr4,no = "$with_aix_soname,$aix_use_runtimelinking"; then # With aix-soname=svr4, we create the lib.so.V shared archives only, # so we don't have lib.a shared libs to link our executables. # We have to force runtime linking in this case. aix_use_runtimelinking=yes LDFLAGS="$LDFLAGS -Wl,-brtl" fi ;; esac exp_sym_flag='-bexport' no_entry_flag='-bnoentry' fi # When large executables or shared objects are built, AIX ld can # have problems creating the table of contents. If linking a library # or program results in "error TOC overflow" add -mminimal-toc to # CXXFLAGS/CFLAGS for g++/gcc. In the cases where that is not # enough to fix the problem, add -Wl,-bbigtoc to LDFLAGS. _LT_TAGVAR(archive_cmds, $1)='' _LT_TAGVAR(hardcode_direct, $1)=yes _LT_TAGVAR(hardcode_direct_absolute, $1)=yes _LT_TAGVAR(hardcode_libdir_separator, $1)=':' _LT_TAGVAR(link_all_deplibs, $1)=yes _LT_TAGVAR(file_list_spec, $1)='$wl-f,' case $with_aix_soname,$aix_use_runtimelinking in aix,*) ;; # traditional, no import file svr4,* | *,yes) # use import file # The Import File defines what to hardcode. _LT_TAGVAR(hardcode_direct, $1)=no _LT_TAGVAR(hardcode_direct_absolute, $1)=no ;; esac if test yes = "$GCC"; then case $host_os in aix4.[[012]]|aix4.[[012]].*) # We only want to do this on AIX 4.2 and lower, the check # below for broken collect2 doesn't work under 4.3+ collect2name=`$CC -print-prog-name=collect2` if test -f "$collect2name" && strings "$collect2name" | $GREP resolve_lib_name >/dev/null then # We have reworked collect2 : else # We have old collect2 _LT_TAGVAR(hardcode_direct, $1)=unsupported # It fails to find uninstalled libraries when the uninstalled # path is not listed in the libpath. Setting hardcode_minus_L # to unsupported forces relinking _LT_TAGVAR(hardcode_minus_L, $1)=yes _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir' _LT_TAGVAR(hardcode_libdir_separator, $1)= fi ;; esac shared_flag='-shared' if test yes = "$aix_use_runtimelinking"; then shared_flag="$shared_flag "'$wl-G' fi # Need to ensure runtime linking is disabled for the traditional # shared library, or the linker may eventually find shared libraries # /with/ Import File - we do not want to mix them. shared_flag_aix='-shared' shared_flag_svr4='-shared $wl-G' else # not using gcc if test ia64 = "$host_cpu"; then # VisualAge C++, Version 5.5 for AIX 5L for IA-64, Beta 3 Release # chokes on -Wl,-G. The following line is correct: shared_flag='-G' else if test yes = "$aix_use_runtimelinking"; then shared_flag='$wl-G' else shared_flag='$wl-bM:SRE' fi shared_flag_aix='$wl-bM:SRE' shared_flag_svr4='$wl-G' fi fi _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl-bexpall' # It seems that -bexpall does not export symbols beginning with # underscore (_), so it is better to generate a list of symbols to export. _LT_TAGVAR(always_export_symbols, $1)=yes if test aix,yes = "$with_aix_soname,$aix_use_runtimelinking"; then # Warning - without using the other runtime loading flags (-brtl), # -berok will link without error, but may produce a broken library. _LT_TAGVAR(allow_undefined_flag, $1)='-berok' # Determine the default libpath from the value encoded in an # empty executable. _LT_SYS_MODULE_PATH_AIX([$1]) _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-blibpath:$libdir:'"$aix_libpath" _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -o $output_objdir/$soname $libobjs $deplibs $wl'$no_entry_flag' $compiler_flags `if test -n "$allow_undefined_flag"; then func_echo_all "$wl$allow_undefined_flag"; else :; fi` $wl'$exp_sym_flag:\$export_symbols' '$shared_flag else if test ia64 = "$host_cpu"; then _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-R $libdir:/usr/lib:/lib' _LT_TAGVAR(allow_undefined_flag, $1)="-z nodefs" _LT_TAGVAR(archive_expsym_cmds, $1)="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs '"\$wl$no_entry_flag"' $compiler_flags $wl$allow_undefined_flag '"\$wl$exp_sym_flag:\$export_symbols" else # Determine the default libpath from the value encoded in an # empty executable. _LT_SYS_MODULE_PATH_AIX([$1]) _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-blibpath:$libdir:'"$aix_libpath" # Warning - without using the other run time loading flags, # -berok will link without error, but may produce a broken library. _LT_TAGVAR(no_undefined_flag, $1)=' $wl-bernotok' _LT_TAGVAR(allow_undefined_flag, $1)=' $wl-berok' if test yes = "$with_gnu_ld"; then # We only use this code for GNU lds that support --whole-archive. _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive$convenience $wl--no-whole-archive' else # Exported symbols can be pulled into shared objects from archives _LT_TAGVAR(whole_archive_flag_spec, $1)='$convenience' fi _LT_TAGVAR(archive_cmds_need_lc, $1)=yes _LT_TAGVAR(archive_expsym_cmds, $1)='$RM -r $output_objdir/$realname.d~$MKDIR $output_objdir/$realname.d' # -brtl affects multiple linker settings, -berok does not and is overridden later compiler_flags_filtered='`func_echo_all "$compiler_flags " | $SED -e "s%-brtl\\([[, ]]\\)%-berok\\1%g"`' if test svr4 != "$with_aix_soname"; then # This is similar to how AIX traditionally builds its shared libraries. _LT_TAGVAR(archive_expsym_cmds, $1)="$_LT_TAGVAR(archive_expsym_cmds, $1)"'~$CC '$shared_flag_aix' -o $output_objdir/$realname.d/$soname $libobjs $deplibs $wl-bnoentry '$compiler_flags_filtered'$wl-bE:$export_symbols$allow_undefined_flag~$AR $AR_FLAGS $output_objdir/$libname$release.a $output_objdir/$realname.d/$soname' fi if test aix != "$with_aix_soname"; then _LT_TAGVAR(archive_expsym_cmds, $1)="$_LT_TAGVAR(archive_expsym_cmds, $1)"'~$CC '$shared_flag_svr4' -o $output_objdir/$realname.d/$shared_archive_member_spec.o $libobjs $deplibs $wl-bnoentry '$compiler_flags_filtered'$wl-bE:$export_symbols$allow_undefined_flag~$STRIP -e $output_objdir/$realname.d/$shared_archive_member_spec.o~( func_echo_all "#! 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solaris*) _LT_TAGVAR(no_undefined_flag, $1)=' -z defs' if test yes = "$GCC"; then wlarc='$wl' _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $wl-z ${wl}text $wl-h $wl$soname -o $lib $libobjs $deplibs $compiler_flags' _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ $CC -shared $pic_flag $wl-z ${wl}text $wl-M $wl$lib.exp $wl-h $wl$soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp' else case `$CC -V 2>&1` in *"Compilers 5.0"*) wlarc='' _LT_TAGVAR(archive_cmds, $1)='$LD -G$allow_undefined_flag -h $soname -o $lib $libobjs $deplibs $linker_flags' _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ $LD -G$allow_undefined_flag -M $lib.exp -h $soname -o $lib $libobjs $deplibs $linker_flags~$RM $lib.exp' ;; *) wlarc='$wl' _LT_TAGVAR(archive_cmds, $1)='$CC -G$allow_undefined_flag -h $soname -o $lib $libobjs $deplibs $compiler_flags' _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~ $CC -G$allow_undefined_flag -M $lib.exp -h $soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp' ;; esac fi _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir' _LT_TAGVAR(hardcode_shlibpath_var, $1)=no case $host_os in solaris2.[[0-5]] | solaris2.[[0-5]].*) ;; *) # The compiler driver will combine and reorder linker options, # but understands '-z linker_flag'. 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(KAI) C++ Compiler # KCC will only create a shared library if the output file # ends with ".so" (or ".sl" for HP-UX), so rename the library # to its proper name (with version) after linking. _LT_TAGVAR(archive_cmds, $1)='tempext=`echo $shared_ext | $SED -e '\''s/\([[^()0-9A-Za-z{}]]\)/\\\\\1/g'\''`; templib=`echo $lib | $SED -e "s/\$tempext\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib; mv \$templib $lib' _LT_TAGVAR(archive_expsym_cmds, $1)='tempext=`echo $shared_ext | $SED -e '\''s/\([[^()0-9A-Za-z{}]]\)/\\\\\1/g'\''`; templib=`echo $lib | $SED -e "s/\$tempext\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib $wl-retain-symbols-file,$export_symbols; mv \$templib $lib' # Commands to make compiler produce verbose output that lists # what "hidden" libraries, object files and flags are used when # linking a shared library. # # There doesn't appear to be a way to prevent this compiler from # explicitly linking system object files so we need to strip them # from the output so that they don't get included in the library # dependencies. output_verbose_link_cmd='templist=`$CC $CFLAGS -v conftest.$objext -o libconftest$shared_ext 2>&1 | $GREP "ld"`; rm -f libconftest$shared_ext; list= ; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "$list"' _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath,$libdir' _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl--export-dynamic' # Archives containing C++ object files must be created using # "CC -Bstatic", where "CC" is the KAI C++ compiler. _LT_TAGVAR(old_archive_cmds, $1)='$CC -Bstatic -o $oldlib $oldobjs' ;; icpc* | ecpc* ) # Intel C++ with_gnu_ld=yes # version 8.0 and above of icpc choke on multiply defined symbols # if we add $predep_objects and $postdep_objects, however 7.1 and # earlier do not add the objects themselves. case `$CC -V 2>&1` in *"Version 7."*) _LT_TAGVAR(archive_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname -o $lib' _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib' ;; *) # Version 8.0 or newer tmp_idyn= case $host_cpu in ia64*) tmp_idyn=' -i_dynamic';; esac _LT_TAGVAR(archive_cmds, $1)='$CC -shared'"$tmp_idyn"' $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared'"$tmp_idyn"' $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib' ;; esac _LT_TAGVAR(archive_cmds_need_lc, $1)=no _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath,$libdir' _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl--export-dynamic' _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive$convenience $wl--no-whole-archive' ;; pgCC* | pgcpp*) # Portland Group C++ compiler case `$CC -V` in *pgCC\ [[1-5]].* | *pgcpp\ [[1-5]].*) _LT_TAGVAR(prelink_cmds, $1)='tpldir=Template.dir~ rm -rf $tpldir~ $CC --prelink_objects --instantiation_dir $tpldir $objs $libobjs $compile_deplibs~ compile_command="$compile_command `find $tpldir -name \*.o | sort | $NL2SP`"' _LT_TAGVAR(old_archive_cmds, $1)='tpldir=Template.dir~ rm -rf $tpldir~ $CC --prelink_objects --instantiation_dir $tpldir $oldobjs$old_deplibs~ $AR $AR_FLAGS $oldlib$oldobjs$old_deplibs `find $tpldir -name \*.o | sort | $NL2SP`~ $RANLIB $oldlib' _LT_TAGVAR(archive_cmds, $1)='tpldir=Template.dir~ rm -rf $tpldir~ $CC --prelink_objects --instantiation_dir $tpldir $predep_objects $libobjs $deplibs $convenience $postdep_objects~ $CC -shared $pic_flag $predep_objects $libobjs $deplibs `find $tpldir -name \*.o | sort | $NL2SP` $postdep_objects $compiler_flags $wl-soname $wl$soname -o $lib' _LT_TAGVAR(archive_expsym_cmds, $1)='tpldir=Template.dir~ rm -rf $tpldir~ $CC --prelink_objects --instantiation_dir $tpldir $predep_objects $libobjs $deplibs $convenience $postdep_objects~ $CC -shared $pic_flag $predep_objects $libobjs $deplibs `find $tpldir -name \*.o | sort | $NL2SP` $postdep_objects $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib' ;; *) # Version 6 and above use weak symbols _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname -o $lib' _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname $wl-retain-symbols-file $wl$export_symbols -o $lib' ;; esac _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl--rpath $wl$libdir' _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl--export-dynamic' _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive`for conv in $convenience\"\"; do test -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; func_echo_all \"$new_convenience\"` $wl--no-whole-archive' ;; cxx*) # Compaq C++ _LT_TAGVAR(archive_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname -o $lib' _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-soname $wl$soname -o $lib $wl-retain-symbols-file $wl$export_symbols' runpath_var=LD_RUN_PATH _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-rpath $libdir' _LT_TAGVAR(hardcode_libdir_separator, $1)=: # Commands to make compiler produce verbose output that lists # what "hidden" libraries, object files and flags are used when # linking a shared library. # # There doesn't appear to be a way to prevent this compiler from # explicitly linking system object files so we need to strip them # from the output so that they don't get included in the library # dependencies. output_verbose_link_cmd='templist=`$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP "ld"`; templist=`func_echo_all "$templist" | $SED "s/\(^.*ld.*\)\( .*ld .*$\)/\1/"`; list= ; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; func_echo_all "X$list" | $Xsed' ;; xl* | mpixl* | bgxl*) # IBM XL 8.0 on PPC, with GNU ld _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='$wl-rpath $wl$libdir' _LT_TAGVAR(export_dynamic_flag_spec, $1)='$wl--export-dynamic' _LT_TAGVAR(archive_cmds, $1)='$CC -qmkshrobj $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib' if test yes = "$supports_anon_versioning"; then _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $output_objdir/$libname.ver~ cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~ echo "local: *; };" >> $output_objdir/$libname.ver~ $CC -qmkshrobj $libobjs $deplibs $compiler_flags $wl-soname $wl$soname $wl-version-script $wl$output_objdir/$libname.ver -o $lib' fi ;; *) case `$CC -V 2>&1 | sed 5q` in *Sun\ C*) # Sun C++ 5.9 _LT_TAGVAR(no_undefined_flag, $1)=' -zdefs' _LT_TAGVAR(archive_cmds, $1)='$CC -G$allow_undefined_flag -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags' _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G$allow_undefined_flag -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags $wl-retain-symbols-file $wl$export_symbols' _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir' _LT_TAGVAR(whole_archive_flag_spec, $1)='$wl--whole-archive`new_convenience=; 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Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #ifndef EV_H_ #define EV_H_ #ifdef __cplusplus # define EV_CPP(x) x # if __cplusplus >= 201103L # define EV_NOEXCEPT noexcept # else # define EV_NOEXCEPT # endif #else # define EV_CPP(x) # define EV_NOEXCEPT #endif #define EV_THROW EV_NOEXCEPT /* pre-4.25, do not use in new code */ EV_CPP(extern "C" {) /*****************************************************************************/ /* pre-4.0 compatibility */ #ifndef EV_COMPAT3 # define EV_COMPAT3 1 #endif #ifndef EV_FEATURES # if defined __OPTIMIZE_SIZE__ # define EV_FEATURES 0x7c # else # define EV_FEATURES 0x7f # endif #endif #define EV_FEATURE_CODE ((EV_FEATURES) & 1) #define EV_FEATURE_DATA ((EV_FEATURES) & 2) #define EV_FEATURE_CONFIG ((EV_FEATURES) & 4) #define EV_FEATURE_API ((EV_FEATURES) & 8) #define EV_FEATURE_WATCHERS ((EV_FEATURES) & 16) #define EV_FEATURE_BACKENDS ((EV_FEATURES) & 32) #define EV_FEATURE_OS ((EV_FEATURES) & 64) /* these priorities are inclusive, higher priorities will be invoked earlier */ #ifndef EV_MINPRI # define EV_MINPRI (EV_FEATURE_CONFIG ? -2 : 0) #endif #ifndef EV_MAXPRI # define EV_MAXPRI (EV_FEATURE_CONFIG ? +2 : 0) #endif #ifndef EV_MULTIPLICITY # define EV_MULTIPLICITY EV_FEATURE_CONFIG #endif #ifndef EV_PERIODIC_ENABLE # define EV_PERIODIC_ENABLE EV_FEATURE_WATCHERS #endif #ifndef EV_STAT_ENABLE # define EV_STAT_ENABLE EV_FEATURE_WATCHERS #endif #ifndef EV_PREPARE_ENABLE # define EV_PREPARE_ENABLE EV_FEATURE_WATCHERS #endif #ifndef EV_CHECK_ENABLE # define EV_CHECK_ENABLE EV_FEATURE_WATCHERS #endif #ifndef EV_IDLE_ENABLE # define EV_IDLE_ENABLE EV_FEATURE_WATCHERS #endif #ifndef EV_FORK_ENABLE # define EV_FORK_ENABLE EV_FEATURE_WATCHERS #endif #ifndef EV_CLEANUP_ENABLE # define EV_CLEANUP_ENABLE EV_FEATURE_WATCHERS #endif #ifndef EV_SIGNAL_ENABLE # define EV_SIGNAL_ENABLE EV_FEATURE_WATCHERS #endif #ifndef EV_CHILD_ENABLE # ifdef _WIN32 # define EV_CHILD_ENABLE 0 # else # define EV_CHILD_ENABLE EV_FEATURE_WATCHERS #endif #endif #ifndef EV_ASYNC_ENABLE # define EV_ASYNC_ENABLE EV_FEATURE_WATCHERS #endif #ifndef EV_EMBED_ENABLE # define EV_EMBED_ENABLE EV_FEATURE_WATCHERS #endif #ifndef EV_WALK_ENABLE # define EV_WALK_ENABLE 0 /* not yet */ #endif /*****************************************************************************/ #if EV_CHILD_ENABLE && !EV_SIGNAL_ENABLE # undef EV_SIGNAL_ENABLE # define EV_SIGNAL_ENABLE 1 #endif /*****************************************************************************/ #ifndef EV_TSTAMP_T # define EV_TSTAMP_T double #endif typedef EV_TSTAMP_T ev_tstamp; #include /* for memmove */ #ifndef EV_ATOMIC_T # include # define EV_ATOMIC_T sig_atomic_t volatile #endif #if EV_STAT_ENABLE # ifdef _WIN32 # include # include # endif # include #endif /* support multiple event loops? */ #if EV_MULTIPLICITY struct ev_loop; # define EV_P struct ev_loop *loop /* a loop as sole parameter in a declaration */ # define EV_P_ EV_P, /* a loop as first of multiple parameters */ # define EV_A loop /* a loop as sole argument to a function call */ # define EV_A_ EV_A, /* a loop as first of multiple arguments */ # define EV_DEFAULT_UC ev_default_loop_uc_ () /* the default loop, if initialised, as sole arg */ # define EV_DEFAULT_UC_ EV_DEFAULT_UC, /* the default loop as first of multiple arguments */ # define EV_DEFAULT ev_default_loop (0) /* the default loop as sole arg */ # define EV_DEFAULT_ EV_DEFAULT, /* the default loop as first of multiple arguments */ #else # define EV_P void # define EV_P_ # define EV_A # define EV_A_ # define EV_DEFAULT # define EV_DEFAULT_ # define EV_DEFAULT_UC # define EV_DEFAULT_UC_ # undef EV_EMBED_ENABLE #endif /* EV_INLINE is used for functions in header files */ #if __STDC_VERSION__ >= 199901L || __GNUC__ >= 3 # define EV_INLINE static inline #else # define EV_INLINE static #endif #ifdef EV_API_STATIC # define EV_API_DECL static #else # define EV_API_DECL extern #endif /* EV_PROTOTYPES can be used to switch of prototype declarations */ #ifndef EV_PROTOTYPES # define EV_PROTOTYPES 1 #endif /*****************************************************************************/ #define EV_VERSION_MAJOR 4 #define EV_VERSION_MINOR 33 /* eventmask, revents, events... */ enum { EV_UNDEF = (int)0xFFFFFFFF, /* guaranteed to be invalid */ EV_NONE = 0x00, /* no events */ EV_READ = 0x01, /* ev_io detected read will not block */ EV_WRITE = 0x02, /* ev_io detected write will not block */ EV__IOFDSET = 0x80, /* internal use only */ EV_IO = EV_READ, /* alias for type-detection */ EV_TIMER = 0x00000100, /* timer timed out */ #if EV_COMPAT3 EV_TIMEOUT = EV_TIMER, /* pre 4.0 API compatibility */ #endif EV_PERIODIC = 0x00000200, /* periodic timer timed out */ EV_SIGNAL = 0x00000400, /* signal was received */ EV_CHILD = 0x00000800, /* child/pid had status change */ EV_STAT = 0x00001000, /* stat data changed */ EV_IDLE = 0x00002000, /* event loop is idling */ EV_PREPARE = 0x00004000, /* event loop about to poll */ EV_CHECK = 0x00008000, /* event loop finished poll */ EV_EMBED = 0x00010000, /* embedded event loop needs sweep */ EV_FORK = 0x00020000, /* event loop resumed in child */ EV_CLEANUP = 0x00040000, /* event loop resumed in child */ EV_ASYNC = 0x00080000, /* async intra-loop signal */ EV_CUSTOM = 0x01000000, /* for use by user code */ EV_ERROR = (int)0x80000000 /* sent when an error occurs */ }; /* can be used to add custom fields to all watchers, while losing binary compatibility */ #ifndef EV_COMMON # define EV_COMMON void *data; #endif #ifndef EV_CB_DECLARE # define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents); #endif #ifndef EV_CB_INVOKE # define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents)) #endif /* not official, do not use */ #define EV_CB(type,name) void name (EV_P_ struct ev_ ## type *w, int revents) /* * struct member types: * private: you may look at them, but not change them, * and they might not mean anything to you. * ro: can be read anytime, but only changed when the watcher isn't active. * rw: can be read and modified anytime, even when the watcher is active. * * some internal details that might be helpful for debugging: * * active is either 0, which means the watcher is not active, * or the array index of the watcher (periodics, timers) * or the array index + 1 (most other watchers) * or simply 1 for watchers that aren't in some array. * pending is either 0, in which case the watcher isn't, * or the array index + 1 in the pendings array. */ #if EV_MINPRI == EV_MAXPRI # define EV_DECL_PRIORITY #elif !defined (EV_DECL_PRIORITY) # define EV_DECL_PRIORITY int priority; #endif /* shared by all watchers */ #define EV_WATCHER(type) \ int active; /* private */ \ int pending; /* private */ \ EV_DECL_PRIORITY /* private */ \ EV_COMMON /* rw */ \ EV_CB_DECLARE (type) /* private */ #define EV_WATCHER_LIST(type) \ EV_WATCHER (type) \ struct ev_watcher_list *next; /* private */ #define EV_WATCHER_TIME(type) \ EV_WATCHER (type) \ ev_tstamp at; /* private */ /* base class, nothing to see here unless you subclass */ typedef struct ev_watcher { EV_WATCHER (ev_watcher) } ev_watcher; /* base class, nothing to see here unless you subclass */ typedef struct ev_watcher_list { EV_WATCHER_LIST (ev_watcher_list) } ev_watcher_list; /* base class, nothing to see here unless you subclass */ typedef struct ev_watcher_time { EV_WATCHER_TIME (ev_watcher_time) } ev_watcher_time; /* invoked when fd is either EV_READable or EV_WRITEable */ /* revent EV_READ, EV_WRITE */ typedef struct ev_io { EV_WATCHER_LIST (ev_io) int fd; /* ro */ int events; /* ro */ } ev_io; /* invoked after a specific time, repeatable (based on monotonic clock) */ /* revent EV_TIMEOUT */ typedef struct ev_timer { EV_WATCHER_TIME (ev_timer) ev_tstamp repeat; /* rw */ } ev_timer; /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ /* revent EV_PERIODIC */ typedef struct ev_periodic { EV_WATCHER_TIME (ev_periodic) ev_tstamp offset; /* rw */ ev_tstamp interval; /* rw */ ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now) EV_NOEXCEPT; /* rw */ } ev_periodic; /* invoked when the given signal has been received */ /* revent EV_SIGNAL */ typedef struct ev_signal { EV_WATCHER_LIST (ev_signal) int signum; /* ro */ } ev_signal; /* invoked when sigchld is received and waitpid indicates the given pid */ /* revent EV_CHILD */ /* does not support priorities */ typedef struct ev_child { EV_WATCHER_LIST (ev_child) int flags; /* private */ int pid; /* ro */ int rpid; /* rw, holds the received pid */ int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ } ev_child; #if EV_STAT_ENABLE /* st_nlink = 0 means missing file or other error */ # ifdef _WIN32 typedef struct _stati64 ev_statdata; # else typedef struct stat ev_statdata; # endif /* invoked each time the stat data changes for a given path */ /* revent EV_STAT */ typedef struct ev_stat { EV_WATCHER_LIST (ev_stat) ev_timer timer; /* private */ ev_tstamp interval; /* ro */ const char *path; /* ro */ ev_statdata prev; /* ro */ ev_statdata attr; /* ro */ int wd; /* wd for inotify, fd for kqueue */ } ev_stat; #endif /* invoked when the nothing else needs to be done, keeps the process from blocking */ /* revent EV_IDLE */ typedef struct ev_idle { EV_WATCHER (ev_idle) } ev_idle; /* invoked for each run of the mainloop, just before the blocking call */ /* you can still change events in any way you like */ /* revent EV_PREPARE */ typedef struct ev_prepare { EV_WATCHER (ev_prepare) } ev_prepare; /* invoked for each run of the mainloop, just after the blocking call */ /* revent EV_CHECK */ typedef struct ev_check { EV_WATCHER (ev_check) } ev_check; /* the callback gets invoked before check in the child process when a fork was detected */ /* revent EV_FORK */ typedef struct ev_fork { EV_WATCHER (ev_fork) } ev_fork; /* is invoked just before the loop gets destroyed */ /* revent EV_CLEANUP */ typedef struct ev_cleanup { EV_WATCHER (ev_cleanup) } ev_cleanup; #if EV_EMBED_ENABLE /* used to embed an event loop inside another */ /* the callback gets invoked when the event loop has handled events, and can be 0 */ typedef struct ev_embed { EV_WATCHER (ev_embed) struct ev_loop *other; /* ro */ #undef EV_IO_ENABLE #define EV_IO_ENABLE 1 ev_io io; /* private */ #undef EV_PREPARE_ENABLE #define EV_PREPARE_ENABLE 1 ev_prepare prepare; /* private */ ev_check check; /* unused */ ev_timer timer; /* unused */ ev_periodic periodic; /* unused */ ev_idle idle; /* unused */ ev_fork fork; /* private */ ev_cleanup cleanup; /* unused */ } ev_embed; #endif #if EV_ASYNC_ENABLE /* invoked when somebody calls ev_async_send on the watcher */ /* revent EV_ASYNC */ typedef struct ev_async { EV_WATCHER (ev_async) EV_ATOMIC_T sent; /* private */ } ev_async; # define ev_async_pending(w) (+(w)->sent) #endif /* the presence of this union forces similar struct layout */ union ev_any_watcher { struct ev_watcher w; struct ev_watcher_list wl; struct ev_io io; struct ev_timer timer; struct ev_periodic periodic; struct ev_signal signal; struct ev_child child; #if EV_STAT_ENABLE struct ev_stat stat; #endif #if EV_IDLE_ENABLE struct ev_idle idle; #endif struct ev_prepare prepare; struct ev_check check; #if EV_FORK_ENABLE struct ev_fork fork; #endif #if EV_CLEANUP_ENABLE struct ev_cleanup cleanup; #endif #if EV_EMBED_ENABLE struct ev_embed embed; #endif #if EV_ASYNC_ENABLE struct ev_async async; #endif }; /* flag bits for ev_default_loop and ev_loop_new */ enum { /* the default */ EVFLAG_AUTO = 0x00000000U, /* not quite a mask */ /* flag bits */ EVFLAG_NOENV = 0x01000000U, /* do NOT consult environment */ EVFLAG_FORKCHECK = 0x02000000U, /* check for a fork in each iteration */ /* debugging/feature disable */ EVFLAG_NOINOTIFY = 0x00100000U, /* do not attempt to use inotify */ #if EV_COMPAT3 EVFLAG_NOSIGFD = 0, /* compatibility to pre-3.9 */ #endif EVFLAG_SIGNALFD = 0x00200000U, /* attempt to use signalfd */ EVFLAG_NOSIGMASK = 0x00400000U, /* avoid modifying the signal mask */ EVFLAG_NOTIMERFD = 0x00800000U /* avoid creating a timerfd */ }; /* method bits to be ored together */ enum { EVBACKEND_SELECT = 0x00000001U, /* available just about anywhere */ EVBACKEND_POLL = 0x00000002U, /* !win, !aix, broken on osx */ EVBACKEND_EPOLL = 0x00000004U, /* linux */ EVBACKEND_KQUEUE = 0x00000008U, /* bsd, broken on osx */ EVBACKEND_DEVPOLL = 0x00000010U, /* solaris 8 */ /* NYI */ EVBACKEND_PORT = 0x00000020U, /* solaris 10 */ EVBACKEND_LINUXAIO = 0x00000040U, /* linux AIO, 4.19+ */ EVBACKEND_IOURING = 0x00000080U, /* linux io_uring, 5.1+ */ EVBACKEND_ALL = 0x000000FFU, /* all known backends */ EVBACKEND_MASK = 0x0000FFFFU /* all future backends */ }; #if EV_PROTOTYPES EV_API_DECL int ev_version_major (void) EV_NOEXCEPT; EV_API_DECL int ev_version_minor (void) EV_NOEXCEPT; EV_API_DECL unsigned int ev_supported_backends (void) EV_NOEXCEPT; EV_API_DECL unsigned int ev_recommended_backends (void) EV_NOEXCEPT; EV_API_DECL unsigned int ev_embeddable_backends (void) EV_NOEXCEPT; EV_API_DECL ev_tstamp ev_time (void) EV_NOEXCEPT; EV_API_DECL void ev_sleep (ev_tstamp delay) EV_NOEXCEPT; /* sleep for a while */ /* Sets the allocation function to use, works like realloc. * It is used to allocate and free memory. * If it returns zero when memory needs to be allocated, the library might abort * or take some potentially destructive action. * The default is your system realloc function. */ EV_API_DECL void ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT; /* set the callback function to call on a * retryable syscall error * (such as failed select, poll, epoll_wait) */ EV_API_DECL void ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT; #if EV_MULTIPLICITY /* the default loop is the only one that handles signals and child watchers */ /* you can call this as often as you like */ EV_API_DECL struct ev_loop *ev_default_loop (unsigned int flags EV_CPP (= 0)) EV_NOEXCEPT; #ifdef EV_API_STATIC EV_API_DECL struct ev_loop *ev_default_loop_ptr; #endif EV_INLINE struct ev_loop * ev_default_loop_uc_ (void) EV_NOEXCEPT { extern struct ev_loop *ev_default_loop_ptr; return ev_default_loop_ptr; } EV_INLINE int ev_is_default_loop (EV_P) EV_NOEXCEPT { return EV_A == EV_DEFAULT_UC; } /* create and destroy alternative loops that don't handle signals */ EV_API_DECL struct ev_loop *ev_loop_new (unsigned int flags EV_CPP (= 0)) EV_NOEXCEPT; EV_API_DECL ev_tstamp ev_now (EV_P) EV_NOEXCEPT; /* time w.r.t. timers and the eventloop, updated after each poll */ #else EV_API_DECL int ev_default_loop (unsigned int flags EV_CPP (= 0)) EV_NOEXCEPT; /* returns true when successful */ EV_API_DECL ev_tstamp ev_rt_now; EV_INLINE ev_tstamp ev_now (void) EV_NOEXCEPT { return ev_rt_now; } /* looks weird, but ev_is_default_loop (EV_A) still works if this exists */ EV_INLINE int ev_is_default_loop (void) EV_NOEXCEPT { return 1; } #endif /* multiplicity */ /* destroy event loops, also works for the default loop */ EV_API_DECL void ev_loop_destroy (EV_P); /* this needs to be called after fork, to duplicate the loop */ /* when you want to re-use it in the child */ /* you can call it in either the parent or the child */ /* you can actually call it at any time, anywhere :) */ EV_API_DECL void ev_loop_fork (EV_P) EV_NOEXCEPT; EV_API_DECL unsigned int ev_backend (EV_P) EV_NOEXCEPT; /* backend in use by loop */ EV_API_DECL void ev_now_update (EV_P) EV_NOEXCEPT; /* update event loop time */ #if EV_WALK_ENABLE /* walk (almost) all watchers in the loop of a given type, invoking the */ /* callback on every such watcher. The callback might stop the watcher, */ /* but do nothing else with the loop */ EV_API_DECL void ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT; #endif #endif /* prototypes */ /* ev_run flags values */ enum { EVRUN_NOWAIT = 1, /* do not block/wait */ EVRUN_ONCE = 2 /* block *once* only */ }; /* ev_break how values */ enum { EVBREAK_CANCEL = 0, /* undo unloop */ EVBREAK_ONE = 1, /* unloop once */ EVBREAK_ALL = 2 /* unloop all loops */ }; #if EV_PROTOTYPES EV_API_DECL int ev_run (EV_P_ int flags EV_CPP (= 0)); EV_API_DECL void ev_break (EV_P_ int how EV_CPP (= EVBREAK_ONE)) EV_NOEXCEPT; /* break out of the loop */ /* * ref/unref can be used to add or remove a refcount on the mainloop. every watcher * keeps one reference. if you have a long-running watcher you never unregister that * should not keep ev_loop from running, unref() after starting, and ref() before stopping. */ EV_API_DECL void ev_ref (EV_P) EV_NOEXCEPT; EV_API_DECL void ev_unref (EV_P) EV_NOEXCEPT; /* * convenience function, wait for a single event, without registering an event watcher * if timeout is < 0, do wait indefinitely */ EV_API_DECL void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT; EV_API_DECL void ev_invoke_pending (EV_P); /* invoke all pending watchers */ # if EV_FEATURE_API EV_API_DECL unsigned int ev_iteration (EV_P) EV_NOEXCEPT; /* number of loop iterations */ EV_API_DECL unsigned int ev_depth (EV_P) EV_NOEXCEPT; /* #ev_loop enters - #ev_loop leaves */ EV_API_DECL void ev_verify (EV_P) EV_NOEXCEPT; /* abort if loop data corrupted */ EV_API_DECL void ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT; /* sleep at least this time, default 0 */ EV_API_DECL void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT; /* sleep at least this time, default 0 */ /* advanced stuff for threading etc. support, see docs */ EV_API_DECL void ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT; EV_API_DECL void *ev_userdata (EV_P) EV_NOEXCEPT; typedef void (*ev_loop_callback)(EV_P); EV_API_DECL void ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT; /* C++ doesn't allow the use of the ev_loop_callback typedef here, so we need to spell it out */ EV_API_DECL void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT; EV_API_DECL unsigned int ev_pending_count (EV_P) EV_NOEXCEPT; /* number of pending events, if any */ /* * stop/start the timer handling. */ EV_API_DECL void ev_suspend (EV_P) EV_NOEXCEPT; EV_API_DECL void ev_resume (EV_P) EV_NOEXCEPT; #endif #endif /* these may evaluate ev multiple times, and the other arguments at most once */ /* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ #define ev_init(ev,cb_) do { \ ((ev_watcher *)(void *)(ev))->active = \ ((ev_watcher *)(void *)(ev))->pending = 0; \ ev_set_priority ((ev), 0); \ ev_set_cb ((ev), cb_); \ } while (0) #define ev_io_modify(ev,events_) do { (ev)->events = (ev)->events & EV__IOFDSET | (events_); } while (0) #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_) | EV__IOFDSET; } while (0) #define ev_timer_set(ev,after_,repeat_) do { ((ev_watcher_time *)(ev))->at = (after_); (ev)->repeat = (repeat_); } while (0) #define ev_periodic_set(ev,ofs_,ival_,rcb_) do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb = (rcb_); } while (0) #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) #define ev_child_set(ev,pid_,trace_) do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0) #define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0) #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ #define ev_embed_set(ev,other_) do { (ev)->other = (other_); } while (0) #define ev_fork_set(ev) /* nop, yes, this is a serious in-joke */ #define ev_cleanup_set(ev) /* nop, yes, this is a serious in-joke */ #define ev_async_set(ev) /* nop, yes, this is a serious in-joke */ #define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) #define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) #define ev_periodic_init(ev,cb,ofs,ival,rcb) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(ofs),(ival),(rcb)); } while (0) #define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) #define ev_child_init(ev,cb,pid,trace) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid),(trace)); } while (0) #define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0) #define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) #define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) #define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0) #define ev_embed_init(ev,cb,other) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0) #define ev_fork_init(ev,cb) do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0) #define ev_cleanup_init(ev,cb) do { ev_init ((ev), (cb)); ev_cleanup_set ((ev)); } while (0) #define ev_async_init(ev,cb) do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0) #define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */ #define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */ #define ev_cb_(ev) (ev)->cb /* rw */ #define ev_cb(ev) (memmove (&ev_cb_ (ev), &((ev_watcher *)(ev))->cb, sizeof (ev_cb_ (ev))), (ev)->cb) #if EV_MINPRI == EV_MAXPRI # define ev_priority(ev) ((ev), EV_MINPRI) # define ev_set_priority(ev,pri) ((ev), (pri)) #else # define ev_priority(ev) (+(((ev_watcher *)(void *)(ev))->priority)) # define ev_set_priority(ev,pri) ( (ev_watcher *)(void *)(ev))->priority = (pri) #endif #define ev_periodic_at(ev) (+((ev_watcher_time *)(ev))->at) #ifndef ev_set_cb /* memmove is used here to avoid strict aliasing violations, and hopefully is optimized out by any reasonable compiler */ # define ev_set_cb(ev,cb_) (ev_cb_ (ev) = (cb_), memmove (&((ev_watcher *)(ev))->cb, &ev_cb_ (ev), sizeof (ev_cb_ (ev)))) #endif /* stopping (enabling, adding) a watcher does nothing if it is already running */ /* stopping (disabling, deleting) a watcher does nothing unless it's already running */ #if EV_PROTOTYPES /* feeds an event into a watcher as if the event actually occurred */ /* accepts any ev_watcher type */ EV_API_DECL void ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT; EV_API_DECL void ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT; #if EV_SIGNAL_ENABLE EV_API_DECL void ev_feed_signal (int signum) EV_NOEXCEPT; EV_API_DECL void ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT; #endif EV_API_DECL void ev_invoke (EV_P_ void *w, int revents); EV_API_DECL int ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT; EV_API_DECL void ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT; EV_API_DECL void ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT; EV_API_DECL void ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT; EV_API_DECL void ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT; /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ EV_API_DECL void ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT; /* return remaining time */ EV_API_DECL ev_tstamp ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT; #if EV_PERIODIC_ENABLE EV_API_DECL void ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT; EV_API_DECL void ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT; EV_API_DECL void ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT; #endif /* only supported in the default loop */ #if EV_SIGNAL_ENABLE EV_API_DECL void ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT; EV_API_DECL void ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT; #endif /* only supported in the default loop */ # if EV_CHILD_ENABLE EV_API_DECL void ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT; EV_API_DECL void ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT; # endif # if EV_STAT_ENABLE EV_API_DECL void ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT; EV_API_DECL void ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT; EV_API_DECL void ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT; # endif # if EV_IDLE_ENABLE EV_API_DECL void ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT; EV_API_DECL void ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT; # endif #if EV_PREPARE_ENABLE EV_API_DECL void ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT; EV_API_DECL void ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT; #endif #if EV_CHECK_ENABLE EV_API_DECL void ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT; EV_API_DECL void ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT; #endif # if EV_FORK_ENABLE EV_API_DECL void ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT; EV_API_DECL void ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT; # endif # if EV_CLEANUP_ENABLE EV_API_DECL void ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT; EV_API_DECL void ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT; # endif # if EV_EMBED_ENABLE /* only supported when loop to be embedded is in fact embeddable */ EV_API_DECL void ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT; EV_API_DECL void ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT; EV_API_DECL void ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT; # endif # if EV_ASYNC_ENABLE EV_API_DECL void ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT; EV_API_DECL void ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT; EV_API_DECL void ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT; # endif #if EV_COMPAT3 #define EVLOOP_NONBLOCK EVRUN_NOWAIT #define EVLOOP_ONESHOT EVRUN_ONCE #define EVUNLOOP_CANCEL EVBREAK_CANCEL #define EVUNLOOP_ONE EVBREAK_ONE #define EVUNLOOP_ALL EVBREAK_ALL #if EV_PROTOTYPES EV_INLINE void ev_loop (EV_P_ int flags) { ev_run (EV_A_ flags); } EV_INLINE void ev_unloop (EV_P_ int how ) { ev_break (EV_A_ how ); } EV_INLINE void ev_default_destroy (void) { ev_loop_destroy (EV_DEFAULT); } EV_INLINE void ev_default_fork (void) { ev_loop_fork (EV_DEFAULT); } #if EV_FEATURE_API EV_INLINE unsigned int ev_loop_count (EV_P) { return ev_iteration (EV_A); } EV_INLINE unsigned int ev_loop_depth (EV_P) { return ev_depth (EV_A); } EV_INLINE void ev_loop_verify (EV_P) { ev_verify (EV_A); } #endif #endif #else typedef struct ev_loop ev_loop; #endif #endif EV_CPP(}) #endif libev-4.33/ev++.h0000644000000000000000000005010513631212545010347 00000000000000/* * libev simple C++ wrapper classes * * Copyright (c) 2007,2008,2010,2018,2020 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #ifndef EVPP_H__ #define EVPP_H__ #ifdef EV_H # include EV_H #else # include "ev.h" #endif #ifndef EV_USE_STDEXCEPT # define EV_USE_STDEXCEPT 1 #endif #if EV_USE_STDEXCEPT # include #endif namespace ev { typedef ev_tstamp tstamp; enum { UNDEF = EV_UNDEF, NONE = EV_NONE, READ = EV_READ, WRITE = EV_WRITE, #if EV_COMPAT3 TIMEOUT = EV_TIMEOUT, #endif TIMER = EV_TIMER, PERIODIC = EV_PERIODIC, SIGNAL = EV_SIGNAL, CHILD = EV_CHILD, STAT = EV_STAT, IDLE = EV_IDLE, CHECK = EV_CHECK, PREPARE = EV_PREPARE, FORK = EV_FORK, ASYNC = EV_ASYNC, EMBED = EV_EMBED, # undef ERROR // some systems stupidly #define ERROR ERROR = EV_ERROR }; enum { AUTO = EVFLAG_AUTO, NOENV = EVFLAG_NOENV, FORKCHECK = EVFLAG_FORKCHECK, SELECT = EVBACKEND_SELECT, POLL = EVBACKEND_POLL, EPOLL = EVBACKEND_EPOLL, KQUEUE = EVBACKEND_KQUEUE, DEVPOLL = EVBACKEND_DEVPOLL, PORT = EVBACKEND_PORT }; enum { #if EV_COMPAT3 NONBLOCK = EVLOOP_NONBLOCK, ONESHOT = EVLOOP_ONESHOT, #endif NOWAIT = EVRUN_NOWAIT, ONCE = EVRUN_ONCE }; enum how_t { ONE = EVBREAK_ONE, ALL = EVBREAK_ALL }; struct bad_loop #if EV_USE_STDEXCEPT : std::exception #endif { #if EV_USE_STDEXCEPT const char *what () const EV_NOEXCEPT { return "libev event loop cannot be initialized, bad value of LIBEV_FLAGS?"; } #endif }; #ifdef EV_AX # undef EV_AX #endif #ifdef EV_AX_ # undef EV_AX_ #endif #if EV_MULTIPLICITY # define EV_AX raw_loop # define EV_AX_ raw_loop, #else # define EV_AX # define EV_AX_ #endif struct loop_ref { loop_ref (EV_P) EV_NOEXCEPT #if EV_MULTIPLICITY : EV_AX (EV_A) #endif { } bool operator == (const loop_ref &other) const EV_NOEXCEPT { #if EV_MULTIPLICITY return EV_AX == other.EV_AX; #else return true; #endif } bool operator != (const loop_ref &other) const EV_NOEXCEPT { #if EV_MULTIPLICITY return ! (*this == other); #else return false; #endif } #if EV_MULTIPLICITY bool operator == (const EV_P) const EV_NOEXCEPT { return this->EV_AX == EV_A; } bool operator != (const EV_P) const EV_NOEXCEPT { return ! (*this == EV_A); } operator struct ev_loop * () const EV_NOEXCEPT { return EV_AX; } operator const struct ev_loop * () const EV_NOEXCEPT { return EV_AX; } bool is_default () const EV_NOEXCEPT { return EV_AX == ev_default_loop (0); } #endif #if EV_COMPAT3 void loop (int flags = 0) { ev_run (EV_AX_ flags); } void unloop (how_t how = ONE) EV_NOEXCEPT { ev_break (EV_AX_ how); } #endif void run (int flags = 0) { ev_run (EV_AX_ flags); } void break_loop (how_t how = ONE) EV_NOEXCEPT { ev_break (EV_AX_ how); } void post_fork () EV_NOEXCEPT { ev_loop_fork (EV_AX); } unsigned int backend () const EV_NOEXCEPT { return ev_backend (EV_AX); } tstamp now () const EV_NOEXCEPT { return ev_now (EV_AX); } void ref () EV_NOEXCEPT { ev_ref (EV_AX); } void unref () EV_NOEXCEPT { ev_unref (EV_AX); } #if EV_FEATURE_API unsigned int iteration () const EV_NOEXCEPT { return ev_iteration (EV_AX); } unsigned int depth () const EV_NOEXCEPT { return ev_depth (EV_AX); } void set_io_collect_interval (tstamp interval) EV_NOEXCEPT { ev_set_io_collect_interval (EV_AX_ interval); } void set_timeout_collect_interval (tstamp interval) EV_NOEXCEPT { ev_set_timeout_collect_interval (EV_AX_ interval); } #endif // function callback void once (int fd, int events, tstamp timeout, void (*cb)(int, void *), void *arg = 0) EV_NOEXCEPT { ev_once (EV_AX_ fd, events, timeout, cb, arg); } // method callback template void once (int fd, int events, tstamp timeout, K *object) EV_NOEXCEPT { once (fd, events, timeout, method_thunk, object); } // default method == operator () template void once (int fd, int events, tstamp timeout, K *object) EV_NOEXCEPT { once (fd, events, timeout, method_thunk, object); } template static void method_thunk (int revents, void *arg) { (static_cast(arg)->*method) (revents); } // no-argument method callback template void once (int fd, int events, tstamp timeout, K *object) EV_NOEXCEPT { once (fd, events, timeout, method_noargs_thunk, object); } template static void method_noargs_thunk (int revents, void *arg) { (static_cast(arg)->*method) (); } // simpler function callback template void once (int fd, int events, tstamp timeout) EV_NOEXCEPT { once (fd, events, timeout, simpler_func_thunk); } template static void simpler_func_thunk (int revents, void *arg) { (*cb) (revents); } // simplest function callback template void once (int fd, int events, tstamp timeout) EV_NOEXCEPT { once (fd, events, timeout, simplest_func_thunk); } template static void simplest_func_thunk (int revents, void *arg) { (*cb) (); } void feed_fd_event (int fd, int revents) EV_NOEXCEPT { ev_feed_fd_event (EV_AX_ fd, revents); } void feed_signal_event (int signum) EV_NOEXCEPT { ev_feed_signal_event (EV_AX_ signum); } #if EV_MULTIPLICITY struct ev_loop* EV_AX; #endif }; #if EV_MULTIPLICITY struct dynamic_loop : loop_ref { dynamic_loop (unsigned int flags = AUTO) : loop_ref (ev_loop_new (flags)) { if (!EV_AX) throw bad_loop (); } ~dynamic_loop () EV_NOEXCEPT { ev_loop_destroy (EV_AX); EV_AX = 0; } private: dynamic_loop (const dynamic_loop &); dynamic_loop & operator= (const dynamic_loop &); }; #endif struct default_loop : loop_ref { default_loop (unsigned int flags = AUTO) #if EV_MULTIPLICITY : loop_ref (ev_default_loop (flags)) #endif { if ( #if EV_MULTIPLICITY !EV_AX #else !ev_default_loop (flags) #endif ) throw bad_loop (); } private: default_loop (const default_loop &); default_loop &operator = (const default_loop &); }; inline loop_ref get_default_loop () EV_NOEXCEPT { #if EV_MULTIPLICITY return ev_default_loop (0); #else return loop_ref (); #endif } #undef EV_AX #undef EV_AX_ #undef EV_PX #undef EV_PX_ #if EV_MULTIPLICITY # define EV_PX loop_ref EV_A # define EV_PX_ loop_ref EV_A_ #else # define EV_PX # define EV_PX_ #endif template struct base : ev_watcher { // scoped pause/unpause of a watcher struct freeze_guard { watcher &w; bool active; freeze_guard (watcher *self) EV_NOEXCEPT : w (*self), active (w.is_active ()) { if (active) w.stop (); } ~freeze_guard () { if (active) w.start (); } }; #if EV_MULTIPLICITY EV_PX; // loop set void set (EV_P) EV_NOEXCEPT { this->EV_A = EV_A; } #endif base (EV_PX) EV_NOEXCEPT #if EV_MULTIPLICITY : EV_A (EV_A) #endif { ev_init (this, 0); } void set_ (const void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) EV_NOEXCEPT { this->data = (void *)data; ev_set_cb (static_cast(this), cb); } // function callback template void set (void *data = 0) EV_NOEXCEPT { set_ (data, function_thunk); } template static void function_thunk (EV_P_ ev_watcher *w, int revents) { function (*static_cast(w), revents); } // method callback template void set (K *object) EV_NOEXCEPT { set_ (object, method_thunk); } // default method == operator () template void set (K *object) EV_NOEXCEPT { set_ (object, method_thunk); } template static void method_thunk (EV_P_ ev_watcher *w, int revents) { (static_cast(w->data)->*method) (*static_cast(w), revents); } // no-argument callback template void set (K *object) EV_NOEXCEPT { set_ (object, method_noargs_thunk); } template static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents) { (static_cast(w->data)->*method) (); } void operator ()(int events = EV_UNDEF) { return ev_cb (static_cast(this)) (static_cast(this), events); } bool is_active () const EV_NOEXCEPT { return ev_is_active (static_cast(this)); } bool is_pending () const EV_NOEXCEPT { return ev_is_pending (static_cast(this)); } void feed_event (int revents) EV_NOEXCEPT { ev_feed_event (EV_A_ static_cast(this), revents); } }; inline tstamp now (EV_P) EV_NOEXCEPT { return ev_now (EV_A); } inline void delay (tstamp interval) EV_NOEXCEPT { ev_sleep (interval); } inline int version_major () EV_NOEXCEPT { return ev_version_major (); } inline int version_minor () EV_NOEXCEPT { return ev_version_minor (); } inline unsigned int supported_backends () EV_NOEXCEPT { return ev_supported_backends (); } inline unsigned int recommended_backends () EV_NOEXCEPT { return ev_recommended_backends (); } inline unsigned int embeddable_backends () EV_NOEXCEPT { return ev_embeddable_backends (); } inline void set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT { ev_set_allocator (cb); } inline void set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT { ev_set_syserr_cb (cb); } #if EV_MULTIPLICITY #define EV_CONSTRUCT(cppstem,cstem) \ (EV_PX = get_default_loop ()) EV_NOEXCEPT \ : base (EV_A) \ { \ } #else #define EV_CONSTRUCT(cppstem,cstem) \ () EV_NOEXCEPT \ { \ } #endif /* using a template here would require quite a few more lines, * so a macro solution was chosen */ #define EV_BEGIN_WATCHER(cppstem,cstem) \ \ struct cppstem : base \ { \ void start () EV_NOEXCEPT \ { \ ev_ ## cstem ## _start (EV_A_ static_cast(this)); \ } \ \ void stop () EV_NOEXCEPT \ { \ ev_ ## cstem ## _stop (EV_A_ static_cast(this)); \ } \ \ cppstem EV_CONSTRUCT(cppstem,cstem) \ \ ~cppstem () EV_NOEXCEPT \ { \ stop (); \ } \ \ using base::set; \ \ private: \ \ cppstem (const cppstem &o); \ \ cppstem &operator =(const cppstem &o); \ \ public: #define EV_END_WATCHER(cppstem,cstem) \ }; EV_BEGIN_WATCHER (io, io) void set (int fd, int events) EV_NOEXCEPT { freeze_guard freeze (this); ev_io_set (static_cast(this), fd, events); } void set (int events) EV_NOEXCEPT { freeze_guard freeze (this); ev_io_modify (static_cast(this), events); } void start (int fd, int events) EV_NOEXCEPT { set (fd, events); start (); } EV_END_WATCHER (io, io) EV_BEGIN_WATCHER (timer, timer) void set (ev_tstamp after, ev_tstamp repeat = 0.) EV_NOEXCEPT { freeze_guard freeze (this); ev_timer_set (static_cast(this), after, repeat); } void start (ev_tstamp after, ev_tstamp repeat = 0.) EV_NOEXCEPT { set (after, repeat); start (); } void again () EV_NOEXCEPT { ev_timer_again (EV_A_ static_cast(this)); } ev_tstamp remaining () { return ev_timer_remaining (EV_A_ static_cast(this)); } EV_END_WATCHER (timer, timer) #if EV_PERIODIC_ENABLE EV_BEGIN_WATCHER (periodic, periodic) void set (ev_tstamp at, ev_tstamp interval = 0.) EV_NOEXCEPT { freeze_guard freeze (this); ev_periodic_set (static_cast(this), at, interval, 0); } void start (ev_tstamp at, ev_tstamp interval = 0.) EV_NOEXCEPT { set (at, interval); start (); } void again () EV_NOEXCEPT { ev_periodic_again (EV_A_ static_cast(this)); } EV_END_WATCHER (periodic, periodic) #endif #if EV_SIGNAL_ENABLE EV_BEGIN_WATCHER (sig, signal) void set (int signum) EV_NOEXCEPT { freeze_guard freeze (this); ev_signal_set (static_cast(this), signum); } void start (int signum) EV_NOEXCEPT { set (signum); start (); } EV_END_WATCHER (sig, signal) #endif #if EV_CHILD_ENABLE EV_BEGIN_WATCHER (child, child) void set (int pid, int trace = 0) EV_NOEXCEPT { freeze_guard freeze (this); ev_child_set (static_cast(this), pid, trace); } void start (int pid, int trace = 0) EV_NOEXCEPT { set (pid, trace); start (); } EV_END_WATCHER (child, child) #endif #if EV_STAT_ENABLE EV_BEGIN_WATCHER (stat, stat) void set (const char *path, ev_tstamp interval = 0.) EV_NOEXCEPT { freeze_guard freeze (this); ev_stat_set (static_cast(this), path, interval); } void start (const char *path, ev_tstamp interval = 0.) EV_NOEXCEPT { stop (); set (path, interval); start (); } void update () EV_NOEXCEPT { ev_stat_stat (EV_A_ static_cast(this)); } EV_END_WATCHER (stat, stat) #endif #if EV_IDLE_ENABLE EV_BEGIN_WATCHER (idle, idle) void set () EV_NOEXCEPT { } EV_END_WATCHER (idle, idle) #endif #if EV_PREPARE_ENABLE EV_BEGIN_WATCHER (prepare, prepare) void set () EV_NOEXCEPT { } EV_END_WATCHER (prepare, prepare) #endif #if EV_CHECK_ENABLE EV_BEGIN_WATCHER (check, check) void set () EV_NOEXCEPT { } EV_END_WATCHER (check, check) #endif #if EV_EMBED_ENABLE EV_BEGIN_WATCHER (embed, embed) void set_embed (struct ev_loop *embedded_loop) EV_NOEXCEPT { freeze_guard freeze (this); ev_embed_set (static_cast(this), embedded_loop); } void start (struct ev_loop *embedded_loop) EV_NOEXCEPT { set (embedded_loop); start (); } void sweep () { ev_embed_sweep (EV_A_ static_cast(this)); } EV_END_WATCHER (embed, embed) #endif #if EV_FORK_ENABLE EV_BEGIN_WATCHER (fork, fork) void set () EV_NOEXCEPT { } EV_END_WATCHER (fork, fork) #endif #if EV_ASYNC_ENABLE EV_BEGIN_WATCHER (async, async) void send () EV_NOEXCEPT { ev_async_send (EV_A_ static_cast(this)); } bool async_pending () EV_NOEXCEPT { return ev_async_pending (static_cast(this)); } EV_END_WATCHER (async, async) #endif #undef EV_PX #undef EV_PX_ #undef EV_CONSTRUCT #undef EV_BEGIN_WATCHER #undef EV_END_WATCHER } #endif libev-4.33/event.h0000644000000000000000000001415413364232073010735 00000000000000/* * libevent compatibility header, only core events supported * * Copyright (c) 2007,2008,2010,2012 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #ifndef EVENT_H_ #define EVENT_H_ #ifdef EV_H # include EV_H #else # include "ev.h" #endif #ifndef EVLOOP_NONBLOCK # define EVLOOP_NONBLOCK EVRUN_NOWAIT #endif #ifndef EVLOOP_ONESHOT # define EVLOOP_ONESHOT EVRUN_ONCE #endif #ifndef EV_TIMEOUT # define EV_TIMEOUT EV_TIMER #endif #ifdef __cplusplus extern "C" { #endif /* we need sys/time.h for struct timeval only */ #if !defined (WIN32) || defined (__MINGW32__) # include /* mingw seems to need this, for whatever reason */ # include #endif struct event_base; #define EVLIST_TIMEOUT 0x01 #define EVLIST_INSERTED 0x02 #define EVLIST_SIGNAL 0x04 #define EVLIST_ACTIVE 0x08 #define EVLIST_INTERNAL 0x10 #define EVLIST_INIT 0x80 typedef void (*event_callback_fn)(int, short, void *); struct event { /* libev watchers we map onto */ union { struct ev_io io; struct ev_signal sig; } iosig; struct ev_timer to; /* compatibility slots */ struct event_base *ev_base; event_callback_fn ev_callback; void *ev_arg; int ev_fd; int ev_pri; int ev_res; int ev_flags; short ev_events; }; event_callback_fn event_get_callback (const struct event *ev); #define EV_READ EV_READ #define EV_WRITE EV_WRITE #define EV_PERSIST 0x10 #define EV_ET 0x20 /* nop */ #define EVENT_SIGNAL(ev) ((int) (ev)->ev_fd) #define EVENT_FD(ev) ((int) (ev)->ev_fd) #define event_initialized(ev) ((ev)->ev_flags & EVLIST_INIT) #define evtimer_add(ev,tv) event_add (ev, tv) #define evtimer_set(ev,cb,data) event_set (ev, -1, 0, cb, data) #define evtimer_del(ev) event_del (ev) #define evtimer_pending(ev,tv) event_pending (ev, EV_TIMEOUT, tv) #define evtimer_initialized(ev) event_initialized (ev) #define timeout_add(ev,tv) evtimer_add (ev, tv) #define timeout_set(ev,cb,data) evtimer_set (ev, cb, data) #define timeout_del(ev) evtimer_del (ev) #define timeout_pending(ev,tv) evtimer_pending (ev, tv) #define timeout_initialized(ev) evtimer_initialized (ev) #define signal_add(ev,tv) event_add (ev, tv) #define signal_set(ev,sig,cb,data) event_set (ev, sig, EV_SIGNAL | EV_PERSIST, cb, data) #define signal_del(ev) event_del (ev) #define signal_pending(ev,tv) event_pending (ev, EV_SIGNAL, tv) #define signal_initialized(ev) event_initialized (ev) const char *event_get_version (void); const char *event_get_method (void); void *event_init (void); void event_base_free (struct event_base *base); #define EVLOOP_ONCE EVLOOP_ONESHOT int event_loop (int); int event_loopexit (struct timeval *tv); int event_dispatch (void); #define _EVENT_LOG_DEBUG 0 #define _EVENT_LOG_MSG 1 #define _EVENT_LOG_WARN 2 #define _EVENT_LOG_ERR 3 typedef void (*event_log_cb)(int severity, const char *msg); void event_set_log_callback(event_log_cb cb); void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg); int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv); int event_add (struct event *ev, struct timeval *tv); int event_del (struct event *ev); void event_active (struct event *ev, int res, short ncalls); /* ncalls is being ignored */ int event_pending (struct event *ev, short, struct timeval *tv); int event_priority_init (int npri); int event_priority_set (struct event *ev, int pri); struct event_base *event_base_new (void); const char *event_base_get_method (const struct event_base *); int event_base_set (struct event_base *base, struct event *ev); int event_base_loop (struct event_base *base, int); int event_base_loopexit (struct event_base *base, struct timeval *tv); int event_base_dispatch (struct event_base *base); int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv); int event_base_priority_init (struct event_base *base, int fd); /* next line is different in the libevent+libev version */ /*libevent-include*/ #ifdef __cplusplus } #endif #endif libev-4.33/Makefile.in0000644000000000000000000007401113634411662011511 00000000000000# Makefile.in generated by automake 1.16.1 from Makefile.am. # @configure_input@ # Copyright (C) 1994-2018 Free Software Foundation, Inc. # This Makefile.in is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY, to the extent permitted by law; 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Generated from configure.ac by autoheader. */ /* Define to 1 if you have the `clock_gettime' function. */ #undef HAVE_CLOCK_GETTIME /* Define to 1 to use the syscall interface for clock_gettime */ #undef HAVE_CLOCK_SYSCALL /* Define to 1 if you have the header file. */ #undef HAVE_DLFCN_H /* Define to 1 if you have the `epoll_ctl' function. */ #undef HAVE_EPOLL_CTL /* Define to 1 if you have the `eventfd' function. */ #undef HAVE_EVENTFD /* Define to 1 if the floor function is available */ #undef HAVE_FLOOR /* Define to 1 if you have the `inotify_init' function. */ #undef HAVE_INOTIFY_INIT /* Define to 1 if you have the header file. */ #undef HAVE_INTTYPES_H /* Define to 1 if linux/fs.h defined kernel_rwf_t */ #undef HAVE_KERNEL_RWF_T /* Define to 1 if you have the `kqueue' function. */ #undef HAVE_KQUEUE /* Define to 1 if you have the `rt' library (-lrt). */ #undef HAVE_LIBRT /* Define to 1 if you have the header file. */ #undef HAVE_LINUX_AIO_ABI_H /* Define to 1 if you have the header file. */ #undef HAVE_LINUX_FS_H /* Define to 1 if you have the header file. */ #undef HAVE_MEMORY_H /* Define to 1 if you have the `nanosleep' function. */ #undef HAVE_NANOSLEEP /* Define to 1 if you have the `poll' function. */ #undef HAVE_POLL /* Define to 1 if you have the header file. */ #undef HAVE_POLL_H /* Define to 1 if you have the `port_create' function. */ #undef HAVE_PORT_CREATE /* Define to 1 if you have the header file. */ #undef HAVE_PORT_H /* Define to 1 if you have the `select' function. */ #undef HAVE_SELECT /* Define to 1 if you have the `signalfd' function. */ #undef HAVE_SIGNALFD /* Define to 1 if you have the header file. */ #undef HAVE_STDINT_H /* Define to 1 if you have the header file. */ #undef HAVE_STDLIB_H /* Define to 1 if you have the header file. */ #undef HAVE_STRINGS_H /* Define to 1 if you have the header file. */ #undef HAVE_STRING_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_EPOLL_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_EVENTFD_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_EVENT_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_INOTIFY_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_SELECT_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_SIGNALFD_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_STAT_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_TIMERFD_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_TYPES_H /* Define to 1 if you have the header file. */ #undef HAVE_UNISTD_H /* Define to the sub-directory where libtool stores uninstalled libraries. */ #undef LT_OBJDIR /* Name of package */ #undef PACKAGE /* Define to the address where bug reports for this package should be sent. */ #undef PACKAGE_BUGREPORT /* Define to the full name of this package. */ #undef PACKAGE_NAME /* Define to the full name and version of this package. */ #undef PACKAGE_STRING /* Define to the one symbol short name of this package. */ #undef PACKAGE_TARNAME /* Define to the home page for this package. */ #undef PACKAGE_URL /* Define to the version of this package. */ #undef PACKAGE_VERSION /* Define to 1 if you have the ANSI C header files. */ #undef STDC_HEADERS /* Version number of package */ #undef VERSION libev-4.33/README0000644000000000000000000000503613556456317010336 00000000000000libev is a high-performance event loop/event model with lots of features. (see benchmark at http://libev.schmorp.de/bench.html) ABOUT Homepage: http://software.schmorp.de/pkg/libev Mailinglist: libev@lists.schmorp.de http://lists.schmorp.de/cgi-bin/mailman/listinfo/libev Library Documentation: http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod Libev is modelled (very losely) after libevent and the Event perl module, but is faster, scales better and is more correct, and also more featureful. And also smaller. Yay. Some of the specialties of libev not commonly found elsewhere are: - extensive and detailed, readable documentation (not doxygen garbage). - fully supports fork, can detect fork in various ways and automatically re-arms kernel mechanisms that do not support fork. - highly optimised select, poll, linux epoll, linux aio, bsd kqueue and solaris event ports backends. - filesystem object (path) watching (with optional linux inotify support). - wallclock-based times (using absolute time, cron-like). - relative timers/timeouts (handle time jumps). - fast intra-thread communication between multiple event loops (with optional fast linux eventfd backend). - extremely easy to embed (fully documented, no dependencies, autoconf supported but optional). - very small codebase, no bloated library, simple code. - fully extensible by being able to plug into the event loop, integrate other event loops, integrate other event loop users. - very little memory use (small watchers, small event loop data). - optional C++ interface allowing method and function callbacks at no extra memory or runtime overhead. - optional Perl interface with similar characteristics (capable of running Glib/Gtk2 on libev). - support for other languages (multiple C++ interfaces, D, Ruby, Python) available from third-parties. Examples of programs that embed libev: the EV perl module, node.js, auditd, rxvt-unicode, gvpe (GNU Virtual Private Ethernet), the Deliantra MMORPG server (http://www.deliantra.net/), Rubinius (a next-generation Ruby VM), the Ebb web server, the Rev event toolkit. CONTRIBUTORS libev was written and designed by Marc Lehmann and Emanuele Giaquinta. The following people sent in patches or made other noteworthy contributions to the design (for minor patches, see the Changes file. If I forgot to include you, please shout at me, it was an accident): W.C.A. Wijngaards Christopher Layne Chris Brody libev-4.33/TODO0000644000000000000000000000131113013113132010103 00000000000000TODO: ev_loop_wakeup TODO: EV_STANDALONE == NO_HASSLE (do not use clock_gettime in ev_standalone) TODO: faq, process a thing in each iteration TODO: dbeugging tips, ev_verify, ev_init twice TODO: ev_break for immediate exit (EVBREAK_NOW?) TODO: ev_feed_child_event TODO: document the special problem of signals around fork. TODO: store pid for each signal TODO: document file descriptor usage per loop TODO: store loop pid_t and compare isndie signal handler,store 1 for same, 2 for differign pid, clean up in loop_fork TODO: embed watchers need updating when fd changes TODO: document portability requirements for atomic pointer access TODO: document requirements for function pointers and calling conventions. libev-4.33/compile0000744000000000000000000001632713634411656011031 00000000000000#! /bin/sh # Wrapper for compilers which do not understand '-c -o'. scriptversion=2018-03-07.03; # UTC # Copyright (C) 1999-2018 Free Software Foundation, Inc. # Written by Tom Tromey . # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, or (at your option) # any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under # the same distribution terms that you use for the rest of that program. # This file is maintained in Automake, please report # bugs to or send patches to # . nl=' ' # We need space, tab and new line, in precisely that order. Quoting is # there to prevent tools from complaining about whitespace usage. IFS=" "" $nl" file_conv= # func_file_conv build_file lazy # Convert a $build file to $host form and store it in $file # Currently only supports Windows hosts. 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But MiNT is downward compatible to TOS, so this should # be no problem. atarist[e]:*MiNT:*:* | atarist[e]:*mint:*:* | atarist[e]:*TOS:*:*) echo m68k-atari-mint"$UNAME_RELEASE" exit ;; atari*:*MiNT:*:* | atari*:*mint:*:* | atarist[e]:*TOS:*:*) echo m68k-atari-mint"$UNAME_RELEASE" exit ;; *falcon*:*MiNT:*:* | *falcon*:*mint:*:* | *falcon*:*TOS:*:*) echo m68k-atari-mint"$UNAME_RELEASE" exit ;; milan*:*MiNT:*:* | milan*:*mint:*:* | *milan*:*TOS:*:*) echo m68k-milan-mint"$UNAME_RELEASE" exit ;; hades*:*MiNT:*:* | hades*:*mint:*:* | *hades*:*TOS:*:*) echo m68k-hades-mint"$UNAME_RELEASE" exit ;; *:*MiNT:*:* | *:*mint:*:* | *:*TOS:*:*) echo m68k-unknown-mint"$UNAME_RELEASE" exit ;; m68k:machten:*:*) echo m68k-apple-machten"$UNAME_RELEASE" exit ;; powerpc:machten:*:*) echo powerpc-apple-machten"$UNAME_RELEASE" exit ;; RISC*:Mach:*:*) echo mips-dec-mach_bsd4.3 exit ;; RISC*:ULTRIX:*:*) echo mips-dec-ultrix"$UNAME_RELEASE" exit ;; VAX*:ULTRIX*:*:*) echo vax-dec-ultrix"$UNAME_RELEASE" exit ;; 2020:CLIX:*:* | 2430:CLIX:*:*) echo clipper-intergraph-clix"$UNAME_RELEASE" exit ;; mips:*:*:UMIPS | mips:*:*:RISCos) eval "$set_cc_for_build" sed 's/^ //' << EOF > "$dummy.c" #ifdef __cplusplus #include /* for printf() prototype */ int main (int argc, char *argv[]) { #else int main (argc, argv) int argc; char *argv[]; { #endif #if defined (host_mips) && defined (MIPSEB) #if defined (SYSTYPE_SYSV) printf ("mips-mips-riscos%ssysv\\n", argv[1]); exit (0); #endif #if defined (SYSTYPE_SVR4) printf ("mips-mips-riscos%ssvr4\\n", argv[1]); exit (0); #endif #if defined (SYSTYPE_BSD43) || defined(SYSTYPE_BSD) printf ("mips-mips-riscos%sbsd\\n", argv[1]); exit (0); #endif #endif exit (-1); } EOF $CC_FOR_BUILD -o "$dummy" "$dummy.c" && dummyarg=`echo "$UNAME_RELEASE" | sed -n 's/\([0-9]*\).*/\1/p'` && SYSTEM_NAME=`"$dummy" "$dummyarg"` && { echo "$SYSTEM_NAME"; exit; } echo mips-mips-riscos"$UNAME_RELEASE" exit ;; Motorola:PowerMAX_OS:*:*) echo powerpc-motorola-powermax exit ;; Motorola:*:4.3:PL8-*) echo powerpc-harris-powermax exit ;; Night_Hawk:*:*:PowerMAX_OS | Synergy:PowerMAX_OS:*:*) echo powerpc-harris-powermax exit ;; Night_Hawk:Power_UNIX:*:*) echo powerpc-harris-powerunix exit ;; m88k:CX/UX:7*:*) echo m88k-harris-cxux7 exit ;; m88k:*:4*:R4*) echo m88k-motorola-sysv4 exit ;; m88k:*:3*:R3*) echo m88k-motorola-sysv3 exit ;; AViiON:dgux:*:*) # DG/UX returns AViiON for all architectures UNAME_PROCESSOR=`/usr/bin/uname -p` if [ "$UNAME_PROCESSOR" = mc88100 ] || [ "$UNAME_PROCESSOR" = mc88110 ] then if [ "$TARGET_BINARY_INTERFACE"x = m88kdguxelfx ] || \ [ "$TARGET_BINARY_INTERFACE"x = x ] then echo m88k-dg-dgux"$UNAME_RELEASE" else echo m88k-dg-dguxbcs"$UNAME_RELEASE" fi else echo i586-dg-dgux"$UNAME_RELEASE" fi exit ;; M88*:DolphinOS:*:*) # DolphinOS (SVR3) echo m88k-dolphin-sysv3 exit ;; M88*:*:R3*:*) # Delta 88k system running SVR3 echo m88k-motorola-sysv3 exit ;; XD88*:*:*:*) # Tektronix XD88 system running UTekV (SVR3) echo m88k-tektronix-sysv3 exit ;; Tek43[0-9][0-9]:UTek:*:*) # Tektronix 4300 system running UTek (BSD) echo m68k-tektronix-bsd exit ;; *:IRIX*:*:*) echo mips-sgi-irix"`echo "$UNAME_RELEASE"|sed -e 's/-/_/g'`" exit ;; ????????:AIX?:[12].1:2) # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX. echo romp-ibm-aix # uname -m gives an 8 hex-code CPU id exit ;; # Note that: echo "'`uname -s`'" gives 'AIX ' i*86:AIX:*:*) echo i386-ibm-aix exit ;; ia64:AIX:*:*) if [ -x /usr/bin/oslevel ] ; then IBM_REV=`/usr/bin/oslevel` else IBM_REV="$UNAME_VERSION.$UNAME_RELEASE" fi echo "$UNAME_MACHINE"-ibm-aix"$IBM_REV" exit ;; *:AIX:2:3) if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then eval "$set_cc_for_build" sed 's/^ //' << EOF > "$dummy.c" #include main() { if (!__power_pc()) exit(1); puts("powerpc-ibm-aix3.2.5"); exit(0); } EOF if $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"` then echo "$SYSTEM_NAME" else echo rs6000-ibm-aix3.2.5 fi elif grep bos324 /usr/include/stdio.h >/dev/null 2>&1; then echo rs6000-ibm-aix3.2.4 else echo rs6000-ibm-aix3.2 fi exit ;; *:AIX:*:[4567]) IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | sed 1q | awk '{ print $1 }'` if /usr/sbin/lsattr -El "$IBM_CPU_ID" | grep ' POWER' >/dev/null 2>&1; then IBM_ARCH=rs6000 else IBM_ARCH=powerpc fi if [ -x /usr/bin/lslpp ] ; then IBM_REV=`/usr/bin/lslpp -Lqc bos.rte.libc | awk -F: '{ print $3 }' | sed s/[0-9]*$/0/` else IBM_REV="$UNAME_VERSION.$UNAME_RELEASE" fi echo "$IBM_ARCH"-ibm-aix"$IBM_REV" exit ;; *:AIX:*:*) echo rs6000-ibm-aix exit ;; ibmrt:4.4BSD:*|romp-ibm:4.4BSD:*) echo romp-ibm-bsd4.4 exit ;; ibmrt:*BSD:*|romp-ibm:BSD:*) # covers RT/PC BSD and echo romp-ibm-bsd"$UNAME_RELEASE" # 4.3 with uname added to exit ;; # report: romp-ibm BSD 4.3 *:BOSX:*:*) echo rs6000-bull-bosx exit ;; DPX/2?00:B.O.S.:*:*) echo m68k-bull-sysv3 exit ;; 9000/[34]??:4.3bsd:1.*:*) echo m68k-hp-bsd exit ;; hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*) echo m68k-hp-bsd4.4 exit ;; 9000/[34678]??:HP-UX:*:*) HPUX_REV=`echo "$UNAME_RELEASE"|sed -e 's/[^.]*.[0B]*//'` case "$UNAME_MACHINE" in 9000/31?) HP_ARCH=m68000 ;; 9000/[34]??) HP_ARCH=m68k ;; 9000/[678][0-9][0-9]) if [ -x /usr/bin/getconf ]; then sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null` sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null` case "$sc_cpu_version" in 523) HP_ARCH=hppa1.0 ;; # CPU_PA_RISC1_0 528) HP_ARCH=hppa1.1 ;; # CPU_PA_RISC1_1 532) # CPU_PA_RISC2_0 case "$sc_kernel_bits" in 32) HP_ARCH=hppa2.0n ;; 64) HP_ARCH=hppa2.0w ;; '') HP_ARCH=hppa2.0 ;; # HP-UX 10.20 esac ;; esac fi if [ "$HP_ARCH" = "" ]; then eval "$set_cc_for_build" sed 's/^ //' << EOF > "$dummy.c" #define _HPUX_SOURCE #include #include int main () { #if defined(_SC_KERNEL_BITS) long bits = sysconf(_SC_KERNEL_BITS); #endif long cpu = sysconf (_SC_CPU_VERSION); switch (cpu) { case CPU_PA_RISC1_0: puts ("hppa1.0"); break; case CPU_PA_RISC1_1: puts ("hppa1.1"); break; case CPU_PA_RISC2_0: #if defined(_SC_KERNEL_BITS) switch (bits) { case 64: puts ("hppa2.0w"); break; case 32: puts ("hppa2.0n"); break; default: puts ("hppa2.0"); break; } break; #else /* !defined(_SC_KERNEL_BITS) */ puts ("hppa2.0"); break; #endif default: puts ("hppa1.0"); break; } exit (0); } EOF (CCOPTS="" $CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null) && HP_ARCH=`"$dummy"` test -z "$HP_ARCH" && HP_ARCH=hppa fi ;; esac if [ "$HP_ARCH" = hppa2.0w ] then eval "$set_cc_for_build" # hppa2.0w-hp-hpux* has a 64-bit kernel and a compiler generating # 32-bit code. hppa64-hp-hpux* has the same kernel and a compiler # generating 64-bit code. GNU and HP use different nomenclature: # # $ CC_FOR_BUILD=cc ./config.guess # => hppa2.0w-hp-hpux11.23 # $ CC_FOR_BUILD="cc +DA2.0w" ./config.guess # => hppa64-hp-hpux11.23 if echo __LP64__ | (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | grep -q __LP64__ then HP_ARCH=hppa2.0w else HP_ARCH=hppa64 fi fi echo "$HP_ARCH"-hp-hpux"$HPUX_REV" exit ;; ia64:HP-UX:*:*) HPUX_REV=`echo "$UNAME_RELEASE"|sed -e 's/[^.]*.[0B]*//'` echo ia64-hp-hpux"$HPUX_REV" exit ;; 3050*:HI-UX:*:*) eval "$set_cc_for_build" sed 's/^ //' << EOF > "$dummy.c" #include int main () { long cpu = sysconf (_SC_CPU_VERSION); /* The order matters, because CPU_IS_HP_MC68K erroneously returns true for CPU_PA_RISC1_0. CPU_IS_PA_RISC returns correct results, however. */ if (CPU_IS_PA_RISC (cpu)) { switch (cpu) { case CPU_PA_RISC1_0: puts ("hppa1.0-hitachi-hiuxwe2"); break; case CPU_PA_RISC1_1: puts ("hppa1.1-hitachi-hiuxwe2"); break; case CPU_PA_RISC2_0: puts ("hppa2.0-hitachi-hiuxwe2"); break; default: puts ("hppa-hitachi-hiuxwe2"); break; } } else if (CPU_IS_HP_MC68K (cpu)) puts ("m68k-hitachi-hiuxwe2"); else puts ("unknown-hitachi-hiuxwe2"); exit (0); } EOF $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"` && { echo "$SYSTEM_NAME"; exit; } echo unknown-hitachi-hiuxwe2 exit ;; 9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:*) echo hppa1.1-hp-bsd exit ;; 9000/8??:4.3bsd:*:*) echo hppa1.0-hp-bsd exit ;; *9??*:MPE/iX:*:* | *3000*:MPE/iX:*:*) echo hppa1.0-hp-mpeix exit ;; hp7??:OSF1:*:* | hp8?[79]:OSF1:*:*) echo hppa1.1-hp-osf exit ;; hp8??:OSF1:*:*) echo hppa1.0-hp-osf exit ;; i*86:OSF1:*:*) if [ -x /usr/sbin/sysversion ] ; then echo "$UNAME_MACHINE"-unknown-osf1mk else echo "$UNAME_MACHINE"-unknown-osf1 fi exit ;; parisc*:Lites*:*:*) echo hppa1.1-hp-lites exit ;; C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*) echo c1-convex-bsd exit ;; C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*) if getsysinfo -f scalar_acc then echo c32-convex-bsd else echo c2-convex-bsd fi exit ;; C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*) echo c34-convex-bsd exit ;; C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*) echo c38-convex-bsd exit ;; C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*) echo c4-convex-bsd exit ;; CRAY*Y-MP:*:*:*) echo ymp-cray-unicos"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/' exit ;; CRAY*[A-Z]90:*:*:*) echo "$UNAME_MACHINE"-cray-unicos"$UNAME_RELEASE" \ | sed -e 's/CRAY.*\([A-Z]90\)/\1/' \ -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/ \ -e 's/\.[^.]*$/.X/' exit ;; CRAY*TS:*:*:*) echo t90-cray-unicos"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/' exit ;; CRAY*T3E:*:*:*) echo alphaev5-cray-unicosmk"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/' exit ;; CRAY*SV1:*:*:*) echo sv1-cray-unicos"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/' exit ;; *:UNICOS/mp:*:*) echo craynv-cray-unicosmp"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/' exit ;; F30[01]:UNIX_System_V:*:* | F700:UNIX_System_V:*:*) FUJITSU_PROC=`uname -m | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz` FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'` FUJITSU_REL=`echo "$UNAME_RELEASE" | sed -e 's/ /_/'` echo "${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}" exit ;; 5000:UNIX_System_V:4.*:*) FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'` FUJITSU_REL=`echo "$UNAME_RELEASE" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/ /_/'` echo "sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}" exit ;; i*86:BSD/386:*:* | i*86:BSD/OS:*:* | *:Ascend\ Embedded/OS:*:*) echo "$UNAME_MACHINE"-pc-bsdi"$UNAME_RELEASE" exit ;; sparc*:BSD/OS:*:*) echo sparc-unknown-bsdi"$UNAME_RELEASE" exit ;; *:BSD/OS:*:*) echo "$UNAME_MACHINE"-unknown-bsdi"$UNAME_RELEASE" exit ;; *:FreeBSD:*:*) UNAME_PROCESSOR=`/usr/bin/uname -p` case "$UNAME_PROCESSOR" in amd64) UNAME_PROCESSOR=x86_64 ;; i386) UNAME_PROCESSOR=i586 ;; esac echo "$UNAME_PROCESSOR"-unknown-freebsd"`echo "$UNAME_RELEASE"|sed -e 's/[-(].*//'`" exit ;; i*:CYGWIN*:*) echo "$UNAME_MACHINE"-pc-cygwin exit ;; *:MINGW64*:*) echo "$UNAME_MACHINE"-pc-mingw64 exit ;; *:MINGW*:*) echo "$UNAME_MACHINE"-pc-mingw32 exit ;; *:MSYS*:*) echo "$UNAME_MACHINE"-pc-msys exit ;; i*:PW*:*) echo "$UNAME_MACHINE"-pc-pw32 exit ;; *:Interix*:*) case "$UNAME_MACHINE" in x86) echo i586-pc-interix"$UNAME_RELEASE" exit ;; authenticamd | genuineintel | EM64T) echo x86_64-unknown-interix"$UNAME_RELEASE" exit ;; IA64) echo ia64-unknown-interix"$UNAME_RELEASE" exit ;; esac ;; i*:UWIN*:*) echo "$UNAME_MACHINE"-pc-uwin exit ;; amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*) echo x86_64-unknown-cygwin exit ;; prep*:SunOS:5.*:*) echo powerpcle-unknown-solaris2"`echo "$UNAME_RELEASE"|sed -e 's/[^.]*//'`" exit ;; *:GNU:*:*) # the GNU system echo "`echo "$UNAME_MACHINE"|sed -e 's,[-/].*$,,'`-unknown-$LIBC`echo "$UNAME_RELEASE"|sed -e 's,/.*$,,'`" exit ;; *:GNU/*:*:*) # other systems with GNU libc and userland echo "$UNAME_MACHINE-unknown-`echo "$UNAME_SYSTEM" | sed 's,^[^/]*/,,' | tr "[:upper:]" "[:lower:]"``echo "$UNAME_RELEASE"|sed -e 's/[-(].*//'`-$LIBC" exit ;; i*86:Minix:*:*) echo "$UNAME_MACHINE"-pc-minix exit ;; aarch64:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; aarch64_be:Linux:*:*) UNAME_MACHINE=aarch64_be echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; alpha:Linux:*:*) case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in EV5) UNAME_MACHINE=alphaev5 ;; EV56) UNAME_MACHINE=alphaev56 ;; PCA56) UNAME_MACHINE=alphapca56 ;; PCA57) UNAME_MACHINE=alphapca56 ;; EV6) UNAME_MACHINE=alphaev6 ;; EV67) UNAME_MACHINE=alphaev67 ;; EV68*) UNAME_MACHINE=alphaev68 ;; esac objdump --private-headers /bin/sh | grep -q ld.so.1 if test "$?" = 0 ; then LIBC=gnulibc1 ; fi echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; arc:Linux:*:* | arceb:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; arm*:Linux:*:*) eval "$set_cc_for_build" if echo __ARM_EABI__ | $CC_FOR_BUILD -E - 2>/dev/null \ | grep -q __ARM_EABI__ then echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" else if echo __ARM_PCS_VFP | $CC_FOR_BUILD -E - 2>/dev/null \ | grep -q __ARM_PCS_VFP then echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"eabi else echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"eabihf fi fi exit ;; avr32*:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; cris:Linux:*:*) echo "$UNAME_MACHINE"-axis-linux-"$LIBC" exit ;; crisv32:Linux:*:*) echo "$UNAME_MACHINE"-axis-linux-"$LIBC" exit ;; e2k:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; frv:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; hexagon:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; i*86:Linux:*:*) echo "$UNAME_MACHINE"-pc-linux-"$LIBC" exit ;; ia64:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; k1om:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; m32r*:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; m68*:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; mips:Linux:*:* | mips64:Linux:*:*) eval "$set_cc_for_build" sed 's/^ //' << EOF > "$dummy.c" #undef CPU #undef ${UNAME_MACHINE} #undef ${UNAME_MACHINE}el #if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL) CPU=${UNAME_MACHINE}el #else #if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB) CPU=${UNAME_MACHINE} #else CPU= #endif #endif EOF eval "`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^CPU'`" test "x$CPU" != x && { echo "$CPU-unknown-linux-$LIBC"; exit; } ;; mips64el:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; openrisc*:Linux:*:*) echo or1k-unknown-linux-"$LIBC" exit ;; or32:Linux:*:* | or1k*:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; padre:Linux:*:*) echo sparc-unknown-linux-"$LIBC" exit ;; parisc64:Linux:*:* | hppa64:Linux:*:*) echo hppa64-unknown-linux-"$LIBC" exit ;; parisc:Linux:*:* | hppa:Linux:*:*) # Look for CPU level case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in PA7*) echo hppa1.1-unknown-linux-"$LIBC" ;; PA8*) echo hppa2.0-unknown-linux-"$LIBC" ;; *) echo hppa-unknown-linux-"$LIBC" ;; esac exit ;; ppc64:Linux:*:*) echo powerpc64-unknown-linux-"$LIBC" exit ;; ppc:Linux:*:*) echo powerpc-unknown-linux-"$LIBC" exit ;; ppc64le:Linux:*:*) echo powerpc64le-unknown-linux-"$LIBC" exit ;; ppcle:Linux:*:*) echo powerpcle-unknown-linux-"$LIBC" exit ;; riscv32:Linux:*:* | riscv64:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; s390:Linux:*:* | s390x:Linux:*:*) echo "$UNAME_MACHINE"-ibm-linux-"$LIBC" exit ;; sh64*:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; sh*:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; sparc:Linux:*:* | sparc64:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; tile*:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; vax:Linux:*:*) echo "$UNAME_MACHINE"-dec-linux-"$LIBC" exit ;; x86_64:Linux:*:*) if objdump -f /bin/sh | grep -q elf32-x86-64; then echo "$UNAME_MACHINE"-pc-linux-"$LIBC"x32 else echo "$UNAME_MACHINE"-pc-linux-"$LIBC" fi exit ;; xtensa*:Linux:*:*) echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" exit ;; i*86:DYNIX/ptx:4*:*) # ptx 4.0 does uname -s correctly, with DYNIX/ptx in there. # earlier versions are messed up and put the nodename in both # sysname and nodename. echo i386-sequent-sysv4 exit ;; i*86:UNIX_SV:4.2MP:2.*) # Unixware is an offshoot of SVR4, but it has its own version # number series starting with 2... # I am not positive that other SVR4 systems won't match this, # I just have to hope. -- rms. # Use sysv4.2uw... so that sysv4* matches it. echo "$UNAME_MACHINE"-pc-sysv4.2uw"$UNAME_VERSION" exit ;; i*86:OS/2:*:*) # If we were able to find `uname', then EMX Unix compatibility # is probably installed. echo "$UNAME_MACHINE"-pc-os2-emx exit ;; i*86:XTS-300:*:STOP) echo "$UNAME_MACHINE"-unknown-stop exit ;; i*86:atheos:*:*) echo "$UNAME_MACHINE"-unknown-atheos exit ;; i*86:syllable:*:*) echo "$UNAME_MACHINE"-pc-syllable exit ;; i*86:LynxOS:2.*:* | i*86:LynxOS:3.[01]*:* | i*86:LynxOS:4.[02]*:*) echo i386-unknown-lynxos"$UNAME_RELEASE" exit ;; i*86:*DOS:*:*) echo "$UNAME_MACHINE"-pc-msdosdjgpp exit ;; i*86:*:4.*:*) UNAME_REL=`echo "$UNAME_RELEASE" | sed 's/\/MP$//'` if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then echo "$UNAME_MACHINE"-univel-sysv"$UNAME_REL" else echo "$UNAME_MACHINE"-pc-sysv"$UNAME_REL" fi exit ;; i*86:*:5:[678]*) # UnixWare 7.x, OpenUNIX and OpenServer 6. case `/bin/uname -X | grep "^Machine"` in *486*) UNAME_MACHINE=i486 ;; *Pentium) UNAME_MACHINE=i586 ;; *Pent*|*Celeron) UNAME_MACHINE=i686 ;; esac echo "$UNAME_MACHINE-unknown-sysv${UNAME_RELEASE}${UNAME_SYSTEM}{$UNAME_VERSION}" exit ;; i*86:*:3.2:*) if test -f /usr/options/cb.name; then UNAME_REL=`sed -n 's/.*Version //p' /dev/null >/dev/null ; then UNAME_REL=`(/bin/uname -X|grep Release|sed -e 's/.*= //')` (/bin/uname -X|grep i80486 >/dev/null) && UNAME_MACHINE=i486 (/bin/uname -X|grep '^Machine.*Pentium' >/dev/null) \ && UNAME_MACHINE=i586 (/bin/uname -X|grep '^Machine.*Pent *II' >/dev/null) \ && UNAME_MACHINE=i686 (/bin/uname -X|grep '^Machine.*Pentium Pro' >/dev/null) \ && UNAME_MACHINE=i686 echo "$UNAME_MACHINE"-pc-sco"$UNAME_REL" else echo "$UNAME_MACHINE"-pc-sysv32 fi exit ;; pc:*:*:*) # Left here for compatibility: # uname -m prints for DJGPP always 'pc', but it prints nothing about # the processor, so we play safe by assuming i586. # Note: whatever this is, it MUST be the same as what config.sub # prints for the "djgpp" host, or else GDB configure will decide that # this is a cross-build. echo i586-pc-msdosdjgpp exit ;; Intel:Mach:3*:*) echo i386-pc-mach3 exit ;; paragon:*:*:*) echo i860-intel-osf1 exit ;; i860:*:4.*:*) # i860-SVR4 if grep Stardent /usr/include/sys/uadmin.h >/dev/null 2>&1 ; then echo i860-stardent-sysv"$UNAME_RELEASE" # Stardent Vistra i860-SVR4 else # Add other i860-SVR4 vendors below as they are discovered. echo i860-unknown-sysv"$UNAME_RELEASE" # Unknown i860-SVR4 fi exit ;; mini*:CTIX:SYS*5:*) # "miniframe" echo m68010-convergent-sysv exit ;; mc68k:UNIX:SYSTEM5:3.51m) echo m68k-convergent-sysv exit ;; M680?0:D-NIX:5.3:*) echo m68k-diab-dnix exit ;; M68*:*:R3V[5678]*:*) test -r /sysV68 && { echo 'm68k-motorola-sysv'; exit; } ;; 3[345]??:*:4.0:3.0 | 3[34]??A:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 3[34]??/*:*:4.0:3.0 | 4400:*:4.0:3.0 | 4850:*:4.0:3.0 | SKA40:*:4.0:3.0 | SDS2:*:4.0:3.0 | SHG2:*:4.0:3.0 | S7501*:*:4.0:3.0) OS_REL='' test -r /etc/.relid \ && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid` /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ && { echo i486-ncr-sysv4.3"$OS_REL"; exit; } /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \ && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } ;; 3[34]??:*:4.0:* | 3[34]??,*:*:4.0:*) /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ && { echo i486-ncr-sysv4; exit; } ;; NCR*:*:4.2:* | MPRAS*:*:4.2:*) OS_REL='.3' test -r /etc/.relid \ && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid` /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ && { echo i486-ncr-sysv4.3"$OS_REL"; exit; } /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \ && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } /bin/uname -p 2>/dev/null | /bin/grep pteron >/dev/null \ && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } ;; m68*:LynxOS:2.*:* | m68*:LynxOS:3.0*:*) echo m68k-unknown-lynxos"$UNAME_RELEASE" exit ;; mc68030:UNIX_System_V:4.*:*) echo m68k-atari-sysv4 exit ;; TSUNAMI:LynxOS:2.*:*) echo sparc-unknown-lynxos"$UNAME_RELEASE" exit ;; rs6000:LynxOS:2.*:*) echo rs6000-unknown-lynxos"$UNAME_RELEASE" exit ;; PowerPC:LynxOS:2.*:* | PowerPC:LynxOS:3.[01]*:* | PowerPC:LynxOS:4.[02]*:*) echo powerpc-unknown-lynxos"$UNAME_RELEASE" exit ;; SM[BE]S:UNIX_SV:*:*) echo mips-dde-sysv"$UNAME_RELEASE" exit ;; RM*:ReliantUNIX-*:*:*) echo mips-sni-sysv4 exit ;; RM*:SINIX-*:*:*) echo mips-sni-sysv4 exit ;; *:SINIX-*:*:*) if uname -p 2>/dev/null >/dev/null ; then UNAME_MACHINE=`(uname -p) 2>/dev/null` echo "$UNAME_MACHINE"-sni-sysv4 else echo ns32k-sni-sysv fi exit ;; PENTIUM:*:4.0*:*) # Unisys `ClearPath HMP IX 4000' SVR4/MP effort # says echo i586-unisys-sysv4 exit ;; *:UNIX_System_V:4*:FTX*) # From Gerald Hewes . # How about differentiating between stratus architectures? -djm echo hppa1.1-stratus-sysv4 exit ;; *:*:*:FTX*) # From seanf@swdc.stratus.com. echo i860-stratus-sysv4 exit ;; i*86:VOS:*:*) # From Paul.Green@stratus.com. echo "$UNAME_MACHINE"-stratus-vos exit ;; *:VOS:*:*) # From Paul.Green@stratus.com. echo hppa1.1-stratus-vos exit ;; mc68*:A/UX:*:*) echo m68k-apple-aux"$UNAME_RELEASE" exit ;; news*:NEWS-OS:6*:*) echo mips-sony-newsos6 exit ;; R[34]000:*System_V*:*:* | R4000:UNIX_SYSV:*:* | R*000:UNIX_SV:*:*) if [ -d /usr/nec ]; then echo mips-nec-sysv"$UNAME_RELEASE" else echo mips-unknown-sysv"$UNAME_RELEASE" fi exit ;; BeBox:BeOS:*:*) # BeOS running on hardware made by Be, PPC only. echo powerpc-be-beos exit ;; BeMac:BeOS:*:*) # BeOS running on Mac or Mac clone, PPC only. echo powerpc-apple-beos exit ;; BePC:BeOS:*:*) # BeOS running on Intel PC compatible. echo i586-pc-beos exit ;; BePC:Haiku:*:*) # Haiku running on Intel PC compatible. echo i586-pc-haiku exit ;; x86_64:Haiku:*:*) echo x86_64-unknown-haiku exit ;; SX-4:SUPER-UX:*:*) echo sx4-nec-superux"$UNAME_RELEASE" exit ;; SX-5:SUPER-UX:*:*) echo sx5-nec-superux"$UNAME_RELEASE" exit ;; SX-6:SUPER-UX:*:*) echo sx6-nec-superux"$UNAME_RELEASE" exit ;; SX-7:SUPER-UX:*:*) echo sx7-nec-superux"$UNAME_RELEASE" exit ;; SX-8:SUPER-UX:*:*) echo sx8-nec-superux"$UNAME_RELEASE" exit ;; SX-8R:SUPER-UX:*:*) echo sx8r-nec-superux"$UNAME_RELEASE" exit ;; SX-ACE:SUPER-UX:*:*) echo sxace-nec-superux"$UNAME_RELEASE" exit ;; Power*:Rhapsody:*:*) echo powerpc-apple-rhapsody"$UNAME_RELEASE" exit ;; *:Rhapsody:*:*) echo "$UNAME_MACHINE"-apple-rhapsody"$UNAME_RELEASE" exit ;; *:Darwin:*:*) UNAME_PROCESSOR=`uname -p` || UNAME_PROCESSOR=unknown eval "$set_cc_for_build" if test "$UNAME_PROCESSOR" = unknown ; then UNAME_PROCESSOR=powerpc fi if test "`echo "$UNAME_RELEASE" | sed -e 's/\..*//'`" -le 10 ; then if [ "$CC_FOR_BUILD" != no_compiler_found ]; then if (echo '#ifdef __LP64__'; echo IS_64BIT_ARCH; echo '#endif') | \ (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \ grep IS_64BIT_ARCH >/dev/null then case $UNAME_PROCESSOR in i386) UNAME_PROCESSOR=x86_64 ;; powerpc) UNAME_PROCESSOR=powerpc64 ;; esac fi # On 10.4-10.6 one might compile for PowerPC via gcc -arch ppc if (echo '#ifdef __POWERPC__'; echo IS_PPC; echo '#endif') | \ (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \ grep IS_PPC >/dev/null then UNAME_PROCESSOR=powerpc fi fi elif test "$UNAME_PROCESSOR" = i386 ; then # Avoid executing cc on OS X 10.9, as it ships with a stub # that puts up a graphical alert prompting to install # developer tools. Any system running Mac OS X 10.7 or # later (Darwin 11 and later) is required to have a 64-bit # processor. This is not true of the ARM version of Darwin # that Apple uses in portable devices. UNAME_PROCESSOR=x86_64 fi echo "$UNAME_PROCESSOR"-apple-darwin"$UNAME_RELEASE" exit ;; *:procnto*:*:* | *:QNX:[0123456789]*:*) UNAME_PROCESSOR=`uname -p` if test "$UNAME_PROCESSOR" = x86; then UNAME_PROCESSOR=i386 UNAME_MACHINE=pc fi echo "$UNAME_PROCESSOR"-"$UNAME_MACHINE"-nto-qnx"$UNAME_RELEASE" exit ;; *:QNX:*:4*) echo i386-pc-qnx exit ;; NEO-*:NONSTOP_KERNEL:*:*) echo neo-tandem-nsk"$UNAME_RELEASE" exit ;; NSE-*:NONSTOP_KERNEL:*:*) echo nse-tandem-nsk"$UNAME_RELEASE" exit ;; NSR-*:NONSTOP_KERNEL:*:*) echo nsr-tandem-nsk"$UNAME_RELEASE" exit ;; NSV-*:NONSTOP_KERNEL:*:*) echo nsv-tandem-nsk"$UNAME_RELEASE" exit ;; NSX-*:NONSTOP_KERNEL:*:*) echo nsx-tandem-nsk"$UNAME_RELEASE" exit ;; *:NonStop-UX:*:*) echo mips-compaq-nonstopux exit ;; BS2000:POSIX*:*:*) echo bs2000-siemens-sysv exit ;; DS/*:UNIX_System_V:*:*) echo "$UNAME_MACHINE"-"$UNAME_SYSTEM"-"$UNAME_RELEASE" exit ;; *:Plan9:*:*) # "uname -m" is not consistent, so use $cputype instead. 386 # is converted to i386 for consistency with other x86 # operating systems. if test "$cputype" = 386; then UNAME_MACHINE=i386 else UNAME_MACHINE="$cputype" fi echo "$UNAME_MACHINE"-unknown-plan9 exit ;; *:TOPS-10:*:*) echo pdp10-unknown-tops10 exit ;; *:TENEX:*:*) echo pdp10-unknown-tenex exit ;; KS10:TOPS-20:*:* | KL10:TOPS-20:*:* | TYPE4:TOPS-20:*:*) echo pdp10-dec-tops20 exit ;; XKL-1:TOPS-20:*:* | TYPE5:TOPS-20:*:*) echo pdp10-xkl-tops20 exit ;; *:TOPS-20:*:*) echo pdp10-unknown-tops20 exit ;; *:ITS:*:*) echo pdp10-unknown-its exit ;; SEI:*:*:SEIUX) echo mips-sei-seiux"$UNAME_RELEASE" exit ;; *:DragonFly:*:*) echo "$UNAME_MACHINE"-unknown-dragonfly"`echo "$UNAME_RELEASE"|sed -e 's/[-(].*//'`" exit ;; *:*VMS:*:*) UNAME_MACHINE=`(uname -p) 2>/dev/null` case "$UNAME_MACHINE" in A*) echo alpha-dec-vms ; exit ;; I*) echo ia64-dec-vms ; exit ;; V*) echo vax-dec-vms ; exit ;; esac ;; *:XENIX:*:SysV) echo i386-pc-xenix exit ;; i*86:skyos:*:*) echo "$UNAME_MACHINE"-pc-skyos"`echo "$UNAME_RELEASE" | sed -e 's/ .*$//'`" exit ;; i*86:rdos:*:*) echo "$UNAME_MACHINE"-pc-rdos exit ;; i*86:AROS:*:*) echo "$UNAME_MACHINE"-pc-aros exit ;; x86_64:VMkernel:*:*) echo "$UNAME_MACHINE"-unknown-esx exit ;; amd64:Isilon\ OneFS:*:*) echo x86_64-unknown-onefs exit ;; esac echo "$0: unable to guess system type" >&2 case "$UNAME_MACHINE:$UNAME_SYSTEM" in mips:Linux | mips64:Linux) # If we got here on MIPS GNU/Linux, output extra information. cat >&2 <&2 </dev/null || echo unknown` uname -r = `(uname -r) 2>/dev/null || echo unknown` uname -s = `(uname -s) 2>/dev/null || echo unknown` uname -v = `(uname -v) 2>/dev/null || echo unknown` /usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null` /bin/uname -X = `(/bin/uname -X) 2>/dev/null` hostinfo = `(hostinfo) 2>/dev/null` /bin/universe = `(/bin/universe) 2>/dev/null` /usr/bin/arch -k = `(/usr/bin/arch -k) 2>/dev/null` /bin/arch = `(/bin/arch) 2>/dev/null` /usr/bin/oslevel = `(/usr/bin/oslevel) 2>/dev/null` /usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null` UNAME_MACHINE = "$UNAME_MACHINE" UNAME_RELEASE = "$UNAME_RELEASE" UNAME_SYSTEM = "$UNAME_SYSTEM" UNAME_VERSION = "$UNAME_VERSION" EOF exit 1 # Local variables: # eval: (add-hook 'write-file-functions 'time-stamp) # time-stamp-start: "timestamp='" # time-stamp-format: "%:y-%02m-%02d" # time-stamp-end: "'" # End: libev-4.33/config.sub0000744000000000000000000010645013634411656011433 00000000000000#! /bin/sh # Configuration validation subroutine script. # Copyright 1992-2018 Free Software Foundation, Inc. timestamp='2018-02-22' # This file is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, see . # # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under # the same distribution terms that you use for the rest of that # program. This Exception is an additional permission under section 7 # of the GNU General Public License, version 3 ("GPLv3"). # Please send patches to . # # Configuration subroutine to validate and canonicalize a configuration type. # Supply the specified configuration type as an argument. # If it is invalid, we print an error message on stderr and exit with code 1. # Otherwise, we print the canonical config type on stdout and succeed. # You can get the latest version of this script from: # https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub # This file is supposed to be the same for all GNU packages # and recognize all the CPU types, system types and aliases # that are meaningful with *any* GNU software. # Each package is responsible for reporting which valid configurations # it does not support. The user should be able to distinguish # a failure to support a valid configuration from a meaningless # configuration. # The goal of this file is to map all the various variations of a given # machine specification into a single specification in the form: # CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM # or in some cases, the newer four-part form: # CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM # It is wrong to echo any other type of specification. me=`echo "$0" | sed -e 's,.*/,,'` usage="\ Usage: $0 [OPTION] CPU-MFR-OPSYS or ALIAS Canonicalize a configuration name. Options: -h, --help print this help, then exit -t, --time-stamp print date of last modification, then exit -v, --version print version number, then exit Report bugs and patches to ." version="\ GNU config.sub ($timestamp) Copyright 1992-2018 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." help=" Try \`$me --help' for more information." # Parse command line while test $# -gt 0 ; do case $1 in --time-stamp | --time* | -t ) echo "$timestamp" ; exit ;; --version | -v ) echo "$version" ; exit ;; --help | --h* | -h ) echo "$usage"; exit ;; -- ) # Stop option processing shift; break ;; - ) # Use stdin as input. break ;; -* ) echo "$me: invalid option $1$help" exit 1 ;; *local*) # First pass through any local machine types. echo "$1" exit ;; * ) break ;; esac done case $# in 0) echo "$me: missing argument$help" >&2 exit 1;; 1) ;; *) echo "$me: too many arguments$help" >&2 exit 1;; esac # Separate what the user gave into CPU-COMPANY and OS or KERNEL-OS (if any). # Here we must recognize all the valid KERNEL-OS combinations. maybe_os=`echo "$1" | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\2/'` case $maybe_os in nto-qnx* | linux-gnu* | linux-android* | linux-dietlibc | linux-newlib* | \ linux-musl* | linux-uclibc* | uclinux-uclibc* | uclinux-gnu* | kfreebsd*-gnu* | \ knetbsd*-gnu* | netbsd*-gnu* | netbsd*-eabi* | \ kopensolaris*-gnu* | cloudabi*-eabi* | \ storm-chaos* | os2-emx* | rtmk-nova*) os=-$maybe_os basic_machine=`echo "$1" | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'` ;; android-linux) os=-linux-android basic_machine=`echo "$1" | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`-unknown ;; *) basic_machine=`echo "$1" | sed 's/-[^-]*$//'` if [ "$basic_machine" != "$1" ] then os=`echo "$1" | sed 's/.*-/-/'` else os=; fi ;; esac ### Let's recognize common machines as not being operating systems so ### that things like config.sub decstation-3100 work. We also ### recognize some manufacturers as not being operating systems, so we ### can provide default operating systems below. case $os in -sun*os*) # Prevent following clause from handling this invalid input. ;; -dec* | -mips* | -sequent* | -encore* | -pc532* | -sgi* | -sony* | \ -att* | -7300* | -3300* | -delta* | -motorola* | -sun[234]* | \ -unicom* | -ibm* | -next | -hp | -isi* | -apollo | -altos* | \ -convergent* | -ncr* | -news | -32* | -3600* | -3100* | -hitachi* |\ -c[123]* | -convex* | -sun | -crds | -omron* | -dg | -ultra | -tti* | \ -harris | -dolphin | -highlevel | -gould | -cbm | -ns | -masscomp | \ -apple | -axis | -knuth | -cray | -microblaze*) os= basic_machine=$1 ;; -bluegene*) os=-cnk ;; -sim | -cisco | -oki | -wec | -winbond) os= basic_machine=$1 ;; -scout) ;; -wrs) os=-vxworks basic_machine=$1 ;; -chorusos*) os=-chorusos basic_machine=$1 ;; -chorusrdb) os=-chorusrdb basic_machine=$1 ;; -hiux*) os=-hiuxwe2 ;; -sco6) os=-sco5v6 basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -sco5) os=-sco3.2v5 basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -sco4) os=-sco3.2v4 basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -sco3.2.[4-9]*) os=`echo $os | sed -e 's/sco3.2./sco3.2v/'` basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -sco3.2v[4-9]*) # Don't forget version if it is 3.2v4 or newer. basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -sco5v6*) # Don't forget version if it is 3.2v4 or newer. basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -sco*) os=-sco3.2v2 basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -udk*) basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -isc) os=-isc2.2 basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -clix*) basic_machine=clipper-intergraph ;; -isc*) basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'` ;; -lynx*178) os=-lynxos178 ;; -lynx*5) os=-lynxos5 ;; -lynx*) os=-lynxos ;; -ptx*) basic_machine=`echo "$1" | sed -e 's/86-.*/86-sequent/'` ;; -psos*) os=-psos ;; -mint | -mint[0-9]*) basic_machine=m68k-atari os=-mint ;; esac # Decode aliases for certain CPU-COMPANY combinations. case $basic_machine in # Recognize the basic CPU types without company name. # Some are omitted here because they have special meanings below. 1750a | 580 \ | a29k \ | aarch64 | aarch64_be \ | alpha | alphaev[4-8] | alphaev56 | alphaev6[78] | alphapca5[67] \ | alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] | alpha64pca5[67] \ | am33_2.0 \ | arc | arceb \ | arm | arm[bl]e | arme[lb] | armv[2-8] | armv[3-8][lb] | armv7[arm] \ | avr | avr32 \ | ba \ | be32 | be64 \ | bfin \ | c4x | c8051 | clipper \ | d10v | d30v | dlx | dsp16xx \ | e2k | epiphany \ | fido | fr30 | frv | ft32 \ | h8300 | h8500 | hppa | hppa1.[01] | hppa2.0 | hppa2.0[nw] | hppa64 \ | hexagon \ | i370 | i860 | i960 | ia16 | ia64 \ | ip2k | iq2000 \ | k1om \ | le32 | le64 \ | lm32 \ | m32c | m32r | m32rle | m68000 | m68k | m88k \ | maxq | mb | microblaze | microblazeel | mcore | mep | metag \ | mips | mipsbe | mipseb | mipsel | mipsle \ | mips16 \ | mips64 | mips64el \ | mips64octeon | mips64octeonel \ | mips64orion | mips64orionel \ | mips64r5900 | mips64r5900el \ | mips64vr | mips64vrel \ | mips64vr4100 | mips64vr4100el \ | mips64vr4300 | mips64vr4300el \ | mips64vr5000 | mips64vr5000el \ | mips64vr5900 | mips64vr5900el \ | mipsisa32 | mipsisa32el \ | mipsisa32r2 | mipsisa32r2el \ | mipsisa32r6 | mipsisa32r6el \ | mipsisa64 | mipsisa64el \ | mipsisa64r2 | mipsisa64r2el \ | mipsisa64r6 | mipsisa64r6el \ | mipsisa64sb1 | mipsisa64sb1el \ | mipsisa64sr71k | mipsisa64sr71kel \ | mipsr5900 | mipsr5900el \ | mipstx39 | mipstx39el \ | mn10200 | mn10300 \ | moxie \ | mt \ | msp430 \ | nds32 | nds32le | nds32be \ | nios | nios2 | nios2eb | nios2el \ | ns16k | ns32k \ | open8 | or1k | or1knd | or32 \ | pdp10 | pj | pjl \ | powerpc | powerpc64 | powerpc64le | powerpcle \ | pru \ | pyramid \ | riscv32 | riscv64 \ | rl78 | rx \ | score \ | sh | sh[1234] | sh[24]a | sh[24]aeb | sh[23]e | sh[234]eb | sheb | shbe | shle | sh[1234]le | sh3ele \ | sh64 | sh64le \ | sparc | sparc64 | sparc64b | sparc64v | sparc86x | sparclet | sparclite \ | sparcv8 | sparcv9 | sparcv9b | sparcv9v \ | spu \ | tahoe | tic4x | tic54x | tic55x | tic6x | tic80 | tron \ | ubicom32 \ | v850 | v850e | v850e1 | v850e2 | v850es | v850e2v3 \ | visium \ | wasm32 \ | x86 | xc16x | xstormy16 | xtensa \ | z8k | z80) basic_machine=$basic_machine-unknown ;; c54x) basic_machine=tic54x-unknown ;; c55x) basic_machine=tic55x-unknown ;; c6x) basic_machine=tic6x-unknown ;; leon|leon[3-9]) basic_machine=sparc-$basic_machine ;; m6811 | m68hc11 | m6812 | m68hc12 | m68hcs12x | nvptx | picochip) basic_machine=$basic_machine-unknown os=-none ;; m88110 | m680[12346]0 | m683?2 | m68360 | m5200 | v70 | w65) ;; ms1) basic_machine=mt-unknown ;; strongarm | thumb | xscale) basic_machine=arm-unknown ;; xgate) basic_machine=$basic_machine-unknown os=-none ;; xscaleeb) basic_machine=armeb-unknown ;; xscaleel) basic_machine=armel-unknown ;; # We use `pc' rather than `unknown' # because (1) that's what they normally are, and # (2) the word "unknown" tends to confuse beginning users. i*86 | x86_64) basic_machine=$basic_machine-pc ;; # Object if more than one company name word. *-*-*) echo Invalid configuration \`"$1"\': machine \`"$basic_machine"\' not recognized 1>&2 exit 1 ;; # Recognize the basic CPU types with company name. 580-* \ | a29k-* \ | aarch64-* | aarch64_be-* \ | alpha-* | alphaev[4-8]-* | alphaev56-* | alphaev6[78]-* \ | alpha64-* | alpha64ev[4-8]-* | alpha64ev56-* | alpha64ev6[78]-* \ | alphapca5[67]-* | alpha64pca5[67]-* | arc-* | arceb-* \ | arm-* | armbe-* | armle-* | armeb-* | armv*-* \ | avr-* | avr32-* \ | ba-* \ | be32-* | be64-* \ | bfin-* | bs2000-* \ | c[123]* | c30-* | [cjt]90-* | c4x-* \ | c8051-* | clipper-* | craynv-* | cydra-* \ | d10v-* | d30v-* | dlx-* \ | e2k-* | elxsi-* \ | f30[01]-* | f700-* | fido-* | fr30-* | frv-* | fx80-* \ | h8300-* | h8500-* \ | hppa-* | hppa1.[01]-* | hppa2.0-* | hppa2.0[nw]-* | hppa64-* \ | hexagon-* \ | i*86-* | i860-* | i960-* | ia16-* | ia64-* \ | ip2k-* | iq2000-* \ | k1om-* \ | le32-* | le64-* \ | lm32-* \ | m32c-* | m32r-* | m32rle-* \ | m68000-* | m680[012346]0-* | m68360-* | m683?2-* | m68k-* \ | m88110-* | m88k-* | maxq-* | mcore-* | metag-* \ | microblaze-* | microblazeel-* \ | mips-* | mipsbe-* | mipseb-* | mipsel-* | mipsle-* \ | mips16-* \ | mips64-* | mips64el-* \ | mips64octeon-* | mips64octeonel-* \ | mips64orion-* | mips64orionel-* \ | mips64r5900-* | mips64r5900el-* \ | mips64vr-* | mips64vrel-* \ | mips64vr4100-* | mips64vr4100el-* \ | mips64vr4300-* | mips64vr4300el-* \ | mips64vr5000-* | mips64vr5000el-* \ | mips64vr5900-* | mips64vr5900el-* \ | mipsisa32-* | mipsisa32el-* \ | mipsisa32r2-* | mipsisa32r2el-* \ | mipsisa32r6-* | mipsisa32r6el-* \ | mipsisa64-* | mipsisa64el-* \ | mipsisa64r2-* | mipsisa64r2el-* \ | mipsisa64r6-* | mipsisa64r6el-* \ | mipsisa64sb1-* | mipsisa64sb1el-* \ | mipsisa64sr71k-* | mipsisa64sr71kel-* \ | mipsr5900-* | mipsr5900el-* \ | mipstx39-* | mipstx39el-* \ | mmix-* \ | mt-* \ | msp430-* \ | nds32-* | nds32le-* | nds32be-* \ | nios-* | nios2-* | nios2eb-* | nios2el-* \ | none-* | np1-* | ns16k-* | ns32k-* \ | open8-* \ | or1k*-* \ | orion-* \ | pdp10-* | pdp11-* | pj-* | pjl-* | pn-* | power-* \ | powerpc-* | powerpc64-* | powerpc64le-* | powerpcle-* \ | pru-* \ | pyramid-* \ | riscv32-* | riscv64-* \ | rl78-* | romp-* | rs6000-* | rx-* \ | sh-* | sh[1234]-* | sh[24]a-* | sh[24]aeb-* | sh[23]e-* | sh[34]eb-* | sheb-* | shbe-* \ | shle-* | sh[1234]le-* | sh3ele-* | sh64-* | sh64le-* \ | sparc-* | sparc64-* | sparc64b-* | sparc64v-* | sparc86x-* | sparclet-* \ | sparclite-* \ | sparcv8-* | sparcv9-* | sparcv9b-* | sparcv9v-* | sv1-* | sx*-* \ | tahoe-* \ | tic30-* | tic4x-* | tic54x-* | tic55x-* | tic6x-* | tic80-* \ | tile*-* \ | tron-* \ | ubicom32-* \ | v850-* | v850e-* | v850e1-* | v850es-* | v850e2-* | v850e2v3-* \ | vax-* \ | visium-* \ | wasm32-* \ | we32k-* \ | x86-* | x86_64-* | xc16x-* | xps100-* \ | xstormy16-* | xtensa*-* \ | ymp-* \ | z8k-* | z80-*) ;; # Recognize the basic CPU types without company name, with glob match. xtensa*) basic_machine=$basic_machine-unknown ;; # Recognize the various machine names and aliases which stand # for a CPU type and a company and sometimes even an OS. 386bsd) basic_machine=i386-pc os=-bsd ;; 3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc) basic_machine=m68000-att ;; 3b*) basic_machine=we32k-att ;; a29khif) basic_machine=a29k-amd os=-udi ;; abacus) basic_machine=abacus-unknown ;; adobe68k) basic_machine=m68010-adobe os=-scout ;; alliant | fx80) basic_machine=fx80-alliant ;; altos | altos3068) basic_machine=m68k-altos ;; am29k) basic_machine=a29k-none os=-bsd ;; amd64) basic_machine=x86_64-pc ;; amd64-*) basic_machine=x86_64-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; amdahl) basic_machine=580-amdahl os=-sysv ;; amiga | amiga-*) basic_machine=m68k-unknown ;; amigaos | amigados) basic_machine=m68k-unknown os=-amigaos ;; amigaunix | amix) basic_machine=m68k-unknown os=-sysv4 ;; apollo68) basic_machine=m68k-apollo os=-sysv ;; apollo68bsd) basic_machine=m68k-apollo os=-bsd ;; aros) basic_machine=i386-pc os=-aros ;; asmjs) basic_machine=asmjs-unknown ;; aux) basic_machine=m68k-apple os=-aux ;; balance) basic_machine=ns32k-sequent os=-dynix ;; blackfin) basic_machine=bfin-unknown os=-linux ;; blackfin-*) basic_machine=bfin-`echo "$basic_machine" | sed 's/^[^-]*-//'` os=-linux ;; bluegene*) basic_machine=powerpc-ibm os=-cnk ;; c54x-*) basic_machine=tic54x-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; c55x-*) basic_machine=tic55x-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; c6x-*) basic_machine=tic6x-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; c90) basic_machine=c90-cray os=-unicos ;; cegcc) basic_machine=arm-unknown os=-cegcc ;; convex-c1) basic_machine=c1-convex os=-bsd ;; convex-c2) basic_machine=c2-convex os=-bsd ;; convex-c32) basic_machine=c32-convex os=-bsd ;; convex-c34) basic_machine=c34-convex os=-bsd ;; convex-c38) basic_machine=c38-convex os=-bsd ;; cray | j90) basic_machine=j90-cray os=-unicos ;; craynv) basic_machine=craynv-cray os=-unicosmp ;; cr16 | cr16-*) basic_machine=cr16-unknown os=-elf ;; crds | unos) basic_machine=m68k-crds ;; crisv32 | crisv32-* | etraxfs*) basic_machine=crisv32-axis ;; cris | cris-* | etrax*) basic_machine=cris-axis ;; crx) basic_machine=crx-unknown os=-elf ;; da30 | da30-*) basic_machine=m68k-da30 ;; decstation | decstation-3100 | pmax | pmax-* | pmin | dec3100 | decstatn) basic_machine=mips-dec ;; decsystem10* | dec10*) basic_machine=pdp10-dec os=-tops10 ;; decsystem20* | dec20*) basic_machine=pdp10-dec os=-tops20 ;; delta | 3300 | motorola-3300 | motorola-delta \ | 3300-motorola | delta-motorola) basic_machine=m68k-motorola ;; delta88) basic_machine=m88k-motorola os=-sysv3 ;; dicos) basic_machine=i686-pc os=-dicos ;; djgpp) basic_machine=i586-pc os=-msdosdjgpp ;; dpx20 | dpx20-*) basic_machine=rs6000-bull os=-bosx ;; dpx2*) basic_machine=m68k-bull os=-sysv3 ;; e500v[12]) basic_machine=powerpc-unknown os=$os"spe" ;; e500v[12]-*) basic_machine=powerpc-`echo "$basic_machine" | sed 's/^[^-]*-//'` os=$os"spe" ;; ebmon29k) basic_machine=a29k-amd os=-ebmon ;; elxsi) basic_machine=elxsi-elxsi os=-bsd ;; encore | umax | mmax) basic_machine=ns32k-encore ;; es1800 | OSE68k | ose68k | ose | OSE) basic_machine=m68k-ericsson os=-ose ;; fx2800) basic_machine=i860-alliant ;; genix) basic_machine=ns32k-ns ;; gmicro) basic_machine=tron-gmicro os=-sysv ;; go32) basic_machine=i386-pc os=-go32 ;; h3050r* | hiux*) basic_machine=hppa1.1-hitachi os=-hiuxwe2 ;; h8300hms) basic_machine=h8300-hitachi os=-hms ;; h8300xray) basic_machine=h8300-hitachi os=-xray ;; h8500hms) basic_machine=h8500-hitachi os=-hms ;; harris) basic_machine=m88k-harris os=-sysv3 ;; hp300-*) basic_machine=m68k-hp ;; hp300bsd) basic_machine=m68k-hp os=-bsd ;; hp300hpux) basic_machine=m68k-hp os=-hpux ;; hp3k9[0-9][0-9] | hp9[0-9][0-9]) basic_machine=hppa1.0-hp ;; hp9k2[0-9][0-9] | hp9k31[0-9]) basic_machine=m68000-hp ;; hp9k3[2-9][0-9]) basic_machine=m68k-hp ;; hp9k6[0-9][0-9] | hp6[0-9][0-9]) basic_machine=hppa1.0-hp ;; hp9k7[0-79][0-9] | hp7[0-79][0-9]) basic_machine=hppa1.1-hp ;; hp9k78[0-9] | hp78[0-9]) # FIXME: really hppa2.0-hp basic_machine=hppa1.1-hp ;; hp9k8[67]1 | hp8[67]1 | hp9k80[24] | hp80[24] | hp9k8[78]9 | hp8[78]9 | hp9k893 | hp893) # FIXME: really hppa2.0-hp basic_machine=hppa1.1-hp ;; hp9k8[0-9][13679] | hp8[0-9][13679]) basic_machine=hppa1.1-hp ;; hp9k8[0-9][0-9] | hp8[0-9][0-9]) basic_machine=hppa1.0-hp ;; hppaosf) basic_machine=hppa1.1-hp os=-osf ;; hppro) basic_machine=hppa1.1-hp os=-proelf ;; i370-ibm* | ibm*) basic_machine=i370-ibm ;; i*86v32) basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'` os=-sysv32 ;; i*86v4*) basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'` os=-sysv4 ;; i*86v) basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'` os=-sysv ;; i*86sol2) basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'` os=-solaris2 ;; i386mach) basic_machine=i386-mach os=-mach ;; vsta) basic_machine=i386-unknown os=-vsta ;; iris | iris4d) basic_machine=mips-sgi case $os in -irix*) ;; *) os=-irix4 ;; esac ;; isi68 | isi) basic_machine=m68k-isi os=-sysv ;; leon-*|leon[3-9]-*) basic_machine=sparc-`echo "$basic_machine" | sed 's/-.*//'` ;; m68knommu) basic_machine=m68k-unknown os=-linux ;; m68knommu-*) basic_machine=m68k-`echo "$basic_machine" | sed 's/^[^-]*-//'` os=-linux ;; magnum | m3230) basic_machine=mips-mips os=-sysv ;; merlin) basic_machine=ns32k-utek os=-sysv ;; microblaze*) basic_machine=microblaze-xilinx ;; mingw64) basic_machine=x86_64-pc os=-mingw64 ;; mingw32) basic_machine=i686-pc os=-mingw32 ;; mingw32ce) basic_machine=arm-unknown os=-mingw32ce ;; miniframe) basic_machine=m68000-convergent ;; *mint | -mint[0-9]* | *MiNT | *MiNT[0-9]*) basic_machine=m68k-atari os=-mint ;; mips3*-*) basic_machine=`echo "$basic_machine" | sed -e 's/mips3/mips64/'` ;; mips3*) basic_machine=`echo "$basic_machine" | sed -e 's/mips3/mips64/'`-unknown ;; monitor) basic_machine=m68k-rom68k os=-coff ;; morphos) basic_machine=powerpc-unknown os=-morphos ;; moxiebox) basic_machine=moxie-unknown os=-moxiebox ;; msdos) basic_machine=i386-pc os=-msdos ;; ms1-*) basic_machine=`echo "$basic_machine" | sed -e 's/ms1-/mt-/'` ;; msys) basic_machine=i686-pc os=-msys ;; mvs) basic_machine=i370-ibm os=-mvs ;; nacl) basic_machine=le32-unknown os=-nacl ;; ncr3000) basic_machine=i486-ncr os=-sysv4 ;; netbsd386) basic_machine=i386-unknown os=-netbsd ;; netwinder) basic_machine=armv4l-rebel os=-linux ;; news | news700 | news800 | news900) basic_machine=m68k-sony os=-newsos ;; news1000) basic_machine=m68030-sony os=-newsos ;; news-3600 | risc-news) basic_machine=mips-sony os=-newsos ;; necv70) basic_machine=v70-nec os=-sysv ;; next | m*-next) basic_machine=m68k-next case $os in -nextstep* ) ;; -ns2*) os=-nextstep2 ;; *) os=-nextstep3 ;; esac ;; nh3000) basic_machine=m68k-harris os=-cxux ;; nh[45]000) basic_machine=m88k-harris os=-cxux ;; nindy960) basic_machine=i960-intel os=-nindy ;; mon960) basic_machine=i960-intel os=-mon960 ;; nonstopux) basic_machine=mips-compaq os=-nonstopux ;; np1) basic_machine=np1-gould ;; neo-tandem) basic_machine=neo-tandem ;; nse-tandem) basic_machine=nse-tandem ;; nsr-tandem) basic_machine=nsr-tandem ;; nsv-tandem) basic_machine=nsv-tandem ;; nsx-tandem) basic_machine=nsx-tandem ;; op50n-* | op60c-*) basic_machine=hppa1.1-oki os=-proelf ;; openrisc | openrisc-*) basic_machine=or32-unknown ;; os400) basic_machine=powerpc-ibm os=-os400 ;; OSE68000 | ose68000) basic_machine=m68000-ericsson os=-ose ;; os68k) basic_machine=m68k-none os=-os68k ;; pa-hitachi) basic_machine=hppa1.1-hitachi os=-hiuxwe2 ;; paragon) basic_machine=i860-intel os=-osf ;; parisc) basic_machine=hppa-unknown os=-linux ;; parisc-*) basic_machine=hppa-`echo "$basic_machine" | sed 's/^[^-]*-//'` os=-linux ;; pbd) basic_machine=sparc-tti ;; pbb) basic_machine=m68k-tti ;; pc532 | pc532-*) basic_machine=ns32k-pc532 ;; pc98) basic_machine=i386-pc ;; pc98-*) basic_machine=i386-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; pentium | p5 | k5 | k6 | nexgen | viac3) basic_machine=i586-pc ;; pentiumpro | p6 | 6x86 | athlon | athlon_*) basic_machine=i686-pc ;; pentiumii | pentium2 | pentiumiii | pentium3) basic_machine=i686-pc ;; pentium4) basic_machine=i786-pc ;; pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*) basic_machine=i586-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; pentiumpro-* | p6-* | 6x86-* | athlon-*) basic_machine=i686-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*) basic_machine=i686-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; pentium4-*) basic_machine=i786-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; pn) basic_machine=pn-gould ;; power) basic_machine=power-ibm ;; ppc | ppcbe) basic_machine=powerpc-unknown ;; ppc-* | ppcbe-*) basic_machine=powerpc-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; ppcle | powerpclittle) basic_machine=powerpcle-unknown ;; ppcle-* | powerpclittle-*) basic_machine=powerpcle-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; ppc64) basic_machine=powerpc64-unknown ;; ppc64-*) basic_machine=powerpc64-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; ppc64le | powerpc64little) basic_machine=powerpc64le-unknown ;; ppc64le-* | powerpc64little-*) basic_machine=powerpc64le-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; ps2) basic_machine=i386-ibm ;; pw32) basic_machine=i586-unknown os=-pw32 ;; rdos | rdos64) basic_machine=x86_64-pc os=-rdos ;; rdos32) basic_machine=i386-pc os=-rdos ;; rom68k) basic_machine=m68k-rom68k os=-coff ;; rm[46]00) basic_machine=mips-siemens ;; rtpc | rtpc-*) basic_machine=romp-ibm ;; s390 | s390-*) basic_machine=s390-ibm ;; s390x | s390x-*) basic_machine=s390x-ibm ;; sa29200) basic_machine=a29k-amd os=-udi ;; sb1) basic_machine=mipsisa64sb1-unknown ;; sb1el) basic_machine=mipsisa64sb1el-unknown ;; sde) basic_machine=mipsisa32-sde os=-elf ;; sei) basic_machine=mips-sei os=-seiux ;; sequent) basic_machine=i386-sequent ;; sh5el) basic_machine=sh5le-unknown ;; simso-wrs) basic_machine=sparclite-wrs os=-vxworks ;; sps7) basic_machine=m68k-bull os=-sysv2 ;; spur) basic_machine=spur-unknown ;; st2000) basic_machine=m68k-tandem ;; stratus) basic_machine=i860-stratus os=-sysv4 ;; strongarm-* | thumb-*) basic_machine=arm-`echo "$basic_machine" | sed 's/^[^-]*-//'` ;; sun2) basic_machine=m68000-sun ;; sun2os3) basic_machine=m68000-sun os=-sunos3 ;; sun2os4) basic_machine=m68000-sun os=-sunos4 ;; sun3os3) basic_machine=m68k-sun os=-sunos3 ;; sun3os4) basic_machine=m68k-sun os=-sunos4 ;; sun4os3) basic_machine=sparc-sun os=-sunos3 ;; sun4os4) basic_machine=sparc-sun os=-sunos4 ;; sun4sol2) basic_machine=sparc-sun os=-solaris2 ;; sun3 | sun3-*) basic_machine=m68k-sun ;; sun4) basic_machine=sparc-sun ;; sun386 | sun386i | roadrunner) basic_machine=i386-sun ;; sv1) basic_machine=sv1-cray os=-unicos ;; symmetry) basic_machine=i386-sequent os=-dynix ;; t3e) basic_machine=alphaev5-cray os=-unicos ;; t90) basic_machine=t90-cray os=-unicos ;; tile*) basic_machine=$basic_machine-unknown os=-linux-gnu ;; tx39) basic_machine=mipstx39-unknown ;; tx39el) basic_machine=mipstx39el-unknown ;; toad1) basic_machine=pdp10-xkl os=-tops20 ;; tower | tower-32) basic_machine=m68k-ncr ;; tpf) basic_machine=s390x-ibm os=-tpf ;; udi29k) basic_machine=a29k-amd os=-udi ;; ultra3) basic_machine=a29k-nyu os=-sym1 ;; v810 | necv810) basic_machine=v810-nec os=-none ;; vaxv) basic_machine=vax-dec os=-sysv ;; vms) basic_machine=vax-dec os=-vms ;; vpp*|vx|vx-*) basic_machine=f301-fujitsu ;; vxworks960) basic_machine=i960-wrs os=-vxworks ;; vxworks68) basic_machine=m68k-wrs os=-vxworks ;; vxworks29k) basic_machine=a29k-wrs os=-vxworks ;; w65*) basic_machine=w65-wdc os=-none ;; w89k-*) basic_machine=hppa1.1-winbond os=-proelf ;; x64) basic_machine=x86_64-pc ;; xbox) basic_machine=i686-pc os=-mingw32 ;; xps | xps100) basic_machine=xps100-honeywell ;; xscale-* | xscalee[bl]-*) basic_machine=`echo "$basic_machine" | sed 's/^xscale/arm/'` ;; ymp) basic_machine=ymp-cray os=-unicos ;; none) basic_machine=none-none os=-none ;; # Here we handle the default manufacturer of certain CPU types. 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See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program. If not, see . # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under # the same distribution terms that you use for the rest of that program. # Originally written by Alexandre Oliva . case $1 in '') echo "$0: No command. Try '$0 --help' for more information." 1>&2 exit 1; ;; -h | --h*) cat <<\EOF Usage: depcomp [--help] [--version] PROGRAM [ARGS] Run PROGRAMS ARGS to compile a file, generating dependencies as side-effects. Environment variables: depmode Dependency tracking mode. source Source file read by 'PROGRAMS ARGS'. object Object file output by 'PROGRAMS ARGS'. DEPDIR directory where to store dependencies. depfile Dependency file to output. tmpdepfile Temporary file to use when outputting dependencies. libtool Whether libtool is used (yes/no). Report bugs to . EOF exit $? ;; -v | --v*) echo "depcomp $scriptversion" exit $? ;; esac # Get the directory component of the given path, and save it in the # global variables '$dir'. Note that this directory component will # be either empty or ending with a '/' character. This is deliberate. set_dir_from () { case $1 in */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;; *) dir=;; esac } # Get the suffix-stripped basename of the given path, and save it the # global variable '$base'. set_base_from () { base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'` } # If no dependency file was actually created by the compiler invocation, # we still have to create a dummy depfile, to avoid errors with the # Makefile "include basename.Plo" scheme. make_dummy_depfile () { echo "#dummy" > "$depfile" } # Factor out some common post-processing of the generated depfile. # Requires the auxiliary global variable '$tmpdepfile' to be set. aix_post_process_depfile () { # If the compiler actually managed to produce a dependency file, # post-process it. if test -f "$tmpdepfile"; then # Each line is of the form 'foo.o: dependency.h'. # Do two passes, one to just change these to # $object: dependency.h # and one to simply output # dependency.h: # which is needed to avoid the deleted-header problem. { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile" sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile" } > "$depfile" rm -f "$tmpdepfile" else make_dummy_depfile fi } # A tabulation character. tab=' ' # A newline character. nl=' ' # Character ranges might be problematic outside the C locale. # These definitions help. upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ lower=abcdefghijklmnopqrstuvwxyz digits=0123456789 alpha=${upper}${lower} if test -z "$depmode" || test -z "$source" || test -z "$object"; then echo "depcomp: Variables source, object and depmode must be set" 1>&2 exit 1 fi # Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po. depfile=${depfile-`echo "$object" | sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`} tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`} rm -f "$tmpdepfile" # Avoid interferences from the environment. gccflag= dashmflag= # Some modes work just like other modes, but use different flags. We # parameterize here, but still list the modes in the big case below, # to make depend.m4 easier to write. Note that we *cannot* use a case # here, because this file can only contain one case statement. if test "$depmode" = hp; then # HP compiler uses -M and no extra arg. gccflag=-M depmode=gcc fi if test "$depmode" = dashXmstdout; then # This is just like dashmstdout with a different argument. dashmflag=-xM depmode=dashmstdout fi cygpath_u="cygpath -u -f -" if test "$depmode" = msvcmsys; then # This is just like msvisualcpp but w/o cygpath translation. # Just convert the backslash-escaped backslashes to single forward # slashes to satisfy depend.m4 cygpath_u='sed s,\\\\,/,g' depmode=msvisualcpp fi if test "$depmode" = msvc7msys; then # This is just like msvc7 but w/o cygpath translation. # Just convert the backslash-escaped backslashes to single forward # slashes to satisfy depend.m4 cygpath_u='sed s,\\\\,/,g' depmode=msvc7 fi if test "$depmode" = xlc; then # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information. gccflag=-qmakedep=gcc,-MF depmode=gcc fi case "$depmode" in gcc3) ## gcc 3 implements dependency tracking that does exactly what ## we want. Yay! Note: for some reason libtool 1.4 doesn't like ## it if -MD -MP comes after the -MF stuff. Hmm. ## Unfortunately, FreeBSD c89 acceptance of flags depends upon ## the command line argument order; so add the flags where they ## appear in depend2.am. Note that the slowdown incurred here ## affects only configure: in makefiles, %FASTDEP% shortcuts this. for arg do case $arg in -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;; *) set fnord "$@" "$arg" ;; esac shift # fnord shift # $arg done "$@" stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi mv "$tmpdepfile" "$depfile" ;; gcc) ## Note that this doesn't just cater to obsosete pre-3.x GCC compilers. ## but also to in-use compilers like IMB xlc/xlC and the HP C compiler. ## (see the conditional assignment to $gccflag above). ## There are various ways to get dependency output from gcc. Here's ## why we pick this rather obscure method: ## - Don't want to use -MD because we'd like the dependencies to end ## up in a subdir. Having to rename by hand is ugly. ## (We might end up doing this anyway to support other compilers.) ## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like ## -MM, not -M (despite what the docs say). Also, it might not be ## supported by the other compilers which use the 'gcc' depmode. ## - Using -M directly means running the compiler twice (even worse ## than renaming). if test -z "$gccflag"; then gccflag=-MD, fi "$@" -Wp,"$gccflag$tmpdepfile" stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" echo "$object : \\" > "$depfile" # The second -e expression handles DOS-style file names with drive # letters. sed -e 's/^[^:]*: / /' \ -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile" ## This next piece of magic avoids the "deleted header file" problem. ## The problem is that when a header file which appears in a .P file ## is deleted, the dependency causes make to die (because there is ## typically no way to rebuild the header). We avoid this by adding ## dummy dependencies for each header file. Too bad gcc doesn't do ## this for us directly. ## Some versions of gcc put a space before the ':'. On the theory ## that the space means something, we add a space to the output as ## well. hp depmode also adds that space, but also prefixes the VPATH ## to the object. Take care to not repeat it in the output. ## Some versions of the HPUX 10.20 sed can't process this invocation ## correctly. Breaking it into two sed invocations is a workaround. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \ | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; hp) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; sgi) if test "$libtool" = yes; then "$@" "-Wp,-MDupdate,$tmpdepfile" else "$@" -MDupdate "$tmpdepfile" fi stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" if test -f "$tmpdepfile"; then # yes, the sourcefile depend on other files echo "$object : \\" > "$depfile" # Clip off the initial element (the dependent). Don't try to be # clever and replace this with sed code, as IRIX sed won't handle # lines with more than a fixed number of characters (4096 in # IRIX 6.2 sed, 8192 in IRIX 6.5). We also remove comment lines; # the IRIX cc adds comments like '#:fec' to the end of the # dependency line. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \ | tr "$nl" ' ' >> "$depfile" echo >> "$depfile" # The second pass generates a dummy entry for each header file. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \ >> "$depfile" else make_dummy_depfile fi rm -f "$tmpdepfile" ;; xlc) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; aix) # The C for AIX Compiler uses -M and outputs the dependencies # in a .u file. In older versions, this file always lives in the # current directory. Also, the AIX compiler puts '$object:' at the # start of each line; $object doesn't have directory information. # Version 6 uses the directory in both cases. set_dir_from "$object" set_base_from "$object" if test "$libtool" = yes; then tmpdepfile1=$dir$base.u tmpdepfile2=$base.u tmpdepfile3=$dir.libs/$base.u "$@" -Wc,-M else tmpdepfile1=$dir$base.u tmpdepfile2=$dir$base.u tmpdepfile3=$dir$base.u "$@" -M fi stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" exit $stat fi for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" do test -f "$tmpdepfile" && break done aix_post_process_depfile ;; tcc) # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26 # FIXME: That version still under development at the moment of writing. # Make that this statement remains true also for stable, released # versions. # It will wrap lines (doesn't matter whether long or short) with a # trailing '\', as in: # # foo.o : \ # foo.c \ # foo.h \ # # It will put a trailing '\' even on the last line, and will use leading # spaces rather than leading tabs (at least since its commit 0394caf7 # "Emit spaces for -MD"). "$@" -MD -MF "$tmpdepfile" stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'. # We have to change lines of the first kind to '$object: \'. sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile" # And for each line of the second kind, we have to emit a 'dep.h:' # dummy dependency, to avoid the deleted-header problem. sed -n -e 's|^ *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile" rm -f "$tmpdepfile" ;; ## The order of this option in the case statement is important, since the ## shell code in configure will try each of these formats in the order ## listed in this file. A plain '-MD' option would be understood by many ## compilers, so we must ensure this comes after the gcc and icc options. pgcc) # Portland's C compiler understands '-MD'. # Will always output deps to 'file.d' where file is the root name of the # source file under compilation, even if file resides in a subdirectory. # The object file name does not affect the name of the '.d' file. # pgcc 10.2 will output # foo.o: sub/foo.c sub/foo.h # and will wrap long lines using '\' : # foo.o: sub/foo.c ... \ # sub/foo.h ... \ # ... set_dir_from "$object" # Use the source, not the object, to determine the base name, since # that's sadly what pgcc will do too. set_base_from "$source" tmpdepfile=$base.d # For projects that build the same source file twice into different object # files, the pgcc approach of using the *source* file root name can cause # problems in parallel builds. Use a locking strategy to avoid stomping on # the same $tmpdepfile. lockdir=$base.d-lock trap " echo '$0: caught signal, cleaning up...' >&2 rmdir '$lockdir' exit 1 " 1 2 13 15 numtries=100 i=$numtries while test $i -gt 0; do # mkdir is a portable test-and-set. if mkdir "$lockdir" 2>/dev/null; then # This process acquired the lock. 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Vaughan, 2004 # Copyright (C) 2004-2015 Free Software Foundation, Inc. # This is free software; see the source for copying conditions. There is NO # warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 3 of the License, or # (at your option) any later version. # As a special exception to the GNU General Public License, if you distribute # this file as part of a program or library that is built using GNU Libtool, # you may include this file under the same distribution terms that you use # for the rest of that program. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNES FOR A PARTICULAR PURPOSE. See the GNU # General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program. If not, see . # Please report bugs or propose patches to gary@gnu.org. ## ------ ## ## Usage. ## ## ------ ## # Evaluate this file near the top of your script to gain access to # the functions and variables defined here: # # . `echo "$0" | ${SED-sed} 's|[^/]*$||'`/build-aux/funclib.sh # # If you need to override any of the default environment variable # settings, do that before evaluating this file. ## -------------------- ## ## Shell normalisation. ## ## -------------------- ## # Some shells need a little help to be as Bourne compatible as possible. # Before doing anything else, make sure all that help has been provided! DUALCASE=1; export DUALCASE # for MKS sh if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then : emulate sh NULLCMD=: # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which # is contrary to our usage. Disable this feature. alias -g '${1+"$@"}'='"$@"' setopt NO_GLOB_SUBST else case `(set -o) 2>/dev/null` in *posix*) set -o posix ;; esac fi # NLS nuisances: We save the old values in case they are required later. _G_user_locale= _G_safe_locale= for _G_var in LANG LANGUAGE LC_ALL LC_CTYPE LC_COLLATE LC_MESSAGES do eval "if test set = \"\${$_G_var+set}\"; then save_$_G_var=\$$_G_var $_G_var=C export $_G_var _G_user_locale=\"$_G_var=\\\$save_\$_G_var; \$_G_user_locale\" _G_safe_locale=\"$_G_var=C; \$_G_safe_locale\" fi" done # CDPATH. (unset CDPATH) >/dev/null 2>&1 && unset CDPATH # Make sure IFS has a sensible default sp=' ' nl=' ' IFS="$sp $nl" # There are apparently some retarded systems that use ';' as a PATH separator! if test "${PATH_SEPARATOR+set}" != set; then PATH_SEPARATOR=: (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 || PATH_SEPARATOR=';' } fi ## ------------------------- ## ## Locate command utilities. ## ## ------------------------- ## # func_executable_p FILE # ---------------------- # Check that FILE is an executable regular file. func_executable_p () { test -f "$1" && test -x "$1" } # func_path_progs PROGS_LIST CHECK_FUNC [PATH] # -------------------------------------------- # Search for either a program that responds to --version with output # containing "GNU", or else returned by CHECK_FUNC otherwise, by # trying all the directories in PATH with each of the elements of # PROGS_LIST. # # CHECK_FUNC should accept the path to a candidate program, and # set $func_check_prog_result if it truncates its output less than # $_G_path_prog_max characters. func_path_progs () { _G_progs_list=$1 _G_check_func=$2 _G_PATH=${3-"$PATH"} _G_path_prog_max=0 _G_path_prog_found=false _G_save_IFS=$IFS; IFS=${PATH_SEPARATOR-:} for _G_dir in $_G_PATH; do IFS=$_G_save_IFS test -z "$_G_dir" && _G_dir=. for _G_prog_name in $_G_progs_list; do for _exeext in '' .EXE; do _G_path_prog=$_G_dir/$_G_prog_name$_exeext func_executable_p "$_G_path_prog" || continue case `"$_G_path_prog" --version 2>&1` in *GNU*) func_path_progs_result=$_G_path_prog _G_path_prog_found=: ;; *) $_G_check_func $_G_path_prog func_path_progs_result=$func_check_prog_result ;; esac $_G_path_prog_found && break 3 done done done IFS=$_G_save_IFS test -z "$func_path_progs_result" && { echo "no acceptable sed could be found in \$PATH" >&2 exit 1 } } # We want to be able to use the functions in this file before configure # has figured out where the best binaries are kept, which means we have # to search for them ourselves - except when the results are already set # where we skip the searches. # Unless the user overrides by setting SED, search the path for either GNU # sed, or the sed that truncates its output the least. test -z "$SED" && { _G_sed_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/ for _G_i in 1 2 3 4 5 6 7; do _G_sed_script=$_G_sed_script$nl$_G_sed_script done echo "$_G_sed_script" 2>/dev/null | sed 99q >conftest.sed _G_sed_script= func_check_prog_sed () { _G_path_prog=$1 _G_count=0 printf 0123456789 >conftest.in while : do cat conftest.in conftest.in >conftest.tmp mv conftest.tmp conftest.in cp conftest.in conftest.nl echo '' >> conftest.nl "$_G_path_prog" -f conftest.sed conftest.out 2>/dev/null || break diff conftest.out conftest.nl >/dev/null 2>&1 || break _G_count=`expr $_G_count + 1` if test "$_G_count" -gt "$_G_path_prog_max"; then # Best one so far, save it but keep looking for a better one func_check_prog_result=$_G_path_prog _G_path_prog_max=$_G_count fi # 10*(2^10) chars as input seems more than enough test 10 -lt "$_G_count" && break done rm -f conftest.in conftest.tmp conftest.nl conftest.out } func_path_progs "sed gsed" func_check_prog_sed $PATH:/usr/xpg4/bin rm -f conftest.sed SED=$func_path_progs_result } # Unless the user overrides by setting GREP, search the path for either GNU # grep, or the grep that truncates its output the least. test -z "$GREP" && { func_check_prog_grep () { _G_path_prog=$1 _G_count=0 _G_path_prog_max=0 printf 0123456789 >conftest.in while : do cat conftest.in conftest.in >conftest.tmp mv conftest.tmp conftest.in cp conftest.in conftest.nl echo 'GREP' >> conftest.nl "$_G_path_prog" -e 'GREP$' -e '-(cannot match)-' conftest.out 2>/dev/null || break diff conftest.out conftest.nl >/dev/null 2>&1 || break _G_count=`expr $_G_count + 1` if test "$_G_count" -gt "$_G_path_prog_max"; then # Best one so far, save it but keep looking for a better one func_check_prog_result=$_G_path_prog _G_path_prog_max=$_G_count fi # 10*(2^10) chars as input seems more than enough test 10 -lt "$_G_count" && break done rm -f conftest.in conftest.tmp conftest.nl conftest.out } func_path_progs "grep ggrep" func_check_prog_grep $PATH:/usr/xpg4/bin GREP=$func_path_progs_result } ## ------------------------------- ## ## User overridable command paths. ## ## ------------------------------- ## # All uppercase variable names are used for environment variables. These # variables can be overridden by the user before calling a script that # uses them if a suitable command of that name is not already available # in the command search PATH. : ${CP="cp -f"} : ${ECHO="printf %s\n"} : ${EGREP="$GREP -E"} : ${FGREP="$GREP -F"} : ${LN_S="ln -s"} : ${MAKE="make"} : ${MKDIR="mkdir"} : ${MV="mv -f"} : ${RM="rm -f"} : ${SHELL="${CONFIG_SHELL-/bin/sh}"} ## -------------------- ## ## Useful sed snippets. ## ## -------------------- ## sed_dirname='s|/[^/]*$||' sed_basename='s|^.*/||' # Sed substitution that helps us do robust quoting. It backslashifies # metacharacters that are still active within double-quoted strings. sed_quote_subst='s|\([`"$\\]\)|\\\1|g' # Same as above, but do not quote variable references. sed_double_quote_subst='s/\(["`\\]\)/\\\1/g' # Sed substitution that turns a string into a regex matching for the # string literally. sed_make_literal_regex='s|[].[^$\\*\/]|\\&|g' # Sed substitution that converts a w32 file name or path # that contains forward slashes, into one that contains # (escaped) backslashes. A very naive implementation. sed_naive_backslashify='s|\\\\*|\\|g;s|/|\\|g;s|\\|\\\\|g' # Re-'\' parameter expansions in output of sed_double_quote_subst that # were '\'-ed in input to the same. If an odd number of '\' preceded a # '$' in input to sed_double_quote_subst, that '$' was protected from # expansion. Since each input '\' is now two '\'s, look for any number # of runs of four '\'s followed by two '\'s and then a '$'. '\' that '$'. _G_bs='\\' _G_bs2='\\\\' _G_bs4='\\\\\\\\' _G_dollar='\$' sed_double_backslash="\ s/$_G_bs4/&\\ /g s/^$_G_bs2$_G_dollar/$_G_bs&/ s/\\([^$_G_bs]\\)$_G_bs2$_G_dollar/\\1$_G_bs2$_G_bs$_G_dollar/g s/\n//g" ## ----------------- ## ## Global variables. ## ## ----------------- ## # Except for the global variables explicitly listed below, the following # functions in the '^func_' namespace, and the '^require_' namespace # variables initialised in the 'Resource management' section, sourcing # this file will not pollute your global namespace with anything # else. There's no portable way to scope variables in Bourne shell # though, so actually running these functions will sometimes place # results into a variable named after the function, and often use # temporary variables in the '^_G_' namespace. If you are careful to # avoid using those namespaces casually in your sourcing script, things # should continue to work as you expect. And, of course, you can freely # overwrite any of the functions or variables defined here before # calling anything to customize them. EXIT_SUCCESS=0 EXIT_FAILURE=1 EXIT_MISMATCH=63 # $? = 63 is used to indicate version mismatch to missing. EXIT_SKIP=77 # $? = 77 is used to indicate a skipped test to automake. # Allow overriding, eg assuming that you follow the convention of # putting '$debug_cmd' at the start of all your functions, you can get # bash to show function call trace with: # # debug_cmd='eval echo "${FUNCNAME[0]} $*" >&2' bash your-script-name debug_cmd=${debug_cmd-":"} exit_cmd=: # By convention, finish your script with: # # exit $exit_status # # so that you can set exit_status to non-zero if you want to indicate # something went wrong during execution without actually bailing out at # the point of failure. exit_status=$EXIT_SUCCESS # Work around backward compatibility issue on IRIX 6.5. On IRIX 6.4+, sh # is ksh but when the shell is invoked as "sh" and the current value of # the _XPG environment variable is not equal to 1 (one), the special # positional parameter $0, within a function call, is the name of the # function. progpath=$0 # The name of this program. progname=`$ECHO "$progpath" |$SED "$sed_basename"` # Make sure we have an absolute progpath for reexecution: case $progpath in [\\/]*|[A-Za-z]:\\*) ;; *[\\/]*) progdir=`$ECHO "$progpath" |$SED "$sed_dirname"` progdir=`cd "$progdir" && pwd` progpath=$progdir/$progname ;; *) _G_IFS=$IFS IFS=${PATH_SEPARATOR-:} for progdir in $PATH; do IFS=$_G_IFS test -x "$progdir/$progname" && break done IFS=$_G_IFS test -n "$progdir" || progdir=`pwd` progpath=$progdir/$progname ;; esac ## ----------------- ## ## Standard options. ## ## ----------------- ## # The following options affect the operation of the functions defined # below, and should be set appropriately depending on run-time para- # meters passed on the command line. opt_dry_run=false opt_quiet=false opt_verbose=false # Categories 'all' and 'none' are always available. Append any others # you will pass as the first argument to func_warning from your own # code. warning_categories= # By default, display warnings according to 'opt_warning_types'. Set # 'warning_func' to ':' to elide all warnings, or func_fatal_error to # treat the next displayed warning as a fatal error. warning_func=func_warn_and_continue # Set to 'all' to display all warnings, 'none' to suppress all # warnings, or a space delimited list of some subset of # 'warning_categories' to display only the listed warnings. opt_warning_types=all ## -------------------- ## ## Resource management. ## ## -------------------- ## # This section contains definitions for functions that each ensure a # particular resource (a file, or a non-empty configuration variable for # example) is available, and if appropriate to extract default values # from pertinent package files. Call them using their associated # 'require_*' variable to ensure that they are executed, at most, once. # # It's entirely deliberate that calling these functions can set # variables that don't obey the namespace limitations obeyed by the rest # of this file, in order that that they be as useful as possible to # callers. # require_term_colors # ------------------- # Allow display of bold text on terminals that support it. require_term_colors=func_require_term_colors func_require_term_colors () { $debug_cmd test -t 1 && { # COLORTERM and USE_ANSI_COLORS environment variables take # precedence, because most terminfo databases neglect to describe # whether color sequences are supported. test -n "${COLORTERM+set}" && : ${USE_ANSI_COLORS="1"} if test 1 = "$USE_ANSI_COLORS"; then # Standard ANSI escape sequences tc_reset='' tc_bold=''; tc_standout='' tc_red=''; tc_green='' tc_blue=''; tc_cyan='' else # Otherwise trust the terminfo database after all. test -n "`tput sgr0 2>/dev/null`" && { tc_reset=`tput sgr0` test -n "`tput bold 2>/dev/null`" && tc_bold=`tput bold` tc_standout=$tc_bold test -n "`tput smso 2>/dev/null`" && tc_standout=`tput smso` test -n "`tput setaf 1 2>/dev/null`" && tc_red=`tput setaf 1` test -n "`tput setaf 2 2>/dev/null`" && tc_green=`tput setaf 2` test -n "`tput setaf 4 2>/dev/null`" && tc_blue=`tput setaf 4` test -n "`tput setaf 5 2>/dev/null`" && tc_cyan=`tput setaf 5` } fi } require_term_colors=: } ## ----------------- ## ## Function library. ## ## ----------------- ## # This section contains a variety of useful functions to call in your # scripts. Take note of the portable wrappers for features provided by # some modern shells, which will fall back to slower equivalents on # less featureful shells. # func_append VAR VALUE # --------------------- # Append VALUE onto the existing contents of VAR. # We should try to minimise forks, especially on Windows where they are # unreasonably slow, so skip the feature probes when bash or zsh are # being used: if test set = "${BASH_VERSION+set}${ZSH_VERSION+set}"; then : ${_G_HAVE_ARITH_OP="yes"} : ${_G_HAVE_XSI_OPS="yes"} # The += operator was introduced in bash 3.1 case $BASH_VERSION in [12].* | 3.0 | 3.0*) ;; *) : ${_G_HAVE_PLUSEQ_OP="yes"} ;; esac fi # _G_HAVE_PLUSEQ_OP # Can be empty, in which case the shell is probed, "yes" if += is # useable or anything else if it does not work. test -z "$_G_HAVE_PLUSEQ_OP" \ && (eval 'x=a; x+=" b"; test "a b" = "$x"') 2>/dev/null \ && _G_HAVE_PLUSEQ_OP=yes if test yes = "$_G_HAVE_PLUSEQ_OP" then # This is an XSI compatible shell, allowing a faster implementation... eval 'func_append () { $debug_cmd eval "$1+=\$2" }' else # ...otherwise fall back to using expr, which is often a shell builtin. func_append () { $debug_cmd eval "$1=\$$1\$2" } fi # func_append_quoted VAR VALUE # ---------------------------- # Quote VALUE and append to the end of shell variable VAR, separated # by a space. if test yes = "$_G_HAVE_PLUSEQ_OP"; then eval 'func_append_quoted () { $debug_cmd func_quote_for_eval "$2" eval "$1+=\\ \$func_quote_for_eval_result" }' else func_append_quoted () { $debug_cmd func_quote_for_eval "$2" eval "$1=\$$1\\ \$func_quote_for_eval_result" } fi # func_append_uniq VAR VALUE # -------------------------- # Append unique VALUE onto the existing contents of VAR, assuming # entries are delimited by the first character of VALUE. For example: # # func_append_uniq options " --another-option option-argument" # # will only append to $options if " --another-option option-argument " # is not already present somewhere in $options already (note spaces at # each end implied by leading space in second argument). func_append_uniq () { $debug_cmd eval _G_current_value='`$ECHO $'$1'`' _G_delim=`expr "$2" : '\(.\)'` case $_G_delim$_G_current_value$_G_delim in *"$2$_G_delim"*) ;; *) func_append "$@" ;; esac } # func_arith TERM... # ------------------ # Set func_arith_result to the result of evaluating TERMs. test -z "$_G_HAVE_ARITH_OP" \ && (eval 'test 2 = $(( 1 + 1 ))') 2>/dev/null \ && _G_HAVE_ARITH_OP=yes if test yes = "$_G_HAVE_ARITH_OP"; then eval 'func_arith () { $debug_cmd func_arith_result=$(( $* )) }' else func_arith () { $debug_cmd func_arith_result=`expr "$@"` } fi # func_basename FILE # ------------------ # Set func_basename_result to FILE with everything up to and including # the last / stripped. if test yes = "$_G_HAVE_XSI_OPS"; then # If this shell supports suffix pattern removal, then use it to avoid # forking. Hide the definitions single quotes in case the shell chokes # on unsupported syntax... _b='func_basename_result=${1##*/}' _d='case $1 in */*) func_dirname_result=${1%/*}$2 ;; * ) func_dirname_result=$3 ;; esac' else # ...otherwise fall back to using sed. _b='func_basename_result=`$ECHO "$1" |$SED "$sed_basename"`' _d='func_dirname_result=`$ECHO "$1" |$SED "$sed_dirname"` if test "X$func_dirname_result" = "X$1"; then func_dirname_result=$3 else func_append func_dirname_result "$2" fi' fi eval 'func_basename () { $debug_cmd '"$_b"' }' # func_dirname FILE APPEND NONDIR_REPLACEMENT # ------------------------------------------- # Compute the dirname of FILE. If nonempty, add APPEND to the result, # otherwise set result to NONDIR_REPLACEMENT. eval 'func_dirname () { $debug_cmd '"$_d"' }' # func_dirname_and_basename FILE APPEND NONDIR_REPLACEMENT # -------------------------------------------------------- # Perform func_basename and func_dirname in a single function # call: # dirname: Compute the dirname of FILE. If nonempty, # add APPEND to the result, otherwise set result # to NONDIR_REPLACEMENT. # value returned in "$func_dirname_result" # basename: Compute filename of FILE. # value retuned in "$func_basename_result" # For efficiency, we do not delegate to the functions above but instead # duplicate the functionality here. eval 'func_dirname_and_basename () { $debug_cmd '"$_b"' '"$_d"' }' # func_echo ARG... # ---------------- # Echo program name prefixed message. func_echo () { $debug_cmd _G_message=$* func_echo_IFS=$IFS IFS=$nl for _G_line in $_G_message; do IFS=$func_echo_IFS $ECHO "$progname: $_G_line" done IFS=$func_echo_IFS } # func_echo_all ARG... # -------------------- # Invoke $ECHO with all args, space-separated. func_echo_all () { $ECHO "$*" } # func_echo_infix_1 INFIX ARG... # ------------------------------ # Echo program name, followed by INFIX on the first line, with any # additional lines not showing INFIX. func_echo_infix_1 () { $debug_cmd $require_term_colors _G_infix=$1; shift _G_indent=$_G_infix _G_prefix="$progname: $_G_infix: " _G_message=$* # Strip color escape sequences before counting printable length for _G_tc in "$tc_reset" "$tc_bold" "$tc_standout" "$tc_red" "$tc_green" "$tc_blue" "$tc_cyan" do test -n "$_G_tc" && { _G_esc_tc=`$ECHO "$_G_tc" | $SED "$sed_make_literal_regex"` _G_indent=`$ECHO "$_G_indent" | $SED "s|$_G_esc_tc||g"` } done _G_indent="$progname: "`echo "$_G_indent" | $SED 's|.| |g'`" " ## exclude from sc_prohibit_nested_quotes func_echo_infix_1_IFS=$IFS IFS=$nl for _G_line in $_G_message; do IFS=$func_echo_infix_1_IFS $ECHO "$_G_prefix$tc_bold$_G_line$tc_reset" >&2 _G_prefix=$_G_indent done IFS=$func_echo_infix_1_IFS } # func_error ARG... # ----------------- # Echo program name prefixed message to standard error. func_error () { $debug_cmd $require_term_colors func_echo_infix_1 " $tc_standout${tc_red}error$tc_reset" "$*" >&2 } # func_fatal_error ARG... # ----------------------- # Echo program name prefixed message to standard error, and exit. func_fatal_error () { $debug_cmd func_error "$*" exit $EXIT_FAILURE } # func_grep EXPRESSION FILENAME # ----------------------------- # Check whether EXPRESSION matches any line of FILENAME, without output. func_grep () { $debug_cmd $GREP "$1" "$2" >/dev/null 2>&1 } # func_len STRING # --------------- # Set func_len_result to the length of STRING. STRING may not # start with a hyphen. test -z "$_G_HAVE_XSI_OPS" \ && (eval 'x=a/b/c; test 5aa/bb/cc = "${#x}${x%%/*}${x%/*}${x#*/}${x##*/}"') 2>/dev/null \ && _G_HAVE_XSI_OPS=yes if test yes = "$_G_HAVE_XSI_OPS"; then eval 'func_len () { $debug_cmd func_len_result=${#1} }' else func_len () { $debug_cmd func_len_result=`expr "$1" : ".*" 2>/dev/null || echo $max_cmd_len` } fi # func_mkdir_p DIRECTORY-PATH # --------------------------- # Make sure the entire path to DIRECTORY-PATH is available. func_mkdir_p () { $debug_cmd _G_directory_path=$1 _G_dir_list= if test -n "$_G_directory_path" && test : != "$opt_dry_run"; then # Protect directory names starting with '-' case $_G_directory_path in -*) _G_directory_path=./$_G_directory_path ;; esac # While some portion of DIR does not yet exist... while test ! -d "$_G_directory_path"; do # ...make a list in topmost first order. Use a colon delimited # list incase some portion of path contains whitespace. _G_dir_list=$_G_directory_path:$_G_dir_list # If the last portion added has no slash in it, the list is done case $_G_directory_path in */*) ;; *) break ;; esac # ...otherwise throw away the child directory and loop _G_directory_path=`$ECHO "$_G_directory_path" | $SED -e "$sed_dirname"` done _G_dir_list=`$ECHO "$_G_dir_list" | $SED 's|:*$||'` func_mkdir_p_IFS=$IFS; IFS=: for _G_dir in $_G_dir_list; do IFS=$func_mkdir_p_IFS # mkdir can fail with a 'File exist' error if two processes # try to create one of the directories concurrently. Don't # stop in that case! $MKDIR "$_G_dir" 2>/dev/null || : done IFS=$func_mkdir_p_IFS # Bail out if we (or some other process) failed to create a directory. test -d "$_G_directory_path" || \ func_fatal_error "Failed to create '$1'" fi } # func_mktempdir [BASENAME] # ------------------------- # Make a temporary directory that won't clash with other running # libtool processes, and avoids race conditions if possible. If # given, BASENAME is the basename for that directory. func_mktempdir () { $debug_cmd _G_template=${TMPDIR-/tmp}/${1-$progname} if test : = "$opt_dry_run"; then # Return a directory name, but don't create it in dry-run mode _G_tmpdir=$_G_template-$$ else # If mktemp works, use that first and foremost _G_tmpdir=`mktemp -d "$_G_template-XXXXXXXX" 2>/dev/null` if test ! -d "$_G_tmpdir"; then # Failing that, at least try and use $RANDOM to avoid a race _G_tmpdir=$_G_template-${RANDOM-0}$$ func_mktempdir_umask=`umask` umask 0077 $MKDIR "$_G_tmpdir" umask $func_mktempdir_umask fi # If we're not in dry-run mode, bomb out on failure test -d "$_G_tmpdir" || \ func_fatal_error "cannot create temporary directory '$_G_tmpdir'" fi $ECHO "$_G_tmpdir" } # func_normal_abspath PATH # ------------------------ # Remove doubled-up and trailing slashes, "." path components, # and cancel out any ".." path components in PATH after making # it an absolute path. func_normal_abspath () { $debug_cmd # These SED scripts presuppose an absolute path with a trailing slash. _G_pathcar='s|^/\([^/]*\).*$|\1|' _G_pathcdr='s|^/[^/]*||' _G_removedotparts=':dotsl s|/\./|/|g t dotsl s|/\.$|/|' _G_collapseslashes='s|/\{1,\}|/|g' _G_finalslash='s|/*$|/|' # Start from root dir and reassemble the path. func_normal_abspath_result= func_normal_abspath_tpath=$1 func_normal_abspath_altnamespace= case $func_normal_abspath_tpath in "") # Empty path, that just means $cwd. func_stripname '' '/' "`pwd`" func_normal_abspath_result=$func_stripname_result return ;; # The next three entries are used to spot a run of precisely # two leading slashes without using negated character classes; # we take advantage of case's first-match behaviour. ///*) # Unusual form of absolute path, do nothing. ;; //*) # Not necessarily an ordinary path; POSIX reserves leading '//' # and for example Cygwin uses it to access remote file shares # over CIFS/SMB, so we conserve a leading double slash if found. func_normal_abspath_altnamespace=/ ;; /*) # Absolute path, do nothing. ;; *) # Relative path, prepend $cwd. func_normal_abspath_tpath=`pwd`/$func_normal_abspath_tpath ;; esac # Cancel out all the simple stuff to save iterations. We also want # the path to end with a slash for ease of parsing, so make sure # there is one (and only one) here. func_normal_abspath_tpath=`$ECHO "$func_normal_abspath_tpath" | $SED \ -e "$_G_removedotparts" -e "$_G_collapseslashes" -e "$_G_finalslash"` while :; do # Processed it all yet? if test / = "$func_normal_abspath_tpath"; then # If we ascended to the root using ".." the result may be empty now. if test -z "$func_normal_abspath_result"; then func_normal_abspath_result=/ fi break fi func_normal_abspath_tcomponent=`$ECHO "$func_normal_abspath_tpath" | $SED \ -e "$_G_pathcar"` func_normal_abspath_tpath=`$ECHO "$func_normal_abspath_tpath" | $SED \ -e "$_G_pathcdr"` # Figure out what to do with it case $func_normal_abspath_tcomponent in "") # Trailing empty path component, ignore it. ;; ..) # Parent dir; strip last assembled component from result. func_dirname "$func_normal_abspath_result" func_normal_abspath_result=$func_dirname_result ;; *) # Actual path component, append it. func_append func_normal_abspath_result "/$func_normal_abspath_tcomponent" ;; esac done # Restore leading double-slash if one was found on entry. func_normal_abspath_result=$func_normal_abspath_altnamespace$func_normal_abspath_result } # func_notquiet ARG... # -------------------- # Echo program name prefixed message only when not in quiet mode. func_notquiet () { $debug_cmd $opt_quiet || func_echo ${1+"$@"} # A bug in bash halts the script if the last line of a function # fails when set -e is in force, so we need another command to # work around that: : } # func_relative_path SRCDIR DSTDIR # -------------------------------- # Set func_relative_path_result to the relative path from SRCDIR to DSTDIR. func_relative_path () { $debug_cmd func_relative_path_result= func_normal_abspath "$1" func_relative_path_tlibdir=$func_normal_abspath_result func_normal_abspath "$2" func_relative_path_tbindir=$func_normal_abspath_result # Ascend the tree starting from libdir while :; do # check if we have found a prefix of bindir case $func_relative_path_tbindir in $func_relative_path_tlibdir) # found an exact match func_relative_path_tcancelled= break ;; $func_relative_path_tlibdir*) # found a matching prefix func_stripname "$func_relative_path_tlibdir" '' "$func_relative_path_tbindir" func_relative_path_tcancelled=$func_stripname_result if test -z "$func_relative_path_result"; then func_relative_path_result=. fi break ;; *) func_dirname $func_relative_path_tlibdir func_relative_path_tlibdir=$func_dirname_result if test -z "$func_relative_path_tlibdir"; then # Have to descend all the way to the root! func_relative_path_result=../$func_relative_path_result func_relative_path_tcancelled=$func_relative_path_tbindir break fi func_relative_path_result=../$func_relative_path_result ;; esac done # Now calculate path; take care to avoid doubling-up slashes. func_stripname '' '/' "$func_relative_path_result" func_relative_path_result=$func_stripname_result func_stripname '/' '/' "$func_relative_path_tcancelled" if test -n "$func_stripname_result"; then func_append func_relative_path_result "/$func_stripname_result" fi # Normalisation. If bindir is libdir, return '.' else relative path. if test -n "$func_relative_path_result"; then func_stripname './' '' "$func_relative_path_result" func_relative_path_result=$func_stripname_result fi test -n "$func_relative_path_result" || func_relative_path_result=. : } # func_quote_for_eval ARG... # -------------------------- # Aesthetically quote ARGs to be evaled later. # This function returns two values: # i) func_quote_for_eval_result # double-quoted, suitable for a subsequent eval # ii) func_quote_for_eval_unquoted_result # has all characters that are still active within double # quotes backslashified. func_quote_for_eval () { $debug_cmd func_quote_for_eval_unquoted_result= func_quote_for_eval_result= while test 0 -lt $#; do case $1 in *[\\\`\"\$]*) _G_unquoted_arg=`printf '%s\n' "$1" |$SED "$sed_quote_subst"` ;; *) _G_unquoted_arg=$1 ;; esac if test -n "$func_quote_for_eval_unquoted_result"; then func_append func_quote_for_eval_unquoted_result " $_G_unquoted_arg" else func_append func_quote_for_eval_unquoted_result "$_G_unquoted_arg" fi case $_G_unquoted_arg in # Double-quote args containing shell metacharacters to delay # word splitting, command substitution and variable expansion # for a subsequent eval. # Many Bourne shells cannot handle close brackets correctly # in scan sets, so we specify it separately. *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \ ]*|*]*|"") _G_quoted_arg=\"$_G_unquoted_arg\" ;; *) _G_quoted_arg=$_G_unquoted_arg ;; esac if test -n "$func_quote_for_eval_result"; then func_append func_quote_for_eval_result " $_G_quoted_arg" else func_append func_quote_for_eval_result "$_G_quoted_arg" fi shift done } # func_quote_for_expand ARG # ------------------------- # Aesthetically quote ARG to be evaled later; same as above, # but do not quote variable references. func_quote_for_expand () { $debug_cmd case $1 in *[\\\`\"]*) _G_arg=`$ECHO "$1" | $SED \ -e "$sed_double_quote_subst" -e "$sed_double_backslash"` ;; *) _G_arg=$1 ;; esac case $_G_arg in # Double-quote args containing shell metacharacters to delay # word splitting and command substitution for a subsequent eval. # Many Bourne shells cannot handle close brackets correctly # in scan sets, so we specify it separately. *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \ ]*|*]*|"") _G_arg=\"$_G_arg\" ;; esac func_quote_for_expand_result=$_G_arg } # func_stripname PREFIX SUFFIX NAME # --------------------------------- # strip PREFIX and SUFFIX from NAME, and store in func_stripname_result. # PREFIX and SUFFIX must not contain globbing or regex special # characters, hashes, percent signs, but SUFFIX may contain a leading # dot (in which case that matches only a dot). if test yes = "$_G_HAVE_XSI_OPS"; then eval 'func_stripname () { $debug_cmd # pdksh 5.2.14 does not do ${X%$Y} correctly if both X and Y are # positional parameters, so assign one to ordinary variable first. func_stripname_result=$3 func_stripname_result=${func_stripname_result#"$1"} func_stripname_result=${func_stripname_result%"$2"} }' else func_stripname () { $debug_cmd case $2 in .*) func_stripname_result=`$ECHO "$3" | $SED -e "s%^$1%%" -e "s%\\\\$2\$%%"`;; *) func_stripname_result=`$ECHO "$3" | $SED -e "s%^$1%%" -e "s%$2\$%%"`;; esac } fi # func_show_eval CMD [FAIL_EXP] # ----------------------------- # Unless opt_quiet is true, then output CMD. Then, if opt_dryrun is # not true, evaluate CMD. If the evaluation of CMD fails, and FAIL_EXP # is given, then evaluate it. func_show_eval () { $debug_cmd _G_cmd=$1 _G_fail_exp=${2-':'} func_quote_for_expand "$_G_cmd" eval "func_notquiet $func_quote_for_expand_result" $opt_dry_run || { eval "$_G_cmd" _G_status=$? if test 0 -ne "$_G_status"; then eval "(exit $_G_status); $_G_fail_exp" fi } } # func_show_eval_locale CMD [FAIL_EXP] # ------------------------------------ # Unless opt_quiet is true, then output CMD. Then, if opt_dryrun is # not true, evaluate CMD. If the evaluation of CMD fails, and FAIL_EXP # is given, then evaluate it. Use the saved locale for evaluation. func_show_eval_locale () { $debug_cmd _G_cmd=$1 _G_fail_exp=${2-':'} $opt_quiet || { func_quote_for_expand "$_G_cmd" eval "func_echo $func_quote_for_expand_result" } $opt_dry_run || { eval "$_G_user_locale $_G_cmd" _G_status=$? eval "$_G_safe_locale" if test 0 -ne "$_G_status"; then eval "(exit $_G_status); $_G_fail_exp" fi } } # func_tr_sh # ---------- # Turn $1 into a string suitable for a shell variable name. # Result is stored in $func_tr_sh_result. All characters # not in the set a-zA-Z0-9_ are replaced with '_'. Further, # if $1 begins with a digit, a '_' is prepended as well. func_tr_sh () { $debug_cmd case $1 in [0-9]* | *[!a-zA-Z0-9_]*) func_tr_sh_result=`$ECHO "$1" | $SED -e 's/^\([0-9]\)/_\1/' -e 's/[^a-zA-Z0-9_]/_/g'` ;; * ) func_tr_sh_result=$1 ;; esac } # func_verbose ARG... # ------------------- # Echo program name prefixed message in verbose mode only. func_verbose () { $debug_cmd $opt_verbose && func_echo "$*" : } # func_warn_and_continue ARG... # ----------------------------- # Echo program name prefixed warning message to standard error. func_warn_and_continue () { $debug_cmd $require_term_colors func_echo_infix_1 "${tc_red}warning$tc_reset" "$*" >&2 } # func_warning CATEGORY ARG... # ---------------------------- # Echo program name prefixed warning message to standard error. Warning # messages can be filtered according to CATEGORY, where this function # elides messages where CATEGORY is not listed in the global variable # 'opt_warning_types'. func_warning () { $debug_cmd # CATEGORY must be in the warning_categories list! case " $warning_categories " in *" $1 "*) ;; *) func_internal_error "invalid warning category '$1'" ;; esac _G_category=$1 shift case " $opt_warning_types " in *" $_G_category "*) $warning_func ${1+"$@"} ;; esac } # func_sort_ver VER1 VER2 # ----------------------- # 'sort -V' is not generally available. # Note this deviates from the version comparison in automake # in that it treats 1.5 < 1.5.0, and treats 1.4.4a < 1.4-p3a # but this should suffice as we won't be specifying old # version formats or redundant trailing .0 in bootstrap.conf. # If we did want full compatibility then we should probably # use m4_version_compare from autoconf. func_sort_ver () { $debug_cmd printf '%s\n%s\n' "$1" "$2" \ | sort -t. -k 1,1n -k 2,2n -k 3,3n -k 4,4n -k 5,5n -k 6,6n -k 7,7n -k 8,8n -k 9,9n } # func_lt_ver PREV CURR # --------------------- # Return true if PREV and CURR are in the correct order according to # func_sort_ver, otherwise false. Use it like this: # # func_lt_ver "$prev_ver" "$proposed_ver" || func_fatal_error "..." func_lt_ver () { $debug_cmd test "x$1" = x`func_sort_ver "$1" "$2" | $SED 1q` } # Local variables: # mode: shell-script # sh-indentation: 2 # eval: (add-hook 'before-save-hook 'time-stamp) # time-stamp-pattern: "10/scriptversion=%:y-%02m-%02d.%02H; # UTC" # time-stamp-time-zone: "UTC" # End: #! /bin/sh # Set a version string for this script. scriptversion=2015-10-07.11; # UTC # A portable, pluggable option parser for Bourne shell. # Written by Gary V. Vaughan, 2010 # Copyright (C) 2010-2015 Free Software Foundation, Inc. # This is free software; see the source for copying conditions. There is NO # warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program. If not, see . # Please report bugs or propose patches to gary@gnu.org. ## ------ ## ## Usage. ## ## ------ ## # This file is a library for parsing options in your shell scripts along # with assorted other useful supporting features that you can make use # of too. # # For the simplest scripts you might need only: # # #!/bin/sh # . relative/path/to/funclib.sh # . relative/path/to/options-parser # scriptversion=1.0 # func_options ${1+"$@"} # eval set dummy "$func_options_result"; shift # ...rest of your script... # # In order for the '--version' option to work, you will need to have a # suitably formatted comment like the one at the top of this file # starting with '# Written by ' and ending with '# warranty; '. # # For '-h' and '--help' to work, you will also need a one line # description of your script's purpose in a comment directly above the # '# Written by ' line, like the one at the top of this file. # # The default options also support '--debug', which will turn on shell # execution tracing (see the comment above debug_cmd below for another # use), and '--verbose' and the func_verbose function to allow your script # to display verbose messages only when your user has specified # '--verbose'. # # After sourcing this file, you can plug processing for additional # options by amending the variables from the 'Configuration' section # below, and following the instructions in the 'Option parsing' # section further down. ## -------------- ## ## Configuration. ## ## -------------- ## # You should override these variables in your script after sourcing this # file so that they reflect the customisations you have added to the # option parser. # The usage line for option parsing errors and the start of '-h' and # '--help' output messages. You can embed shell variables for delayed # expansion at the time the message is displayed, but you will need to # quote other shell meta-characters carefully to prevent them being # expanded when the contents are evaled. usage='$progpath [OPTION]...' # Short help message in response to '-h' and '--help'. Add to this or # override it after sourcing this library to reflect the full set of # options your script accepts. usage_message="\ --debug enable verbose shell tracing -W, --warnings=CATEGORY report the warnings falling in CATEGORY [all] -v, --verbose verbosely report processing --version print version information and exit -h, --help print short or long help message and exit " # Additional text appended to 'usage_message' in response to '--help'. long_help_message=" Warning categories include: 'all' show all warnings 'none' turn off all the warnings 'error' warnings are treated as fatal errors" # Help message printed before fatal option parsing errors. fatal_help="Try '\$progname --help' for more information." ## ------------------------- ## ## Hook function management. ## ## ------------------------- ## # This section contains functions for adding, removing, and running hooks # to the main code. A hook is just a named list of of function, that can # be run in order later on. # func_hookable FUNC_NAME # ----------------------- # Declare that FUNC_NAME will run hooks added with # 'func_add_hook FUNC_NAME ...'. func_hookable () { $debug_cmd func_append hookable_fns " $1" } # func_add_hook FUNC_NAME HOOK_FUNC # --------------------------------- # Request that FUNC_NAME call HOOK_FUNC before it returns. FUNC_NAME must # first have been declared "hookable" by a call to 'func_hookable'. func_add_hook () { $debug_cmd case " $hookable_fns " in *" $1 "*) ;; *) func_fatal_error "'$1' does not accept hook functions." ;; esac eval func_append ${1}_hooks '" $2"' } # func_remove_hook FUNC_NAME HOOK_FUNC # ------------------------------------ # Remove HOOK_FUNC from the list of functions called by FUNC_NAME. func_remove_hook () { $debug_cmd eval ${1}_hooks='`$ECHO "\$'$1'_hooks" |$SED "s| '$2'||"`' } # func_run_hooks FUNC_NAME [ARG]... # --------------------------------- # Run all hook functions registered to FUNC_NAME. # It is assumed that the list of hook functions contains nothing more # than a whitespace-delimited list of legal shell function names, and # no effort is wasted trying to catch shell meta-characters or preserve # whitespace. func_run_hooks () { $debug_cmd _G_rc_run_hooks=false case " $hookable_fns " in *" $1 "*) ;; *) func_fatal_error "'$1' does not support hook funcions.n" ;; esac eval _G_hook_fns=\$$1_hooks; shift for _G_hook in $_G_hook_fns; do if eval $_G_hook '"$@"'; then # store returned options list back into positional # parameters for next 'cmd' execution. eval _G_hook_result=\$${_G_hook}_result eval set dummy "$_G_hook_result"; shift _G_rc_run_hooks=: fi done $_G_rc_run_hooks && func_run_hooks_result=$_G_hook_result } ## --------------- ## ## Option parsing. ## ## --------------- ## # In order to add your own option parsing hooks, you must accept the # full positional parameter list in your hook function, you may remove/edit # any options that you action, and then pass back the remaining unprocessed # options in '_result', escaped suitably for # 'eval'. In this case you also must return $EXIT_SUCCESS to let the # hook's caller know that it should pay attention to # '_result'. Returning $EXIT_FAILURE signalizes that # arguments are left untouched by the hook and therefore caller will ignore the # result variable. # # Like this: # # my_options_prep () # { # $debug_cmd # # # Extend the existing usage message. # usage_message=$usage_message' # -s, --silent don'\''t print informational messages # ' # # No change in '$@' (ignored completely by this hook). There is # # no need to do the equivalent (but slower) action: # # func_quote_for_eval ${1+"$@"} # # my_options_prep_result=$func_quote_for_eval_result # false # } # func_add_hook func_options_prep my_options_prep # # # my_silent_option () # { # $debug_cmd # # args_changed=false # # # Note that for efficiency, we parse as many options as we can # # recognise in a loop before passing the remainder back to the # # caller on the first unrecognised argument we encounter. # while test $# -gt 0; do # opt=$1; shift # case $opt in # --silent|-s) opt_silent=: # args_changed=: # ;; # # Separate non-argument short options: # -s*) func_split_short_opt "$_G_opt" # set dummy "$func_split_short_opt_name" \ # "-$func_split_short_opt_arg" ${1+"$@"} # shift # args_changed=: # ;; # *) # Make sure the first unrecognised option "$_G_opt" # # is added back to "$@", we could need that later # # if $args_changed is true. # set dummy "$_G_opt" ${1+"$@"}; shift; break ;; # esac # done # # if $args_changed; then # func_quote_for_eval ${1+"$@"} # my_silent_option_result=$func_quote_for_eval_result # fi # # $args_changed # } # func_add_hook func_parse_options my_silent_option # # # my_option_validation () # { # $debug_cmd # # $opt_silent && $opt_verbose && func_fatal_help "\ # '--silent' and '--verbose' options are mutually exclusive." # # false # } # func_add_hook func_validate_options my_option_validation # # You'll also need to manually amend $usage_message to reflect the extra # options you parse. It's preferable to append if you can, so that # multiple option parsing hooks can be added safely. # func_options_finish [ARG]... # ---------------------------- # Finishing the option parse loop (call 'func_options' hooks ATM). func_options_finish () { $debug_cmd _G_func_options_finish_exit=false if func_run_hooks func_options ${1+"$@"}; then func_options_finish_result=$func_run_hooks_result _G_func_options_finish_exit=: fi $_G_func_options_finish_exit } # func_options [ARG]... # --------------------- # All the functions called inside func_options are hookable. See the # individual implementations for details. func_hookable func_options func_options () { $debug_cmd _G_rc_options=false for my_func in options_prep parse_options validate_options options_finish do if eval func_$my_func '${1+"$@"}'; then eval _G_res_var='$'"func_${my_func}_result" eval set dummy "$_G_res_var" ; shift _G_rc_options=: fi done # Save modified positional parameters for caller. As a top-level # options-parser function we always need to set the 'func_options_result' # variable (regardless the $_G_rc_options value). if $_G_rc_options; then func_options_result=$_G_res_var else func_quote_for_eval ${1+"$@"} func_options_result=$func_quote_for_eval_result fi $_G_rc_options } # func_options_prep [ARG]... # -------------------------- # All initialisations required before starting the option parse loop. # Note that when calling hook functions, we pass through the list of # positional parameters. If a hook function modifies that list, and # needs to propagate that back to rest of this script, then the complete # modified list must be put in 'func_run_hooks_result' before # returning $EXIT_SUCCESS (otherwise $EXIT_FAILURE is returned). func_hookable func_options_prep func_options_prep () { $debug_cmd # Option defaults: opt_verbose=false opt_warning_types= _G_rc_options_prep=false if func_run_hooks func_options_prep ${1+"$@"}; then _G_rc_options_prep=: # save modified positional parameters for caller func_options_prep_result=$func_run_hooks_result fi $_G_rc_options_prep } # func_parse_options [ARG]... # --------------------------- # The main option parsing loop. func_hookable func_parse_options func_parse_options () { $debug_cmd func_parse_options_result= _G_rc_parse_options=false # this just eases exit handling while test $# -gt 0; do # Defer to hook functions for initial option parsing, so they # get priority in the event of reusing an option name. if func_run_hooks func_parse_options ${1+"$@"}; then eval set dummy "$func_run_hooks_result"; shift _G_rc_parse_options=: fi # Break out of the loop if we already parsed every option. test $# -gt 0 || break _G_match_parse_options=: _G_opt=$1 shift case $_G_opt in --debug|-x) debug_cmd='set -x' func_echo "enabling shell trace mode" $debug_cmd ;; --no-warnings|--no-warning|--no-warn) set dummy --warnings none ${1+"$@"} shift ;; --warnings|--warning|-W) if test $# = 0 && func_missing_arg $_G_opt; then _G_rc_parse_options=: break fi case " $warning_categories $1" in *" $1 "*) # trailing space prevents matching last $1 above func_append_uniq opt_warning_types " $1" ;; *all) opt_warning_types=$warning_categories ;; *none) opt_warning_types=none warning_func=: ;; *error) opt_warning_types=$warning_categories warning_func=func_fatal_error ;; *) func_fatal_error \ "unsupported warning category: '$1'" ;; esac shift ;; --verbose|-v) opt_verbose=: ;; --version) func_version ;; -\?|-h) func_usage ;; --help) func_help ;; # Separate optargs to long options (plugins may need this): --*=*) func_split_equals "$_G_opt" set dummy "$func_split_equals_lhs" \ "$func_split_equals_rhs" ${1+"$@"} shift ;; # Separate optargs to short options: -W*) func_split_short_opt "$_G_opt" set dummy "$func_split_short_opt_name" \ "$func_split_short_opt_arg" ${1+"$@"} shift ;; # Separate non-argument short options: -\?*|-h*|-v*|-x*) func_split_short_opt "$_G_opt" set dummy "$func_split_short_opt_name" \ "-$func_split_short_opt_arg" ${1+"$@"} shift ;; --) _G_rc_parse_options=: ; break ;; -*) func_fatal_help "unrecognised option: '$_G_opt'" ;; *) set dummy "$_G_opt" ${1+"$@"}; shift _G_match_parse_options=false break ;; esac $_G_match_parse_options && _G_rc_parse_options=: done if $_G_rc_parse_options; then # save modified positional parameters for caller func_quote_for_eval ${1+"$@"} func_parse_options_result=$func_quote_for_eval_result fi $_G_rc_parse_options } # func_validate_options [ARG]... # ------------------------------ # Perform any sanity checks on option settings and/or unconsumed # arguments. func_hookable func_validate_options func_validate_options () { $debug_cmd _G_rc_validate_options=false # Display all warnings if -W was not given. test -n "$opt_warning_types" || opt_warning_types=" $warning_categories" if func_run_hooks func_validate_options ${1+"$@"}; then # save modified positional parameters for caller func_validate_options_result=$func_run_hooks_result _G_rc_validate_options=: fi # Bail if the options were screwed! $exit_cmd $EXIT_FAILURE $_G_rc_validate_options } ## ----------------- ## ## Helper functions. ## ## ----------------- ## # This section contains the helper functions used by the rest of the # hookable option parser framework in ascii-betical order. # func_fatal_help ARG... # ---------------------- # Echo program name prefixed message to standard error, followed by # a help hint, and exit. func_fatal_help () { $debug_cmd eval \$ECHO \""Usage: $usage"\" eval \$ECHO \""$fatal_help"\" func_error ${1+"$@"} exit $EXIT_FAILURE } # func_help # --------- # Echo long help message to standard output and exit. func_help () { $debug_cmd func_usage_message $ECHO "$long_help_message" exit 0 } # func_missing_arg ARGNAME # ------------------------ # Echo program name prefixed message to standard error and set global # exit_cmd. func_missing_arg () { $debug_cmd func_error "Missing argument for '$1'." exit_cmd=exit } # func_split_equals STRING # ------------------------ # Set func_split_equals_lhs and func_split_equals_rhs shell variables after # splitting STRING at the '=' sign. test -z "$_G_HAVE_XSI_OPS" \ && (eval 'x=a/b/c; test 5aa/bb/cc = "${#x}${x%%/*}${x%/*}${x#*/}${x##*/}"') 2>/dev/null \ && _G_HAVE_XSI_OPS=yes if test yes = "$_G_HAVE_XSI_OPS" then # This is an XSI compatible shell, allowing a faster implementation... eval 'func_split_equals () { $debug_cmd func_split_equals_lhs=${1%%=*} func_split_equals_rhs=${1#*=} test "x$func_split_equals_lhs" = "x$1" \ && func_split_equals_rhs= }' else # ...otherwise fall back to using expr, which is often a shell builtin. func_split_equals () { $debug_cmd func_split_equals_lhs=`expr "x$1" : 'x\([^=]*\)'` func_split_equals_rhs= test "x$func_split_equals_lhs" = "x$1" \ || func_split_equals_rhs=`expr "x$1" : 'x[^=]*=\(.*\)$'` } fi #func_split_equals # func_split_short_opt SHORTOPT # ----------------------------- # Set func_split_short_opt_name and func_split_short_opt_arg shell # variables after splitting SHORTOPT after the 2nd character. if test yes = "$_G_HAVE_XSI_OPS" then # This is an XSI compatible shell, allowing a faster implementation... eval 'func_split_short_opt () { $debug_cmd func_split_short_opt_arg=${1#??} func_split_short_opt_name=${1%"$func_split_short_opt_arg"} }' else # ...otherwise fall back to using expr, which is often a shell builtin. func_split_short_opt () { $debug_cmd func_split_short_opt_name=`expr "x$1" : 'x-\(.\)'` func_split_short_opt_arg=`expr "x$1" : 'x-.\(.*\)$'` } fi #func_split_short_opt # func_usage # ---------- # Echo short help message to standard output and exit. func_usage () { $debug_cmd func_usage_message $ECHO "Run '$progname --help |${PAGER-more}' for full usage" exit 0 } # func_usage_message # ------------------ # Echo short help message to standard output. func_usage_message () { $debug_cmd eval \$ECHO \""Usage: $usage"\" echo $SED -n 's|^# || /^Written by/{ x;p;x } h /^Written by/q' < "$progpath" echo eval \$ECHO \""$usage_message"\" } # func_version # ------------ # Echo version message to standard output and exit. func_version () { $debug_cmd printf '%s\n' "$progname $scriptversion" $SED -n ' /(C)/!b go :more /\./!{ N s|\n# | | b more } :go /^# Written by /,/# warranty; / { s|^# || s|^# *$|| s|\((C)\)[ 0-9,-]*[ ,-]\([1-9][0-9]* \)|\1 \2| p } /^# Written by / { s|^# || p } /^warranty; /q' < "$progpath" exit $? } # Local variables: # mode: shell-script # sh-indentation: 2 # eval: (add-hook 'before-save-hook 'time-stamp) # time-stamp-pattern: "10/scriptversion=%:y-%02m-%02d.%02H; # UTC" # time-stamp-time-zone: "UTC" # End: # Set a version string. scriptversion='(GNU libtool) 2.4.6' # func_echo ARG... # ---------------- # Libtool also displays the current mode in messages, so override # funclib.sh func_echo with this custom definition. func_echo () { $debug_cmd _G_message=$* func_echo_IFS=$IFS IFS=$nl for _G_line in $_G_message; do IFS=$func_echo_IFS $ECHO "$progname${opt_mode+: $opt_mode}: $_G_line" done IFS=$func_echo_IFS } # func_warning ARG... # ------------------- # Libtool warnings are not categorized, so override funclib.sh # func_warning with this simpler definition. func_warning () { $debug_cmd $warning_func ${1+"$@"} } ## ---------------- ## ## Options parsing. ## ## ---------------- ## # Hook in the functions to make sure our own options are parsed during # the option parsing loop. usage='$progpath [OPTION]... [MODE-ARG]...' # Short help message in response to '-h'. usage_message="Options: --config show all configuration variables --debug enable verbose shell tracing -n, --dry-run display commands without modifying any files --features display basic configuration information and exit --mode=MODE use operation mode MODE --no-warnings equivalent to '-Wnone' --preserve-dup-deps don't remove duplicate dependency libraries --quiet, --silent don't print informational messages --tag=TAG use configuration variables from tag TAG -v, --verbose print more informational messages than default --version print version information -W, --warnings=CATEGORY report the warnings falling in CATEGORY [all] -h, --help, --help-all print short, long, or detailed help message " # Additional text appended to 'usage_message' in response to '--help'. func_help () { $debug_cmd func_usage_message $ECHO "$long_help_message MODE must be one of the following: clean remove files from the build directory compile compile a source file into a libtool object execute automatically set library path, then run a program finish complete the installation of libtool libraries install install libraries or executables link create a library or an executable uninstall remove libraries from an installed directory MODE-ARGS vary depending on the MODE. When passed as first option, '--mode=MODE' may be abbreviated as 'MODE' or a unique abbreviation of that. Try '$progname --help --mode=MODE' for a more detailed description of MODE. When reporting a bug, please describe a test case to reproduce it and include the following information: host-triplet: $host shell: $SHELL compiler: $LTCC compiler flags: $LTCFLAGS linker: $LD (gnu? $with_gnu_ld) version: $progname $scriptversion Debian-2.4.6-9 automake: `($AUTOMAKE --version) 2>/dev/null |$SED 1q` autoconf: `($AUTOCONF --version) 2>/dev/null |$SED 1q` Report bugs to . GNU libtool home page: . General help using GNU software: ." exit 0 } # func_lo2o OBJECT-NAME # --------------------- # Transform OBJECT-NAME from a '.lo' suffix to the platform specific # object suffix. lo2o=s/\\.lo\$/.$objext/ o2lo=s/\\.$objext\$/.lo/ if test yes = "$_G_HAVE_XSI_OPS"; then eval 'func_lo2o () { case $1 in *.lo) func_lo2o_result=${1%.lo}.$objext ;; * ) func_lo2o_result=$1 ;; esac }' # func_xform LIBOBJ-OR-SOURCE # --------------------------- # Transform LIBOBJ-OR-SOURCE from a '.o' or '.c' (or otherwise) # suffix to a '.lo' libtool-object suffix. eval 'func_xform () { func_xform_result=${1%.*}.lo }' else # ...otherwise fall back to using sed. func_lo2o () { func_lo2o_result=`$ECHO "$1" | $SED "$lo2o"` } func_xform () { func_xform_result=`$ECHO "$1" | $SED 's|\.[^.]*$|.lo|'` } fi # func_fatal_configuration ARG... # ------------------------------- # Echo program name prefixed message to standard error, followed by # a configuration failure hint, and exit. func_fatal_configuration () { func__fatal_error ${1+"$@"} \ "See the $PACKAGE documentation for more information." \ "Fatal configuration error." } # func_config # ----------- # Display the configuration for all the tags in this script. func_config () { re_begincf='^# ### BEGIN LIBTOOL' re_endcf='^# ### END LIBTOOL' # Default configuration. $SED "1,/$re_begincf CONFIG/d;/$re_endcf CONFIG/,\$d" < "$progpath" # Now print the configurations for the tags. for tagname in $taglist; do $SED -n "/$re_begincf TAG CONFIG: $tagname\$/,/$re_endcf TAG CONFIG: $tagname\$/p" < "$progpath" done exit $? } # func_features # ------------- # Display the features supported by this script. func_features () { echo "host: $host" if test yes = "$build_libtool_libs"; then echo "enable shared libraries" else echo "disable shared libraries" fi if test yes = "$build_old_libs"; then echo "enable static libraries" else echo "disable static libraries" fi exit $? } # func_enable_tag TAGNAME # ----------------------- # Verify that TAGNAME is valid, and either flag an error and exit, or # enable the TAGNAME tag. We also add TAGNAME to the global $taglist # variable here. func_enable_tag () { # Global variable: tagname=$1 re_begincf="^# ### BEGIN LIBTOOL TAG CONFIG: $tagname\$" re_endcf="^# ### END LIBTOOL TAG CONFIG: $tagname\$" sed_extractcf=/$re_begincf/,/$re_endcf/p # Validate tagname. case $tagname in *[!-_A-Za-z0-9,/]*) func_fatal_error "invalid tag name: $tagname" ;; esac # Don't test for the "default" C tag, as we know it's # there but not specially marked. case $tagname in CC) ;; *) if $GREP "$re_begincf" "$progpath" >/dev/null 2>&1; then taglist="$taglist $tagname" # Evaluate the configuration. Be careful to quote the path # and the sed script, to avoid splitting on whitespace, but # also don't use non-portable quotes within backquotes within # quotes we have to do it in 2 steps: extractedcf=`$SED -n -e "$sed_extractcf" < "$progpath"` eval "$extractedcf" else func_error "ignoring unknown tag $tagname" fi ;; esac } # func_check_version_match # ------------------------ # Ensure that we are using m4 macros, and libtool script from the same # release of libtool. func_check_version_match () { if test "$package_revision" != "$macro_revision"; then if test "$VERSION" != "$macro_version"; then if test -z "$macro_version"; then cat >&2 <<_LT_EOF $progname: Version mismatch error. This is $PACKAGE $VERSION, but the $progname: definition of this LT_INIT comes from an older release. $progname: You should recreate aclocal.m4 with macros from $PACKAGE $VERSION $progname: and run autoconf again. _LT_EOF else cat >&2 <<_LT_EOF $progname: Version mismatch error. This is $PACKAGE $VERSION, but the $progname: definition of this LT_INIT comes from $PACKAGE $macro_version. $progname: You should recreate aclocal.m4 with macros from $PACKAGE $VERSION $progname: and run autoconf again. _LT_EOF fi else cat >&2 <<_LT_EOF $progname: Version mismatch error. This is $PACKAGE $VERSION, revision $package_revision, $progname: but the definition of this LT_INIT comes from revision $macro_revision. $progname: You should recreate aclocal.m4 with macros from revision $package_revision $progname: of $PACKAGE $VERSION and run autoconf again. _LT_EOF fi exit $EXIT_MISMATCH fi } # libtool_options_prep [ARG]... # ----------------------------- # Preparation for options parsed by libtool. libtool_options_prep () { $debug_mode # Option defaults: opt_config=false opt_dlopen= opt_dry_run=false opt_help=false opt_mode= opt_preserve_dup_deps=false opt_quiet=false nonopt= preserve_args= _G_rc_lt_options_prep=: # Shorthand for --mode=foo, only valid as the first argument case $1 in clean|clea|cle|cl) shift; set dummy --mode clean ${1+"$@"}; shift ;; compile|compil|compi|comp|com|co|c) shift; set dummy --mode compile ${1+"$@"}; shift ;; execute|execut|execu|exec|exe|ex|e) shift; set dummy --mode execute ${1+"$@"}; shift ;; finish|finis|fini|fin|fi|f) shift; set dummy --mode finish ${1+"$@"}; shift ;; install|instal|insta|inst|ins|in|i) shift; set dummy --mode install ${1+"$@"}; shift ;; link|lin|li|l) shift; set dummy --mode link ${1+"$@"}; shift ;; uninstall|uninstal|uninsta|uninst|unins|unin|uni|un|u) shift; set dummy --mode uninstall ${1+"$@"}; shift ;; *) _G_rc_lt_options_prep=false ;; esac if $_G_rc_lt_options_prep; then # Pass back the list of options. func_quote_for_eval ${1+"$@"} libtool_options_prep_result=$func_quote_for_eval_result fi $_G_rc_lt_options_prep } func_add_hook func_options_prep libtool_options_prep # libtool_parse_options [ARG]... # --------------------------------- # Provide handling for libtool specific options. libtool_parse_options () { $debug_cmd _G_rc_lt_parse_options=false # Perform our own loop to consume as many options as possible in # each iteration. while test $# -gt 0; do _G_match_lt_parse_options=: _G_opt=$1 shift case $_G_opt in --dry-run|--dryrun|-n) opt_dry_run=: ;; --config) func_config ;; --dlopen|-dlopen) opt_dlopen="${opt_dlopen+$opt_dlopen }$1" shift ;; --preserve-dup-deps) opt_preserve_dup_deps=: ;; --features) func_features ;; --finish) set dummy --mode finish ${1+"$@"}; shift ;; --help) opt_help=: ;; --help-all) opt_help=': help-all' ;; --mode) test $# = 0 && func_missing_arg $_G_opt && break opt_mode=$1 case $1 in # Valid mode arguments: clean|compile|execute|finish|install|link|relink|uninstall) ;; # Catch anything else as an error *) func_error "invalid argument for $_G_opt" exit_cmd=exit break ;; esac shift ;; --no-silent|--no-quiet) opt_quiet=false func_append preserve_args " $_G_opt" ;; --no-warnings|--no-warning|--no-warn) opt_warning=false func_append preserve_args " $_G_opt" ;; --no-verbose) opt_verbose=false func_append preserve_args " $_G_opt" ;; --silent|--quiet) opt_quiet=: opt_verbose=false func_append preserve_args " $_G_opt" ;; --tag) test $# = 0 && func_missing_arg $_G_opt && break opt_tag=$1 func_append preserve_args " $_G_opt $1" func_enable_tag "$1" shift ;; --verbose|-v) opt_quiet=false opt_verbose=: func_append preserve_args " $_G_opt" ;; # An option not handled by this hook function: *) set dummy "$_G_opt" ${1+"$@"} ; shift _G_match_lt_parse_options=false break ;; esac $_G_match_lt_parse_options && _G_rc_lt_parse_options=: done if $_G_rc_lt_parse_options; then # save modified positional parameters for caller func_quote_for_eval ${1+"$@"} libtool_parse_options_result=$func_quote_for_eval_result fi $_G_rc_lt_parse_options } func_add_hook func_parse_options libtool_parse_options # libtool_validate_options [ARG]... # --------------------------------- # Perform any sanity checks on option settings and/or unconsumed # arguments. libtool_validate_options () { # save first non-option argument if test 0 -lt $#; then nonopt=$1 shift fi # preserve --debug test : = "$debug_cmd" || func_append preserve_args " --debug" case $host in # Solaris2 added to fix http://debbugs.gnu.org/cgi/bugreport.cgi?bug=16452 # see also: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59788 *cygwin* | *mingw* | *pw32* | *cegcc* | *solaris2* | *os2*) # don't eliminate duplications in $postdeps and $predeps opt_duplicate_compiler_generated_deps=: ;; *) opt_duplicate_compiler_generated_deps=$opt_preserve_dup_deps ;; esac $opt_help || { # Sanity checks first: func_check_version_match test yes != "$build_libtool_libs" \ && test yes != "$build_old_libs" \ && func_fatal_configuration "not configured to build any kind of library" # Darwin sucks eval std_shrext=\"$shrext_cmds\" # Only execute mode is allowed to have -dlopen flags. if test -n "$opt_dlopen" && test execute != "$opt_mode"; then func_error "unrecognized option '-dlopen'" $ECHO "$help" 1>&2 exit $EXIT_FAILURE fi # Change the help message to a mode-specific one. generic_help=$help help="Try '$progname --help --mode=$opt_mode' for more information." } # Pass back the unparsed argument list func_quote_for_eval ${1+"$@"} libtool_validate_options_result=$func_quote_for_eval_result } func_add_hook func_validate_options libtool_validate_options # Process options as early as possible so that --help and --version # can return quickly. func_options ${1+"$@"} eval set dummy "$func_options_result"; shift ## ----------- ## ## Main. ## ## ----------- ## magic='%%%MAGIC variable%%%' magic_exe='%%%MAGIC EXE variable%%%' # Global variables. extracted_archives= extracted_serial=0 # If this variable is set in any of the actions, the command in it # will be execed at the end. This prevents here-documents from being # left over by shells. exec_cmd= # A function that is used when there is no print builtin or printf. func_fallback_echo () { eval 'cat <<_LTECHO_EOF $1 _LTECHO_EOF' } # func_generated_by_libtool # True iff stdin has been generated by Libtool. This function is only # a basic sanity check; it will hardly flush out determined imposters. func_generated_by_libtool_p () { $GREP "^# Generated by .*$PACKAGE" > /dev/null 2>&1 } # func_lalib_p file # True iff FILE is a libtool '.la' library or '.lo' object file. # This function is only a basic sanity check; it will hardly flush out # determined imposters. func_lalib_p () { test -f "$1" && $SED -e 4q "$1" 2>/dev/null | func_generated_by_libtool_p } # func_lalib_unsafe_p file # True iff FILE is a libtool '.la' library or '.lo' object file. # This function implements the same check as func_lalib_p without # resorting to external programs. To this end, it redirects stdin and # closes it afterwards, without saving the original file descriptor. # As a safety measure, use it only where a negative result would be # fatal anyway. Works if 'file' does not exist. func_lalib_unsafe_p () { lalib_p=no if test -f "$1" && test -r "$1" && exec 5<&0 <"$1"; then for lalib_p_l in 1 2 3 4 do read lalib_p_line case $lalib_p_line in \#\ Generated\ by\ *$PACKAGE* ) lalib_p=yes; break;; esac done exec 0<&5 5<&- fi test yes = "$lalib_p" } # func_ltwrapper_script_p file # True iff FILE is a libtool wrapper script # This function is only a basic sanity check; it will hardly flush out # determined imposters. func_ltwrapper_script_p () { test -f "$1" && $lt_truncate_bin < "$1" 2>/dev/null | func_generated_by_libtool_p } # func_ltwrapper_executable_p file # True iff FILE is a libtool wrapper executable # This function is only a basic sanity check; it will hardly flush out # determined imposters. func_ltwrapper_executable_p () { func_ltwrapper_exec_suffix= case $1 in *.exe) ;; *) func_ltwrapper_exec_suffix=.exe ;; esac $GREP "$magic_exe" "$1$func_ltwrapper_exec_suffix" >/dev/null 2>&1 } # func_ltwrapper_scriptname file # Assumes file is an ltwrapper_executable # uses $file to determine the appropriate filename for a # temporary ltwrapper_script. func_ltwrapper_scriptname () { func_dirname_and_basename "$1" "" "." func_stripname '' '.exe' "$func_basename_result" func_ltwrapper_scriptname_result=$func_dirname_result/$objdir/${func_stripname_result}_ltshwrapper } # func_ltwrapper_p file # True iff FILE is a libtool wrapper script or wrapper executable # This function is only a basic sanity check; it will hardly flush out # determined imposters. func_ltwrapper_p () { func_ltwrapper_script_p "$1" || func_ltwrapper_executable_p "$1" } # func_execute_cmds commands fail_cmd # Execute tilde-delimited COMMANDS. # If FAIL_CMD is given, eval that upon failure. # FAIL_CMD may read-access the current command in variable CMD! func_execute_cmds () { $debug_cmd save_ifs=$IFS; IFS='~' for cmd in $1; do IFS=$sp$nl eval cmd=\"$cmd\" IFS=$save_ifs func_show_eval "$cmd" "${2-:}" done IFS=$save_ifs } # func_source file # Source FILE, adding directory component if necessary. # Note that it is not necessary on cygwin/mingw to append a dot to # FILE even if both FILE and FILE.exe exist: automatic-append-.exe # behavior happens only for exec(3), not for open(2)! Also, sourcing # 'FILE.' does not work on cygwin managed mounts. func_source () { $debug_cmd case $1 in */* | *\\*) . "$1" ;; *) . "./$1" ;; esac } # func_resolve_sysroot PATH # Replace a leading = in PATH with a sysroot. Store the result into # func_resolve_sysroot_result func_resolve_sysroot () { func_resolve_sysroot_result=$1 case $func_resolve_sysroot_result in =*) func_stripname '=' '' "$func_resolve_sysroot_result" func_resolve_sysroot_result=$lt_sysroot$func_stripname_result ;; esac } # func_replace_sysroot PATH # If PATH begins with the sysroot, replace it with = and # store the result into func_replace_sysroot_result. func_replace_sysroot () { case $lt_sysroot:$1 in ?*:"$lt_sysroot"*) func_stripname "$lt_sysroot" '' "$1" func_replace_sysroot_result='='$func_stripname_result ;; *) # Including no sysroot. func_replace_sysroot_result=$1 ;; esac } # func_infer_tag arg # Infer tagged configuration to use if any are available and # if one wasn't chosen via the "--tag" command line option. # Only attempt this if the compiler in the base compile # command doesn't match the default compiler. # arg is usually of the form 'gcc ...' func_infer_tag () { $debug_cmd if test -n "$available_tags" && test -z "$tagname"; then CC_quoted= for arg in $CC; do func_append_quoted CC_quoted "$arg" done CC_expanded=`func_echo_all $CC` CC_quoted_expanded=`func_echo_all $CC_quoted` case $@ in # Blanks in the command may have been stripped by the calling shell, # but not from the CC environment variable when configure was run. " $CC "* | "$CC "* | " $CC_expanded "* | "$CC_expanded "* | \ " $CC_quoted"* | "$CC_quoted "* | " $CC_quoted_expanded "* | "$CC_quoted_expanded "*) ;; # Blanks at the start of $base_compile will cause this to fail # if we don't check for them as well. *) for z in $available_tags; do if $GREP "^# ### BEGIN LIBTOOL TAG CONFIG: $z$" < "$progpath" > /dev/null; then # Evaluate the configuration. eval "`$SED -n -e '/^# ### BEGIN LIBTOOL TAG CONFIG: '$z'$/,/^# ### END LIBTOOL TAG CONFIG: '$z'$/p' < $progpath`" CC_quoted= for arg in $CC; do # Double-quote args containing other shell metacharacters. func_append_quoted CC_quoted "$arg" done CC_expanded=`func_echo_all $CC` CC_quoted_expanded=`func_echo_all $CC_quoted` case "$@ " in " $CC "* | "$CC "* | " $CC_expanded "* | "$CC_expanded "* | \ " $CC_quoted"* | "$CC_quoted "* | " $CC_quoted_expanded "* | "$CC_quoted_expanded "*) # The compiler in the base compile command matches # the one in the tagged configuration. # Assume this is the tagged configuration we want. tagname=$z break ;; esac fi done # If $tagname still isn't set, then no tagged configuration # was found and let the user know that the "--tag" command # line option must be used. if test -z "$tagname"; then func_echo "unable to infer tagged configuration" func_fatal_error "specify a tag with '--tag'" # else # func_verbose "using $tagname tagged configuration" fi ;; esac fi } # func_write_libtool_object output_name pic_name nonpic_name # Create a libtool object file (analogous to a ".la" file), # but don't create it if we're doing a dry run. func_write_libtool_object () { write_libobj=$1 if test yes = "$build_libtool_libs"; then write_lobj=\'$2\' else write_lobj=none fi if test yes = "$build_old_libs"; then write_oldobj=\'$3\' else write_oldobj=none fi $opt_dry_run || { cat >${write_libobj}T </dev/null` if test "$?" -eq 0 && test -n "$func_convert_core_file_wine_to_w32_tmp"; then func_convert_core_file_wine_to_w32_result=`$ECHO "$func_convert_core_file_wine_to_w32_tmp" | $SED -e "$sed_naive_backslashify"` else func_convert_core_file_wine_to_w32_result= fi fi } # end: func_convert_core_file_wine_to_w32 # func_convert_core_path_wine_to_w32 ARG # Helper function used by path conversion functions when $build is *nix, and # $host is mingw, cygwin, or some other w32 environment. Relies on a correctly # configured wine environment available, with the winepath program in $build's # $PATH. Assumes ARG has no leading or trailing path separator characters. # # ARG is path to be converted from $build format to win32. # Result is available in $func_convert_core_path_wine_to_w32_result. # Unconvertible file (directory) names in ARG are skipped; if no directory names # are convertible, then the result may be empty. func_convert_core_path_wine_to_w32 () { $debug_cmd # unfortunately, winepath doesn't convert paths, only file names func_convert_core_path_wine_to_w32_result= if test -n "$1"; then oldIFS=$IFS IFS=: for func_convert_core_path_wine_to_w32_f in $1; do IFS=$oldIFS func_convert_core_file_wine_to_w32 "$func_convert_core_path_wine_to_w32_f" if test -n "$func_convert_core_file_wine_to_w32_result"; then if test -z "$func_convert_core_path_wine_to_w32_result"; then func_convert_core_path_wine_to_w32_result=$func_convert_core_file_wine_to_w32_result else func_append func_convert_core_path_wine_to_w32_result ";$func_convert_core_file_wine_to_w32_result" fi fi done IFS=$oldIFS fi } # end: func_convert_core_path_wine_to_w32 # func_cygpath ARGS... # Wrapper around calling the cygpath program via LT_CYGPATH. This is used when # when (1) $build is *nix and Cygwin is hosted via a wine environment; or (2) # $build is MSYS and $host is Cygwin, or (3) $build is Cygwin. In case (1) or # (2), returns the Cygwin file name or path in func_cygpath_result (input # file name or path is assumed to be in w32 format, as previously converted # from $build's *nix or MSYS format). In case (3), returns the w32 file name # or path in func_cygpath_result (input file name or path is assumed to be in # Cygwin format). Returns an empty string on error. # # ARGS are passed to cygpath, with the last one being the file name or path to # be converted. # # Specify the absolute *nix (or w32) name to cygpath in the LT_CYGPATH # environment variable; do not put it in $PATH. func_cygpath () { $debug_cmd if test -n "$LT_CYGPATH" && test -f "$LT_CYGPATH"; then func_cygpath_result=`$LT_CYGPATH "$@" 2>/dev/null` if test "$?" -ne 0; then # on failure, ensure result is empty func_cygpath_result= fi else func_cygpath_result= func_error "LT_CYGPATH is empty or specifies non-existent file: '$LT_CYGPATH'" fi } #end: func_cygpath # func_convert_core_msys_to_w32 ARG # Convert file name or path ARG from MSYS format to w32 format. Return # result in func_convert_core_msys_to_w32_result. func_convert_core_msys_to_w32 () { $debug_cmd # awkward: cmd appends spaces to result func_convert_core_msys_to_w32_result=`( cmd //c echo "$1" ) 2>/dev/null | $SED -e 's/[ ]*$//' -e "$sed_naive_backslashify"` } #end: func_convert_core_msys_to_w32 # func_convert_file_check ARG1 ARG2 # Verify that ARG1 (a file name in $build format) was converted to $host # format in ARG2. Otherwise, emit an error message, but continue (resetting # func_to_host_file_result to ARG1). func_convert_file_check () { $debug_cmd if test -z "$2" && test -n "$1"; then func_error "Could not determine host file name corresponding to" func_error " '$1'" func_error "Continuing, but uninstalled executables may not work." # Fallback: func_to_host_file_result=$1 fi } # end func_convert_file_check # func_convert_path_check FROM_PATHSEP TO_PATHSEP FROM_PATH TO_PATH # Verify that FROM_PATH (a path in $build format) was converted to $host # format in TO_PATH. Otherwise, emit an error message, but continue, resetting # func_to_host_file_result to a simplistic fallback value (see below). func_convert_path_check () { $debug_cmd if test -z "$4" && test -n "$3"; then func_error "Could not determine the host path corresponding to" func_error " '$3'" func_error "Continuing, but uninstalled executables may not work." # Fallback. This is a deliberately simplistic "conversion" and # should not be "improved". See libtool.info. if test "x$1" != "x$2"; then lt_replace_pathsep_chars="s|$1|$2|g" func_to_host_path_result=`echo "$3" | $SED -e "$lt_replace_pathsep_chars"` else func_to_host_path_result=$3 fi fi } # end func_convert_path_check # func_convert_path_front_back_pathsep FRONTPAT BACKPAT REPL ORIG # Modifies func_to_host_path_result by prepending REPL if ORIG matches FRONTPAT # and appending REPL if ORIG matches BACKPAT. func_convert_path_front_back_pathsep () { $debug_cmd case $4 in $1 ) func_to_host_path_result=$3$func_to_host_path_result ;; esac case $4 in $2 ) func_append func_to_host_path_result "$3" ;; esac } # end func_convert_path_front_back_pathsep ################################################## # $build to $host FILE NAME CONVERSION FUNCTIONS # ################################################## # invoked via '$to_host_file_cmd ARG' # # In each case, ARG is the path to be converted from $build to $host format. # Result will be available in $func_to_host_file_result. # func_to_host_file ARG # Converts the file name ARG from $build format to $host format. Return result # in func_to_host_file_result. func_to_host_file () { $debug_cmd $to_host_file_cmd "$1" } # end func_to_host_file # func_to_tool_file ARG LAZY # converts the file name ARG from $build format to toolchain format. Return # result in func_to_tool_file_result. If the conversion in use is listed # in (the comma separated) LAZY, no conversion takes place. func_to_tool_file () { $debug_cmd case ,$2, in *,"$to_tool_file_cmd",*) func_to_tool_file_result=$1 ;; *) $to_tool_file_cmd "$1" func_to_tool_file_result=$func_to_host_file_result ;; esac } # end func_to_tool_file # func_convert_file_noop ARG # Copy ARG to func_to_host_file_result. func_convert_file_noop () { func_to_host_file_result=$1 } # end func_convert_file_noop # func_convert_file_msys_to_w32 ARG # Convert file name ARG from (mingw) MSYS to (mingw) w32 format; automatic # conversion to w32 is not available inside the cwrapper. Returns result in # func_to_host_file_result. func_convert_file_msys_to_w32 () { $debug_cmd func_to_host_file_result=$1 if test -n "$1"; then func_convert_core_msys_to_w32 "$1" func_to_host_file_result=$func_convert_core_msys_to_w32_result fi func_convert_file_check "$1" "$func_to_host_file_result" } # end func_convert_file_msys_to_w32 # func_convert_file_cygwin_to_w32 ARG # Convert file name ARG from Cygwin to w32 format. Returns result in # func_to_host_file_result. func_convert_file_cygwin_to_w32 () { $debug_cmd func_to_host_file_result=$1 if test -n "$1"; then # because $build is cygwin, we call "the" cygpath in $PATH; no need to use # LT_CYGPATH in this case. func_to_host_file_result=`cygpath -m "$1"` fi func_convert_file_check "$1" "$func_to_host_file_result" } # end func_convert_file_cygwin_to_w32 # func_convert_file_nix_to_w32 ARG # Convert file name ARG from *nix to w32 format. Requires a wine environment # and a working winepath. Returns result in func_to_host_file_result. func_convert_file_nix_to_w32 () { $debug_cmd func_to_host_file_result=$1 if test -n "$1"; then func_convert_core_file_wine_to_w32 "$1" func_to_host_file_result=$func_convert_core_file_wine_to_w32_result fi func_convert_file_check "$1" "$func_to_host_file_result" } # end func_convert_file_nix_to_w32 # func_convert_file_msys_to_cygwin ARG # Convert file name ARG from MSYS to Cygwin format. Requires LT_CYGPATH set. # Returns result in func_to_host_file_result. func_convert_file_msys_to_cygwin () { $debug_cmd func_to_host_file_result=$1 if test -n "$1"; then func_convert_core_msys_to_w32 "$1" func_cygpath -u "$func_convert_core_msys_to_w32_result" func_to_host_file_result=$func_cygpath_result fi func_convert_file_check "$1" "$func_to_host_file_result" } # end func_convert_file_msys_to_cygwin # func_convert_file_nix_to_cygwin ARG # Convert file name ARG from *nix to Cygwin format. Requires Cygwin installed # in a wine environment, working winepath, and LT_CYGPATH set. Returns result # in func_to_host_file_result. func_convert_file_nix_to_cygwin () { $debug_cmd func_to_host_file_result=$1 if test -n "$1"; then # convert from *nix to w32, then use cygpath to convert from w32 to cygwin. func_convert_core_file_wine_to_w32 "$1" func_cygpath -u "$func_convert_core_file_wine_to_w32_result" func_to_host_file_result=$func_cygpath_result fi func_convert_file_check "$1" "$func_to_host_file_result" } # end func_convert_file_nix_to_cygwin ############################################# # $build to $host PATH CONVERSION FUNCTIONS # ############################################# # invoked via '$to_host_path_cmd ARG' # # In each case, ARG is the path to be converted from $build to $host format. # The result will be available in $func_to_host_path_result. # # Path separators are also converted from $build format to $host format. If # ARG begins or ends with a path separator character, it is preserved (but # converted to $host format) on output. # # All path conversion functions are named using the following convention: # file name conversion function : func_convert_file_X_to_Y () # path conversion function : func_convert_path_X_to_Y () # where, for any given $build/$host combination the 'X_to_Y' value is the # same. If conversion functions are added for new $build/$host combinations, # the two new functions must follow this pattern, or func_init_to_host_path_cmd # will break. # func_init_to_host_path_cmd # Ensures that function "pointer" variable $to_host_path_cmd is set to the # appropriate value, based on the value of $to_host_file_cmd. to_host_path_cmd= func_init_to_host_path_cmd () { $debug_cmd if test -z "$to_host_path_cmd"; then func_stripname 'func_convert_file_' '' "$to_host_file_cmd" to_host_path_cmd=func_convert_path_$func_stripname_result fi } # func_to_host_path ARG # Converts the path ARG from $build format to $host format. Return result # in func_to_host_path_result. func_to_host_path () { $debug_cmd func_init_to_host_path_cmd $to_host_path_cmd "$1" } # end func_to_host_path # func_convert_path_noop ARG # Copy ARG to func_to_host_path_result. func_convert_path_noop () { func_to_host_path_result=$1 } # end func_convert_path_noop # func_convert_path_msys_to_w32 ARG # Convert path ARG from (mingw) MSYS to (mingw) w32 format; automatic # conversion to w32 is not available inside the cwrapper. Returns result in # func_to_host_path_result. func_convert_path_msys_to_w32 () { $debug_cmd func_to_host_path_result=$1 if test -n "$1"; then # Remove leading and trailing path separator characters from ARG. MSYS # behavior is inconsistent here; cygpath turns them into '.;' and ';.'; # and winepath ignores them completely. func_stripname : : "$1" func_to_host_path_tmp1=$func_stripname_result func_convert_core_msys_to_w32 "$func_to_host_path_tmp1" func_to_host_path_result=$func_convert_core_msys_to_w32_result func_convert_path_check : ";" \ "$func_to_host_path_tmp1" "$func_to_host_path_result" func_convert_path_front_back_pathsep ":*" "*:" ";" "$1" fi } # end func_convert_path_msys_to_w32 # func_convert_path_cygwin_to_w32 ARG # Convert path ARG from Cygwin to w32 format. Returns result in # func_to_host_file_result. func_convert_path_cygwin_to_w32 () { $debug_cmd func_to_host_path_result=$1 if test -n "$1"; then # See func_convert_path_msys_to_w32: func_stripname : : "$1" func_to_host_path_tmp1=$func_stripname_result func_to_host_path_result=`cygpath -m -p "$func_to_host_path_tmp1"` func_convert_path_check : ";" \ "$func_to_host_path_tmp1" "$func_to_host_path_result" func_convert_path_front_back_pathsep ":*" "*:" ";" "$1" fi } # end func_convert_path_cygwin_to_w32 # func_convert_path_nix_to_w32 ARG # Convert path ARG from *nix to w32 format. Requires a wine environment and # a working winepath. Returns result in func_to_host_file_result. func_convert_path_nix_to_w32 () { $debug_cmd func_to_host_path_result=$1 if test -n "$1"; then # See func_convert_path_msys_to_w32: func_stripname : : "$1" func_to_host_path_tmp1=$func_stripname_result func_convert_core_path_wine_to_w32 "$func_to_host_path_tmp1" func_to_host_path_result=$func_convert_core_path_wine_to_w32_result func_convert_path_check : ";" \ "$func_to_host_path_tmp1" "$func_to_host_path_result" func_convert_path_front_back_pathsep ":*" "*:" ";" "$1" fi } # end func_convert_path_nix_to_w32 # func_convert_path_msys_to_cygwin ARG # Convert path ARG from MSYS to Cygwin format. Requires LT_CYGPATH set. # Returns result in func_to_host_file_result. func_convert_path_msys_to_cygwin () { $debug_cmd func_to_host_path_result=$1 if test -n "$1"; then # See func_convert_path_msys_to_w32: func_stripname : : "$1" func_to_host_path_tmp1=$func_stripname_result func_convert_core_msys_to_w32 "$func_to_host_path_tmp1" func_cygpath -u -p "$func_convert_core_msys_to_w32_result" func_to_host_path_result=$func_cygpath_result func_convert_path_check : : \ "$func_to_host_path_tmp1" "$func_to_host_path_result" func_convert_path_front_back_pathsep ":*" "*:" : "$1" fi } # end func_convert_path_msys_to_cygwin # func_convert_path_nix_to_cygwin ARG # Convert path ARG from *nix to Cygwin format. Requires Cygwin installed in a # a wine environment, working winepath, and LT_CYGPATH set. Returns result in # func_to_host_file_result. func_convert_path_nix_to_cygwin () { $debug_cmd func_to_host_path_result=$1 if test -n "$1"; then # Remove leading and trailing path separator characters from # ARG. msys behavior is inconsistent here, cygpath turns them # into '.;' and ';.', and winepath ignores them completely. func_stripname : : "$1" func_to_host_path_tmp1=$func_stripname_result func_convert_core_path_wine_to_w32 "$func_to_host_path_tmp1" func_cygpath -u -p "$func_convert_core_path_wine_to_w32_result" func_to_host_path_result=$func_cygpath_result func_convert_path_check : : \ "$func_to_host_path_tmp1" "$func_to_host_path_result" func_convert_path_front_back_pathsep ":*" "*:" : "$1" fi } # end func_convert_path_nix_to_cygwin # func_dll_def_p FILE # True iff FILE is a Windows DLL '.def' file. # Keep in sync with _LT_DLL_DEF_P in libtool.m4 func_dll_def_p () { $debug_cmd func_dll_def_p_tmp=`$SED -n \ -e 's/^[ ]*//' \ -e '/^\(;.*\)*$/d' \ -e 's/^\(EXPORTS\|LIBRARY\)\([ ].*\)*$/DEF/p' \ -e q \ "$1"` test DEF = "$func_dll_def_p_tmp" } # func_mode_compile arg... func_mode_compile () { $debug_cmd # Get the compilation command and the source file. base_compile= srcfile=$nonopt # always keep a non-empty value in "srcfile" suppress_opt=yes suppress_output= arg_mode=normal libobj= later= pie_flag= for arg do case $arg_mode in arg ) # do not "continue". Instead, add this to base_compile lastarg=$arg arg_mode=normal ;; target ) libobj=$arg arg_mode=normal continue ;; normal ) # Accept any command-line options. case $arg in -o) test -n "$libobj" && \ func_fatal_error "you cannot specify '-o' more than once" arg_mode=target continue ;; -pie | -fpie | -fPIE) func_append pie_flag " $arg" continue ;; -shared | -static | -prefer-pic | -prefer-non-pic) func_append later " $arg" continue ;; -no-suppress) suppress_opt=no continue ;; -Xcompiler) arg_mode=arg # the next one goes into the "base_compile" arg list continue # The current "srcfile" will either be retained or ;; # replaced later. I would guess that would be a bug. -Wc,*) func_stripname '-Wc,' '' "$arg" args=$func_stripname_result lastarg= save_ifs=$IFS; IFS=, for arg in $args; do IFS=$save_ifs func_append_quoted lastarg "$arg" done IFS=$save_ifs func_stripname ' ' '' "$lastarg" lastarg=$func_stripname_result # Add the arguments to base_compile. func_append base_compile " $lastarg" continue ;; *) # Accept the current argument as the source file. # The previous "srcfile" becomes the current argument. # lastarg=$srcfile srcfile=$arg ;; esac # case $arg ;; esac # case $arg_mode # Aesthetically quote the previous argument. func_append_quoted base_compile "$lastarg" done # for arg case $arg_mode in arg) func_fatal_error "you must specify an argument for -Xcompile" ;; target) func_fatal_error "you must specify a target with '-o'" ;; *) # Get the name of the library object. test -z "$libobj" && { func_basename "$srcfile" libobj=$func_basename_result } ;; esac # Recognize several different file suffixes. # If the user specifies -o file.o, it is replaced with file.lo case $libobj in *.[cCFSifmso] | \ *.ada | *.adb | *.ads | *.asm | \ *.c++ | *.cc | *.ii | *.class | *.cpp | *.cxx | \ *.[fF][09]? | *.for | *.java | *.go | *.obj | *.sx | *.cu | *.cup) func_xform "$libobj" libobj=$func_xform_result ;; esac case $libobj in *.lo) func_lo2o "$libobj"; obj=$func_lo2o_result ;; *) func_fatal_error "cannot determine name of library object from '$libobj'" ;; esac func_infer_tag $base_compile for arg in $later; do case $arg in -shared) test yes = "$build_libtool_libs" \ || func_fatal_configuration "cannot build a shared library" build_old_libs=no continue ;; -static) build_libtool_libs=no build_old_libs=yes continue ;; -prefer-pic) pic_mode=yes continue ;; -prefer-non-pic) pic_mode=no continue ;; esac done func_quote_for_eval "$libobj" test "X$libobj" != "X$func_quote_for_eval_result" \ && $ECHO "X$libobj" | $GREP '[]~#^*{};<>?"'"'"' &()|`$[]' \ && func_warning "libobj name '$libobj' may not contain shell special characters." func_dirname_and_basename "$obj" "/" "" objname=$func_basename_result xdir=$func_dirname_result lobj=$xdir$objdir/$objname test -z "$base_compile" && \ func_fatal_help "you must specify a compilation command" # Delete any leftover library objects. if test yes = "$build_old_libs"; then removelist="$obj $lobj $libobj ${libobj}T" else removelist="$lobj $libobj ${libobj}T" fi # On Cygwin there's no "real" PIC flag so we must build both object types case $host_os in cygwin* | mingw* | pw32* | os2* | cegcc*) pic_mode=default ;; esac if test no = "$pic_mode" && test pass_all != "$deplibs_check_method"; then # non-PIC code in shared libraries is not supported pic_mode=default fi # Calculate the filename of the output object if compiler does # not support -o with -c if test no = "$compiler_c_o"; then output_obj=`$ECHO "$srcfile" | $SED 's%^.*/%%; s%\.[^.]*$%%'`.$objext lockfile=$output_obj.lock else output_obj= need_locks=no lockfile= fi # Lock this critical section if it is needed # We use this script file to make the link, it avoids creating a new file if test yes = "$need_locks"; then until $opt_dry_run || ln "$progpath" "$lockfile" 2>/dev/null; do func_echo "Waiting for $lockfile to be removed" sleep 2 done elif test warn = "$need_locks"; then if test -f "$lockfile"; then $ECHO "\ *** ERROR, $lockfile exists and contains: `cat $lockfile 2>/dev/null` This indicates that another process is trying to use the same temporary object file, and libtool could not work around it because your compiler does not support '-c' and '-o' together. If you repeat this compilation, it may succeed, by chance, but you had better avoid parallel builds (make -j) in this platform, or get a better compiler." $opt_dry_run || $RM $removelist exit $EXIT_FAILURE fi func_append removelist " $output_obj" $ECHO "$srcfile" > "$lockfile" fi $opt_dry_run || $RM $removelist func_append removelist " $lockfile" trap '$opt_dry_run || $RM $removelist; exit $EXIT_FAILURE' 1 2 15 func_to_tool_file "$srcfile" func_convert_file_msys_to_w32 srcfile=$func_to_tool_file_result func_quote_for_eval "$srcfile" qsrcfile=$func_quote_for_eval_result # Only build a PIC object if we are building libtool libraries. if test yes = "$build_libtool_libs"; then # Without this assignment, base_compile gets emptied. fbsd_hideous_sh_bug=$base_compile if test no != "$pic_mode"; then command="$base_compile $qsrcfile $pic_flag" else # Don't build PIC code command="$base_compile $qsrcfile" fi func_mkdir_p "$xdir$objdir" if test -z "$output_obj"; then # Place PIC objects in $objdir func_append command " -o $lobj" fi func_show_eval_locale "$command" \ 'test -n "$output_obj" && $RM $removelist; exit $EXIT_FAILURE' if test warn = "$need_locks" && test "X`cat $lockfile 2>/dev/null`" != "X$srcfile"; then $ECHO "\ *** ERROR, $lockfile contains: `cat $lockfile 2>/dev/null` but it should contain: $srcfile This indicates that another process is trying to use the same temporary object file, and libtool could not work around it because your compiler does not support '-c' and '-o' together. If you repeat this compilation, it may succeed, by chance, but you had better avoid parallel builds (make -j) in this platform, or get a better compiler." $opt_dry_run || $RM $removelist exit $EXIT_FAILURE fi # Just move the object if needed, then go on to compile the next one if test -n "$output_obj" && test "X$output_obj" != "X$lobj"; then func_show_eval '$MV "$output_obj" "$lobj"' \ 'error=$?; $opt_dry_run || $RM $removelist; exit $error' fi # Allow error messages only from the first compilation. if test yes = "$suppress_opt"; then suppress_output=' >/dev/null 2>&1' fi fi # Only build a position-dependent object if we build old libraries. if test yes = "$build_old_libs"; then if test yes != "$pic_mode"; then # Don't build PIC code command="$base_compile $qsrcfile$pie_flag" else command="$base_compile $qsrcfile $pic_flag" fi if test yes = "$compiler_c_o"; then func_append command " -o $obj" fi # Suppress compiler output if we already did a PIC compilation. func_append command "$suppress_output" func_show_eval_locale "$command" \ '$opt_dry_run || $RM $removelist; exit $EXIT_FAILURE' if test warn = "$need_locks" && test "X`cat $lockfile 2>/dev/null`" != "X$srcfile"; then $ECHO "\ *** ERROR, $lockfile contains: `cat $lockfile 2>/dev/null` but it should contain: $srcfile This indicates that another process is trying to use the same temporary object file, and libtool could not work around it because your compiler does not support '-c' and '-o' together. If you repeat this compilation, it may succeed, by chance, but you had better avoid parallel builds (make -j) in this platform, or get a better compiler." $opt_dry_run || $RM $removelist exit $EXIT_FAILURE fi # Just move the object if needed if test -n "$output_obj" && test "X$output_obj" != "X$obj"; then func_show_eval '$MV "$output_obj" "$obj"' \ 'error=$?; $opt_dry_run || $RM $removelist; exit $error' fi fi $opt_dry_run || { func_write_libtool_object "$libobj" "$objdir/$objname" "$objname" # Unlock the critical section if it was locked if test no != "$need_locks"; then removelist=$lockfile $RM "$lockfile" fi } exit $EXIT_SUCCESS } $opt_help || { test compile = "$opt_mode" && func_mode_compile ${1+"$@"} } func_mode_help () { # We need to display help for each of the modes. case $opt_mode in "") # Generic help is extracted from the usage comments # at the start of this file. func_help ;; clean) $ECHO \ "Usage: $progname [OPTION]... --mode=clean RM [RM-OPTION]... FILE... Remove files from the build directory. RM is the name of the program to use to delete files associated with each FILE (typically '/bin/rm'). RM-OPTIONS are options (such as '-f') to be passed to RM. If FILE is a libtool library, object or program, all the files associated with it are deleted. Otherwise, only FILE itself is deleted using RM." ;; compile) $ECHO \ "Usage: $progname [OPTION]... --mode=compile COMPILE-COMMAND... SOURCEFILE Compile a source file into a libtool library object. This mode accepts the following additional options: -o OUTPUT-FILE set the output file name to OUTPUT-FILE -no-suppress do not suppress compiler output for multiple passes -prefer-pic try to build PIC objects only -prefer-non-pic try to build non-PIC objects only -shared do not build a '.o' file suitable for static linking -static only build a '.o' file suitable for static linking -Wc,FLAG pass FLAG directly to the compiler COMPILE-COMMAND is a command to be used in creating a 'standard' object file from the given SOURCEFILE. The output file name is determined by removing the directory component from SOURCEFILE, then substituting the C source code suffix '.c' with the library object suffix, '.lo'." ;; execute) $ECHO \ "Usage: $progname [OPTION]... --mode=execute COMMAND [ARGS]... Automatically set library path, then run a program. This mode accepts the following additional options: -dlopen FILE add the directory containing FILE to the library path This mode sets the library path environment variable according to '-dlopen' flags. If any of the ARGS are libtool executable wrappers, then they are translated into their corresponding uninstalled binary, and any of their required library directories are added to the library path. Then, COMMAND is executed, with ARGS as arguments." ;; finish) $ECHO \ "Usage: $progname [OPTION]... --mode=finish [LIBDIR]... Complete the installation of libtool libraries. Each LIBDIR is a directory that contains libtool libraries. The commands that this mode executes may require superuser privileges. Use the '--dry-run' option if you just want to see what would be executed." ;; install) $ECHO \ "Usage: $progname [OPTION]... --mode=install INSTALL-COMMAND... Install executables or libraries. INSTALL-COMMAND is the installation command. The first component should be either the 'install' or 'cp' program. The following components of INSTALL-COMMAND are treated specially: -inst-prefix-dir PREFIX-DIR Use PREFIX-DIR as a staging area for installation The rest of the components are interpreted as arguments to that command (only BSD-compatible install options are recognized)." ;; link) $ECHO \ "Usage: $progname [OPTION]... --mode=link LINK-COMMAND... Link object files or libraries together to form another library, or to create an executable program. LINK-COMMAND is a command using the C compiler that you would use to create a program from several object files. The following components of LINK-COMMAND are treated specially: -all-static do not do any dynamic linking at all -avoid-version do not add a version suffix if possible -bindir BINDIR specify path to binaries directory (for systems where libraries must be found in the PATH setting at runtime) -dlopen FILE '-dlpreopen' FILE if it cannot be dlopened at runtime -dlpreopen FILE link in FILE and add its symbols to lt_preloaded_symbols -export-dynamic allow symbols from OUTPUT-FILE to be resolved with dlsym(3) -export-symbols SYMFILE try to export only the symbols listed in SYMFILE -export-symbols-regex REGEX try to export only the symbols matching REGEX -LLIBDIR search LIBDIR for required installed libraries -lNAME OUTPUT-FILE requires the installed library libNAME -module build a library that can dlopened -no-fast-install disable the fast-install mode -no-install link a not-installable executable -no-undefined declare that a library does not refer to external symbols -o OUTPUT-FILE create OUTPUT-FILE from the specified objects -objectlist FILE use a list of object files found in FILE to specify objects -os2dllname NAME force a short DLL name on OS/2 (no effect on other OSes) -precious-files-regex REGEX don't remove output files matching REGEX -release RELEASE specify package release information -rpath LIBDIR the created library will eventually be installed in LIBDIR -R[ ]LIBDIR add LIBDIR to the runtime path of programs and libraries -shared only do dynamic linking of libtool libraries -shrext SUFFIX override the standard shared library file extension -static do not do any dynamic linking of uninstalled libtool libraries -static-libtool-libs do not do any dynamic linking of libtool libraries -version-info CURRENT[:REVISION[:AGE]] specify library version info [each variable defaults to 0] -weak LIBNAME declare that the target provides the LIBNAME interface -Wc,FLAG -Xcompiler FLAG pass linker-specific FLAG directly to the compiler -Wl,FLAG -Xlinker FLAG pass linker-specific FLAG directly to the linker -XCClinker FLAG pass link-specific FLAG to the compiler driver (CC) All other options (arguments beginning with '-') are ignored. Every other argument is treated as a filename. Files ending in '.la' are treated as uninstalled libtool libraries, other files are standard or library object files. If the OUTPUT-FILE ends in '.la', then a libtool library is created, only library objects ('.lo' files) may be specified, and '-rpath' is required, except when creating a convenience library. If OUTPUT-FILE ends in '.a' or '.lib', then a standard library is created using 'ar' and 'ranlib', or on Windows using 'lib'. If OUTPUT-FILE ends in '.lo' or '.$objext', then a reloadable object file is created, otherwise an executable program is created." ;; uninstall) $ECHO \ "Usage: $progname [OPTION]... --mode=uninstall RM [RM-OPTION]... FILE... Remove libraries from an installation directory. RM is the name of the program to use to delete files associated with each FILE (typically '/bin/rm'). RM-OPTIONS are options (such as '-f') to be passed to RM. If FILE is a libtool library, all the files associated with it are deleted. Otherwise, only FILE itself is deleted using RM." ;; *) func_fatal_help "invalid operation mode '$opt_mode'" ;; esac echo $ECHO "Try '$progname --help' for more information about other modes." } # Now that we've collected a possible --mode arg, show help if necessary if $opt_help; then if test : = "$opt_help"; then func_mode_help else { func_help noexit for opt_mode in compile link execute install finish uninstall clean; do func_mode_help done } | $SED -n '1p; 2,$s/^Usage:/ or: /p' { func_help noexit for opt_mode in compile link execute install finish uninstall clean; do echo func_mode_help done } | $SED '1d /^When reporting/,/^Report/{ H d } $x /information about other modes/d /more detailed .*MODE/d s/^Usage:.*--mode=\([^ ]*\) .*/Description of \1 mode:/' fi exit $? fi # func_mode_execute arg... func_mode_execute () { $debug_cmd # The first argument is the command name. cmd=$nonopt test -z "$cmd" && \ func_fatal_help "you must specify a COMMAND" # Handle -dlopen flags immediately. for file in $opt_dlopen; do test -f "$file" \ || func_fatal_help "'$file' is not a file" dir= case $file in *.la) func_resolve_sysroot "$file" file=$func_resolve_sysroot_result # Check to see that this really is a libtool archive. func_lalib_unsafe_p "$file" \ || func_fatal_help "'$lib' is not a valid libtool archive" # Read the libtool library. dlname= library_names= func_source "$file" # Skip this library if it cannot be dlopened. if test -z "$dlname"; then # Warn if it was a shared library. test -n "$library_names" && \ func_warning "'$file' was not linked with '-export-dynamic'" continue fi func_dirname "$file" "" "." dir=$func_dirname_result if test -f "$dir/$objdir/$dlname"; then func_append dir "/$objdir" else if test ! -f "$dir/$dlname"; then func_fatal_error "cannot find '$dlname' in '$dir' or '$dir/$objdir'" fi fi ;; *.lo) # Just add the directory containing the .lo file. func_dirname "$file" "" "." dir=$func_dirname_result ;; *) func_warning "'-dlopen' is ignored for non-libtool libraries and objects" continue ;; esac # Get the absolute pathname. absdir=`cd "$dir" && pwd` test -n "$absdir" && dir=$absdir # Now add the directory to shlibpath_var. if eval "test -z \"\$$shlibpath_var\""; then eval "$shlibpath_var=\"\$dir\"" else eval "$shlibpath_var=\"\$dir:\$$shlibpath_var\"" fi done # This variable tells wrapper scripts just to set shlibpath_var # rather than running their programs. libtool_execute_magic=$magic # Check if any of the arguments is a wrapper script. args= for file do case $file in -* | *.la | *.lo ) ;; *) # Do a test to see if this is really a libtool program. if func_ltwrapper_script_p "$file"; then func_source "$file" # Transform arg to wrapped name. file=$progdir/$program elif func_ltwrapper_executable_p "$file"; then func_ltwrapper_scriptname "$file" func_source "$func_ltwrapper_scriptname_result" # Transform arg to wrapped name. file=$progdir/$program fi ;; esac # Quote arguments (to preserve shell metacharacters). func_append_quoted args "$file" done if $opt_dry_run; then # Display what would be done. if test -n "$shlibpath_var"; then eval "\$ECHO \"\$shlibpath_var=\$$shlibpath_var\"" echo "export $shlibpath_var" fi $ECHO "$cmd$args" exit $EXIT_SUCCESS else if test -n "$shlibpath_var"; then # Export the shlibpath_var. eval "export $shlibpath_var" fi # Restore saved environment variables for lt_var in LANG LANGUAGE LC_ALL LC_CTYPE LC_COLLATE LC_MESSAGES do eval "if test \"\${save_$lt_var+set}\" = set; then $lt_var=\$save_$lt_var; export $lt_var else $lt_unset $lt_var fi" done # Now prepare to actually exec the command. exec_cmd=\$cmd$args fi } test execute = "$opt_mode" && func_mode_execute ${1+"$@"} # func_mode_finish arg... func_mode_finish () { $debug_cmd libs= libdirs= admincmds= for opt in "$nonopt" ${1+"$@"} do if test -d "$opt"; then func_append libdirs " $opt" elif test -f "$opt"; then if func_lalib_unsafe_p "$opt"; then func_append libs " $opt" else func_warning "'$opt' is not a valid libtool archive" fi else func_fatal_error "invalid argument '$opt'" fi done if test -n "$libs"; then if test -n "$lt_sysroot"; then sysroot_regex=`$ECHO "$lt_sysroot" | $SED "$sed_make_literal_regex"` sysroot_cmd="s/\([ ']\)$sysroot_regex/\1/g;" else sysroot_cmd= fi # Remove sysroot references if $opt_dry_run; then for lib in $libs; do echo "removing references to $lt_sysroot and '=' prefixes from $lib" done else tmpdir=`func_mktempdir` for lib in $libs; do $SED -e "$sysroot_cmd s/\([ ']-[LR]\)=/\1/g; s/\([ ']\)=/\1/g" $lib \ > $tmpdir/tmp-la mv -f $tmpdir/tmp-la $lib done ${RM}r "$tmpdir" fi fi if test -n "$finish_cmds$finish_eval" && test -n "$libdirs"; then for libdir in $libdirs; do if test -n "$finish_cmds"; then # Do each command in the finish commands. func_execute_cmds "$finish_cmds" 'admincmds="$admincmds '"$cmd"'"' fi if test -n "$finish_eval"; then # Do the single finish_eval. eval cmds=\"$finish_eval\" $opt_dry_run || eval "$cmds" || func_append admincmds " $cmds" fi done fi # Exit here if they wanted silent mode. $opt_quiet && exit $EXIT_SUCCESS if test -n "$finish_cmds$finish_eval" && test -n "$libdirs"; then echo "----------------------------------------------------------------------" echo "Libraries have been installed in:" for libdir in $libdirs; do $ECHO " $libdir" done echo echo "If you ever happen to want to link against installed libraries" echo "in a given directory, LIBDIR, you must either use libtool, and" echo "specify the full pathname of the library, or use the '-LLIBDIR'" echo "flag during linking and do at least one of the following:" if test -n "$shlibpath_var"; then echo " - add LIBDIR to the '$shlibpath_var' environment variable" echo " during execution" fi if test -n "$runpath_var"; then echo " - add LIBDIR to the '$runpath_var' environment variable" echo " during linking" fi if test -n "$hardcode_libdir_flag_spec"; then libdir=LIBDIR eval flag=\"$hardcode_libdir_flag_spec\" $ECHO " - use the '$flag' linker flag" fi if test -n "$admincmds"; then $ECHO " - have your system administrator run these commands:$admincmds" fi if test -f /etc/ld.so.conf; then echo " - have your system administrator add LIBDIR to '/etc/ld.so.conf'" fi echo echo "See any operating system documentation about shared libraries for" case $host in solaris2.[6789]|solaris2.1[0-9]) echo "more information, such as the ld(1), crle(1) and ld.so(8) manual" echo "pages." ;; *) echo "more information, such as the ld(1) and ld.so(8) manual pages." ;; esac echo "----------------------------------------------------------------------" fi exit $EXIT_SUCCESS } test finish = "$opt_mode" && func_mode_finish ${1+"$@"} # func_mode_install arg... func_mode_install () { $debug_cmd # There may be an optional sh(1) argument at the beginning of # install_prog (especially on Windows NT). if test "$SHELL" = "$nonopt" || test /bin/sh = "$nonopt" || # Allow the use of GNU shtool's install command. case $nonopt in *shtool*) :;; *) false;; esac then # Aesthetically quote it. func_quote_for_eval "$nonopt" install_prog="$func_quote_for_eval_result " arg=$1 shift else install_prog= arg=$nonopt fi # The real first argument should be the name of the installation program. # Aesthetically quote it. func_quote_for_eval "$arg" func_append install_prog "$func_quote_for_eval_result" install_shared_prog=$install_prog case " $install_prog " in *[\\\ /]cp\ *) install_cp=: ;; *) install_cp=false ;; esac # We need to accept at least all the BSD install flags. dest= files= opts= prev= install_type= isdir=false stripme= no_mode=: for arg do arg2= if test -n "$dest"; then func_append files " $dest" dest=$arg continue fi case $arg in -d) isdir=: ;; -f) if $install_cp; then :; else prev=$arg fi ;; -g | -m | -o) prev=$arg ;; -s) stripme=" -s" continue ;; -*) ;; *) # If the previous option needed an argument, then skip it. if test -n "$prev"; then if test X-m = "X$prev" && test -n "$install_override_mode"; then arg2=$install_override_mode no_mode=false fi prev= else dest=$arg continue fi ;; esac # Aesthetically quote the argument. func_quote_for_eval "$arg" func_append install_prog " $func_quote_for_eval_result" if test -n "$arg2"; then func_quote_for_eval "$arg2" fi func_append install_shared_prog " $func_quote_for_eval_result" done test -z "$install_prog" && \ func_fatal_help "you must specify an install program" test -n "$prev" && \ func_fatal_help "the '$prev' option requires an argument" if test -n "$install_override_mode" && $no_mode; then if $install_cp; then :; else func_quote_for_eval "$install_override_mode" func_append install_shared_prog " -m $func_quote_for_eval_result" fi fi if test -z "$files"; then if test -z "$dest"; then func_fatal_help "no file or destination specified" else func_fatal_help "you must specify a destination" fi fi # Strip any trailing slash from the destination. func_stripname '' '/' "$dest" dest=$func_stripname_result # Check to see that the destination is a directory. test -d "$dest" && isdir=: if $isdir; then destdir=$dest destname= else func_dirname_and_basename "$dest" "" "." destdir=$func_dirname_result destname=$func_basename_result # Not a directory, so check to see that there is only one file specified. set dummy $files; shift test "$#" -gt 1 && \ func_fatal_help "'$dest' is not a directory" fi case $destdir in [\\/]* | [A-Za-z]:[\\/]*) ;; *) for file in $files; do case $file in *.lo) ;; *) func_fatal_help "'$destdir' must be an absolute directory name" ;; esac done ;; esac # This variable tells wrapper scripts just to set variables rather # than running their programs. libtool_install_magic=$magic staticlibs= future_libdirs= current_libdirs= for file in $files; do # Do each installation. case $file in *.$libext) # Do the static libraries later. func_append staticlibs " $file" ;; *.la) func_resolve_sysroot "$file" file=$func_resolve_sysroot_result # Check to see that this really is a libtool archive. func_lalib_unsafe_p "$file" \ || func_fatal_help "'$file' is not a valid libtool archive" library_names= old_library= relink_command= func_source "$file" # Add the libdir to current_libdirs if it is the destination. if test "X$destdir" = "X$libdir"; then case "$current_libdirs " in *" $libdir "*) ;; *) func_append current_libdirs " $libdir" ;; esac else # Note the libdir as a future libdir. case "$future_libdirs " in *" $libdir "*) ;; *) func_append future_libdirs " $libdir" ;; esac fi func_dirname "$file" "/" "" dir=$func_dirname_result func_append dir "$objdir" if test -n "$relink_command"; then # Determine the prefix the user has applied to our future dir. inst_prefix_dir=`$ECHO "$destdir" | $SED -e "s%$libdir\$%%"` # Don't allow the user to place us outside of our expected # location b/c this prevents finding dependent libraries that # are installed to the same prefix. # At present, this check doesn't affect windows .dll's that # are installed into $libdir/../bin (currently, that works fine) # but it's something to keep an eye on. test "$inst_prefix_dir" = "$destdir" && \ func_fatal_error "error: cannot install '$file' to a directory not ending in $libdir" if test -n "$inst_prefix_dir"; then # Stick the inst_prefix_dir data into the link command. relink_command=`$ECHO "$relink_command" | $SED "s%@inst_prefix_dir@%-inst-prefix-dir $inst_prefix_dir%"` else relink_command=`$ECHO "$relink_command" | $SED "s%@inst_prefix_dir@%%"` fi func_warning "relinking '$file'" func_show_eval "$relink_command" \ 'func_fatal_error "error: relink '\''$file'\'' with the above command before installing it"' fi # See the names of the shared library. set dummy $library_names; shift if test -n "$1"; then realname=$1 shift srcname=$realname test -n "$relink_command" && srcname=${realname}T # Install the shared library and build the symlinks. func_show_eval "$install_shared_prog $dir/$srcname $destdir/$realname" \ 'exit $?' tstripme=$stripme case $host_os in cygwin* | mingw* | pw32* | cegcc*) case $realname in *.dll.a) tstripme= ;; esac ;; os2*) case $realname in *_dll.a) tstripme= ;; esac ;; esac if test -n "$tstripme" && test -n "$striplib"; then func_show_eval "$striplib $destdir/$realname" 'exit $?' fi if test "$#" -gt 0; then # Delete the old symlinks, and create new ones. # Try 'ln -sf' first, because the 'ln' binary might depend on # the symlink we replace! Solaris /bin/ln does not understand -f, # so we also need to try rm && ln -s. for linkname do test "$linkname" != "$realname" \ && func_show_eval "(cd $destdir && { $LN_S -f $realname $linkname || { $RM $linkname && $LN_S $realname $linkname; }; })" done fi # Do each command in the postinstall commands. lib=$destdir/$realname func_execute_cmds "$postinstall_cmds" 'exit $?' fi # Install the pseudo-library for information purposes. func_basename "$file" name=$func_basename_result instname=$dir/${name}i func_show_eval "$install_prog $instname $destdir/$name" 'exit $?' # Maybe install the static library, too. test -n "$old_library" && func_append staticlibs " $dir/$old_library" ;; *.lo) # Install (i.e. copy) a libtool object. # Figure out destination file name, if it wasn't already specified. if test -n "$destname"; then destfile=$destdir/$destname else func_basename "$file" destfile=$func_basename_result destfile=$destdir/$destfile fi # Deduce the name of the destination old-style object file. case $destfile in *.lo) func_lo2o "$destfile" staticdest=$func_lo2o_result ;; *.$objext) staticdest=$destfile destfile= ;; *) func_fatal_help "cannot copy a libtool object to '$destfile'" ;; esac # Install the libtool object if requested. test -n "$destfile" && \ func_show_eval "$install_prog $file $destfile" 'exit $?' # Install the old object if enabled. if test yes = "$build_old_libs"; then # Deduce the name of the old-style object file. func_lo2o "$file" staticobj=$func_lo2o_result func_show_eval "$install_prog \$staticobj \$staticdest" 'exit $?' fi exit $EXIT_SUCCESS ;; *) # Figure out destination file name, if it wasn't already specified. if test -n "$destname"; then destfile=$destdir/$destname else func_basename "$file" destfile=$func_basename_result destfile=$destdir/$destfile fi # If the file is missing, and there is a .exe on the end, strip it # because it is most likely a libtool script we actually want to # install stripped_ext= case $file in *.exe) if test ! -f "$file"; then func_stripname '' '.exe' "$file" file=$func_stripname_result stripped_ext=.exe fi ;; esac # Do a test to see if this is really a libtool program. case $host in *cygwin* | *mingw*) if func_ltwrapper_executable_p "$file"; then func_ltwrapper_scriptname "$file" wrapper=$func_ltwrapper_scriptname_result else func_stripname '' '.exe' "$file" wrapper=$func_stripname_result fi ;; *) wrapper=$file ;; esac if func_ltwrapper_script_p "$wrapper"; then notinst_deplibs= relink_command= func_source "$wrapper" # Check the variables that should have been set. test -z "$generated_by_libtool_version" && \ func_fatal_error "invalid libtool wrapper script '$wrapper'" finalize=: for lib in $notinst_deplibs; do # Check to see that each library is installed. libdir= if test -f "$lib"; then func_source "$lib" fi libfile=$libdir/`$ECHO "$lib" | $SED 's%^.*/%%g'` if test -n "$libdir" && test ! -f "$libfile"; then func_warning "'$lib' has not been installed in '$libdir'" finalize=false fi done relink_command= func_source "$wrapper" outputname= if test no = "$fast_install" && test -n "$relink_command"; then $opt_dry_run || { if $finalize; then tmpdir=`func_mktempdir` func_basename "$file$stripped_ext" file=$func_basename_result outputname=$tmpdir/$file # Replace the output file specification. relink_command=`$ECHO "$relink_command" | $SED 's%@OUTPUT@%'"$outputname"'%g'` $opt_quiet || { func_quote_for_expand "$relink_command" eval "func_echo $func_quote_for_expand_result" } if eval "$relink_command"; then : else func_error "error: relink '$file' with the above command before installing it" $opt_dry_run || ${RM}r "$tmpdir" continue fi file=$outputname else func_warning "cannot relink '$file'" fi } else # Install the binary that we compiled earlier. file=`$ECHO "$file$stripped_ext" | $SED "s%\([^/]*\)$%$objdir/\1%"` fi fi # remove .exe since cygwin /usr/bin/install will append another # one anyway case $install_prog,$host in */usr/bin/install*,*cygwin*) case $file:$destfile in *.exe:*.exe) # this is ok ;; *.exe:*) destfile=$destfile.exe ;; *:*.exe) func_stripname '' '.exe' "$destfile" destfile=$func_stripname_result ;; esac ;; esac func_show_eval "$install_prog\$stripme \$file \$destfile" 'exit $?' $opt_dry_run || if test -n "$outputname"; then ${RM}r "$tmpdir" fi ;; esac done for file in $staticlibs; do func_basename "$file" name=$func_basename_result # Set up the ranlib parameters. oldlib=$destdir/$name func_to_tool_file "$oldlib" func_convert_file_msys_to_w32 tool_oldlib=$func_to_tool_file_result func_show_eval "$install_prog \$file \$oldlib" 'exit $?' if test -n "$stripme" && test -n "$old_striplib"; then func_show_eval "$old_striplib $tool_oldlib" 'exit $?' fi # Do each command in the postinstall commands. func_execute_cmds "$old_postinstall_cmds" 'exit $?' done test -n "$future_libdirs" && \ func_warning "remember to run '$progname --finish$future_libdirs'" if test -n "$current_libdirs"; then # Maybe just do a dry run. $opt_dry_run && current_libdirs=" -n$current_libdirs" exec_cmd='$SHELL "$progpath" $preserve_args --finish$current_libdirs' else exit $EXIT_SUCCESS fi } test install = "$opt_mode" && func_mode_install ${1+"$@"} # func_generate_dlsyms outputname originator pic_p # Extract symbols from dlprefiles and create ${outputname}S.o with # a dlpreopen symbol table. func_generate_dlsyms () { $debug_cmd my_outputname=$1 my_originator=$2 my_pic_p=${3-false} my_prefix=`$ECHO "$my_originator" | $SED 's%[^a-zA-Z0-9]%_%g'` my_dlsyms= if test -n "$dlfiles$dlprefiles" || test no != "$dlself"; then if test -n "$NM" && test -n "$global_symbol_pipe"; then my_dlsyms=${my_outputname}S.c else func_error "not configured to extract global symbols from dlpreopened files" fi fi if test -n "$my_dlsyms"; then case $my_dlsyms in "") ;; *.c) # Discover the nlist of each of the dlfiles. nlist=$output_objdir/$my_outputname.nm func_show_eval "$RM $nlist ${nlist}S ${nlist}T" # Parse the name list into a source file. func_verbose "creating $output_objdir/$my_dlsyms" $opt_dry_run || $ECHO > "$output_objdir/$my_dlsyms" "\ /* $my_dlsyms - symbol resolution table for '$my_outputname' dlsym emulation. */ /* Generated by $PROGRAM (GNU $PACKAGE) $VERSION */ #ifdef __cplusplus extern \"C\" { #endif #if defined __GNUC__ && (((__GNUC__ == 4) && (__GNUC_MINOR__ >= 4)) || (__GNUC__ > 4)) #pragma GCC diagnostic ignored \"-Wstrict-prototypes\" #endif /* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and tests. */ #if defined _WIN32 || defined __CYGWIN__ || defined _WIN32_WCE /* DATA imports from DLLs on WIN32 can't be const, because runtime relocations are performed -- see ld's documentation on pseudo-relocs. */ # define LT_DLSYM_CONST #elif defined __osf__ /* This system does not cope well with relocations in const data. */ # define LT_DLSYM_CONST #else # define LT_DLSYM_CONST const #endif #define STREQ(s1, s2) (strcmp ((s1), (s2)) == 0) /* External symbol declarations for the compiler. */\ " if test yes = "$dlself"; then func_verbose "generating symbol list for '$output'" $opt_dry_run || echo ': @PROGRAM@ ' > "$nlist" # Add our own program objects to the symbol list. progfiles=`$ECHO "$objs$old_deplibs" | $SP2NL | $SED "$lo2o" | $NL2SP` for progfile in $progfiles; do func_to_tool_file "$progfile" func_convert_file_msys_to_w32 func_verbose "extracting global C symbols from '$func_to_tool_file_result'" $opt_dry_run || eval "$NM $func_to_tool_file_result | $global_symbol_pipe >> '$nlist'" done if test -n "$exclude_expsyms"; then $opt_dry_run || { eval '$EGREP -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T' eval '$MV "$nlist"T "$nlist"' } fi if test -n "$export_symbols_regex"; then $opt_dry_run || { eval '$EGREP -e "$export_symbols_regex" "$nlist" > "$nlist"T' eval '$MV "$nlist"T "$nlist"' } fi # Prepare the list of exported symbols if test -z "$export_symbols"; then export_symbols=$output_objdir/$outputname.exp $opt_dry_run || { $RM $export_symbols eval "$SED -n -e '/^: @PROGRAM@ $/d' -e 's/^.* \(.*\)$/\1/p' "'< "$nlist" > "$export_symbols"' case $host in *cygwin* | *mingw* | *cegcc* ) eval "echo EXPORTS "'> "$output_objdir/$outputname.def"' eval 'cat "$export_symbols" >> "$output_objdir/$outputname.def"' ;; esac } else $opt_dry_run || { eval "$SED -e 's/\([].[*^$]\)/\\\\\1/g' -e 's/^/ /' -e 's/$/$/'"' < "$export_symbols" > "$output_objdir/$outputname.exp"' eval '$GREP -f "$output_objdir/$outputname.exp" < "$nlist" > "$nlist"T' eval '$MV "$nlist"T "$nlist"' case $host in *cygwin* | *mingw* | *cegcc* ) eval "echo EXPORTS "'> "$output_objdir/$outputname.def"' eval 'cat "$nlist" >> "$output_objdir/$outputname.def"' ;; esac } fi fi for dlprefile in $dlprefiles; do func_verbose "extracting global C symbols from '$dlprefile'" func_basename "$dlprefile" name=$func_basename_result case $host in *cygwin* | *mingw* | *cegcc* ) # if an import library, we need to obtain dlname if func_win32_import_lib_p "$dlprefile"; then func_tr_sh "$dlprefile" eval "curr_lafile=\$libfile_$func_tr_sh_result" dlprefile_dlbasename= if test -n "$curr_lafile" && func_lalib_p "$curr_lafile"; then # Use subshell, to avoid clobbering current variable values dlprefile_dlname=`source "$curr_lafile" && echo "$dlname"` if test -n "$dlprefile_dlname"; then func_basename "$dlprefile_dlname" dlprefile_dlbasename=$func_basename_result else # no lafile. user explicitly requested -dlpreopen . $sharedlib_from_linklib_cmd "$dlprefile" dlprefile_dlbasename=$sharedlib_from_linklib_result fi fi $opt_dry_run || { if test -n "$dlprefile_dlbasename"; then eval '$ECHO ": $dlprefile_dlbasename" >> "$nlist"' else func_warning "Could not compute DLL name from $name" eval '$ECHO ": $name " >> "$nlist"' fi func_to_tool_file "$dlprefile" func_convert_file_msys_to_w32 eval "$NM \"$func_to_tool_file_result\" 2>/dev/null | $global_symbol_pipe | $SED -e '/I __imp/d' -e 's/I __nm_/D /;s/_nm__//' >> '$nlist'" } else # not an import lib $opt_dry_run || { eval '$ECHO ": $name " >> "$nlist"' func_to_tool_file "$dlprefile" func_convert_file_msys_to_w32 eval "$NM \"$func_to_tool_file_result\" 2>/dev/null | $global_symbol_pipe >> '$nlist'" } fi ;; *) $opt_dry_run || { eval '$ECHO ": $name " >> "$nlist"' func_to_tool_file "$dlprefile" func_convert_file_msys_to_w32 eval "$NM \"$func_to_tool_file_result\" 2>/dev/null | $global_symbol_pipe >> '$nlist'" } ;; esac done $opt_dry_run || { # Make sure we have at least an empty file. test -f "$nlist" || : > "$nlist" if test -n "$exclude_expsyms"; then $EGREP -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T $MV "$nlist"T "$nlist" fi # Try sorting and uniquifying the output. if $GREP -v "^: " < "$nlist" | if sort -k 3 /dev/null 2>&1; then sort -k 3 else sort +2 fi | uniq > "$nlist"S; then : else $GREP -v "^: " < "$nlist" > "$nlist"S fi if test -f "$nlist"S; then eval "$global_symbol_to_cdecl"' < "$nlist"S >> "$output_objdir/$my_dlsyms"' else echo '/* NONE */' >> "$output_objdir/$my_dlsyms" fi func_show_eval '$RM "${nlist}I"' if test -n "$global_symbol_to_import"; then eval "$global_symbol_to_import"' < "$nlist"S > "$nlist"I' fi echo >> "$output_objdir/$my_dlsyms" "\ /* The mapping between symbol names and symbols. */ typedef struct { const char *name; void *address; } lt_dlsymlist; extern LT_DLSYM_CONST lt_dlsymlist lt_${my_prefix}_LTX_preloaded_symbols[];\ " if test -s "$nlist"I; then echo >> "$output_objdir/$my_dlsyms" "\ static void lt_syminit(void) { LT_DLSYM_CONST lt_dlsymlist *symbol = lt_${my_prefix}_LTX_preloaded_symbols; for (; symbol->name; ++symbol) {" $SED 's/.*/ if (STREQ (symbol->name, \"&\")) symbol->address = (void *) \&&;/' < "$nlist"I >> "$output_objdir/$my_dlsyms" echo >> "$output_objdir/$my_dlsyms" "\ } }" fi echo >> "$output_objdir/$my_dlsyms" "\ LT_DLSYM_CONST lt_dlsymlist lt_${my_prefix}_LTX_preloaded_symbols[] = { {\"$my_originator\", (void *) 0}," if test -s "$nlist"I; then echo >> "$output_objdir/$my_dlsyms" "\ {\"@INIT@\", (void *) <_syminit}," fi case $need_lib_prefix in no) eval "$global_symbol_to_c_name_address" < "$nlist" >> "$output_objdir/$my_dlsyms" ;; *) eval "$global_symbol_to_c_name_address_lib_prefix" < "$nlist" >> "$output_objdir/$my_dlsyms" ;; esac echo >> "$output_objdir/$my_dlsyms" "\ {0, (void *) 0} }; /* This works around a problem in FreeBSD linker */ #ifdef FREEBSD_WORKAROUND static const void *lt_preloaded_setup() { return lt_${my_prefix}_LTX_preloaded_symbols; } #endif #ifdef __cplusplus } #endif\ " } # !$opt_dry_run pic_flag_for_symtable= case "$compile_command " in *" -static "*) ;; *) case $host in # compiling the symbol table file with pic_flag works around # a FreeBSD bug that causes programs to crash when -lm is # linked before any other PIC object. But we must not use # pic_flag when linking with -static. The problem exists in # FreeBSD 2.2.6 and is fixed in FreeBSD 3.1. *-*-freebsd2.*|*-*-freebsd3.0*|*-*-freebsdelf3.0*) pic_flag_for_symtable=" $pic_flag -DFREEBSD_WORKAROUND" ;; *-*-hpux*) pic_flag_for_symtable=" $pic_flag" ;; *) $my_pic_p && pic_flag_for_symtable=" $pic_flag" ;; esac ;; esac symtab_cflags= for arg in $LTCFLAGS; do case $arg in -pie | -fpie | -fPIE) ;; *) func_append symtab_cflags " $arg" ;; esac done # Now compile the dynamic symbol file. func_show_eval '(cd $output_objdir && $LTCC$symtab_cflags -c$no_builtin_flag$pic_flag_for_symtable "$my_dlsyms")' 'exit $?' # Clean up the generated files. func_show_eval '$RM "$output_objdir/$my_dlsyms" "$nlist" "${nlist}S" "${nlist}T" "${nlist}I"' # Transform the symbol file into the correct name. symfileobj=$output_objdir/${my_outputname}S.$objext case $host in *cygwin* | *mingw* | *cegcc* ) if test -f "$output_objdir/$my_outputname.def"; then compile_command=`$ECHO "$compile_command" | $SED "s%@SYMFILE@%$output_objdir/$my_outputname.def $symfileobj%"` finalize_command=`$ECHO "$finalize_command" | $SED "s%@SYMFILE@%$output_objdir/$my_outputname.def $symfileobj%"` else compile_command=`$ECHO "$compile_command" | $SED "s%@SYMFILE@%$symfileobj%"` finalize_command=`$ECHO "$finalize_command" | $SED "s%@SYMFILE@%$symfileobj%"` fi ;; *) compile_command=`$ECHO "$compile_command" | $SED "s%@SYMFILE@%$symfileobj%"` finalize_command=`$ECHO "$finalize_command" | $SED "s%@SYMFILE@%$symfileobj%"` ;; esac ;; *) func_fatal_error "unknown suffix for '$my_dlsyms'" ;; esac else # We keep going just in case the user didn't refer to # lt_preloaded_symbols. The linker will fail if global_symbol_pipe # really was required. # Nullify the symbol file. compile_command=`$ECHO "$compile_command" | $SED "s% @SYMFILE@%%"` finalize_command=`$ECHO "$finalize_command" | $SED "s% @SYMFILE@%%"` fi } # func_cygming_gnu_implib_p ARG # This predicate returns with zero status (TRUE) if # ARG is a GNU/binutils-style import library. Returns # with nonzero status (FALSE) otherwise. func_cygming_gnu_implib_p () { $debug_cmd func_to_tool_file "$1" func_convert_file_msys_to_w32 func_cygming_gnu_implib_tmp=`$NM "$func_to_tool_file_result" | eval "$global_symbol_pipe" | $EGREP ' (_head_[A-Za-z0-9_]+_[ad]l*|[A-Za-z0-9_]+_[ad]l*_iname)$'` test -n "$func_cygming_gnu_implib_tmp" } # func_cygming_ms_implib_p ARG # This predicate returns with zero status (TRUE) if # ARG is an MS-style import library. Returns # with nonzero status (FALSE) otherwise. func_cygming_ms_implib_p () { $debug_cmd func_to_tool_file "$1" func_convert_file_msys_to_w32 func_cygming_ms_implib_tmp=`$NM "$func_to_tool_file_result" | eval "$global_symbol_pipe" | $GREP '_NULL_IMPORT_DESCRIPTOR'` test -n "$func_cygming_ms_implib_tmp" } # func_win32_libid arg # return the library type of file 'arg' # # Need a lot of goo to handle *both* DLLs and import libs # Has to be a shell function in order to 'eat' the argument # that is supplied when $file_magic_command is called. # Despite the name, also deal with 64 bit binaries. func_win32_libid () { $debug_cmd win32_libid_type=unknown win32_fileres=`file -L $1 2>/dev/null` case $win32_fileres in *ar\ archive\ import\ library*) # definitely import win32_libid_type="x86 archive import" ;; *ar\ archive*) # could be an import, or static # Keep the egrep pattern in sync with the one in _LT_CHECK_MAGIC_METHOD. if eval $OBJDUMP -f $1 | $SED -e '10q' 2>/dev/null | $EGREP 'file format (pei*-i386(.*architecture: i386)?|pe-arm-wince|pe-x86-64)' >/dev/null; then case $nm_interface in "MS dumpbin") if func_cygming_ms_implib_p "$1" || func_cygming_gnu_implib_p "$1" then win32_nmres=import else win32_nmres= fi ;; *) func_to_tool_file "$1" func_convert_file_msys_to_w32 win32_nmres=`eval $NM -f posix -A \"$func_to_tool_file_result\" | $SED -n -e ' 1,100{ / I /{ s|.*|import| p q } }'` ;; esac case $win32_nmres in import*) win32_libid_type="x86 archive import";; *) win32_libid_type="x86 archive static";; esac fi ;; *DLL*) win32_libid_type="x86 DLL" ;; *executable*) # but shell scripts are "executable" too... case $win32_fileres in *MS\ Windows\ PE\ Intel*) win32_libid_type="x86 DLL" ;; esac ;; esac $ECHO "$win32_libid_type" } # func_cygming_dll_for_implib ARG # # Platform-specific function to extract the # name of the DLL associated with the specified # import library ARG. # Invoked by eval'ing the libtool variable # $sharedlib_from_linklib_cmd # Result is available in the variable # $sharedlib_from_linklib_result func_cygming_dll_for_implib () { $debug_cmd sharedlib_from_linklib_result=`$DLLTOOL --identify-strict --identify "$1"` } # func_cygming_dll_for_implib_fallback_core SECTION_NAME LIBNAMEs # # The is the core of a fallback implementation of a # platform-specific function to extract the name of the # DLL associated with the specified import library LIBNAME. # # SECTION_NAME is either .idata$6 or .idata$7, depending # on the platform and compiler that created the implib. # # Echos the name of the DLL associated with the # specified import library. func_cygming_dll_for_implib_fallback_core () { $debug_cmd match_literal=`$ECHO "$1" | $SED "$sed_make_literal_regex"` $OBJDUMP -s --section "$1" "$2" 2>/dev/null | $SED '/^Contents of section '"$match_literal"':/{ # Place marker at beginning of archive member dllname section s/.*/====MARK====/ p d } # These lines can sometimes be longer than 43 characters, but # are always uninteresting /:[ ]*file format pe[i]\{,1\}-/d /^In archive [^:]*:/d # Ensure marker is printed /^====MARK====/p # Remove all lines with less than 43 characters /^.\{43\}/!d # From remaining lines, remove first 43 characters s/^.\{43\}//' | $SED -n ' # Join marker and all lines until next marker into a single line /^====MARK====/ b para H $ b para b :para x s/\n//g # Remove the marker s/^====MARK====// # Remove trailing dots and whitespace s/[\. \t]*$// # Print /./p' | # we now have a list, one entry per line, of the stringified # contents of the appropriate section of all members of the # archive that possess that section. Heuristic: eliminate # all those that have a first or second character that is # a '.' (that is, objdump's representation of an unprintable # character.) This should work for all archives with less than # 0x302f exports -- but will fail for DLLs whose name actually # begins with a literal '.' or a single character followed by # a '.'. # # Of those that remain, print the first one. $SED -e '/^\./d;/^.\./d;q' } # func_cygming_dll_for_implib_fallback ARG # Platform-specific function to extract the # name of the DLL associated with the specified # import library ARG. # # This fallback implementation is for use when $DLLTOOL # does not support the --identify-strict option. # Invoked by eval'ing the libtool variable # $sharedlib_from_linklib_cmd # Result is available in the variable # $sharedlib_from_linklib_result func_cygming_dll_for_implib_fallback () { $debug_cmd if func_cygming_gnu_implib_p "$1"; then # binutils import library sharedlib_from_linklib_result=`func_cygming_dll_for_implib_fallback_core '.idata$7' "$1"` elif func_cygming_ms_implib_p "$1"; then # ms-generated import library sharedlib_from_linklib_result=`func_cygming_dll_for_implib_fallback_core '.idata$6' "$1"` else # unknown sharedlib_from_linklib_result= fi } # func_extract_an_archive dir oldlib func_extract_an_archive () { $debug_cmd f_ex_an_ar_dir=$1; shift f_ex_an_ar_oldlib=$1 if test yes = "$lock_old_archive_extraction"; then lockfile=$f_ex_an_ar_oldlib.lock until $opt_dry_run || ln "$progpath" "$lockfile" 2>/dev/null; do func_echo "Waiting for $lockfile to be removed" sleep 2 done fi func_show_eval "(cd \$f_ex_an_ar_dir && $AR x \"\$f_ex_an_ar_oldlib\")" \ 'stat=$?; rm -f "$lockfile"; exit $stat' if test yes = "$lock_old_archive_extraction"; then $opt_dry_run || rm -f "$lockfile" fi if ($AR t "$f_ex_an_ar_oldlib" | sort | sort -uc >/dev/null 2>&1); then : else func_fatal_error "object name conflicts in archive: $f_ex_an_ar_dir/$f_ex_an_ar_oldlib" fi } # func_extract_archives gentop oldlib ... func_extract_archives () { $debug_cmd my_gentop=$1; shift my_oldlibs=${1+"$@"} my_oldobjs= my_xlib= my_xabs= my_xdir= for my_xlib in $my_oldlibs; do # Extract the objects. case $my_xlib in [\\/]* | [A-Za-z]:[\\/]*) my_xabs=$my_xlib ;; *) my_xabs=`pwd`"/$my_xlib" ;; esac func_basename "$my_xlib" my_xlib=$func_basename_result my_xlib_u=$my_xlib while :; do case " $extracted_archives " in *" $my_xlib_u "*) func_arith $extracted_serial + 1 extracted_serial=$func_arith_result my_xlib_u=lt$extracted_serial-$my_xlib ;; *) break ;; esac done extracted_archives="$extracted_archives $my_xlib_u" my_xdir=$my_gentop/$my_xlib_u func_mkdir_p "$my_xdir" case $host in *-darwin*) func_verbose "Extracting $my_xabs" # Do not bother doing anything if just a dry run $opt_dry_run || { darwin_orig_dir=`pwd` cd $my_xdir || exit $? darwin_archive=$my_xabs darwin_curdir=`pwd` func_basename "$darwin_archive" darwin_base_archive=$func_basename_result darwin_arches=`$LIPO -info "$darwin_archive" 2>/dev/null | $GREP Architectures 2>/dev/null || true` if test -n "$darwin_arches"; then darwin_arches=`$ECHO "$darwin_arches" | $SED -e 's/.*are://'` darwin_arch= func_verbose "$darwin_base_archive has multiple architectures $darwin_arches" for darwin_arch in $darwin_arches; do func_mkdir_p "unfat-$$/$darwin_base_archive-$darwin_arch" $LIPO -thin $darwin_arch -output "unfat-$$/$darwin_base_archive-$darwin_arch/$darwin_base_archive" "$darwin_archive" cd "unfat-$$/$darwin_base_archive-$darwin_arch" func_extract_an_archive "`pwd`" "$darwin_base_archive" cd "$darwin_curdir" $RM "unfat-$$/$darwin_base_archive-$darwin_arch/$darwin_base_archive" done # $darwin_arches ## Okay now we've a bunch of thin objects, gotta fatten them up :) darwin_filelist=`find unfat-$$ -type f -name \*.o -print -o -name \*.lo -print | $SED -e "$sed_basename" | sort -u` darwin_file= darwin_files= for darwin_file in $darwin_filelist; do darwin_files=`find unfat-$$ -name $darwin_file -print | sort | $NL2SP` $LIPO -create -output "$darwin_file" $darwin_files done # $darwin_filelist $RM -rf unfat-$$ cd "$darwin_orig_dir" else cd $darwin_orig_dir func_extract_an_archive "$my_xdir" "$my_xabs" fi # $darwin_arches } # !$opt_dry_run ;; *) func_extract_an_archive "$my_xdir" "$my_xabs" ;; esac my_oldobjs="$my_oldobjs "`find $my_xdir -name \*.$objext -print -o -name \*.lo -print | sort | $NL2SP` done func_extract_archives_result=$my_oldobjs } # func_emit_wrapper [arg=no] # # Emit a libtool wrapper script on stdout. # Don't directly open a file because we may want to # incorporate the script contents within a cygwin/mingw # wrapper executable. Must ONLY be called from within # func_mode_link because it depends on a number of variables # set therein. # # ARG is the value that the WRAPPER_SCRIPT_BELONGS_IN_OBJDIR # variable will take. If 'yes', then the emitted script # will assume that the directory where it is stored is # the $objdir directory. This is a cygwin/mingw-specific # behavior. func_emit_wrapper () { func_emit_wrapper_arg1=${1-no} $ECHO "\ #! $SHELL # $output - temporary wrapper script for $objdir/$outputname # Generated by $PROGRAM (GNU $PACKAGE) $VERSION # # The $output program cannot be directly executed until all the libtool # libraries that it depends on are installed. # # This wrapper script should never be moved out of the build directory. # If it is, it will not operate correctly. # Sed substitution that helps us do robust quoting. It backslashifies # metacharacters that are still active within double-quoted strings. sed_quote_subst='$sed_quote_subst' # Be Bourne compatible if test -n \"\${ZSH_VERSION+set}\" && (emulate sh) >/dev/null 2>&1; then emulate sh NULLCMD=: # Zsh 3.x and 4.x performs word splitting on \${1+\"\$@\"}, which # is contrary to our usage. Disable this feature. alias -g '\${1+\"\$@\"}'='\"\$@\"' setopt NO_GLOB_SUBST else case \`(set -o) 2>/dev/null\` in *posix*) set -o posix;; esac fi BIN_SH=xpg4; export BIN_SH # for Tru64 DUALCASE=1; export DUALCASE # for MKS sh # The HP-UX ksh and POSIX shell print the target directory to stdout # if CDPATH is set. (unset CDPATH) >/dev/null 2>&1 && unset CDPATH relink_command=\"$relink_command\" # This environment variable determines our operation mode. if test \"\$libtool_install_magic\" = \"$magic\"; then # install mode needs the following variables: generated_by_libtool_version='$macro_version' notinst_deplibs='$notinst_deplibs' else # When we are sourced in execute mode, \$file and \$ECHO are already set. if test \"\$libtool_execute_magic\" != \"$magic\"; then file=\"\$0\"" qECHO=`$ECHO "$ECHO" | $SED "$sed_quote_subst"` $ECHO "\ # A function that is used when there is no print builtin or printf. func_fallback_echo () { eval 'cat <<_LTECHO_EOF \$1 _LTECHO_EOF' } ECHO=\"$qECHO\" fi # Very basic option parsing. These options are (a) specific to # the libtool wrapper, (b) are identical between the wrapper # /script/ and the wrapper /executable/ that is used only on # windows platforms, and (c) all begin with the string "--lt-" # (application programs are unlikely to have options that match # this pattern). # # There are only two supported options: --lt-debug and # --lt-dump-script. There is, deliberately, no --lt-help. # # The first argument to this parsing function should be the # script's $0 value, followed by "$@". lt_option_debug= func_parse_lt_options () { lt_script_arg0=\$0 shift for lt_opt do case \"\$lt_opt\" in --lt-debug) lt_option_debug=1 ;; --lt-dump-script) lt_dump_D=\`\$ECHO \"X\$lt_script_arg0\" | $SED -e 's/^X//' -e 's%/[^/]*$%%'\` test \"X\$lt_dump_D\" = \"X\$lt_script_arg0\" && lt_dump_D=. lt_dump_F=\`\$ECHO \"X\$lt_script_arg0\" | $SED -e 's/^X//' -e 's%^.*/%%'\` cat \"\$lt_dump_D/\$lt_dump_F\" exit 0 ;; --lt-*) \$ECHO \"Unrecognized --lt- option: '\$lt_opt'\" 1>&2 exit 1 ;; esac done # Print the debug banner immediately: if test -n \"\$lt_option_debug\"; then echo \"$outputname:$output:\$LINENO: libtool wrapper (GNU $PACKAGE) $VERSION\" 1>&2 fi } # Used when --lt-debug. Prints its arguments to stdout # (redirection is the responsibility of the caller) func_lt_dump_args () { lt_dump_args_N=1; for lt_arg do \$ECHO \"$outputname:$output:\$LINENO: newargv[\$lt_dump_args_N]: \$lt_arg\" lt_dump_args_N=\`expr \$lt_dump_args_N + 1\` done } # Core function for launching the target application func_exec_program_core () { " case $host in # Backslashes separate directories on plain windows *-*-mingw | *-*-os2* | *-cegcc*) $ECHO "\ if test -n \"\$lt_option_debug\"; then \$ECHO \"$outputname:$output:\$LINENO: newargv[0]: \$progdir\\\\\$program\" 1>&2 func_lt_dump_args \${1+\"\$@\"} 1>&2 fi exec \"\$progdir\\\\\$program\" \${1+\"\$@\"} " ;; *) $ECHO "\ if test -n \"\$lt_option_debug\"; then \$ECHO \"$outputname:$output:\$LINENO: newargv[0]: \$progdir/\$program\" 1>&2 func_lt_dump_args \${1+\"\$@\"} 1>&2 fi exec \"\$progdir/\$program\" \${1+\"\$@\"} " ;; esac $ECHO "\ \$ECHO \"\$0: cannot exec \$program \$*\" 1>&2 exit 1 } # A function to encapsulate launching the target application # Strips options in the --lt-* namespace from \$@ and # launches target application with the remaining arguments. func_exec_program () { case \" \$* \" in *\\ --lt-*) for lt_wr_arg do case \$lt_wr_arg in --lt-*) ;; *) set x \"\$@\" \"\$lt_wr_arg\"; shift;; esac shift done ;; esac func_exec_program_core \${1+\"\$@\"} } # Parse options func_parse_lt_options \"\$0\" \${1+\"\$@\"} # Find the directory that this script lives in. thisdir=\`\$ECHO \"\$file\" | $SED 's%/[^/]*$%%'\` test \"x\$thisdir\" = \"x\$file\" && thisdir=. # Follow symbolic links until we get to the real thisdir. file=\`ls -ld \"\$file\" | $SED -n 's/.*-> //p'\` while test -n \"\$file\"; do destdir=\`\$ECHO \"\$file\" | $SED 's%/[^/]*\$%%'\` # If there was a directory component, then change thisdir. if test \"x\$destdir\" != \"x\$file\"; then case \"\$destdir\" in [\\\\/]* | [A-Za-z]:[\\\\/]*) thisdir=\"\$destdir\" ;; *) thisdir=\"\$thisdir/\$destdir\" ;; esac fi file=\`\$ECHO \"\$file\" | $SED 's%^.*/%%'\` file=\`ls -ld \"\$thisdir/\$file\" | $SED -n 's/.*-> //p'\` done # Usually 'no', except on cygwin/mingw when embedded into # the cwrapper. WRAPPER_SCRIPT_BELONGS_IN_OBJDIR=$func_emit_wrapper_arg1 if test \"\$WRAPPER_SCRIPT_BELONGS_IN_OBJDIR\" = \"yes\"; then # special case for '.' if test \"\$thisdir\" = \".\"; then thisdir=\`pwd\` fi # remove .libs from thisdir case \"\$thisdir\" in *[\\\\/]$objdir ) thisdir=\`\$ECHO \"\$thisdir\" | $SED 's%[\\\\/][^\\\\/]*$%%'\` ;; $objdir ) thisdir=. ;; esac fi # Try to get the absolute directory name. absdir=\`cd \"\$thisdir\" && pwd\` test -n \"\$absdir\" && thisdir=\"\$absdir\" " if test yes = "$fast_install"; then $ECHO "\ program=lt-'$outputname'$exeext progdir=\"\$thisdir/$objdir\" if test ! -f \"\$progdir/\$program\" || { file=\`ls -1dt \"\$progdir/\$program\" \"\$progdir/../\$program\" 2>/dev/null | $SED 1q\`; \\ test \"X\$file\" != \"X\$progdir/\$program\"; }; then file=\"\$\$-\$program\" if test ! -d \"\$progdir\"; then $MKDIR \"\$progdir\" else $RM \"\$progdir/\$file\" fi" $ECHO "\ # relink executable if necessary if test -n \"\$relink_command\"; then if relink_command_output=\`eval \$relink_command 2>&1\`; then : else \$ECHO \"\$relink_command_output\" >&2 $RM \"\$progdir/\$file\" exit 1 fi fi $MV \"\$progdir/\$file\" \"\$progdir/\$program\" 2>/dev/null || { $RM \"\$progdir/\$program\"; $MV \"\$progdir/\$file\" \"\$progdir/\$program\"; } $RM \"\$progdir/\$file\" fi" else $ECHO "\ program='$outputname' progdir=\"\$thisdir/$objdir\" " fi $ECHO "\ if test -f \"\$progdir/\$program\"; then" # fixup the dll searchpath if we need to. # # Fix the DLL searchpath if we need to. Do this before prepending # to shlibpath, because on Windows, both are PATH and uninstalled # libraries must come first. if test -n "$dllsearchpath"; then $ECHO "\ # Add the dll search path components to the executable PATH PATH=$dllsearchpath:\$PATH " fi # Export our shlibpath_var if we have one. if test yes = "$shlibpath_overrides_runpath" && test -n "$shlibpath_var" && test -n "$temp_rpath"; then $ECHO "\ # Add our own library path to $shlibpath_var $shlibpath_var=\"$temp_rpath\$$shlibpath_var\" # Some systems cannot cope with colon-terminated $shlibpath_var # The second colon is a workaround for a bug in BeOS R4 sed $shlibpath_var=\`\$ECHO \"\$$shlibpath_var\" | $SED 's/::*\$//'\` export $shlibpath_var " fi $ECHO "\ if test \"\$libtool_execute_magic\" != \"$magic\"; then # Run the actual program with our arguments. func_exec_program \${1+\"\$@\"} fi else # The program doesn't exist. \$ECHO \"\$0: error: '\$progdir/\$program' does not exist\" 1>&2 \$ECHO \"This script is just a wrapper for \$program.\" 1>&2 \$ECHO \"See the $PACKAGE documentation for more information.\" 1>&2 exit 1 fi fi\ " } # func_emit_cwrapperexe_src # emit the source code for a wrapper executable on stdout # Must ONLY be called from within func_mode_link because # it depends on a number of variable set therein. func_emit_cwrapperexe_src () { cat < #include #ifdef _MSC_VER # include # include # include #else # include # include # ifdef __CYGWIN__ # include # endif #endif #include #include #include #include #include #include #include #include #define STREQ(s1, s2) (strcmp ((s1), (s2)) == 0) /* declarations of non-ANSI functions */ #if defined __MINGW32__ # ifdef __STRICT_ANSI__ int _putenv (const char *); # endif #elif defined __CYGWIN__ # ifdef __STRICT_ANSI__ char *realpath (const char *, char *); int putenv (char *); int setenv (const char *, const char *, int); # endif /* #elif defined other_platform || defined ... */ #endif /* portability defines, excluding path handling macros */ #if defined _MSC_VER # define setmode _setmode # define stat _stat # define chmod _chmod # define getcwd _getcwd # define putenv _putenv # define S_IXUSR _S_IEXEC #elif defined __MINGW32__ # define setmode _setmode # define stat _stat # define chmod _chmod # define getcwd _getcwd # define putenv _putenv #elif defined __CYGWIN__ # define HAVE_SETENV # define FOPEN_WB "wb" /* #elif defined other platforms ... */ #endif #if defined PATH_MAX # define LT_PATHMAX PATH_MAX #elif defined MAXPATHLEN # define LT_PATHMAX MAXPATHLEN #else # define LT_PATHMAX 1024 #endif #ifndef S_IXOTH # define S_IXOTH 0 #endif #ifndef S_IXGRP # define S_IXGRP 0 #endif /* path handling portability macros */ #ifndef DIR_SEPARATOR # define DIR_SEPARATOR '/' # define PATH_SEPARATOR ':' #endif #if defined _WIN32 || defined __MSDOS__ || defined __DJGPP__ || \ defined __OS2__ # define HAVE_DOS_BASED_FILE_SYSTEM # define FOPEN_WB "wb" # ifndef DIR_SEPARATOR_2 # define DIR_SEPARATOR_2 '\\' # endif # ifndef PATH_SEPARATOR_2 # define PATH_SEPARATOR_2 ';' # endif #endif #ifndef DIR_SEPARATOR_2 # define IS_DIR_SEPARATOR(ch) ((ch) == DIR_SEPARATOR) #else /* DIR_SEPARATOR_2 */ # define IS_DIR_SEPARATOR(ch) \ (((ch) == DIR_SEPARATOR) || ((ch) == DIR_SEPARATOR_2)) #endif /* DIR_SEPARATOR_2 */ #ifndef PATH_SEPARATOR_2 # define IS_PATH_SEPARATOR(ch) ((ch) == PATH_SEPARATOR) #else /* PATH_SEPARATOR_2 */ # define IS_PATH_SEPARATOR(ch) ((ch) == PATH_SEPARATOR_2) #endif /* PATH_SEPARATOR_2 */ #ifndef FOPEN_WB # define FOPEN_WB "w" #endif #ifndef _O_BINARY # define _O_BINARY 0 #endif #define XMALLOC(type, num) ((type *) xmalloc ((num) * sizeof(type))) #define XFREE(stale) do { \ if (stale) { free (stale); stale = 0; } \ } while (0) #if defined LT_DEBUGWRAPPER static int lt_debug = 1; #else static int lt_debug = 0; #endif const char *program_name = "libtool-wrapper"; /* in case xstrdup fails */ void *xmalloc (size_t num); char *xstrdup (const char *string); const char *base_name (const char *name); char *find_executable (const char *wrapper); char *chase_symlinks (const char *pathspec); int make_executable (const char *path); int check_executable (const char *path); char *strendzap (char *str, const char *pat); void lt_debugprintf (const char *file, int line, const char *fmt, ...); void lt_fatal (const char *file, int line, const char *message, ...); static const char *nonnull (const char *s); static const char *nonempty (const char *s); void lt_setenv (const char *name, const char *value); char *lt_extend_str (const char *orig_value, const char *add, int to_end); void lt_update_exe_path (const char *name, const char *value); void lt_update_lib_path (const char *name, const char *value); char **prepare_spawn (char **argv); void lt_dump_script (FILE *f); EOF cat <= 0) && (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))) return 1; else return 0; } int make_executable (const char *path) { int rval = 0; struct stat st; lt_debugprintf (__FILE__, __LINE__, "(make_executable): %s\n", nonempty (path)); if ((!path) || (!*path)) return 0; if (stat (path, &st) >= 0) { rval = chmod (path, st.st_mode | S_IXOTH | S_IXGRP | S_IXUSR); } return rval; } /* Searches for the full path of the wrapper. Returns newly allocated full path name if found, NULL otherwise Does not chase symlinks, even on platforms that support them. */ char * find_executable (const char *wrapper) { int has_slash = 0; const char *p; const char *p_next; /* static buffer for getcwd */ char tmp[LT_PATHMAX + 1]; size_t tmp_len; char *concat_name; lt_debugprintf (__FILE__, __LINE__, "(find_executable): %s\n", nonempty (wrapper)); if ((wrapper == NULL) || (*wrapper == '\0')) return NULL; /* Absolute path? */ #if defined HAVE_DOS_BASED_FILE_SYSTEM if (isalpha ((unsigned char) wrapper[0]) && wrapper[1] == ':') { concat_name = xstrdup (wrapper); if (check_executable (concat_name)) return concat_name; XFREE (concat_name); } else { #endif if (IS_DIR_SEPARATOR (wrapper[0])) { concat_name = xstrdup (wrapper); if (check_executable (concat_name)) return concat_name; XFREE (concat_name); } #if defined HAVE_DOS_BASED_FILE_SYSTEM } #endif for (p = wrapper; *p; p++) if (*p == '/') { has_slash = 1; break; } if (!has_slash) { /* no slashes; search PATH */ const char *path = getenv ("PATH"); if (path != NULL) { for (p = path; *p; p = p_next) { const char *q; size_t p_len; for (q = p; *q; q++) if (IS_PATH_SEPARATOR (*q)) break; p_len = (size_t) (q - p); p_next = (*q == '\0' ? q : q + 1); if (p_len == 0) { /* empty path: current directory */ if (getcwd (tmp, LT_PATHMAX) == NULL) lt_fatal (__FILE__, __LINE__, "getcwd failed: %s", nonnull (strerror (errno))); tmp_len = strlen (tmp); concat_name = XMALLOC (char, tmp_len + 1 + strlen (wrapper) + 1); memcpy (concat_name, tmp, tmp_len); concat_name[tmp_len] = '/'; strcpy (concat_name + tmp_len + 1, wrapper); } else { concat_name = XMALLOC (char, p_len + 1 + strlen (wrapper) + 1); memcpy (concat_name, p, p_len); concat_name[p_len] = '/'; strcpy (concat_name + p_len + 1, wrapper); } if (check_executable (concat_name)) return concat_name; XFREE (concat_name); } } /* not found in PATH; assume curdir */ } /* Relative path | not found in path: prepend cwd */ if (getcwd (tmp, LT_PATHMAX) == NULL) lt_fatal (__FILE__, __LINE__, "getcwd failed: %s", nonnull (strerror (errno))); tmp_len = strlen (tmp); concat_name = XMALLOC (char, tmp_len + 1 + strlen (wrapper) + 1); memcpy (concat_name, tmp, tmp_len); concat_name[tmp_len] = '/'; strcpy (concat_name + tmp_len + 1, wrapper); if (check_executable (concat_name)) return concat_name; XFREE (concat_name); return NULL; } char * chase_symlinks (const char *pathspec) { #ifndef S_ISLNK return xstrdup (pathspec); #else char buf[LT_PATHMAX]; struct stat s; char *tmp_pathspec = xstrdup (pathspec); char *p; int has_symlinks = 0; while (strlen (tmp_pathspec) && !has_symlinks) { lt_debugprintf (__FILE__, __LINE__, "checking path component for symlinks: %s\n", tmp_pathspec); if (lstat (tmp_pathspec, &s) == 0) { if (S_ISLNK (s.st_mode) != 0) { has_symlinks = 1; break; } /* search backwards for last DIR_SEPARATOR */ p = tmp_pathspec + strlen (tmp_pathspec) - 1; while ((p > tmp_pathspec) && (!IS_DIR_SEPARATOR (*p))) p--; if ((p == tmp_pathspec) && (!IS_DIR_SEPARATOR (*p))) { /* no more DIR_SEPARATORS left */ break; } *p = '\0'; } else { lt_fatal (__FILE__, __LINE__, "error accessing file \"%s\": %s", tmp_pathspec, nonnull (strerror (errno))); } } XFREE (tmp_pathspec); if (!has_symlinks) { return xstrdup (pathspec); } tmp_pathspec = realpath (pathspec, buf); if (tmp_pathspec == 0) { lt_fatal (__FILE__, __LINE__, "could not follow symlinks for %s", pathspec); } return xstrdup (tmp_pathspec); #endif } char * strendzap (char *str, const char *pat) { size_t len, patlen; assert (str != NULL); assert (pat != NULL); len = strlen (str); patlen = strlen (pat); if (patlen <= len) { str += len - patlen; if (STREQ (str, pat)) *str = '\0'; } return str; } void lt_debugprintf (const char *file, int line, const char *fmt, ...) { va_list args; if (lt_debug) { (void) fprintf (stderr, "%s:%s:%d: ", program_name, file, line); va_start (args, fmt); (void) vfprintf (stderr, fmt, args); va_end (args); } } static void lt_error_core (int exit_status, const char *file, int line, const char *mode, const char *message, va_list ap) { fprintf (stderr, "%s:%s:%d: %s: ", program_name, file, line, mode); vfprintf (stderr, message, ap); fprintf (stderr, ".\n"); if (exit_status >= 0) exit (exit_status); } void lt_fatal (const char *file, int line, const char *message, ...) { va_list ap; va_start (ap, message); lt_error_core (EXIT_FAILURE, file, line, "FATAL", message, ap); va_end (ap); } static const char * nonnull (const char *s) { return s ? s : "(null)"; } static const char * nonempty (const char *s) { return (s && !*s) ? "(empty)" : nonnull (s); } void lt_setenv (const char *name, const char *value) { lt_debugprintf (__FILE__, __LINE__, "(lt_setenv) setting '%s' to '%s'\n", nonnull (name), nonnull (value)); { #ifdef HAVE_SETENV /* always make a copy, for consistency with !HAVE_SETENV */ char *str = xstrdup (value); setenv (name, str, 1); #else size_t len = strlen (name) + 1 + strlen (value) + 1; char *str = XMALLOC (char, len); sprintf (str, "%s=%s", name, value); if (putenv (str) != EXIT_SUCCESS) { XFREE (str); } #endif } } char * lt_extend_str (const char *orig_value, const char *add, int to_end) { char *new_value; if (orig_value && *orig_value) { size_t orig_value_len = strlen (orig_value); size_t add_len = strlen (add); new_value = XMALLOC (char, add_len + orig_value_len + 1); if (to_end) { strcpy (new_value, orig_value); strcpy (new_value + orig_value_len, add); } else { strcpy (new_value, add); strcpy (new_value + add_len, orig_value); } } else { new_value = xstrdup (add); } return new_value; } void lt_update_exe_path (const char *name, const char *value) { lt_debugprintf (__FILE__, __LINE__, "(lt_update_exe_path) modifying '%s' by prepending '%s'\n", nonnull (name), nonnull (value)); if (name && *name && value && *value) { char *new_value = lt_extend_str (getenv (name), value, 0); /* some systems can't cope with a ':'-terminated path #' */ size_t len = strlen (new_value); while ((len > 0) && IS_PATH_SEPARATOR (new_value[len-1])) { new_value[--len] = '\0'; } lt_setenv (name, new_value); XFREE (new_value); } } void lt_update_lib_path (const char *name, const char *value) { lt_debugprintf (__FILE__, __LINE__, "(lt_update_lib_path) modifying '%s' by prepending '%s'\n", nonnull (name), nonnull (value)); if (name && *name && value && *value) { char *new_value = lt_extend_str (getenv (name), value, 0); lt_setenv (name, new_value); XFREE (new_value); } } EOF case $host_os in mingw*) cat <<"EOF" /* Prepares an argument vector before calling spawn(). Note that spawn() does not by itself call the command interpreter (getenv ("COMSPEC") != NULL ? getenv ("COMSPEC") : ({ OSVERSIONINFO v; v.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); GetVersionEx(&v); v.dwPlatformId == VER_PLATFORM_WIN32_NT; }) ? "cmd.exe" : "command.com"). Instead it simply concatenates the arguments, separated by ' ', and calls CreateProcess(). We must quote the arguments since Win32 CreateProcess() interprets characters like ' ', '\t', '\\', '"' (but not '<' and '>') in a special way: - Space and tab are interpreted as delimiters. They are not treated as delimiters if they are surrounded by double quotes: "...". - Unescaped double quotes are removed from the input. Their only effect is that within double quotes, space and tab are treated like normal characters. - Backslashes not followed by double quotes are not special. - But 2*n+1 backslashes followed by a double quote become n backslashes followed by a double quote (n >= 0): \" -> " \\\" -> \" \\\\\" -> \\" */ #define SHELL_SPECIAL_CHARS "\"\\ \001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037" #define SHELL_SPACE_CHARS " \001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037" char ** prepare_spawn (char **argv) { size_t argc; char **new_argv; size_t i; /* Count number of arguments. */ for (argc = 0; argv[argc] != NULL; argc++) ; /* Allocate new argument vector. */ new_argv = XMALLOC (char *, argc + 1); /* Put quoted arguments into the new argument vector. */ for (i = 0; i < argc; i++) { const char *string = argv[i]; if (string[0] == '\0') new_argv[i] = xstrdup ("\"\""); else if (strpbrk (string, SHELL_SPECIAL_CHARS) != NULL) { int quote_around = (strpbrk (string, SHELL_SPACE_CHARS) != NULL); size_t length; unsigned int backslashes; const char *s; char *quoted_string; char *p; length = 0; backslashes = 0; if (quote_around) length++; for (s = string; *s != '\0'; s++) { char c = *s; if (c == '"') length += backslashes + 1; length++; if (c == '\\') backslashes++; else backslashes = 0; } if (quote_around) length += backslashes + 1; quoted_string = XMALLOC (char, length + 1); p = quoted_string; backslashes = 0; if (quote_around) *p++ = '"'; for (s = string; *s != '\0'; s++) { char c = *s; if (c == '"') { unsigned int j; for (j = backslashes + 1; j > 0; j--) *p++ = '\\'; } *p++ = c; if (c == '\\') backslashes++; else backslashes = 0; } if (quote_around) { unsigned int j; for (j = backslashes; j > 0; j--) *p++ = '\\'; *p++ = '"'; } *p = '\0'; new_argv[i] = quoted_string; } else new_argv[i] = (char *) string; } new_argv[argc] = NULL; return new_argv; } EOF ;; esac cat <<"EOF" void lt_dump_script (FILE* f) { EOF func_emit_wrapper yes | $SED -n -e ' s/^\(.\{79\}\)\(..*\)/\1\ \2/ h s/\([\\"]\)/\\\1/g s/$/\\n/ s/\([^\n]*\).*/ fputs ("\1", f);/p g D' cat <<"EOF" } EOF } # end: func_emit_cwrapperexe_src # func_win32_import_lib_p ARG # True if ARG is an import lib, as indicated by $file_magic_cmd func_win32_import_lib_p () { $debug_cmd case `eval $file_magic_cmd \"\$1\" 2>/dev/null | $SED -e 10q` in *import*) : ;; *) false ;; esac } # func_suncc_cstd_abi # !!ONLY CALL THIS FOR SUN CC AFTER $compile_command IS FULLY EXPANDED!! # Several compiler flags select an ABI that is incompatible with the # Cstd library. Avoid specifying it if any are in CXXFLAGS. func_suncc_cstd_abi () { $debug_cmd case " $compile_command " in *" -compat=g "*|*\ -std=c++[0-9][0-9]\ *|*" -library=stdcxx4 "*|*" -library=stlport4 "*) suncc_use_cstd_abi=no ;; *) suncc_use_cstd_abi=yes ;; esac } # func_mode_link arg... func_mode_link () { $debug_cmd case $host in *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*) # It is impossible to link a dll without this setting, and # we shouldn't force the makefile maintainer to figure out # what system we are compiling for in order to pass an extra # flag for every libtool invocation. # allow_undefined=no # FIXME: Unfortunately, there are problems with the above when trying # to make a dll that has undefined symbols, in which case not # even a static library is built. For now, we need to specify # -no-undefined on the libtool link line when we can be certain # that all symbols are satisfied, otherwise we get a static library. allow_undefined=yes ;; *) allow_undefined=yes ;; esac libtool_args=$nonopt base_compile="$nonopt $@" compile_command=$nonopt finalize_command=$nonopt compile_rpath= finalize_rpath= compile_shlibpath= finalize_shlibpath= convenience= old_convenience= deplibs= old_deplibs= compiler_flags= linker_flags= dllsearchpath= lib_search_path=`pwd` inst_prefix_dir= new_inherited_linker_flags= avoid_version=no bindir= dlfiles= dlprefiles= dlself=no export_dynamic=no export_symbols= export_symbols_regex= generated= libobjs= ltlibs= module=no no_install=no objs= os2dllname= non_pic_objects= precious_files_regex= prefer_static_libs=no preload=false prev= prevarg= release= rpath= xrpath= perm_rpath= temp_rpath= thread_safe=no vinfo= vinfo_number=no weak_libs= single_module=$wl-single_module func_infer_tag $base_compile # We need to know -static, to get the right output filenames. for arg do case $arg in -shared) test yes != "$build_libtool_libs" \ && func_fatal_configuration "cannot build a shared library" build_old_libs=no break ;; -all-static | -static | -static-libtool-libs) case $arg in -all-static) if test yes = "$build_libtool_libs" && test -z "$link_static_flag"; then func_warning "complete static linking is impossible in this configuration" fi if test -n "$link_static_flag"; then dlopen_self=$dlopen_self_static fi prefer_static_libs=yes ;; -static) if test -z "$pic_flag" && test -n "$link_static_flag"; then dlopen_self=$dlopen_self_static fi prefer_static_libs=built ;; -static-libtool-libs) if test -z "$pic_flag" && test -n "$link_static_flag"; then dlopen_self=$dlopen_self_static fi prefer_static_libs=yes ;; esac build_libtool_libs=no build_old_libs=yes break ;; esac done # See if our shared archives depend on static archives. test -n "$old_archive_from_new_cmds" && build_old_libs=yes # Go through the arguments, transforming them on the way. while test "$#" -gt 0; do arg=$1 shift func_quote_for_eval "$arg" qarg=$func_quote_for_eval_unquoted_result func_append libtool_args " $func_quote_for_eval_result" # If the previous option needs an argument, assign it. if test -n "$prev"; then case $prev in output) func_append compile_command " @OUTPUT@" func_append finalize_command " @OUTPUT@" ;; esac case $prev in bindir) bindir=$arg prev= continue ;; dlfiles|dlprefiles) $preload || { # Add the symbol object into the linking commands. func_append compile_command " @SYMFILE@" func_append finalize_command " @SYMFILE@" preload=: } case $arg in *.la | *.lo) ;; # We handle these cases below. force) if test no = "$dlself"; then dlself=needless export_dynamic=yes fi prev= continue ;; self) if test dlprefiles = "$prev"; then dlself=yes elif test dlfiles = "$prev" && test yes != "$dlopen_self"; then dlself=yes else dlself=needless export_dynamic=yes fi prev= continue ;; *) if test dlfiles = "$prev"; then func_append dlfiles " $arg" else func_append dlprefiles " $arg" fi prev= continue ;; esac ;; expsyms) export_symbols=$arg test -f "$arg" \ || func_fatal_error "symbol file '$arg' does not exist" prev= continue ;; expsyms_regex) export_symbols_regex=$arg prev= continue ;; framework) case $host in *-*-darwin*) case "$deplibs " in *" $qarg.ltframework "*) ;; *) func_append deplibs " $qarg.ltframework" # this is fixed later ;; esac ;; esac prev= continue ;; inst_prefix) inst_prefix_dir=$arg prev= continue ;; mllvm) # Clang does not use LLVM to link, so we can simply discard any # '-mllvm $arg' options when doing the link step. prev= continue ;; objectlist) if test -f "$arg"; then save_arg=$arg moreargs= for fil in `cat "$save_arg"` do # func_append moreargs " $fil" arg=$fil # A libtool-controlled object. # Check to see that this really is a libtool object. if func_lalib_unsafe_p "$arg"; then pic_object= non_pic_object= # Read the .lo file func_source "$arg" if test -z "$pic_object" || test -z "$non_pic_object" || test none = "$pic_object" && test none = "$non_pic_object"; then func_fatal_error "cannot find name of object for '$arg'" fi # Extract subdirectory from the argument. func_dirname "$arg" "/" "" xdir=$func_dirname_result if test none != "$pic_object"; then # Prepend the subdirectory the object is found in. pic_object=$xdir$pic_object if test dlfiles = "$prev"; then if test yes = "$build_libtool_libs" && test yes = "$dlopen_support"; then func_append dlfiles " $pic_object" prev= continue else # If libtool objects are unsupported, then we need to preload. prev=dlprefiles fi fi # CHECK ME: I think I busted this. -Ossama if test dlprefiles = "$prev"; then # Preload the old-style object. func_append dlprefiles " $pic_object" prev= fi # A PIC object. func_append libobjs " $pic_object" arg=$pic_object fi # Non-PIC object. if test none != "$non_pic_object"; then # Prepend the subdirectory the object is found in. non_pic_object=$xdir$non_pic_object # A standard non-PIC object func_append non_pic_objects " $non_pic_object" if test -z "$pic_object" || test none = "$pic_object"; then arg=$non_pic_object fi else # If the PIC object exists, use it instead. # $xdir was prepended to $pic_object above. non_pic_object=$pic_object func_append non_pic_objects " $non_pic_object" fi else # Only an error if not doing a dry-run. if $opt_dry_run; then # Extract subdirectory from the argument. func_dirname "$arg" "/" "" xdir=$func_dirname_result func_lo2o "$arg" pic_object=$xdir$objdir/$func_lo2o_result non_pic_object=$xdir$func_lo2o_result func_append libobjs " $pic_object" func_append non_pic_objects " $non_pic_object" else func_fatal_error "'$arg' is not a valid libtool object" fi fi done else func_fatal_error "link input file '$arg' does not exist" fi arg=$save_arg prev= continue ;; os2dllname) os2dllname=$arg prev= continue ;; precious_regex) precious_files_regex=$arg prev= continue ;; release) release=-$arg prev= continue ;; rpath | xrpath) # We need an absolute path. case $arg in [\\/]* | [A-Za-z]:[\\/]*) ;; *) func_fatal_error "only absolute run-paths are allowed" ;; esac if test rpath = "$prev"; then case "$rpath " in *" $arg "*) ;; *) func_append rpath " $arg" ;; esac else case "$xrpath " in *" $arg "*) ;; *) func_append xrpath " $arg" ;; esac fi prev= continue ;; shrext) shrext_cmds=$arg prev= continue ;; weak) func_append weak_libs " $arg" prev= continue ;; xcclinker) func_append linker_flags " $qarg" func_append compiler_flags " $qarg" prev= func_append compile_command " $qarg" func_append finalize_command " $qarg" continue ;; xcompiler) func_append compiler_flags " $qarg" prev= func_append compile_command " $qarg" func_append finalize_command " $qarg" continue ;; xlinker) func_append linker_flags " $qarg" func_append compiler_flags " $wl$qarg" prev= func_append compile_command " $wl$qarg" func_append finalize_command " $wl$qarg" continue ;; *) eval "$prev=\"\$arg\"" prev= continue ;; esac fi # test -n "$prev" prevarg=$arg case $arg in -all-static) if test -n "$link_static_flag"; then # See comment for -static flag below, for more details. func_append compile_command " $link_static_flag" func_append finalize_command " $link_static_flag" fi continue ;; -allow-undefined) # FIXME: remove this flag sometime in the future. func_fatal_error "'-allow-undefined' must not be used because it is the default" ;; -avoid-version) avoid_version=yes continue ;; -bindir) prev=bindir continue ;; -dlopen) prev=dlfiles continue ;; -dlpreopen) prev=dlprefiles continue ;; -export-dynamic) export_dynamic=yes continue ;; -export-symbols | -export-symbols-regex) if test -n "$export_symbols" || test -n "$export_symbols_regex"; then func_fatal_error "more than one -exported-symbols argument is not allowed" fi if test X-export-symbols = "X$arg"; then prev=expsyms else prev=expsyms_regex fi continue ;; -framework) prev=framework continue ;; -inst-prefix-dir) prev=inst_prefix continue ;; # The native IRIX linker understands -LANG:*, -LIST:* and -LNO:* # so, if we see these flags be careful not to treat them like -L -L[A-Z][A-Z]*:*) case $with_gcc/$host in no/*-*-irix* | /*-*-irix*) func_append compile_command " $arg" func_append finalize_command " $arg" ;; esac continue ;; -L*) func_stripname "-L" '' "$arg" if test -z "$func_stripname_result"; then if test "$#" -gt 0; then func_fatal_error "require no space between '-L' and '$1'" else func_fatal_error "need path for '-L' option" fi fi func_resolve_sysroot "$func_stripname_result" dir=$func_resolve_sysroot_result # We need an absolute path. case $dir in [\\/]* | [A-Za-z]:[\\/]*) ;; *) absdir=`cd "$dir" && pwd` test -z "$absdir" && \ func_fatal_error "cannot determine absolute directory name of '$dir'" dir=$absdir ;; esac case "$deplibs " in *" -L$dir "* | *" $arg "*) # Will only happen for absolute or sysroot arguments ;; *) # Preserve sysroot, but never include relative directories case $dir in [\\/]* | [A-Za-z]:[\\/]* | =*) func_append deplibs " $arg" ;; *) func_append deplibs " -L$dir" ;; esac func_append lib_search_path " $dir" ;; esac case $host in *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*) testbindir=`$ECHO "$dir" | $SED 's*/lib$*/bin*'` case :$dllsearchpath: in *":$dir:"*) ;; ::) dllsearchpath=$dir;; *) func_append dllsearchpath ":$dir";; esac case :$dllsearchpath: in *":$testbindir:"*) ;; ::) dllsearchpath=$testbindir;; *) func_append dllsearchpath ":$testbindir";; esac ;; esac continue ;; -l*) if test X-lc = "X$arg" || test X-lm = "X$arg"; then case $host in *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-beos* | *-cegcc* | *-*-haiku*) # These systems don't actually have a C or math library (as such) continue ;; *-*-os2*) # These systems don't actually have a C library (as such) test X-lc = "X$arg" && continue ;; *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* | *-*-bitrig*) # Do not include libc due to us having libc/libc_r. test X-lc = "X$arg" && continue ;; *-*-rhapsody* | *-*-darwin1.[012]) # Rhapsody C and math libraries are in the System framework func_append deplibs " System.ltframework" continue ;; *-*-sco3.2v5* | *-*-sco5v6*) # Causes problems with __ctype test X-lc = "X$arg" && continue ;; *-*-sysv4.2uw2* | *-*-sysv5* | *-*-unixware* | *-*-OpenUNIX*) # Compiler inserts libc in the correct place for threads to work test X-lc = "X$arg" && continue ;; esac elif test X-lc_r = "X$arg"; then case $host in *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* | *-*-bitrig*) # Do not include libc_r directly, use -pthread flag. continue ;; esac fi func_append deplibs " $arg" continue ;; -mllvm) prev=mllvm continue ;; -module) module=yes continue ;; # Tru64 UNIX uses -model [arg] to determine the layout of C++ # classes, name mangling, and exception handling. # Darwin uses the -arch flag to determine output architecture. -model|-arch|-isysroot|--sysroot) func_append compiler_flags " $arg" func_append compile_command " $arg" func_append finalize_command " $arg" prev=xcompiler continue ;; -mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe \ |-threads|-fopenmp|-openmp|-mp|-xopenmp|-omp|-qsmp=*) func_append compiler_flags " $arg" func_append compile_command " $arg" func_append finalize_command " $arg" case "$new_inherited_linker_flags " in *" $arg "*) ;; * ) func_append new_inherited_linker_flags " $arg" ;; esac continue ;; -multi_module) single_module=$wl-multi_module continue ;; -no-fast-install) fast_install=no continue ;; -no-install) case $host in *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-*-darwin* | *-cegcc*) # The PATH hackery in wrapper scripts is required on Windows # and Darwin in order for the loader to find any dlls it needs. func_warning "'-no-install' is ignored for $host" func_warning "assuming '-no-fast-install' instead" fast_install=no ;; *) no_install=yes ;; esac continue ;; -no-undefined) allow_undefined=no continue ;; -objectlist) prev=objectlist continue ;; -os2dllname) prev=os2dllname continue ;; -o) prev=output ;; -precious-files-regex) prev=precious_regex continue ;; -release) prev=release continue ;; -rpath) prev=rpath continue ;; -R) prev=xrpath continue ;; -R*) func_stripname '-R' '' "$arg" dir=$func_stripname_result # We need an absolute path. case $dir in [\\/]* | [A-Za-z]:[\\/]*) ;; =*) func_stripname '=' '' "$dir" dir=$lt_sysroot$func_stripname_result ;; *) func_fatal_error "only absolute run-paths are allowed" ;; esac case "$xrpath " in *" $dir "*) ;; *) func_append xrpath " $dir" ;; esac continue ;; -shared) # The effects of -shared are defined in a previous loop. continue ;; -shrext) prev=shrext continue ;; -static | -static-libtool-libs) # The effects of -static are defined in a previous loop. # We used to do the same as -all-static on platforms that # didn't have a PIC flag, but the assumption that the effects # would be equivalent was wrong. It would break on at least # Digital Unix and AIX. continue ;; -thread-safe) thread_safe=yes continue ;; -version-info) prev=vinfo continue ;; -version-number) prev=vinfo vinfo_number=yes continue ;; -weak) prev=weak continue ;; -Wc,*) func_stripname '-Wc,' '' "$arg" args=$func_stripname_result arg= save_ifs=$IFS; IFS=, for flag in $args; do IFS=$save_ifs func_quote_for_eval "$flag" func_append arg " $func_quote_for_eval_result" func_append compiler_flags " $func_quote_for_eval_result" done IFS=$save_ifs func_stripname ' ' '' "$arg" arg=$func_stripname_result ;; -Wl,*) func_stripname '-Wl,' '' "$arg" args=$func_stripname_result arg= save_ifs=$IFS; IFS=, for flag in $args; do IFS=$save_ifs func_quote_for_eval "$flag" func_append arg " $wl$func_quote_for_eval_result" func_append compiler_flags " $wl$func_quote_for_eval_result" func_append linker_flags " $func_quote_for_eval_result" done IFS=$save_ifs func_stripname ' ' '' "$arg" arg=$func_stripname_result ;; -Xcompiler) prev=xcompiler continue ;; -Xlinker) prev=xlinker continue ;; -XCClinker) prev=xcclinker continue ;; # -msg_* for osf cc -msg_*) func_quote_for_eval "$arg" arg=$func_quote_for_eval_result ;; # Flags to be passed through unchanged, with rationale: # -64, -mips[0-9] enable 64-bit mode for the SGI compiler # -r[0-9][0-9]* specify processor for the SGI compiler # -xarch=*, -xtarget=* enable 64-bit mode for the Sun compiler # +DA*, +DD* enable 64-bit mode for the HP compiler # -q* compiler args for the IBM compiler # -m*, -t[45]*, -txscale* architecture-specific flags for GCC # -F/path path to uninstalled frameworks, gcc on darwin # -p, -pg, --coverage, -fprofile-* profiling flags for GCC # -fstack-protector* stack protector flags for GCC # @file GCC response files # -tp=* Portland pgcc target processor selection # --sysroot=* for sysroot support # -O*, -g*, -flto*, -fwhopr*, -fuse-linker-plugin GCC link-time optimization # -specs=* GCC specs files # -stdlib=* select c++ std lib with clang # -fsanitize=* Clang/GCC memory and address sanitizer # -fuse-ld=* Linker select flags for GCC -64|-mips[0-9]|-r[0-9][0-9]*|-xarch=*|-xtarget=*|+DA*|+DD*|-q*|-m*| \ -t[45]*|-txscale*|-p|-pg|--coverage|-fprofile-*|-F*|@*|-tp=*|--sysroot=*| \ -O*|-g*|-flto*|-fwhopr*|-fuse-linker-plugin|-fstack-protector*|-stdlib=*| \ -specs=*|-fsanitize=*|-fuse-ld=*) func_quote_for_eval "$arg" arg=$func_quote_for_eval_result func_append compile_command " $arg" func_append finalize_command " $arg" func_append compiler_flags " $arg" continue ;; -Z*) if test os2 = "`expr $host : '.*\(os2\)'`"; then # OS/2 uses -Zxxx to specify OS/2-specific options compiler_flags="$compiler_flags $arg" func_append compile_command " $arg" func_append finalize_command " $arg" case $arg in -Zlinker | -Zstack) prev=xcompiler ;; esac continue else # Otherwise treat like 'Some other compiler flag' below func_quote_for_eval "$arg" arg=$func_quote_for_eval_result fi ;; # Some other compiler flag. -* | +*) func_quote_for_eval "$arg" arg=$func_quote_for_eval_result ;; *.$objext) # A standard object. func_append objs " $arg" ;; *.lo) # A libtool-controlled object. # Check to see that this really is a libtool object. if func_lalib_unsafe_p "$arg"; then pic_object= non_pic_object= # Read the .lo file func_source "$arg" if test -z "$pic_object" || test -z "$non_pic_object" || test none = "$pic_object" && test none = "$non_pic_object"; then func_fatal_error "cannot find name of object for '$arg'" fi # Extract subdirectory from the argument. func_dirname "$arg" "/" "" xdir=$func_dirname_result test none = "$pic_object" || { # Prepend the subdirectory the object is found in. pic_object=$xdir$pic_object if test dlfiles = "$prev"; then if test yes = "$build_libtool_libs" && test yes = "$dlopen_support"; then func_append dlfiles " $pic_object" prev= continue else # If libtool objects are unsupported, then we need to preload. prev=dlprefiles fi fi # CHECK ME: I think I busted this. -Ossama if test dlprefiles = "$prev"; then # Preload the old-style object. func_append dlprefiles " $pic_object" prev= fi # A PIC object. func_append libobjs " $pic_object" arg=$pic_object } # Non-PIC object. if test none != "$non_pic_object"; then # Prepend the subdirectory the object is found in. non_pic_object=$xdir$non_pic_object # A standard non-PIC object func_append non_pic_objects " $non_pic_object" if test -z "$pic_object" || test none = "$pic_object"; then arg=$non_pic_object fi else # If the PIC object exists, use it instead. # $xdir was prepended to $pic_object above. non_pic_object=$pic_object func_append non_pic_objects " $non_pic_object" fi else # Only an error if not doing a dry-run. if $opt_dry_run; then # Extract subdirectory from the argument. func_dirname "$arg" "/" "" xdir=$func_dirname_result func_lo2o "$arg" pic_object=$xdir$objdir/$func_lo2o_result non_pic_object=$xdir$func_lo2o_result func_append libobjs " $pic_object" func_append non_pic_objects " $non_pic_object" else func_fatal_error "'$arg' is not a valid libtool object" fi fi ;; *.$libext) # An archive. func_append deplibs " $arg" func_append old_deplibs " $arg" continue ;; *.la) # A libtool-controlled library. func_resolve_sysroot "$arg" if test dlfiles = "$prev"; then # This library was specified with -dlopen. func_append dlfiles " $func_resolve_sysroot_result" prev= elif test dlprefiles = "$prev"; then # The library was specified with -dlpreopen. func_append dlprefiles " $func_resolve_sysroot_result" prev= else func_append deplibs " $func_resolve_sysroot_result" fi continue ;; # Some other compiler argument. *) # Unknown arguments in both finalize_command and compile_command need # to be aesthetically quoted because they are evaled later. func_quote_for_eval "$arg" arg=$func_quote_for_eval_result ;; esac # arg # Now actually substitute the argument into the commands. if test -n "$arg"; then func_append compile_command " $arg" func_append finalize_command " $arg" fi done # argument parsing loop test -n "$prev" && \ func_fatal_help "the '$prevarg' option requires an argument" if test yes = "$export_dynamic" && test -n "$export_dynamic_flag_spec"; then eval arg=\"$export_dynamic_flag_spec\" func_append compile_command " $arg" func_append finalize_command " $arg" fi oldlibs= # calculate the name of the file, without its directory func_basename "$output" outputname=$func_basename_result libobjs_save=$libobjs if test -n "$shlibpath_var"; then # get the directories listed in $shlibpath_var eval shlib_search_path=\`\$ECHO \"\$$shlibpath_var\" \| \$SED \'s/:/ /g\'\` else shlib_search_path= fi eval sys_lib_search_path=\"$sys_lib_search_path_spec\" eval sys_lib_dlsearch_path=\"$sys_lib_dlsearch_path_spec\" # Definition is injected by LT_CONFIG during libtool generation. func_munge_path_list sys_lib_dlsearch_path "$LT_SYS_LIBRARY_PATH" func_dirname "$output" "/" "" output_objdir=$func_dirname_result$objdir func_to_tool_file "$output_objdir/" tool_output_objdir=$func_to_tool_file_result # Create the object directory. func_mkdir_p "$output_objdir" # Determine the type of output case $output in "") func_fatal_help "you must specify an output file" ;; *.$libext) linkmode=oldlib ;; *.lo | *.$objext) linkmode=obj ;; *.la) linkmode=lib ;; *) linkmode=prog ;; # Anything else should be a program. esac specialdeplibs= libs= # Find all interdependent deplibs by searching for libraries # that are linked more than once (e.g. -la -lb -la) for deplib in $deplibs; do if $opt_preserve_dup_deps; then case "$libs " in *" $deplib "*) func_append specialdeplibs " $deplib" ;; esac fi func_append libs " $deplib" done if test lib = "$linkmode"; then libs="$predeps $libs $compiler_lib_search_path $postdeps" # Compute libraries that are listed more than once in $predeps # $postdeps and mark them as special (i.e., whose duplicates are # not to be eliminated). pre_post_deps= if $opt_duplicate_compiler_generated_deps; then for pre_post_dep in $predeps $postdeps; do case "$pre_post_deps " in *" $pre_post_dep "*) func_append specialdeplibs " $pre_post_deps" ;; esac func_append pre_post_deps " $pre_post_dep" done fi pre_post_deps= fi deplibs= newdependency_libs= newlib_search_path= need_relink=no # whether we're linking any uninstalled libtool libraries notinst_deplibs= # not-installed libtool libraries notinst_path= # paths that contain not-installed libtool libraries case $linkmode in lib) passes="conv dlpreopen link" for file in $dlfiles $dlprefiles; do case $file in *.la) ;; *) func_fatal_help "libraries can '-dlopen' only libtool libraries: $file" ;; esac done ;; prog) compile_deplibs= finalize_deplibs= alldeplibs=false newdlfiles= newdlprefiles= passes="conv scan dlopen dlpreopen link" ;; *) passes="conv" ;; esac for pass in $passes; do # The preopen pass in lib mode reverses $deplibs; put it back here # so that -L comes before libs that need it for instance... if test lib,link = "$linkmode,$pass"; then ## FIXME: Find the place where the list is rebuilt in the wrong ## order, and fix it there properly tmp_deplibs= for deplib in $deplibs; do tmp_deplibs="$deplib $tmp_deplibs" done deplibs=$tmp_deplibs fi if test lib,link = "$linkmode,$pass" || test prog,scan = "$linkmode,$pass"; then libs=$deplibs deplibs= fi if test prog = "$linkmode"; then case $pass in dlopen) libs=$dlfiles ;; dlpreopen) libs=$dlprefiles ;; link) libs="$deplibs %DEPLIBS%" test "X$link_all_deplibs" != Xno && libs="$libs $dependency_libs" ;; esac fi if test lib,dlpreopen = "$linkmode,$pass"; then # Collect and forward deplibs of preopened libtool libs for lib in $dlprefiles; do # Ignore non-libtool-libs dependency_libs= func_resolve_sysroot "$lib" case $lib in *.la) func_source "$func_resolve_sysroot_result" ;; esac # Collect preopened libtool deplibs, except any this library # has declared as weak libs for deplib in $dependency_libs; do func_basename "$deplib" deplib_base=$func_basename_result case " $weak_libs " in *" $deplib_base "*) ;; *) func_append deplibs " $deplib" ;; esac done done libs=$dlprefiles fi if test dlopen = "$pass"; then # Collect dlpreopened libraries save_deplibs=$deplibs deplibs= fi for deplib in $libs; do lib= found=false case $deplib in -mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe \ |-threads|-fopenmp|-openmp|-mp|-xopenmp|-omp|-qsmp=*) if test prog,link = "$linkmode,$pass"; then compile_deplibs="$deplib $compile_deplibs" finalize_deplibs="$deplib $finalize_deplibs" else func_append compiler_flags " $deplib" if test lib = "$linkmode"; then case "$new_inherited_linker_flags " in *" $deplib "*) ;; * ) func_append new_inherited_linker_flags " $deplib" ;; esac fi fi continue ;; -l*) if test lib != "$linkmode" && test prog != "$linkmode"; then func_warning "'-l' is ignored for archives/objects" continue fi func_stripname '-l' '' "$deplib" name=$func_stripname_result if test lib = "$linkmode"; then searchdirs="$newlib_search_path $lib_search_path $compiler_lib_search_dirs $sys_lib_search_path $shlib_search_path" else searchdirs="$newlib_search_path $lib_search_path $sys_lib_search_path $shlib_search_path" fi for searchdir in $searchdirs; do for search_ext in .la $std_shrext .so .a; do # Search the libtool library lib=$searchdir/lib$name$search_ext if test -f "$lib"; then if test .la = "$search_ext"; then found=: else found=false fi break 2 fi done done if $found; then # deplib is a libtool library # If $allow_libtool_libs_with_static_runtimes && $deplib is a stdlib, # We need to do some special things here, and not later. if test yes = "$allow_libtool_libs_with_static_runtimes"; then case " $predeps $postdeps " in *" $deplib "*) if func_lalib_p "$lib"; then library_names= old_library= func_source "$lib" for l in $old_library $library_names; do ll=$l done if test "X$ll" = "X$old_library"; then # only static version available found=false func_dirname "$lib" "" "." ladir=$func_dirname_result lib=$ladir/$old_library if test prog,link = "$linkmode,$pass"; then compile_deplibs="$deplib $compile_deplibs" finalize_deplibs="$deplib $finalize_deplibs" else deplibs="$deplib $deplibs" test lib = "$linkmode" && newdependency_libs="$deplib $newdependency_libs" fi continue fi fi ;; *) ;; esac fi else # deplib doesn't seem to be a libtool library if test prog,link = "$linkmode,$pass"; then compile_deplibs="$deplib $compile_deplibs" finalize_deplibs="$deplib $finalize_deplibs" else deplibs="$deplib $deplibs" test lib = "$linkmode" && newdependency_libs="$deplib $newdependency_libs" fi continue fi ;; # -l *.ltframework) if test prog,link = "$linkmode,$pass"; then compile_deplibs="$deplib $compile_deplibs" finalize_deplibs="$deplib $finalize_deplibs" else deplibs="$deplib $deplibs" if test lib = "$linkmode"; then case "$new_inherited_linker_flags " in *" $deplib "*) ;; * ) func_append new_inherited_linker_flags " $deplib" ;; esac fi fi continue ;; -L*) case $linkmode in lib) deplibs="$deplib $deplibs" test conv = "$pass" && continue newdependency_libs="$deplib $newdependency_libs" func_stripname '-L' '' "$deplib" func_resolve_sysroot "$func_stripname_result" func_append newlib_search_path " $func_resolve_sysroot_result" ;; prog) if test conv = "$pass"; then deplibs="$deplib $deplibs" continue fi if test scan = "$pass"; then deplibs="$deplib $deplibs" else compile_deplibs="$deplib $compile_deplibs" finalize_deplibs="$deplib $finalize_deplibs" fi func_stripname '-L' '' "$deplib" func_resolve_sysroot "$func_stripname_result" func_append newlib_search_path " $func_resolve_sysroot_result" ;; *) func_warning "'-L' is ignored for archives/objects" ;; esac # linkmode continue ;; # -L -R*) if test link = "$pass"; then func_stripname '-R' '' "$deplib" func_resolve_sysroot "$func_stripname_result" dir=$func_resolve_sysroot_result # Make sure the xrpath contains only unique directories. case "$xrpath " in *" $dir "*) ;; *) func_append xrpath " $dir" ;; esac fi deplibs="$deplib $deplibs" continue ;; *.la) func_resolve_sysroot "$deplib" lib=$func_resolve_sysroot_result ;; *.$libext) if test conv = "$pass"; then deplibs="$deplib $deplibs" continue fi case $linkmode in lib) # Linking convenience modules into shared libraries is allowed, # but linking other static libraries is non-portable. case " $dlpreconveniencelibs " in *" $deplib "*) ;; *) valid_a_lib=false case $deplibs_check_method in match_pattern*) set dummy $deplibs_check_method; shift match_pattern_regex=`expr "$deplibs_check_method" : "$1 \(.*\)"` if eval "\$ECHO \"$deplib\"" 2>/dev/null | $SED 10q \ | $EGREP "$match_pattern_regex" > /dev/null; then valid_a_lib=: fi ;; pass_all) valid_a_lib=: ;; esac if $valid_a_lib; then echo $ECHO "*** Warning: Linking the shared library $output against the" $ECHO "*** static library $deplib is not portable!" deplibs="$deplib $deplibs" else echo $ECHO "*** Warning: Trying to link with static lib archive $deplib." echo "*** I have the capability to make that library automatically link in when" echo "*** you link to this library. But I can only do this if you have a" echo "*** shared version of the library, which you do not appear to have" echo "*** because the file extensions .$libext of this argument makes me believe" echo "*** that it is just a static archive that I should not use here." fi ;; esac continue ;; prog) if test link != "$pass"; then deplibs="$deplib $deplibs" else compile_deplibs="$deplib $compile_deplibs" finalize_deplibs="$deplib $finalize_deplibs" fi continue ;; esac # linkmode ;; # *.$libext *.lo | *.$objext) if test conv = "$pass"; then deplibs="$deplib $deplibs" elif test prog = "$linkmode"; then if test dlpreopen = "$pass" || test yes != "$dlopen_support" || test no = "$build_libtool_libs"; then # If there is no dlopen support or we're linking statically, # we need to preload. func_append newdlprefiles " $deplib" compile_deplibs="$deplib $compile_deplibs" finalize_deplibs="$deplib $finalize_deplibs" else func_append newdlfiles " $deplib" fi fi continue ;; %DEPLIBS%) alldeplibs=: continue ;; esac # case $deplib $found || test -f "$lib" \ || func_fatal_error "cannot find the library '$lib' or unhandled argument '$deplib'" # Check to see that this really is a libtool archive. func_lalib_unsafe_p "$lib" \ || func_fatal_error "'$lib' is not a valid libtool archive" func_dirname "$lib" "" "." ladir=$func_dirname_result dlname= dlopen= dlpreopen= libdir= library_names= old_library= inherited_linker_flags= # If the library was installed with an old release of libtool, # it will not redefine variables installed, or shouldnotlink installed=yes shouldnotlink=no avoidtemprpath= # Read the .la file func_source "$lib" # Convert "-framework foo" to "foo.ltframework" if test -n "$inherited_linker_flags"; then tmp_inherited_linker_flags=`$ECHO "$inherited_linker_flags" | $SED 's/-framework \([^ $]*\)/\1.ltframework/g'` for tmp_inherited_linker_flag in $tmp_inherited_linker_flags; do case " $new_inherited_linker_flags " in *" $tmp_inherited_linker_flag "*) ;; *) func_append new_inherited_linker_flags " $tmp_inherited_linker_flag";; esac done fi dependency_libs=`$ECHO " $dependency_libs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` if test lib,link = "$linkmode,$pass" || test prog,scan = "$linkmode,$pass" || { test prog != "$linkmode" && test lib != "$linkmode"; }; then test -n "$dlopen" && func_append dlfiles " $dlopen" test -n "$dlpreopen" && func_append dlprefiles " $dlpreopen" fi if test conv = "$pass"; then # Only check for convenience libraries deplibs="$lib $deplibs" if test -z "$libdir"; then if test -z "$old_library"; then func_fatal_error "cannot find name of link library for '$lib'" fi # It is a libtool convenience library, so add in its objects. func_append convenience " $ladir/$objdir/$old_library" func_append old_convenience " $ladir/$objdir/$old_library" tmp_libs= for deplib in $dependency_libs; do deplibs="$deplib $deplibs" if $opt_preserve_dup_deps; then case "$tmp_libs " in *" $deplib "*) func_append specialdeplibs " $deplib" ;; esac fi func_append tmp_libs " $deplib" done elif test prog != "$linkmode" && test lib != "$linkmode"; then func_fatal_error "'$lib' is not a convenience library" fi continue fi # $pass = conv # Get the name of the library we link against. linklib= if test -n "$old_library" && { test yes = "$prefer_static_libs" || test built,no = "$prefer_static_libs,$installed"; }; then linklib=$old_library else for l in $old_library $library_names; do linklib=$l done fi if test -z "$linklib"; then func_fatal_error "cannot find name of link library for '$lib'" fi # This library was specified with -dlopen. if test dlopen = "$pass"; then test -z "$libdir" \ && func_fatal_error "cannot -dlopen a convenience library: '$lib'" if test -z "$dlname" || test yes != "$dlopen_support" || test no = "$build_libtool_libs" then # If there is no dlname, no dlopen support or we're linking # statically, we need to preload. We also need to preload any # dependent libraries so libltdl's deplib preloader doesn't # bomb out in the load deplibs phase. func_append dlprefiles " $lib $dependency_libs" else func_append newdlfiles " $lib" fi continue fi # $pass = dlopen # We need an absolute path. case $ladir in [\\/]* | [A-Za-z]:[\\/]*) abs_ladir=$ladir ;; *) abs_ladir=`cd "$ladir" && pwd` if test -z "$abs_ladir"; then func_warning "cannot determine absolute directory name of '$ladir'" func_warning "passing it literally to the linker, although it might fail" abs_ladir=$ladir fi ;; esac func_basename "$lib" laname=$func_basename_result # Find the relevant object directory and library name. if test yes = "$installed"; then if test ! -f "$lt_sysroot$libdir/$linklib" && test -f "$abs_ladir/$linklib"; then func_warning "library '$lib' was moved." dir=$ladir absdir=$abs_ladir libdir=$abs_ladir else dir=$lt_sysroot$libdir absdir=$lt_sysroot$libdir fi test yes = "$hardcode_automatic" && avoidtemprpath=yes else if test ! -f "$ladir/$objdir/$linklib" && test -f "$abs_ladir/$linklib"; then dir=$ladir absdir=$abs_ladir # Remove this search path later func_append notinst_path " $abs_ladir" else dir=$ladir/$objdir absdir=$abs_ladir/$objdir # Remove this search path later func_append notinst_path " $abs_ladir" fi fi # $installed = yes func_stripname 'lib' '.la' "$laname" name=$func_stripname_result # This library was specified with -dlpreopen. if test dlpreopen = "$pass"; then if test -z "$libdir" && test prog = "$linkmode"; then func_fatal_error "only libraries may -dlpreopen a convenience library: '$lib'" fi case $host in # special handling for platforms with PE-DLLs. *cygwin* | *mingw* | *cegcc* ) # Linker will automatically link against shared library if both # static and shared are present. Therefore, ensure we extract # symbols from the import library if a shared library is present # (otherwise, the dlopen module name will be incorrect). We do # this by putting the import library name into $newdlprefiles. # We recover the dlopen module name by 'saving' the la file # name in a special purpose variable, and (later) extracting the # dlname from the la file. if test -n "$dlname"; then func_tr_sh "$dir/$linklib" eval "libfile_$func_tr_sh_result=\$abs_ladir/\$laname" func_append newdlprefiles " $dir/$linklib" else func_append newdlprefiles " $dir/$old_library" # Keep a list of preopened convenience libraries to check # that they are being used correctly in the link pass. test -z "$libdir" && \ func_append dlpreconveniencelibs " $dir/$old_library" fi ;; * ) # Prefer using a static library (so that no silly _DYNAMIC symbols # are required to link). if test -n "$old_library"; then func_append newdlprefiles " $dir/$old_library" # Keep a list of preopened convenience libraries to check # that they are being used correctly in the link pass. test -z "$libdir" && \ func_append dlpreconveniencelibs " $dir/$old_library" # Otherwise, use the dlname, so that lt_dlopen finds it. elif test -n "$dlname"; then func_append newdlprefiles " $dir/$dlname" else func_append newdlprefiles " $dir/$linklib" fi ;; esac fi # $pass = dlpreopen if test -z "$libdir"; then # Link the convenience library if test lib = "$linkmode"; then deplibs="$dir/$old_library $deplibs" elif test prog,link = "$linkmode,$pass"; then compile_deplibs="$dir/$old_library $compile_deplibs" finalize_deplibs="$dir/$old_library $finalize_deplibs" else deplibs="$lib $deplibs" # used for prog,scan pass fi continue fi if test prog = "$linkmode" && test link != "$pass"; then func_append newlib_search_path " $ladir" deplibs="$lib $deplibs" linkalldeplibs=false if test no != "$link_all_deplibs" || test -z "$library_names" || test no = "$build_libtool_libs"; then linkalldeplibs=: fi tmp_libs= for deplib in $dependency_libs; do case $deplib in -L*) func_stripname '-L' '' "$deplib" func_resolve_sysroot "$func_stripname_result" func_append newlib_search_path " $func_resolve_sysroot_result" ;; esac # Need to link against all dependency_libs? if $linkalldeplibs; then deplibs="$deplib $deplibs" else # Need to hardcode shared library paths # or/and link against static libraries newdependency_libs="$deplib $newdependency_libs" fi if $opt_preserve_dup_deps; then case "$tmp_libs " in *" $deplib "*) func_append specialdeplibs " $deplib" ;; esac fi func_append tmp_libs " $deplib" done # for deplib continue fi # $linkmode = prog... if test prog,link = "$linkmode,$pass"; then if test -n "$library_names" && { { test no = "$prefer_static_libs" || test built,yes = "$prefer_static_libs,$installed"; } || test -z "$old_library"; }; then # We need to hardcode the library path if test -n "$shlibpath_var" && test -z "$avoidtemprpath"; then # Make sure the rpath contains only unique directories. case $temp_rpath: in *"$absdir:"*) ;; *) func_append temp_rpath "$absdir:" ;; esac fi # Hardcode the library path. # Skip directories that are in the system default run-time # search path. case " $sys_lib_dlsearch_path " in *" $absdir "*) ;; *) case "$compile_rpath " in *" $absdir "*) ;; *) func_append compile_rpath " $absdir" ;; esac ;; esac case " $sys_lib_dlsearch_path " in *" $libdir "*) ;; *) case "$finalize_rpath " in *" $libdir "*) ;; *) func_append finalize_rpath " $libdir" ;; esac ;; esac fi # $linkmode,$pass = prog,link... if $alldeplibs && { test pass_all = "$deplibs_check_method" || { test yes = "$build_libtool_libs" && test -n "$library_names"; }; }; then # We only need to search for static libraries continue fi fi link_static=no # Whether the deplib will be linked statically use_static_libs=$prefer_static_libs if test built = "$use_static_libs" && test yes = "$installed"; then use_static_libs=no fi if test -n "$library_names" && { test no = "$use_static_libs" || test -z "$old_library"; }; then case $host in *cygwin* | *mingw* | *cegcc* | *os2*) # No point in relinking DLLs because paths are not encoded func_append notinst_deplibs " $lib" need_relink=no ;; *) if test no = "$installed"; then func_append notinst_deplibs " $lib" need_relink=yes fi ;; esac # This is a shared library # Warn about portability, can't link against -module's on some # systems (darwin). Don't bleat about dlopened modules though! dlopenmodule= for dlpremoduletest in $dlprefiles; do if test "X$dlpremoduletest" = "X$lib"; then dlopenmodule=$dlpremoduletest break fi done if test -z "$dlopenmodule" && test yes = "$shouldnotlink" && test link = "$pass"; then echo if test prog = "$linkmode"; then $ECHO "*** Warning: Linking the executable $output against the loadable module" else $ECHO "*** Warning: Linking the shared library $output against the loadable module" fi $ECHO "*** $linklib is not portable!" fi if test lib = "$linkmode" && test yes = "$hardcode_into_libs"; then # Hardcode the library path. # Skip directories that are in the system default run-time # search path. case " $sys_lib_dlsearch_path " in *" $absdir "*) ;; *) case "$compile_rpath " in *" $absdir "*) ;; *) func_append compile_rpath " $absdir" ;; esac ;; esac case " $sys_lib_dlsearch_path " in *" $libdir "*) ;; *) case "$finalize_rpath " in *" $libdir "*) ;; *) func_append finalize_rpath " $libdir" ;; esac ;; esac fi if test -n "$old_archive_from_expsyms_cmds"; then # figure out the soname set dummy $library_names shift realname=$1 shift libname=`eval "\\$ECHO \"$libname_spec\""` # use dlname if we got it. it's perfectly good, no? if test -n "$dlname"; then soname=$dlname elif test -n "$soname_spec"; then # bleh windows case $host in *cygwin* | mingw* | *cegcc* | *os2*) func_arith $current - $age major=$func_arith_result versuffix=-$major ;; esac eval soname=\"$soname_spec\" else soname=$realname fi # Make a new name for the extract_expsyms_cmds to use soroot=$soname func_basename "$soroot" soname=$func_basename_result func_stripname 'lib' '.dll' "$soname" newlib=libimp-$func_stripname_result.a # If the library has no export list, then create one now if test -f "$output_objdir/$soname-def"; then : else func_verbose "extracting exported symbol list from '$soname'" func_execute_cmds "$extract_expsyms_cmds" 'exit $?' fi # Create $newlib if test -f "$output_objdir/$newlib"; then :; else func_verbose "generating import library for '$soname'" func_execute_cmds "$old_archive_from_expsyms_cmds" 'exit $?' fi # make sure the library variables are pointing to the new library dir=$output_objdir linklib=$newlib fi # test -n "$old_archive_from_expsyms_cmds" if test prog = "$linkmode" || test relink != "$opt_mode"; then add_shlibpath= add_dir= add= lib_linked=yes case $hardcode_action in immediate | unsupported) if test no = "$hardcode_direct"; then add=$dir/$linklib case $host in *-*-sco3.2v5.0.[024]*) add_dir=-L$dir ;; *-*-sysv4*uw2*) add_dir=-L$dir ;; *-*-sysv5OpenUNIX* | *-*-sysv5UnixWare7.[01].[10]* | \ *-*-unixware7*) add_dir=-L$dir ;; *-*-darwin* ) # if the lib is a (non-dlopened) module then we cannot # link against it, someone is ignoring the earlier warnings if /usr/bin/file -L $add 2> /dev/null | $GREP ": [^:]* bundle" >/dev/null; then if test "X$dlopenmodule" != "X$lib"; then $ECHO "*** Warning: lib $linklib is a module, not a shared library" if test -z "$old_library"; then echo echo "*** And there doesn't seem to be a static archive available" echo "*** The link will probably fail, sorry" else add=$dir/$old_library fi elif test -n "$old_library"; then add=$dir/$old_library fi fi esac elif test no = "$hardcode_minus_L"; then case $host in *-*-sunos*) add_shlibpath=$dir ;; esac add_dir=-L$dir add=-l$name elif test no = "$hardcode_shlibpath_var"; then add_shlibpath=$dir add=-l$name else lib_linked=no fi ;; relink) if test yes = "$hardcode_direct" && test no = "$hardcode_direct_absolute"; then add=$dir/$linklib elif test yes = "$hardcode_minus_L"; then add_dir=-L$absdir # Try looking first in the location we're being installed to. if test -n "$inst_prefix_dir"; then case $libdir in [\\/]*) func_append add_dir " -L$inst_prefix_dir$libdir" ;; esac fi add=-l$name elif test yes = "$hardcode_shlibpath_var"; then add_shlibpath=$dir add=-l$name else lib_linked=no fi ;; *) lib_linked=no ;; esac if test yes != "$lib_linked"; then func_fatal_configuration "unsupported hardcode properties" fi if test -n "$add_shlibpath"; then case :$compile_shlibpath: in *":$add_shlibpath:"*) ;; *) func_append compile_shlibpath "$add_shlibpath:" ;; esac fi if test prog = "$linkmode"; then test -n "$add_dir" && compile_deplibs="$add_dir $compile_deplibs" test -n "$add" && compile_deplibs="$add $compile_deplibs" else test -n "$add_dir" && deplibs="$add_dir $deplibs" test -n "$add" && deplibs="$add $deplibs" if test yes != "$hardcode_direct" && test yes != "$hardcode_minus_L" && test yes = "$hardcode_shlibpath_var"; then case :$finalize_shlibpath: in *":$libdir:"*) ;; *) func_append finalize_shlibpath "$libdir:" ;; esac fi fi fi if test prog = "$linkmode" || test relink = "$opt_mode"; then add_shlibpath= add_dir= add= # Finalize command for both is simple: just hardcode it. if test yes = "$hardcode_direct" && test no = "$hardcode_direct_absolute"; then add=$libdir/$linklib elif test yes = "$hardcode_minus_L"; then add_dir=-L$libdir add=-l$name elif test yes = "$hardcode_shlibpath_var"; then case :$finalize_shlibpath: in *":$libdir:"*) ;; *) func_append finalize_shlibpath "$libdir:" ;; esac add=-l$name elif test yes = "$hardcode_automatic"; then if test -n "$inst_prefix_dir" && test -f "$inst_prefix_dir$libdir/$linklib"; then add=$inst_prefix_dir$libdir/$linklib else add=$libdir/$linklib fi else # We cannot seem to hardcode it, guess we'll fake it. add_dir=-L$libdir # Try looking first in the location we're being installed to. if test -n "$inst_prefix_dir"; then case $libdir in [\\/]*) func_append add_dir " -L$inst_prefix_dir$libdir" ;; esac fi add=-l$name fi if test prog = "$linkmode"; then test -n "$add_dir" && finalize_deplibs="$add_dir $finalize_deplibs" test -n "$add" && finalize_deplibs="$add $finalize_deplibs" else test -n "$add_dir" && deplibs="$add_dir $deplibs" test -n "$add" && deplibs="$add $deplibs" fi fi elif test prog = "$linkmode"; then # Here we assume that one of hardcode_direct or hardcode_minus_L # is not unsupported. This is valid on all known static and # shared platforms. if test unsupported != "$hardcode_direct"; then test -n "$old_library" && linklib=$old_library compile_deplibs="$dir/$linklib $compile_deplibs" finalize_deplibs="$dir/$linklib $finalize_deplibs" else compile_deplibs="-l$name -L$dir $compile_deplibs" finalize_deplibs="-l$name -L$dir $finalize_deplibs" fi elif test yes = "$build_libtool_libs"; then # Not a shared library if test pass_all != "$deplibs_check_method"; then # We're trying link a shared library against a static one # but the system doesn't support it. # Just print a warning and add the library to dependency_libs so # that the program can be linked against the static library. echo $ECHO "*** Warning: This system cannot link to static lib archive $lib." echo "*** I have the capability to make that library automatically link in when" echo "*** you link to this library. But I can only do this if you have a" echo "*** shared version of the library, which you do not appear to have." if test yes = "$module"; then echo "*** But as you try to build a module library, libtool will still create " echo "*** a static module, that should work as long as the dlopening application" echo "*** is linked with the -dlopen flag to resolve symbols at runtime." if test -z "$global_symbol_pipe"; then echo echo "*** However, this would only work if libtool was able to extract symbol" echo "*** lists from a program, using 'nm' or equivalent, but libtool could" echo "*** not find such a program. So, this module is probably useless." echo "*** 'nm' from GNU binutils and a full rebuild may help." fi if test no = "$build_old_libs"; then build_libtool_libs=module build_old_libs=yes else build_libtool_libs=no fi fi else deplibs="$dir/$old_library $deplibs" link_static=yes fi fi # link shared/static library? if test lib = "$linkmode"; then if test -n "$dependency_libs" && { test yes != "$hardcode_into_libs" || test yes = "$build_old_libs" || test yes = "$link_static"; }; then # Extract -R from dependency_libs temp_deplibs= for libdir in $dependency_libs; do case $libdir in -R*) func_stripname '-R' '' "$libdir" temp_xrpath=$func_stripname_result case " $xrpath " in *" $temp_xrpath "*) ;; *) func_append xrpath " $temp_xrpath";; esac;; *) func_append temp_deplibs " $libdir";; esac done dependency_libs=$temp_deplibs fi func_append newlib_search_path " $absdir" # Link against this library test no = "$link_static" && newdependency_libs="$abs_ladir/$laname $newdependency_libs" # ... and its dependency_libs tmp_libs= for deplib in $dependency_libs; do newdependency_libs="$deplib $newdependency_libs" case $deplib in -L*) func_stripname '-L' '' "$deplib" func_resolve_sysroot "$func_stripname_result";; *) func_resolve_sysroot "$deplib" ;; esac if $opt_preserve_dup_deps; then case "$tmp_libs " in *" $func_resolve_sysroot_result "*) func_append specialdeplibs " $func_resolve_sysroot_result" ;; esac fi func_append tmp_libs " $func_resolve_sysroot_result" done if test no != "$link_all_deplibs"; then # Add the search paths of all dependency libraries for deplib in $dependency_libs; do path= case $deplib in -L*) path=$deplib ;; *.la) func_resolve_sysroot "$deplib" deplib=$func_resolve_sysroot_result func_dirname "$deplib" "" "." dir=$func_dirname_result # We need an absolute path. case $dir in [\\/]* | [A-Za-z]:[\\/]*) absdir=$dir ;; *) absdir=`cd "$dir" && pwd` if test -z "$absdir"; then func_warning "cannot determine absolute directory name of '$dir'" absdir=$dir fi ;; esac if $GREP "^installed=no" $deplib > /dev/null; then case $host in *-*-darwin*) depdepl= eval deplibrary_names=`$SED -n -e 's/^library_names=\(.*\)$/\1/p' $deplib` if test -n "$deplibrary_names"; then for tmp in $deplibrary_names; do depdepl=$tmp done if test -f "$absdir/$objdir/$depdepl"; then depdepl=$absdir/$objdir/$depdepl darwin_install_name=`$OTOOL -L $depdepl | awk '{if (NR == 2) {print $1;exit}}'` if test -z "$darwin_install_name"; then darwin_install_name=`$OTOOL64 -L $depdepl | awk '{if (NR == 2) {print $1;exit}}'` fi func_append compiler_flags " $wl-dylib_file $wl$darwin_install_name:$depdepl" func_append linker_flags " -dylib_file $darwin_install_name:$depdepl" path= fi fi ;; *) path=-L$absdir/$objdir ;; esac else eval libdir=`$SED -n -e 's/^libdir=\(.*\)$/\1/p' $deplib` test -z "$libdir" && \ func_fatal_error "'$deplib' is not a valid libtool archive" test "$absdir" != "$libdir" && \ func_warning "'$deplib' seems to be moved" path=-L$absdir fi ;; esac case " $deplibs " in *" $path "*) ;; *) deplibs="$path $deplibs" ;; esac done fi # link_all_deplibs != no fi # linkmode = lib done # for deplib in $libs if test link = "$pass"; then if test prog = "$linkmode"; then compile_deplibs="$new_inherited_linker_flags $compile_deplibs" finalize_deplibs="$new_inherited_linker_flags $finalize_deplibs" else compiler_flags="$compiler_flags "`$ECHO " $new_inherited_linker_flags" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` fi fi dependency_libs=$newdependency_libs if test dlpreopen = "$pass"; then # Link the dlpreopened libraries before other libraries for deplib in $save_deplibs; do deplibs="$deplib $deplibs" done fi if test dlopen != "$pass"; then test conv = "$pass" || { # Make sure lib_search_path contains only unique directories. lib_search_path= for dir in $newlib_search_path; do case "$lib_search_path " in *" $dir "*) ;; *) func_append lib_search_path " $dir" ;; esac done newlib_search_path= } if test prog,link = "$linkmode,$pass"; then vars="compile_deplibs finalize_deplibs" else vars=deplibs fi for var in $vars dependency_libs; do # Add libraries to $var in reverse order eval tmp_libs=\"\$$var\" new_libs= for deplib in $tmp_libs; do # FIXME: Pedantically, this is the right thing to do, so # that some nasty dependency loop isn't accidentally # broken: #new_libs="$deplib $new_libs" # Pragmatically, this seems to cause very few problems in # practice: case $deplib in -L*) new_libs="$deplib $new_libs" ;; -R*) ;; *) # And here is the reason: when a library appears more # than once as an explicit dependence of a library, or # is implicitly linked in more than once by the # compiler, it is considered special, and multiple # occurrences thereof are not removed. Compare this # with having the same library being listed as a # dependency of multiple other libraries: in this case, # we know (pedantically, we assume) the library does not # need to be listed more than once, so we keep only the # last copy. This is not always right, but it is rare # enough that we require users that really mean to play # such unportable linking tricks to link the library # using -Wl,-lname, so that libtool does not consider it # for duplicate removal. case " $specialdeplibs " in *" $deplib "*) new_libs="$deplib $new_libs" ;; *) case " $new_libs " in *" $deplib "*) ;; *) new_libs="$deplib $new_libs" ;; esac ;; esac ;; esac done tmp_libs= for deplib in $new_libs; do case $deplib in -L*) case " $tmp_libs " in *" $deplib "*) ;; *) func_append tmp_libs " $deplib" ;; esac ;; *) func_append tmp_libs " $deplib" ;; esac done eval $var=\"$tmp_libs\" done # for var fi # Add Sun CC postdeps if required: test CXX = "$tagname" && { case $host_os in linux*) case `$CC -V 2>&1 | sed 5q` in *Sun\ C*) # Sun C++ 5.9 func_suncc_cstd_abi if test no != "$suncc_use_cstd_abi"; then func_append postdeps ' -library=Cstd -library=Crun' fi ;; esac ;; solaris*) func_cc_basename "$CC" case $func_cc_basename_result in CC* | sunCC*) func_suncc_cstd_abi if test no != "$suncc_use_cstd_abi"; then func_append postdeps ' -library=Cstd -library=Crun' fi ;; esac ;; esac } # Last step: remove runtime libs from dependency_libs # (they stay in deplibs) tmp_libs= for i in $dependency_libs; do case " $predeps $postdeps $compiler_lib_search_path " in *" $i "*) i= ;; esac if test -n "$i"; then func_append tmp_libs " $i" fi done dependency_libs=$tmp_libs done # for pass if test prog = "$linkmode"; then dlfiles=$newdlfiles fi if test prog = "$linkmode" || test lib = "$linkmode"; then dlprefiles=$newdlprefiles fi case $linkmode in oldlib) if test -n "$dlfiles$dlprefiles" || test no != "$dlself"; then func_warning "'-dlopen' is ignored for archives" fi case " $deplibs" in *\ -l* | *\ -L*) func_warning "'-l' and '-L' are ignored for archives" ;; esac test -n "$rpath" && \ func_warning "'-rpath' is ignored for archives" test -n "$xrpath" && \ func_warning "'-R' is ignored for archives" test -n "$vinfo" && \ func_warning "'-version-info/-version-number' is ignored for archives" test -n "$release" && \ func_warning "'-release' is ignored for archives" test -n "$export_symbols$export_symbols_regex" && \ func_warning "'-export-symbols' is ignored for archives" # Now set the variables for building old libraries. build_libtool_libs=no oldlibs=$output func_append objs "$old_deplibs" ;; lib) # Make sure we only generate libraries of the form 'libNAME.la'. case $outputname in lib*) func_stripname 'lib' '.la' "$outputname" name=$func_stripname_result eval shared_ext=\"$shrext_cmds\" eval libname=\"$libname_spec\" ;; *) test no = "$module" \ && func_fatal_help "libtool library '$output' must begin with 'lib'" if test no != "$need_lib_prefix"; then # Add the "lib" prefix for modules if required func_stripname '' '.la' "$outputname" name=$func_stripname_result eval shared_ext=\"$shrext_cmds\" eval libname=\"$libname_spec\" else func_stripname '' '.la' "$outputname" libname=$func_stripname_result fi ;; esac if test -n "$objs"; then if test pass_all != "$deplibs_check_method"; then func_fatal_error "cannot build libtool library '$output' from non-libtool objects on this host:$objs" else echo $ECHO "*** Warning: Linking the shared library $output against the non-libtool" $ECHO "*** objects $objs is not portable!" func_append libobjs " $objs" fi fi test no = "$dlself" \ || func_warning "'-dlopen self' is ignored for libtool libraries" set dummy $rpath shift test 1 -lt "$#" \ && func_warning "ignoring multiple '-rpath's for a libtool library" install_libdir=$1 oldlibs= if test -z "$rpath"; then if test yes = "$build_libtool_libs"; then # Building a libtool convenience library. # Some compilers have problems with a '.al' extension so # convenience libraries should have the same extension an # archive normally would. oldlibs="$output_objdir/$libname.$libext $oldlibs" build_libtool_libs=convenience build_old_libs=yes fi test -n "$vinfo" && \ func_warning "'-version-info/-version-number' is ignored for convenience libraries" test -n "$release" && \ func_warning "'-release' is ignored for convenience libraries" else # Parse the version information argument. save_ifs=$IFS; IFS=: set dummy $vinfo 0 0 0 shift IFS=$save_ifs test -n "$7" && \ func_fatal_help "too many parameters to '-version-info'" # convert absolute version numbers to libtool ages # this retains compatibility with .la files and attempts # to make the code below a bit more comprehensible case $vinfo_number in yes) number_major=$1 number_minor=$2 number_revision=$3 # # There are really only two kinds -- those that # use the current revision as the major version # and those that subtract age and use age as # a minor version. But, then there is irix # that has an extra 1 added just for fun # case $version_type in # correct linux to gnu/linux during the next big refactor darwin|freebsd-elf|linux|osf|windows|none) func_arith $number_major + $number_minor current=$func_arith_result age=$number_minor revision=$number_revision ;; freebsd-aout|qnx|sunos) current=$number_major revision=$number_minor age=0 ;; irix|nonstopux) func_arith $number_major + $number_minor current=$func_arith_result age=$number_minor revision=$number_minor lt_irix_increment=no ;; *) func_fatal_configuration "$modename: unknown library version type '$version_type'" ;; esac ;; no) current=$1 revision=$2 age=$3 ;; esac # Check that each of the things are valid numbers. case $current in 0|[1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-9][0-9][0-9][0-9]|[1-9][0-9][0-9][0-9][0-9]) ;; *) func_error "CURRENT '$current' must be a nonnegative integer" func_fatal_error "'$vinfo' is not valid version information" ;; esac case $revision in 0|[1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-9][0-9][0-9][0-9]|[1-9][0-9][0-9][0-9][0-9]) ;; *) func_error "REVISION '$revision' must be a nonnegative integer" func_fatal_error "'$vinfo' is not valid version information" ;; esac case $age in 0|[1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-9][0-9][0-9][0-9]|[1-9][0-9][0-9][0-9][0-9]) ;; *) func_error "AGE '$age' must be a nonnegative integer" func_fatal_error "'$vinfo' is not valid version information" ;; esac if test "$age" -gt "$current"; then func_error "AGE '$age' is greater than the current interface number '$current'" func_fatal_error "'$vinfo' is not valid version information" fi # Calculate the version variables. major= versuffix= verstring= case $version_type in none) ;; darwin) # Like Linux, but with the current version available in # verstring for coding it into the library header func_arith $current - $age major=.$func_arith_result versuffix=$major.$age.$revision # Darwin ld doesn't like 0 for these options... func_arith $current + 1 minor_current=$func_arith_result xlcverstring="$wl-compatibility_version $wl$minor_current $wl-current_version $wl$minor_current.$revision" verstring="-compatibility_version $minor_current -current_version $minor_current.$revision" # On Darwin other compilers case $CC in nagfor*) verstring="$wl-compatibility_version $wl$minor_current $wl-current_version $wl$minor_current.$revision" ;; *) verstring="-compatibility_version $minor_current -current_version $minor_current.$revision" ;; esac ;; freebsd-aout) major=.$current versuffix=.$current.$revision ;; freebsd-elf) func_arith $current - $age major=.$func_arith_result versuffix=$major.$age.$revision ;; irix | nonstopux) if test no = "$lt_irix_increment"; then func_arith $current - $age else func_arith $current - $age + 1 fi major=$func_arith_result case $version_type in nonstopux) verstring_prefix=nonstopux ;; *) verstring_prefix=sgi ;; esac verstring=$verstring_prefix$major.$revision # Add in all the interfaces that we are compatible with. loop=$revision while test 0 -ne "$loop"; do func_arith $revision - $loop iface=$func_arith_result func_arith $loop - 1 loop=$func_arith_result verstring=$verstring_prefix$major.$iface:$verstring done # Before this point, $major must not contain '.'. major=.$major versuffix=$major.$revision ;; linux) # correct to gnu/linux during the next big refactor func_arith $current - $age major=.$func_arith_result versuffix=$major.$age.$revision ;; osf) func_arith $current - $age major=.$func_arith_result versuffix=.$current.$age.$revision verstring=$current.$age.$revision # Add in all the interfaces that we are compatible with. loop=$age while test 0 -ne "$loop"; do func_arith $current - $loop iface=$func_arith_result func_arith $loop - 1 loop=$func_arith_result verstring=$verstring:$iface.0 done # Make executables depend on our current version. func_append verstring ":$current.0" ;; qnx) major=.$current versuffix=.$current ;; sco) major=.$current versuffix=.$current ;; sunos) major=.$current versuffix=.$current.$revision ;; windows) # Use '-' rather than '.', since we only want one # extension on DOS 8.3 file systems. func_arith $current - $age major=$func_arith_result versuffix=-$major ;; *) func_fatal_configuration "unknown library version type '$version_type'" ;; esac # Clear the version info if we defaulted, and they specified a release. if test -z "$vinfo" && test -n "$release"; then major= case $version_type in darwin) # we can't check for "0.0" in archive_cmds due to quoting # problems, so we reset it completely verstring= ;; *) verstring=0.0 ;; esac if test no = "$need_version"; then versuffix= else versuffix=.0.0 fi fi # Remove version info from name if versioning should be avoided if test yes,no = "$avoid_version,$need_version"; then major= versuffix= verstring= fi # Check to see if the archive will have undefined symbols. if test yes = "$allow_undefined"; then if test unsupported = "$allow_undefined_flag"; then if test yes = "$build_old_libs"; then func_warning "undefined symbols not allowed in $host shared libraries; building static only" build_libtool_libs=no else func_fatal_error "can't build $host shared library unless -no-undefined is specified" fi fi else # Don't allow undefined symbols. allow_undefined_flag=$no_undefined_flag fi fi func_generate_dlsyms "$libname" "$libname" : func_append libobjs " $symfileobj" test " " = "$libobjs" && libobjs= if test relink != "$opt_mode"; then # Remove our outputs, but don't remove object files since they # may have been created when compiling PIC objects. removelist= tempremovelist=`$ECHO "$output_objdir/*"` for p in $tempremovelist; do case $p in *.$objext | *.gcno) ;; $output_objdir/$outputname | $output_objdir/$libname.* | $output_objdir/$libname$release.*) if test -n "$precious_files_regex"; then if $ECHO "$p" | $EGREP -e "$precious_files_regex" >/dev/null 2>&1 then continue fi fi func_append removelist " $p" ;; *) ;; esac done test -n "$removelist" && \ func_show_eval "${RM}r \$removelist" fi # Now set the variables for building old libraries. if test yes = "$build_old_libs" && test convenience != "$build_libtool_libs"; then func_append oldlibs " $output_objdir/$libname.$libext" # Transform .lo files to .o files. oldobjs="$objs "`$ECHO "$libobjs" | $SP2NL | $SED "/\.$libext$/d; $lo2o" | $NL2SP` fi # Eliminate all temporary directories. #for path in $notinst_path; do # lib_search_path=`$ECHO "$lib_search_path " | $SED "s% $path % %g"` # deplibs=`$ECHO "$deplibs " | $SED "s% -L$path % %g"` # dependency_libs=`$ECHO "$dependency_libs " | $SED "s% -L$path % %g"` #done if test -n "$xrpath"; then # If the user specified any rpath flags, then add them. temp_xrpath= for libdir in $xrpath; do func_replace_sysroot "$libdir" func_append temp_xrpath " -R$func_replace_sysroot_result" case "$finalize_rpath " in *" $libdir "*) ;; *) func_append finalize_rpath " $libdir" ;; esac done if test yes != "$hardcode_into_libs" || test yes = "$build_old_libs"; then dependency_libs="$temp_xrpath $dependency_libs" fi fi # Make sure dlfiles contains only unique files that won't be dlpreopened old_dlfiles=$dlfiles dlfiles= for lib in $old_dlfiles; do case " $dlprefiles $dlfiles " in *" $lib "*) ;; *) func_append dlfiles " $lib" ;; esac done # Make sure dlprefiles contains only unique files old_dlprefiles=$dlprefiles dlprefiles= for lib in $old_dlprefiles; do case "$dlprefiles " in *" $lib "*) ;; *) func_append dlprefiles " $lib" ;; esac done if test yes = "$build_libtool_libs"; then if test -n "$rpath"; then case $host in *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-*-beos* | *-cegcc* | *-*-haiku*) # these systems don't actually have a c library (as such)! ;; *-*-rhapsody* | *-*-darwin1.[012]) # Rhapsody C library is in the System framework func_append deplibs " System.ltframework" ;; *-*-netbsd*) # Don't link with libc until the a.out ld.so is fixed. ;; *-*-openbsd* | *-*-freebsd* | *-*-dragonfly*) # Do not include libc due to us having libc/libc_r. ;; *-*-sco3.2v5* | *-*-sco5v6*) # Causes problems with __ctype ;; *-*-sysv4.2uw2* | *-*-sysv5* | *-*-unixware* | *-*-OpenUNIX*) # Compiler inserts libc in the correct place for threads to work ;; *) # Add libc to deplibs on all other systems if necessary. if test yes = "$build_libtool_need_lc"; then func_append deplibs " -lc" fi ;; esac fi # Transform deplibs into only deplibs that can be linked in shared. name_save=$name libname_save=$libname release_save=$release versuffix_save=$versuffix major_save=$major # I'm not sure if I'm treating the release correctly. I think # release should show up in the -l (ie -lgmp5) so we don't want to # add it in twice. Is that correct? release= versuffix= major= newdeplibs= droppeddeps=no case $deplibs_check_method in pass_all) # Don't check for shared/static. Everything works. # This might be a little naive. We might want to check # whether the library exists or not. But this is on # osf3 & osf4 and I'm not really sure... Just # implementing what was already the behavior. newdeplibs=$deplibs ;; test_compile) # This code stresses the "libraries are programs" paradigm to its # limits. Maybe even breaks it. We compile a program, linking it # against the deplibs as a proxy for the library. Then we can check # whether they linked in statically or dynamically with ldd. $opt_dry_run || $RM conftest.c cat > conftest.c </dev/null` $nocaseglob else potential_libs=`ls $i/$libnameglob[.-]* 2>/dev/null` fi for potent_lib in $potential_libs; do # Follow soft links. if ls -lLd "$potent_lib" 2>/dev/null | $GREP " -> " >/dev/null; then continue fi # The statement above tries to avoid entering an # endless loop below, in case of cyclic links. # We might still enter an endless loop, since a link # loop can be closed while we follow links, # but so what? potlib=$potent_lib while test -h "$potlib" 2>/dev/null; do potliblink=`ls -ld $potlib | $SED 's/.* -> //'` case $potliblink in [\\/]* | [A-Za-z]:[\\/]*) potlib=$potliblink;; *) potlib=`$ECHO "$potlib" | $SED 's|[^/]*$||'`"$potliblink";; esac done if eval $file_magic_cmd \"\$potlib\" 2>/dev/null | $SED -e 10q | $EGREP "$file_magic_regex" > /dev/null; then func_append newdeplibs " $a_deplib" a_deplib= break 2 fi done done fi if test -n "$a_deplib"; then droppeddeps=yes echo $ECHO "*** Warning: linker path does not have real file for library $a_deplib." echo "*** I have the capability to make that library automatically link in when" echo "*** you link to this library. But I can only do this if you have a" echo "*** shared version of the library, which you do not appear to have" echo "*** because I did check the linker path looking for a file starting" if test -z "$potlib"; then $ECHO "*** with $libname but no candidates were found. (...for file magic test)" else $ECHO "*** with $libname and none of the candidates passed a file format test" $ECHO "*** using a file magic. Last file checked: $potlib" fi fi ;; *) # Add a -L argument. func_append newdeplibs " $a_deplib" ;; esac done # Gone through all deplibs. ;; match_pattern*) set dummy $deplibs_check_method; shift match_pattern_regex=`expr "$deplibs_check_method" : "$1 \(.*\)"` for a_deplib in $deplibs; do case $a_deplib in -l*) func_stripname -l '' "$a_deplib" name=$func_stripname_result if test yes = "$allow_libtool_libs_with_static_runtimes"; then case " $predeps $postdeps " in *" $a_deplib "*) func_append newdeplibs " $a_deplib" a_deplib= ;; esac fi if test -n "$a_deplib"; then libname=`eval "\\$ECHO \"$libname_spec\""` for i in $lib_search_path $sys_lib_search_path $shlib_search_path; do potential_libs=`ls $i/$libname[.-]* 2>/dev/null` for potent_lib in $potential_libs; do potlib=$potent_lib # see symlink-check above in file_magic test if eval "\$ECHO \"$potent_lib\"" 2>/dev/null | $SED 10q | \ $EGREP "$match_pattern_regex" > /dev/null; then func_append newdeplibs " $a_deplib" a_deplib= break 2 fi done done fi if test -n "$a_deplib"; then droppeddeps=yes echo $ECHO "*** Warning: linker path does not have real file for library $a_deplib." echo "*** I have the capability to make that library automatically link in when" echo "*** you link to this library. But I can only do this if you have a" echo "*** shared version of the library, which you do not appear to have" echo "*** because I did check the linker path looking for a file starting" if test -z "$potlib"; then $ECHO "*** with $libname but no candidates were found. (...for regex pattern test)" else $ECHO "*** with $libname and none of the candidates passed a file format test" $ECHO "*** using a regex pattern. Last file checked: $potlib" fi fi ;; *) # Add a -L argument. func_append newdeplibs " $a_deplib" ;; esac done # Gone through all deplibs. ;; none | unknown | *) newdeplibs= tmp_deplibs=`$ECHO " $deplibs" | $SED 's/ -lc$//; s/ -[LR][^ ]*//g'` if test yes = "$allow_libtool_libs_with_static_runtimes"; then for i in $predeps $postdeps; do # can't use Xsed below, because $i might contain '/' tmp_deplibs=`$ECHO " $tmp_deplibs" | $SED "s|$i||"` done fi case $tmp_deplibs in *[!\ \ ]*) echo if test none = "$deplibs_check_method"; then echo "*** Warning: inter-library dependencies are not supported in this platform." else echo "*** Warning: inter-library dependencies are not known to be supported." fi echo "*** All declared inter-library dependencies are being dropped." droppeddeps=yes ;; esac ;; esac versuffix=$versuffix_save major=$major_save release=$release_save libname=$libname_save name=$name_save case $host in *-*-rhapsody* | *-*-darwin1.[012]) # On Rhapsody replace the C library with the System framework newdeplibs=`$ECHO " $newdeplibs" | $SED 's/ -lc / System.ltframework /'` ;; esac if test yes = "$droppeddeps"; then if test yes = "$module"; then echo echo "*** Warning: libtool could not satisfy all declared inter-library" $ECHO "*** dependencies of module $libname. Therefore, libtool will create" echo "*** a static module, that should work as long as the dlopening" echo "*** application is linked with the -dlopen flag." if test -z "$global_symbol_pipe"; then echo echo "*** However, this would only work if libtool was able to extract symbol" echo "*** lists from a program, using 'nm' or equivalent, but libtool could" echo "*** not find such a program. So, this module is probably useless." echo "*** 'nm' from GNU binutils and a full rebuild may help." fi if test no = "$build_old_libs"; then oldlibs=$output_objdir/$libname.$libext build_libtool_libs=module build_old_libs=yes else build_libtool_libs=no fi else echo "*** The inter-library dependencies that have been dropped here will be" echo "*** automatically added whenever a program is linked with this library" echo "*** or is declared to -dlopen it." if test no = "$allow_undefined"; then echo echo "*** Since this library must not contain undefined symbols," echo "*** because either the platform does not support them or" echo "*** it was explicitly requested with -no-undefined," echo "*** libtool will only create a static version of it." if test no = "$build_old_libs"; then oldlibs=$output_objdir/$libname.$libext build_libtool_libs=module build_old_libs=yes else build_libtool_libs=no fi fi fi fi # Done checking deplibs! deplibs=$newdeplibs fi # Time to change all our "foo.ltframework" stuff back to "-framework foo" case $host in *-*-darwin*) newdeplibs=`$ECHO " $newdeplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` new_inherited_linker_flags=`$ECHO " $new_inherited_linker_flags" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` deplibs=`$ECHO " $deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` ;; esac # move library search paths that coincide with paths to not yet # installed libraries to the beginning of the library search list new_libs= for path in $notinst_path; do case " $new_libs " in *" -L$path/$objdir "*) ;; *) case " $deplibs " in *" -L$path/$objdir "*) func_append new_libs " -L$path/$objdir" ;; esac ;; esac done for deplib in $deplibs; do case $deplib in -L*) case " $new_libs " in *" $deplib "*) ;; *) func_append new_libs " $deplib" ;; esac ;; *) func_append new_libs " $deplib" ;; esac done deplibs=$new_libs # All the library-specific variables (install_libdir is set above). library_names= old_library= dlname= # Test again, we may have decided not to build it any more if test yes = "$build_libtool_libs"; then # Remove $wl instances when linking with ld. # FIXME: should test the right _cmds variable. case $archive_cmds in *\$LD\ *) wl= ;; esac if test yes = "$hardcode_into_libs"; then # Hardcode the library paths hardcode_libdirs= dep_rpath= rpath=$finalize_rpath test relink = "$opt_mode" || rpath=$compile_rpath$rpath for libdir in $rpath; do if test -n "$hardcode_libdir_flag_spec"; then if test -n "$hardcode_libdir_separator"; then func_replace_sysroot "$libdir" libdir=$func_replace_sysroot_result if test -z "$hardcode_libdirs"; then hardcode_libdirs=$libdir else # Just accumulate the unique libdirs. case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*) ;; *) func_append hardcode_libdirs "$hardcode_libdir_separator$libdir" ;; esac fi else eval flag=\"$hardcode_libdir_flag_spec\" func_append dep_rpath " $flag" fi elif test -n "$runpath_var"; then case "$perm_rpath " in *" $libdir "*) ;; *) func_append perm_rpath " $libdir" ;; esac fi done # Substitute the hardcoded libdirs into the rpath. if test -n "$hardcode_libdir_separator" && test -n "$hardcode_libdirs"; then libdir=$hardcode_libdirs eval "dep_rpath=\"$hardcode_libdir_flag_spec\"" fi if test -n "$runpath_var" && test -n "$perm_rpath"; then # We should set the runpath_var. rpath= for dir in $perm_rpath; do func_append rpath "$dir:" done eval "$runpath_var='$rpath\$$runpath_var'; export $runpath_var" fi test -n "$dep_rpath" && deplibs="$dep_rpath $deplibs" fi shlibpath=$finalize_shlibpath test relink = "$opt_mode" || shlibpath=$compile_shlibpath$shlibpath if test -n "$shlibpath"; then eval "$shlibpath_var='$shlibpath\$$shlibpath_var'; export $shlibpath_var" fi # Get the real and link names of the library. eval shared_ext=\"$shrext_cmds\" eval library_names=\"$library_names_spec\" set dummy $library_names shift realname=$1 shift if test -n "$soname_spec"; then eval soname=\"$soname_spec\" else soname=$realname fi if test -z "$dlname"; then dlname=$soname fi lib=$output_objdir/$realname linknames= for link do func_append linknames " $link" done # Use standard objects if they are pic test -z "$pic_flag" && libobjs=`$ECHO "$libobjs" | $SP2NL | $SED "$lo2o" | $NL2SP` test "X$libobjs" = "X " && libobjs= delfiles= if test -n "$export_symbols" && test -n "$include_expsyms"; then $opt_dry_run || cp "$export_symbols" "$output_objdir/$libname.uexp" export_symbols=$output_objdir/$libname.uexp func_append delfiles " $export_symbols" fi orig_export_symbols= case $host_os in cygwin* | mingw* | cegcc*) if test -n "$export_symbols" && test -z "$export_symbols_regex"; then # exporting using user supplied symfile func_dll_def_p "$export_symbols" || { # and it's NOT already a .def file. Must figure out # which of the given symbols are data symbols and tag # them as such. So, trigger use of export_symbols_cmds. # export_symbols gets reassigned inside the "prepare # the list of exported symbols" if statement, so the # include_expsyms logic still works. orig_export_symbols=$export_symbols export_symbols= always_export_symbols=yes } fi ;; esac # Prepare the list of exported symbols if test -z "$export_symbols"; then if test yes = "$always_export_symbols" || test -n "$export_symbols_regex"; then func_verbose "generating symbol list for '$libname.la'" export_symbols=$output_objdir/$libname.exp $opt_dry_run || $RM $export_symbols cmds=$export_symbols_cmds save_ifs=$IFS; IFS='~' for cmd1 in $cmds; do IFS=$save_ifs # Take the normal branch if the nm_file_list_spec branch # doesn't work or if tool conversion is not needed. case $nm_file_list_spec~$to_tool_file_cmd in *~func_convert_file_noop | *~func_convert_file_msys_to_w32 | ~*) try_normal_branch=yes eval cmd=\"$cmd1\" func_len " $cmd" len=$func_len_result ;; *) try_normal_branch=no ;; esac if test yes = "$try_normal_branch" \ && { test "$len" -lt "$max_cmd_len" \ || test "$max_cmd_len" -le -1; } then func_show_eval "$cmd" 'exit $?' skipped_export=false elif test -n "$nm_file_list_spec"; then func_basename "$output" output_la=$func_basename_result save_libobjs=$libobjs save_output=$output output=$output_objdir/$output_la.nm func_to_tool_file "$output" libobjs=$nm_file_list_spec$func_to_tool_file_result func_append delfiles " $output" func_verbose "creating $NM input file list: $output" for obj in $save_libobjs; do func_to_tool_file "$obj" $ECHO "$func_to_tool_file_result" done > "$output" eval cmd=\"$cmd1\" func_show_eval "$cmd" 'exit $?' output=$save_output libobjs=$save_libobjs skipped_export=false else # The command line is too long to execute in one step. func_verbose "using reloadable object file for export list..." skipped_export=: # Break out early, otherwise skipped_export may be # set to false by a later but shorter cmd. break fi done IFS=$save_ifs if test -n "$export_symbols_regex" && test : != "$skipped_export"; then func_show_eval '$EGREP -e "$export_symbols_regex" "$export_symbols" > "${export_symbols}T"' func_show_eval '$MV "${export_symbols}T" "$export_symbols"' fi fi fi if test -n "$export_symbols" && test -n "$include_expsyms"; then tmp_export_symbols=$export_symbols test -n "$orig_export_symbols" && tmp_export_symbols=$orig_export_symbols $opt_dry_run || eval '$ECHO "$include_expsyms" | $SP2NL >> "$tmp_export_symbols"' fi if test : != "$skipped_export" && test -n "$orig_export_symbols"; then # The given exports_symbols file has to be filtered, so filter it. func_verbose "filter symbol list for '$libname.la' to tag DATA exports" # FIXME: $output_objdir/$libname.filter potentially contains lots of # 's' commands, which not all seds can handle. GNU sed should be fine # though. Also, the filter scales superlinearly with the number of # global variables. join(1) would be nice here, but unfortunately # isn't a blessed tool. $opt_dry_run || $SED -e '/[ ,]DATA/!d;s,\(.*\)\([ \,].*\),s|^\1$|\1\2|,' < $export_symbols > $output_objdir/$libname.filter func_append delfiles " $export_symbols $output_objdir/$libname.filter" export_symbols=$output_objdir/$libname.def $opt_dry_run || $SED -f $output_objdir/$libname.filter < $orig_export_symbols > $export_symbols fi tmp_deplibs= for test_deplib in $deplibs; do case " $convenience " in *" $test_deplib "*) ;; *) func_append tmp_deplibs " $test_deplib" ;; esac done deplibs=$tmp_deplibs if test -n "$convenience"; then if test -n "$whole_archive_flag_spec" && test yes = "$compiler_needs_object" && test -z "$libobjs"; then # extract the archives, so we have objects to list. # TODO: could optimize this to just extract one archive. whole_archive_flag_spec= fi if test -n "$whole_archive_flag_spec"; then save_libobjs=$libobjs eval libobjs=\"\$libobjs $whole_archive_flag_spec\" test "X$libobjs" = "X " && libobjs= else gentop=$output_objdir/${outputname}x func_append generated " $gentop" func_extract_archives $gentop $convenience func_append libobjs " $func_extract_archives_result" test "X$libobjs" = "X " && libobjs= fi fi if test yes = "$thread_safe" && test -n "$thread_safe_flag_spec"; then eval flag=\"$thread_safe_flag_spec\" func_append linker_flags " $flag" fi # Make a backup of the uninstalled library when relinking if test relink = "$opt_mode"; then $opt_dry_run || eval '(cd $output_objdir && $RM ${realname}U && $MV $realname ${realname}U)' || exit $? fi # Do each of the archive commands. if test yes = "$module" && test -n "$module_cmds"; then if test -n "$export_symbols" && test -n "$module_expsym_cmds"; then eval test_cmds=\"$module_expsym_cmds\" cmds=$module_expsym_cmds else eval test_cmds=\"$module_cmds\" cmds=$module_cmds fi else if test -n "$export_symbols" && test -n "$archive_expsym_cmds"; then eval test_cmds=\"$archive_expsym_cmds\" cmds=$archive_expsym_cmds else eval test_cmds=\"$archive_cmds\" cmds=$archive_cmds fi fi if test : != "$skipped_export" && func_len " $test_cmds" && len=$func_len_result && test "$len" -lt "$max_cmd_len" || test "$max_cmd_len" -le -1; then : else # The command line is too long to link in one step, link piecewise # or, if using GNU ld and skipped_export is not :, use a linker # script. # Save the value of $output and $libobjs because we want to # use them later. If we have whole_archive_flag_spec, we # want to use save_libobjs as it was before # whole_archive_flag_spec was expanded, because we can't # assume the linker understands whole_archive_flag_spec. # This may have to be revisited, in case too many # convenience libraries get linked in and end up exceeding # the spec. if test -z "$convenience" || test -z "$whole_archive_flag_spec"; then save_libobjs=$libobjs fi save_output=$output func_basename "$output" output_la=$func_basename_result # Clear the reloadable object creation command queue and # initialize k to one. test_cmds= concat_cmds= objlist= last_robj= k=1 if test -n "$save_libobjs" && test : != "$skipped_export" && test yes = "$with_gnu_ld"; then output=$output_objdir/$output_la.lnkscript func_verbose "creating GNU ld script: $output" echo 'INPUT (' > $output for obj in $save_libobjs do func_to_tool_file "$obj" $ECHO "$func_to_tool_file_result" >> $output done echo ')' >> $output func_append delfiles " $output" func_to_tool_file "$output" output=$func_to_tool_file_result elif test -n "$save_libobjs" && test : != "$skipped_export" && test -n "$file_list_spec"; then output=$output_objdir/$output_la.lnk func_verbose "creating linker input file list: $output" : > $output set x $save_libobjs shift firstobj= if test yes = "$compiler_needs_object"; then firstobj="$1 " shift fi for obj do func_to_tool_file "$obj" $ECHO "$func_to_tool_file_result" >> $output done func_append delfiles " $output" func_to_tool_file "$output" output=$firstobj\"$file_list_spec$func_to_tool_file_result\" else if test -n "$save_libobjs"; then func_verbose "creating reloadable object files..." output=$output_objdir/$output_la-$k.$objext eval test_cmds=\"$reload_cmds\" func_len " $test_cmds" len0=$func_len_result len=$len0 # Loop over the list of objects to be linked. for obj in $save_libobjs do func_len " $obj" func_arith $len + $func_len_result len=$func_arith_result if test -z "$objlist" || test "$len" -lt "$max_cmd_len"; then func_append objlist " $obj" else # The command $test_cmds is almost too long, add a # command to the queue. if test 1 -eq "$k"; then # The first file doesn't have a previous command to add. reload_objs=$objlist eval concat_cmds=\"$reload_cmds\" else # All subsequent reloadable object files will link in # the last one created. reload_objs="$objlist $last_robj" eval concat_cmds=\"\$concat_cmds~$reload_cmds~\$RM $last_robj\" fi last_robj=$output_objdir/$output_la-$k.$objext func_arith $k + 1 k=$func_arith_result output=$output_objdir/$output_la-$k.$objext objlist=" $obj" func_len " $last_robj" func_arith $len0 + $func_len_result len=$func_arith_result fi done # Handle the remaining objects by creating one last # reloadable object file. All subsequent reloadable object # files will link in the last one created. test -z "$concat_cmds" || concat_cmds=$concat_cmds~ reload_objs="$objlist $last_robj" eval concat_cmds=\"\$concat_cmds$reload_cmds\" if test -n "$last_robj"; then eval concat_cmds=\"\$concat_cmds~\$RM $last_robj\" fi func_append delfiles " $output" else output= fi ${skipped_export-false} && { func_verbose "generating symbol list for '$libname.la'" export_symbols=$output_objdir/$libname.exp $opt_dry_run || $RM $export_symbols libobjs=$output # Append the command to create the export file. test -z "$concat_cmds" || concat_cmds=$concat_cmds~ eval concat_cmds=\"\$concat_cmds$export_symbols_cmds\" if test -n "$last_robj"; then eval concat_cmds=\"\$concat_cmds~\$RM $last_robj\" fi } test -n "$save_libobjs" && func_verbose "creating a temporary reloadable object file: $output" # Loop through the commands generated above and execute them. save_ifs=$IFS; IFS='~' for cmd in $concat_cmds; do IFS=$save_ifs $opt_quiet || { func_quote_for_expand "$cmd" eval "func_echo $func_quote_for_expand_result" } $opt_dry_run || eval "$cmd" || { lt_exit=$? # Restore the uninstalled library and exit if test relink = "$opt_mode"; then ( cd "$output_objdir" && \ $RM "${realname}T" && \ $MV "${realname}U" "$realname" ) fi exit $lt_exit } done IFS=$save_ifs if test -n "$export_symbols_regex" && ${skipped_export-false}; then func_show_eval '$EGREP -e "$export_symbols_regex" "$export_symbols" > "${export_symbols}T"' func_show_eval '$MV "${export_symbols}T" "$export_symbols"' fi fi ${skipped_export-false} && { if test -n "$export_symbols" && test -n "$include_expsyms"; then tmp_export_symbols=$export_symbols test -n "$orig_export_symbols" && tmp_export_symbols=$orig_export_symbols $opt_dry_run || eval '$ECHO "$include_expsyms" | $SP2NL >> "$tmp_export_symbols"' fi if test -n "$orig_export_symbols"; then # The given exports_symbols file has to be filtered, so filter it. func_verbose "filter symbol list for '$libname.la' to tag DATA exports" # FIXME: $output_objdir/$libname.filter potentially contains lots of # 's' commands, which not all seds can handle. GNU sed should be fine # though. Also, the filter scales superlinearly with the number of # global variables. join(1) would be nice here, but unfortunately # isn't a blessed tool. $opt_dry_run || $SED -e '/[ ,]DATA/!d;s,\(.*\)\([ \,].*\),s|^\1$|\1\2|,' < $export_symbols > $output_objdir/$libname.filter func_append delfiles " $export_symbols $output_objdir/$libname.filter" export_symbols=$output_objdir/$libname.def $opt_dry_run || $SED -f $output_objdir/$libname.filter < $orig_export_symbols > $export_symbols fi } libobjs=$output # Restore the value of output. output=$save_output if test -n "$convenience" && test -n "$whole_archive_flag_spec"; then eval libobjs=\"\$libobjs $whole_archive_flag_spec\" test "X$libobjs" = "X " && libobjs= fi # Expand the library linking commands again to reset the # value of $libobjs for piecewise linking. # Do each of the archive commands. if test yes = "$module" && test -n "$module_cmds"; then if test -n "$export_symbols" && test -n "$module_expsym_cmds"; then cmds=$module_expsym_cmds else cmds=$module_cmds fi else if test -n "$export_symbols" && test -n "$archive_expsym_cmds"; then cmds=$archive_expsym_cmds else cmds=$archive_cmds fi fi fi if test -n "$delfiles"; then # Append the command to remove temporary files to $cmds. eval cmds=\"\$cmds~\$RM $delfiles\" fi # Add any objects from preloaded convenience libraries if test -n "$dlprefiles"; then gentop=$output_objdir/${outputname}x func_append generated " $gentop" func_extract_archives $gentop $dlprefiles func_append libobjs " $func_extract_archives_result" test "X$libobjs" = "X " && libobjs= fi save_ifs=$IFS; IFS='~' for cmd in $cmds; do IFS=$sp$nl eval cmd=\"$cmd\" IFS=$save_ifs $opt_quiet || { func_quote_for_expand "$cmd" eval "func_echo $func_quote_for_expand_result" } $opt_dry_run || eval "$cmd" || { lt_exit=$? # Restore the uninstalled library and exit if test relink = "$opt_mode"; then ( cd "$output_objdir" && \ $RM "${realname}T" && \ $MV "${realname}U" "$realname" ) fi exit $lt_exit } done IFS=$save_ifs # Restore the uninstalled library and exit if test relink = "$opt_mode"; then $opt_dry_run || eval '(cd $output_objdir && $RM ${realname}T && $MV $realname ${realname}T && $MV ${realname}U $realname)' || exit $? if test -n "$convenience"; then if test -z "$whole_archive_flag_spec"; then func_show_eval '${RM}r "$gentop"' fi fi exit $EXIT_SUCCESS fi # Create links to the real library. for linkname in $linknames; do if test "$realname" != "$linkname"; then func_show_eval '(cd "$output_objdir" && $RM "$linkname" && $LN_S "$realname" "$linkname")' 'exit $?' fi done # If -module or -export-dynamic was specified, set the dlname. if test yes = "$module" || test yes = "$export_dynamic"; then # On all known operating systems, these are identical. dlname=$soname fi fi ;; obj) if test -n "$dlfiles$dlprefiles" || test no != "$dlself"; then func_warning "'-dlopen' is ignored for objects" fi case " $deplibs" in *\ -l* | *\ -L*) func_warning "'-l' and '-L' are ignored for objects" ;; esac test -n "$rpath" && \ func_warning "'-rpath' is ignored for objects" test -n "$xrpath" && \ func_warning "'-R' is ignored for objects" test -n "$vinfo" && \ func_warning "'-version-info' is ignored for objects" test -n "$release" && \ func_warning "'-release' is ignored for objects" case $output in *.lo) test -n "$objs$old_deplibs" && \ func_fatal_error "cannot build library object '$output' from non-libtool objects" libobj=$output func_lo2o "$libobj" obj=$func_lo2o_result ;; *) libobj= obj=$output ;; esac # Delete the old objects. $opt_dry_run || $RM $obj $libobj # Objects from convenience libraries. This assumes # single-version convenience libraries. Whenever we create # different ones for PIC/non-PIC, this we'll have to duplicate # the extraction. reload_conv_objs= gentop= # if reload_cmds runs $LD directly, get rid of -Wl from # whole_archive_flag_spec and hope we can get by with turning comma # into space. case $reload_cmds in *\$LD[\ \$]*) wl= ;; esac if test -n "$convenience"; then if test -n "$whole_archive_flag_spec"; then eval tmp_whole_archive_flags=\"$whole_archive_flag_spec\" test -n "$wl" || tmp_whole_archive_flags=`$ECHO "$tmp_whole_archive_flags" | $SED 's|,| |g'` reload_conv_objs=$reload_objs\ $tmp_whole_archive_flags else gentop=$output_objdir/${obj}x func_append generated " $gentop" func_extract_archives $gentop $convenience reload_conv_objs="$reload_objs $func_extract_archives_result" fi fi # If we're not building shared, we need to use non_pic_objs test yes = "$build_libtool_libs" || libobjs=$non_pic_objects # Create the old-style object. reload_objs=$objs$old_deplibs' '`$ECHO "$libobjs" | $SP2NL | $SED "/\.$libext$/d; /\.lib$/d; $lo2o" | $NL2SP`' '$reload_conv_objs output=$obj func_execute_cmds "$reload_cmds" 'exit $?' # Exit if we aren't doing a library object file. if test -z "$libobj"; then if test -n "$gentop"; then func_show_eval '${RM}r "$gentop"' fi exit $EXIT_SUCCESS fi test yes = "$build_libtool_libs" || { if test -n "$gentop"; then func_show_eval '${RM}r "$gentop"' fi # Create an invalid libtool object if no PIC, so that we don't # accidentally link it into a program. # $show "echo timestamp > $libobj" # $opt_dry_run || eval "echo timestamp > $libobj" || exit $? exit $EXIT_SUCCESS } if test -n "$pic_flag" || test default != "$pic_mode"; then # Only do commands if we really have different PIC objects. reload_objs="$libobjs $reload_conv_objs" output=$libobj func_execute_cmds "$reload_cmds" 'exit $?' fi if test -n "$gentop"; then func_show_eval '${RM}r "$gentop"' fi exit $EXIT_SUCCESS ;; prog) case $host in *cygwin*) func_stripname '' '.exe' "$output" output=$func_stripname_result.exe;; esac test -n "$vinfo" && \ func_warning "'-version-info' is ignored for programs" test -n "$release" && \ func_warning "'-release' is ignored for programs" $preload \ && test unknown,unknown,unknown = "$dlopen_support,$dlopen_self,$dlopen_self_static" \ && func_warning "'LT_INIT([dlopen])' not used. Assuming no dlopen support." case $host in *-*-rhapsody* | *-*-darwin1.[012]) # On Rhapsody replace the C library is the System framework compile_deplibs=`$ECHO " $compile_deplibs" | $SED 's/ -lc / System.ltframework /'` finalize_deplibs=`$ECHO " $finalize_deplibs" | $SED 's/ -lc / System.ltframework /'` ;; esac case $host in *-*-darwin*) # Don't allow lazy linking, it breaks C++ global constructors # But is supposedly fixed on 10.4 or later (yay!). if test CXX = "$tagname"; then case ${MACOSX_DEPLOYMENT_TARGET-10.0} in 10.[0123]) func_append compile_command " $wl-bind_at_load" func_append finalize_command " $wl-bind_at_load" ;; esac fi # Time to change all our "foo.ltframework" stuff back to "-framework foo" compile_deplibs=`$ECHO " $compile_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` finalize_deplibs=`$ECHO " $finalize_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'` ;; esac # move library search paths that coincide with paths to not yet # installed libraries to the beginning of the library search list new_libs= for path in $notinst_path; do case " $new_libs " in *" -L$path/$objdir "*) ;; *) case " $compile_deplibs " in *" -L$path/$objdir "*) func_append new_libs " -L$path/$objdir" ;; esac ;; esac done for deplib in $compile_deplibs; do case $deplib in -L*) case " $new_libs " in *" $deplib "*) ;; *) func_append new_libs " $deplib" ;; esac ;; *) func_append new_libs " $deplib" ;; esac done compile_deplibs=$new_libs func_append compile_command " $compile_deplibs" func_append finalize_command " $finalize_deplibs" if test -n "$rpath$xrpath"; then # If the user specified any rpath flags, then add them. for libdir in $rpath $xrpath; do # This is the magic to use -rpath. case "$finalize_rpath " in *" $libdir "*) ;; *) func_append finalize_rpath " $libdir" ;; esac done fi # Now hardcode the library paths rpath= hardcode_libdirs= for libdir in $compile_rpath $finalize_rpath; do if test -n "$hardcode_libdir_flag_spec"; then if test -n "$hardcode_libdir_separator"; then if test -z "$hardcode_libdirs"; then hardcode_libdirs=$libdir else # Just accumulate the unique libdirs. case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*) ;; *) func_append hardcode_libdirs "$hardcode_libdir_separator$libdir" ;; esac fi else eval flag=\"$hardcode_libdir_flag_spec\" func_append rpath " $flag" fi elif test -n "$runpath_var"; then case "$perm_rpath " in *" $libdir "*) ;; *) func_append perm_rpath " $libdir" ;; esac fi case $host in *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*) testbindir=`$ECHO "$libdir" | $SED -e 's*/lib$*/bin*'` case :$dllsearchpath: in *":$libdir:"*) ;; ::) dllsearchpath=$libdir;; *) func_append dllsearchpath ":$libdir";; esac case :$dllsearchpath: in *":$testbindir:"*) ;; ::) dllsearchpath=$testbindir;; *) func_append dllsearchpath ":$testbindir";; esac ;; esac done # Substitute the hardcoded libdirs into the rpath. if test -n "$hardcode_libdir_separator" && test -n "$hardcode_libdirs"; then libdir=$hardcode_libdirs eval rpath=\" $hardcode_libdir_flag_spec\" fi compile_rpath=$rpath rpath= hardcode_libdirs= for libdir in $finalize_rpath; do if test -n "$hardcode_libdir_flag_spec"; then if test -n "$hardcode_libdir_separator"; then if test -z "$hardcode_libdirs"; then hardcode_libdirs=$libdir else # Just accumulate the unique libdirs. case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*) ;; *) func_append hardcode_libdirs "$hardcode_libdir_separator$libdir" ;; esac fi else eval flag=\"$hardcode_libdir_flag_spec\" func_append rpath " $flag" fi elif test -n "$runpath_var"; then case "$finalize_perm_rpath " in *" $libdir "*) ;; *) func_append finalize_perm_rpath " $libdir" ;; esac fi done # Substitute the hardcoded libdirs into the rpath. if test -n "$hardcode_libdir_separator" && test -n "$hardcode_libdirs"; then libdir=$hardcode_libdirs eval rpath=\" $hardcode_libdir_flag_spec\" fi finalize_rpath=$rpath if test -n "$libobjs" && test yes = "$build_old_libs"; then # Transform all the library objects into standard objects. compile_command=`$ECHO "$compile_command" | $SP2NL | $SED "$lo2o" | $NL2SP` finalize_command=`$ECHO "$finalize_command" | $SP2NL | $SED "$lo2o" | $NL2SP` fi func_generate_dlsyms "$outputname" "@PROGRAM@" false # template prelinking step if test -n "$prelink_cmds"; then func_execute_cmds "$prelink_cmds" 'exit $?' fi wrappers_required=: case $host in *cegcc* | *mingw32ce*) # Disable wrappers for cegcc and mingw32ce hosts, we are cross compiling anyway. wrappers_required=false ;; *cygwin* | *mingw* ) test yes = "$build_libtool_libs" || wrappers_required=false ;; *) if test no = "$need_relink" || test yes != "$build_libtool_libs"; then wrappers_required=false fi ;; esac $wrappers_required || { # Replace the output file specification. compile_command=`$ECHO "$compile_command" | $SED 's%@OUTPUT@%'"$output"'%g'` link_command=$compile_command$compile_rpath # We have no uninstalled library dependencies, so finalize right now. exit_status=0 func_show_eval "$link_command" 'exit_status=$?' if test -n "$postlink_cmds"; then func_to_tool_file "$output" postlink_cmds=`func_echo_all "$postlink_cmds" | $SED -e 's%@OUTPUT@%'"$output"'%g' -e 's%@TOOL_OUTPUT@%'"$func_to_tool_file_result"'%g'` func_execute_cmds "$postlink_cmds" 'exit $?' fi # Delete the generated files. if test -f "$output_objdir/${outputname}S.$objext"; then func_show_eval '$RM "$output_objdir/${outputname}S.$objext"' fi exit $exit_status } if test -n "$compile_shlibpath$finalize_shlibpath"; then compile_command="$shlibpath_var=\"$compile_shlibpath$finalize_shlibpath\$$shlibpath_var\" $compile_command" fi if test -n "$finalize_shlibpath"; then finalize_command="$shlibpath_var=\"$finalize_shlibpath\$$shlibpath_var\" $finalize_command" fi compile_var= finalize_var= if test -n "$runpath_var"; then if test -n "$perm_rpath"; then # We should set the runpath_var. rpath= for dir in $perm_rpath; do func_append rpath "$dir:" done compile_var="$runpath_var=\"$rpath\$$runpath_var\" " fi if test -n "$finalize_perm_rpath"; then # We should set the runpath_var. rpath= for dir in $finalize_perm_rpath; do func_append rpath "$dir:" done finalize_var="$runpath_var=\"$rpath\$$runpath_var\" " fi fi if test yes = "$no_install"; then # We don't need to create a wrapper script. link_command=$compile_var$compile_command$compile_rpath # Replace the output file specification. link_command=`$ECHO "$link_command" | $SED 's%@OUTPUT@%'"$output"'%g'` # Delete the old output file. $opt_dry_run || $RM $output # Link the executable and exit func_show_eval "$link_command" 'exit $?' if test -n "$postlink_cmds"; then func_to_tool_file "$output" postlink_cmds=`func_echo_all "$postlink_cmds" | $SED -e 's%@OUTPUT@%'"$output"'%g' -e 's%@TOOL_OUTPUT@%'"$func_to_tool_file_result"'%g'` func_execute_cmds "$postlink_cmds" 'exit $?' fi exit $EXIT_SUCCESS fi case $hardcode_action,$fast_install in relink,*) # Fast installation is not supported link_command=$compile_var$compile_command$compile_rpath relink_command=$finalize_var$finalize_command$finalize_rpath func_warning "this platform does not like uninstalled shared libraries" func_warning "'$output' will be relinked during installation" ;; *,yes) link_command=$finalize_var$compile_command$finalize_rpath relink_command=`$ECHO "$compile_var$compile_command$compile_rpath" | $SED 's%@OUTPUT@%\$progdir/\$file%g'` ;; *,no) link_command=$compile_var$compile_command$compile_rpath relink_command=$finalize_var$finalize_command$finalize_rpath ;; *,needless) link_command=$finalize_var$compile_command$finalize_rpath relink_command= ;; esac # Replace the output file specification. link_command=`$ECHO "$link_command" | $SED 's%@OUTPUT@%'"$output_objdir/$outputname"'%g'` # Delete the old output files. $opt_dry_run || $RM $output $output_objdir/$outputname $output_objdir/lt-$outputname func_show_eval "$link_command" 'exit $?' if test -n "$postlink_cmds"; then func_to_tool_file "$output_objdir/$outputname" postlink_cmds=`func_echo_all "$postlink_cmds" | $SED -e 's%@OUTPUT@%'"$output_objdir/$outputname"'%g' -e 's%@TOOL_OUTPUT@%'"$func_to_tool_file_result"'%g'` func_execute_cmds "$postlink_cmds" 'exit $?' fi # Now create the wrapper script. func_verbose "creating $output" # Quote the relink command for shipping. if test -n "$relink_command"; then # Preserve any variables that may affect compiler behavior for var in $variables_saved_for_relink; do if eval test -z \"\${$var+set}\"; then relink_command="{ test -z \"\${$var+set}\" || $lt_unset $var || { $var=; export $var; }; }; $relink_command" elif eval var_value=\$$var; test -z "$var_value"; then relink_command="$var=; export $var; $relink_command" else func_quote_for_eval "$var_value" relink_command="$var=$func_quote_for_eval_result; export $var; $relink_command" fi done relink_command="(cd `pwd`; $relink_command)" relink_command=`$ECHO "$relink_command" | $SED "$sed_quote_subst"` fi # Only actually do things if not in dry run mode. $opt_dry_run || { # win32 will think the script is a binary if it has # a .exe suffix, so we strip it off here. case $output in *.exe) func_stripname '' '.exe' "$output" output=$func_stripname_result ;; esac # test for cygwin because mv fails w/o .exe extensions case $host in *cygwin*) exeext=.exe func_stripname '' '.exe' "$outputname" outputname=$func_stripname_result ;; *) exeext= ;; esac case $host in *cygwin* | *mingw* ) func_dirname_and_basename "$output" "" "." output_name=$func_basename_result output_path=$func_dirname_result cwrappersource=$output_path/$objdir/lt-$output_name.c cwrapper=$output_path/$output_name.exe $RM $cwrappersource $cwrapper trap "$RM $cwrappersource $cwrapper; exit $EXIT_FAILURE" 1 2 15 func_emit_cwrapperexe_src > $cwrappersource # The wrapper executable is built using the $host compiler, # because it contains $host paths and files. 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Create each directory DIR (with mode MODE, if specified), including all leading file name components. Report bugs to ." # process command line arguments while test $# -gt 0 ; do case $1 in -h | --help | --h*) # -h for help echo "$usage" exit $? ;; -m) # -m PERM arg shift test $# -eq 0 && { echo "$usage" 1>&2; exit 1; } dirmode=$1 shift ;; --version) echo "$0 $scriptversion" exit $? ;; --) # stop option processing shift break ;; -*) # unknown option echo "$usage" 1>&2 exit 1 ;; *) # first non-opt arg break ;; esac done for file do if test -d "$file"; then shift else break fi done case $# in 0) exit 0 ;; esac # Solaris 8's mkdir -p isn't thread-safe. If you mkdir -p a/b and # mkdir -p a/c at the same time, both will detect that a is missing, # one will create a, then the other will try to create a and die with # a "File exists" error. This is a problem when calling mkinstalldirs # from a parallel make. We use --version in the probe to restrict # ourselves to GNU mkdir, which is thread-safe. case $dirmode in '') if mkdir -p --version . >/dev/null 2>&1 && test ! -d ./--version; then echo "mkdir -p -- $*" exec mkdir -p -- "$@" else # On NextStep and OpenStep, the 'mkdir' command does not # recognize any option. It will interpret all options as # directories to create, and then abort because '.' already # exists. test -d ./-p && rmdir ./-p test -d ./--version && rmdir ./--version fi ;; *) if mkdir -m "$dirmode" -p --version . >/dev/null 2>&1 && test ! -d ./--version; then echo "mkdir -m $dirmode -p -- $*" exec mkdir -m "$dirmode" -p -- "$@" else # Clean up after NextStep and OpenStep mkdir. for d in ./-m ./-p ./--version "./$dirmode"; do test -d $d && rmdir $d done fi ;; esac for file do case $file in /*) pathcomp=/ ;; *) pathcomp= ;; esac oIFS=$IFS IFS=/ set fnord $file shift IFS=$oIFS for d do test "x$d" = x && continue pathcomp=$pathcomp$d case $pathcomp in -*) pathcomp=./$pathcomp ;; esac if test ! -d "$pathcomp"; then echo "mkdir $pathcomp" mkdir "$pathcomp" || lasterr=$? if test ! -d "$pathcomp"; then errstatus=$lasterr else if test ! -z "$dirmode"; then echo "chmod $dirmode $pathcomp" lasterr= chmod "$dirmode" "$pathcomp" || lasterr=$? if test ! -z "$lasterr"; then errstatus=$lasterr fi fi fi fi pathcomp=$pathcomp/ done done exit $errstatus # Local Variables: # mode: shell-script # sh-indentation: 2 # eval: (add-hook 'before-save-hook 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-time-zone: "UTC0" # time-stamp-end: "; # UTC" # End: libev-4.33/ev.c0000644000000000000000000045025513634411664010234 00000000000000/* * libev event processing core, watcher management * * Copyright (c) 2007-2019 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ /* this big block deduces configuration from config.h */ #ifndef EV_STANDALONE # ifdef EV_CONFIG_H # include EV_CONFIG_H # else # include "config.h" # endif # if HAVE_FLOOR # ifndef EV_USE_FLOOR # define EV_USE_FLOOR 1 # endif # endif # if HAVE_CLOCK_SYSCALL # ifndef EV_USE_CLOCK_SYSCALL # define EV_USE_CLOCK_SYSCALL 1 # ifndef EV_USE_REALTIME # define EV_USE_REALTIME 0 # endif # ifndef EV_USE_MONOTONIC # define EV_USE_MONOTONIC 1 # endif # endif # elif !defined EV_USE_CLOCK_SYSCALL # define EV_USE_CLOCK_SYSCALL 0 # endif # if HAVE_CLOCK_GETTIME # ifndef EV_USE_MONOTONIC # define EV_USE_MONOTONIC 1 # endif # ifndef EV_USE_REALTIME # define EV_USE_REALTIME 0 # endif # else # ifndef EV_USE_MONOTONIC # define EV_USE_MONOTONIC 0 # endif # ifndef EV_USE_REALTIME # define EV_USE_REALTIME 0 # endif # endif # if HAVE_NANOSLEEP # ifndef EV_USE_NANOSLEEP # define EV_USE_NANOSLEEP EV_FEATURE_OS # endif # else # undef EV_USE_NANOSLEEP # define EV_USE_NANOSLEEP 0 # endif # if HAVE_SELECT && HAVE_SYS_SELECT_H # ifndef EV_USE_SELECT # define EV_USE_SELECT EV_FEATURE_BACKENDS # endif # else # undef EV_USE_SELECT # define EV_USE_SELECT 0 # endif # if HAVE_POLL && HAVE_POLL_H # ifndef EV_USE_POLL # define EV_USE_POLL EV_FEATURE_BACKENDS # endif # else # undef EV_USE_POLL # define EV_USE_POLL 0 # endif # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H # ifndef EV_USE_EPOLL # define EV_USE_EPOLL EV_FEATURE_BACKENDS # endif # else # undef EV_USE_EPOLL # define EV_USE_EPOLL 0 # endif # if HAVE_LINUX_AIO_ABI_H # ifndef EV_USE_LINUXAIO # define EV_USE_LINUXAIO 0 /* was: EV_FEATURE_BACKENDS, always off by default */ # endif # else # undef EV_USE_LINUXAIO # define EV_USE_LINUXAIO 0 # endif # if HAVE_LINUX_FS_H && HAVE_SYS_TIMERFD_H && HAVE_KERNEL_RWF_T # ifndef EV_USE_IOURING # define EV_USE_IOURING EV_FEATURE_BACKENDS # endif # else # undef EV_USE_IOURING # define EV_USE_IOURING 0 # endif # if HAVE_KQUEUE && HAVE_SYS_EVENT_H # ifndef EV_USE_KQUEUE # define EV_USE_KQUEUE EV_FEATURE_BACKENDS # endif # else # undef EV_USE_KQUEUE # define EV_USE_KQUEUE 0 # endif # if HAVE_PORT_H && HAVE_PORT_CREATE # ifndef EV_USE_PORT # define EV_USE_PORT EV_FEATURE_BACKENDS # endif # else # undef EV_USE_PORT # define EV_USE_PORT 0 # endif # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H # ifndef EV_USE_INOTIFY # define EV_USE_INOTIFY EV_FEATURE_OS # endif # else # undef EV_USE_INOTIFY # define EV_USE_INOTIFY 0 # endif # if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H # ifndef EV_USE_SIGNALFD # define EV_USE_SIGNALFD EV_FEATURE_OS # endif # else # undef EV_USE_SIGNALFD # define EV_USE_SIGNALFD 0 # endif # if HAVE_EVENTFD # ifndef EV_USE_EVENTFD # define EV_USE_EVENTFD EV_FEATURE_OS # endif # else # undef EV_USE_EVENTFD # define EV_USE_EVENTFD 0 # endif # if HAVE_SYS_TIMERFD_H # ifndef EV_USE_TIMERFD # define EV_USE_TIMERFD EV_FEATURE_OS # endif # else # undef EV_USE_TIMERFD # define EV_USE_TIMERFD 0 # endif #endif /* OS X, in its infinite idiocy, actually HARDCODES * a limit of 1024 into their select. Where people have brains, * OS X engineers apparently have a vacuum. Or maybe they were * ordered to have a vacuum, or they do anything for money. * This might help. Or not. * Note that this must be defined early, as other include files * will rely on this define as well. */ #define _DARWIN_UNLIMITED_SELECT 1 #include #include #include #include #include #include #include #include #include #include #include #ifdef EV_H # include EV_H #else # include "ev.h" #endif #if EV_NO_THREADS # undef EV_NO_SMP # define EV_NO_SMP 1 # undef ECB_NO_THREADS # define ECB_NO_THREADS 1 #endif #if EV_NO_SMP # undef EV_NO_SMP # define ECB_NO_SMP 1 #endif #ifndef _WIN32 # include # include # include #else # include # define WIN32_LEAN_AND_MEAN # include # include # ifndef EV_SELECT_IS_WINSOCKET # define EV_SELECT_IS_WINSOCKET 1 # endif # undef EV_AVOID_STDIO #endif /* this block tries to deduce configuration from header-defined symbols and defaults */ /* try to deduce the maximum number of signals on this platform */ #if defined EV_NSIG /* use what's provided */ #elif defined NSIG # define EV_NSIG (NSIG) #elif defined _NSIG # define EV_NSIG (_NSIG) #elif defined SIGMAX # define EV_NSIG (SIGMAX+1) #elif defined SIG_MAX # define EV_NSIG (SIG_MAX+1) #elif defined _SIG_MAX # define EV_NSIG (_SIG_MAX+1) #elif defined MAXSIG # define EV_NSIG (MAXSIG+1) #elif defined MAX_SIG # define EV_NSIG (MAX_SIG+1) #elif defined SIGARRAYSIZE # define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ #elif defined _sys_nsig # define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ #else # define EV_NSIG (8 * sizeof (sigset_t) + 1) #endif #ifndef EV_USE_FLOOR # define EV_USE_FLOOR 0 #endif #ifndef EV_USE_CLOCK_SYSCALL # if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17 # define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS # else # define EV_USE_CLOCK_SYSCALL 0 # endif #endif #if !(_POSIX_TIMERS > 0) # ifndef EV_USE_MONOTONIC # define EV_USE_MONOTONIC 0 # endif # ifndef EV_USE_REALTIME # define EV_USE_REALTIME 0 # endif #endif #ifndef EV_USE_MONOTONIC # if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0 # define EV_USE_MONOTONIC EV_FEATURE_OS # else # define EV_USE_MONOTONIC 0 # endif #endif #ifndef EV_USE_REALTIME # define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL #endif #ifndef EV_USE_NANOSLEEP # if _POSIX_C_SOURCE >= 199309L # define EV_USE_NANOSLEEP EV_FEATURE_OS # else # define EV_USE_NANOSLEEP 0 # endif #endif #ifndef EV_USE_SELECT # define EV_USE_SELECT EV_FEATURE_BACKENDS #endif #ifndef EV_USE_POLL # ifdef _WIN32 # define EV_USE_POLL 0 # else # define EV_USE_POLL EV_FEATURE_BACKENDS # endif #endif #ifndef EV_USE_EPOLL # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) # define EV_USE_EPOLL EV_FEATURE_BACKENDS # else # define EV_USE_EPOLL 0 # endif #endif #ifndef EV_USE_KQUEUE # define EV_USE_KQUEUE 0 #endif #ifndef EV_USE_PORT # define EV_USE_PORT 0 #endif #ifndef EV_USE_LINUXAIO # if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */ # define EV_USE_LINUXAIO 0 /* was: 1, always off by default */ # else # define EV_USE_LINUXAIO 0 # endif #endif #ifndef EV_USE_IOURING # if __linux /* later checks might disable again */ # define EV_USE_IOURING 1 # else # define EV_USE_IOURING 0 # endif #endif #ifndef EV_USE_INOTIFY # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) # define EV_USE_INOTIFY EV_FEATURE_OS # else # define EV_USE_INOTIFY 0 # endif #endif #ifndef EV_PID_HASHSIZE # define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1 #endif #ifndef EV_INOTIFY_HASHSIZE # define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1 #endif #ifndef EV_USE_EVENTFD # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) # define EV_USE_EVENTFD EV_FEATURE_OS # else # define EV_USE_EVENTFD 0 # endif #endif #ifndef EV_USE_SIGNALFD # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) # define EV_USE_SIGNALFD EV_FEATURE_OS # else # define EV_USE_SIGNALFD 0 # endif #endif #ifndef EV_USE_TIMERFD # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 8)) # define EV_USE_TIMERFD EV_FEATURE_OS # else # define EV_USE_TIMERFD 0 # endif #endif #if 0 /* debugging */ # define EV_VERIFY 3 # define EV_USE_4HEAP 1 # define EV_HEAP_CACHE_AT 1 #endif #ifndef EV_VERIFY # define EV_VERIFY (EV_FEATURE_API ? 1 : 0) #endif #ifndef EV_USE_4HEAP # define EV_USE_4HEAP EV_FEATURE_DATA #endif #ifndef EV_HEAP_CACHE_AT # define EV_HEAP_CACHE_AT EV_FEATURE_DATA #endif #ifdef __ANDROID__ /* supposedly, android doesn't typedef fd_mask */ # undef EV_USE_SELECT # define EV_USE_SELECT 0 /* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */ # undef EV_USE_CLOCK_SYSCALL # define EV_USE_CLOCK_SYSCALL 0 #endif /* aix's poll.h seems to cause lots of trouble */ #ifdef _AIX /* AIX has a completely broken poll.h header */ # undef EV_USE_POLL # define EV_USE_POLL 0 #endif /* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ /* which makes programs even slower. might work on other unices, too. */ #if EV_USE_CLOCK_SYSCALL # include # ifdef SYS_clock_gettime # define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) # undef EV_USE_MONOTONIC # define EV_USE_MONOTONIC 1 # define EV_NEED_SYSCALL 1 # else # undef EV_USE_CLOCK_SYSCALL # define EV_USE_CLOCK_SYSCALL 0 # endif #endif /* this block fixes any misconfiguration where we know we run into trouble otherwise */ #ifndef CLOCK_MONOTONIC # undef EV_USE_MONOTONIC # define EV_USE_MONOTONIC 0 #endif #ifndef CLOCK_REALTIME # undef EV_USE_REALTIME # define EV_USE_REALTIME 0 #endif #if !EV_STAT_ENABLE # undef EV_USE_INOTIFY # define EV_USE_INOTIFY 0 #endif #if __linux && EV_USE_IOURING # include # if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0) # undef EV_USE_IOURING # define EV_USE_IOURING 0 # endif #endif #if !EV_USE_NANOSLEEP /* hp-ux has it in sys/time.h, which we unconditionally include above */ # if !defined _WIN32 && !defined __hpux # include # endif #endif #if EV_USE_LINUXAIO # include # if SYS_io_getevents && EV_USE_EPOLL /* linuxaio backend requires epoll backend */ # define EV_NEED_SYSCALL 1 # else # undef EV_USE_LINUXAIO # define EV_USE_LINUXAIO 0 # endif #endif #if EV_USE_IOURING # include # if !SYS_io_uring_setup && __linux && !__alpha # define SYS_io_uring_setup 425 # define SYS_io_uring_enter 426 # define SYS_io_uring_wregister 427 # endif # if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */ # define EV_NEED_SYSCALL 1 # else # undef EV_USE_IOURING # define EV_USE_IOURING 0 # endif #endif #if EV_USE_INOTIFY # include # include /* some very old inotify.h headers don't have IN_DONT_FOLLOW */ # ifndef IN_DONT_FOLLOW # undef EV_USE_INOTIFY # define EV_USE_INOTIFY 0 # endif #endif #if EV_USE_EVENTFD /* our minimum requirement is glibc 2.7 which has the stub, but not the full header */ # include # ifndef EFD_NONBLOCK # define EFD_NONBLOCK O_NONBLOCK # endif # ifndef EFD_CLOEXEC # ifdef O_CLOEXEC # define EFD_CLOEXEC O_CLOEXEC # else # define EFD_CLOEXEC 02000000 # endif # endif EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags); #endif #if EV_USE_SIGNALFD /* our minimum requirement is glibc 2.7 which has the stub, but not the full header */ # include # ifndef SFD_NONBLOCK # define SFD_NONBLOCK O_NONBLOCK # endif # ifndef SFD_CLOEXEC # ifdef O_CLOEXEC # define SFD_CLOEXEC O_CLOEXEC # else # define SFD_CLOEXEC 02000000 # endif # endif EV_CPP (extern "C") int (signalfd) (int fd, const sigset_t *mask, int flags); struct signalfd_siginfo { uint32_t ssi_signo; char pad[128 - sizeof (uint32_t)]; }; #endif /* for timerfd, libev core requires TFD_TIMER_CANCEL_ON_SET &c */ #if EV_USE_TIMERFD # include /* timerfd is only used for periodics */ # if !(defined (TFD_TIMER_CANCEL_ON_SET) && defined (TFD_CLOEXEC) && defined (TFD_NONBLOCK)) || !EV_PERIODIC_ENABLE # undef EV_USE_TIMERFD # define EV_USE_TIMERFD 0 # endif #endif /*****************************************************************************/ #if EV_VERIFY >= 3 # define EV_FREQUENT_CHECK ev_verify (EV_A) #else # define EV_FREQUENT_CHECK do { } while (0) #endif /* * This is used to work around floating point rounding problems. * This value is good at least till the year 4000. */ #define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */ /*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */ #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ #define MAX_BLOCKTIME2 1500001.07 /* same, but when timerfd is used to detect jumps, also safe delay to not overflow */ /* find a portable timestamp that is "always" in the future but fits into time_t. * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t, * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */ #define EV_TSTAMP_HUGE \ (sizeof (time_t) >= 8 ? 10000000000000. \ : 0 < (time_t)4294967295 ? 4294967295. \ : 2147483647.) \ #ifndef EV_TS_CONST # define EV_TS_CONST(nv) nv # define EV_TS_TO_MSEC(a) a * 1e3 + 0.9999 # define EV_TS_FROM_USEC(us) us * 1e-6 # define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) # define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) # define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e-6) # define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e-9) #endif /* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */ /* ECB.H BEGIN */ /* * libecb - http://software.schmorp.de/pkg/libecb * * Copyright (©) 2009-2015,2018-2020 Marc Alexander Lehmann * Copyright (©) 2011 Emanuele Giaquinta * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #ifndef ECB_H #define ECB_H /* 16 bits major, 16 bits minor */ #define ECB_VERSION 0x00010008 #include /* for memcpy */ #if defined (_WIN32) && !defined (__MINGW32__) typedef signed char int8_t; typedef unsigned char uint8_t; typedef signed char int_fast8_t; typedef unsigned char uint_fast8_t; typedef signed short int16_t; typedef unsigned short uint16_t; typedef signed int int_fast16_t; typedef unsigned int uint_fast16_t; typedef signed int int32_t; typedef unsigned int uint32_t; typedef signed int int_fast32_t; typedef unsigned int uint_fast32_t; #if __GNUC__ typedef signed long long int64_t; typedef unsigned long long uint64_t; #else /* _MSC_VER || __BORLANDC__ */ typedef signed __int64 int64_t; typedef unsigned __int64 uint64_t; #endif typedef int64_t int_fast64_t; typedef uint64_t uint_fast64_t; #ifdef _WIN64 #define ECB_PTRSIZE 8 typedef uint64_t uintptr_t; typedef int64_t intptr_t; #else #define ECB_PTRSIZE 4 typedef uint32_t uintptr_t; typedef int32_t intptr_t; #endif #else #include #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU #define ECB_PTRSIZE 8 #else #define ECB_PTRSIZE 4 #endif #endif #define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__) #define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64) #ifndef ECB_OPTIMIZE_SIZE #if __OPTIMIZE_SIZE__ #define ECB_OPTIMIZE_SIZE 1 #else #define ECB_OPTIMIZE_SIZE 0 #endif #endif /* work around x32 idiocy by defining proper macros */ #if ECB_GCC_AMD64 || ECB_MSVC_AMD64 #if _ILP32 #define ECB_AMD64_X32 1 #else #define ECB_AMD64 1 #endif #endif /* many compilers define _GNUC_ to some versions but then only implement * what their idiot authors think are the "more important" extensions, * causing enormous grief in return for some better fake benchmark numbers. * or so. * we try to detect these and simply assume they are not gcc - if they have * an issue with that they should have done it right in the first place. */ #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ #define ECB_GCC_VERSION(major,minor) 0 #else #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) #endif #define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor))) #if __clang__ && defined __has_builtin #define ECB_CLANG_BUILTIN(x) __has_builtin (x) #else #define ECB_CLANG_BUILTIN(x) 0 #endif #if __clang__ && defined __has_extension #define ECB_CLANG_EXTENSION(x) __has_extension (x) #else #define ECB_CLANG_EXTENSION(x) 0 #endif #define ECB_CPP (__cplusplus+0) #define ECB_CPP11 (__cplusplus >= 201103L) #define ECB_CPP14 (__cplusplus >= 201402L) #define ECB_CPP17 (__cplusplus >= 201703L) #if ECB_CPP #define ECB_C 0 #define ECB_STDC_VERSION 0 #else #define ECB_C 1 #define ECB_STDC_VERSION __STDC_VERSION__ #endif #define ECB_C99 (ECB_STDC_VERSION >= 199901L) #define ECB_C11 (ECB_STDC_VERSION >= 201112L) #define ECB_C17 (ECB_STDC_VERSION >= 201710L) #if ECB_CPP #define ECB_EXTERN_C extern "C" #define ECB_EXTERN_C_BEG ECB_EXTERN_C { #define ECB_EXTERN_C_END } #else #define ECB_EXTERN_C extern #define ECB_EXTERN_C_BEG #define ECB_EXTERN_C_END #endif /*****************************************************************************/ /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ #if ECB_NO_THREADS #define ECB_NO_SMP 1 #endif #if ECB_NO_SMP #define ECB_MEMORY_FENCE do { } while (0) #endif /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */ #if __xlC__ && ECB_CPP #include #endif #if 1400 <= _MSC_VER #include /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */ #endif #ifndef ECB_MEMORY_FENCE #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory") #if __i386 || __i386__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory") #elif ECB_GCC_AMD64 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory") #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") #elif defined __ARM_ARCH_2__ \ || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \ || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \ || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \ || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \ || defined __ARM_ARCH_5TEJ__ /* should not need any, unless running old code on newer cpu - arm doesn't support that */ #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \ || defined __ARM_ARCH_6T2__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") #elif __aarch64__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8) #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") #elif defined __s390__ || defined __s390x__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") #elif defined __mips__ /* GNU/Linux emulates sync on mips1 architectures, so we force its use */ /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */ #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory") #elif defined __alpha__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") #elif defined __hppa__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") #elif defined __ia64__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") #elif defined __m68k__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") #elif defined __m88k__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory") #elif defined __sh__ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") #endif #endif #endif #ifndef ECB_MEMORY_FENCE #if ECB_GCC_VERSION(4,7) /* see comment below (stdatomic.h) about the C11 memory model. */ #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED) #elif ECB_CLANG_EXTENSION(c_atomic) /* see comment below (stdatomic.h) about the C11 memory model. */ #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED) #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ #define ECB_MEMORY_FENCE __sync_synchronize () #elif _MSC_VER >= 1500 /* VC++ 2008 */ /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier() #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */ #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier() #elif _MSC_VER >= 1400 /* VC++ 2005 */ #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) #define ECB_MEMORY_FENCE _ReadWriteBarrier () #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () #elif defined _WIN32 #include #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 #include #define ECB_MEMORY_FENCE __machine_rw_barrier () #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier () #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier () #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier () #elif __xlC__ #define ECB_MEMORY_FENCE __sync () #endif #endif #ifndef ECB_MEMORY_FENCE #if ECB_C11 && !defined __STDC_NO_ATOMICS__ /* we assume that these memory fences work on all variables/all memory accesses, */ /* not just C11 atomics and atomic accesses */ #include #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire) #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release) #endif #endif #ifndef ECB_MEMORY_FENCE #if !ECB_AVOID_PTHREADS /* * if you get undefined symbol references to pthread_mutex_lock, * or failure to find pthread.h, then you should implement * the ECB_MEMORY_FENCE operations for your cpu/compiler * OR provide pthread.h and link against the posix thread library * of your system. */ #include #define ECB_NEEDS_PTHREADS 1 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) #endif #endif #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE #endif #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE #endif #if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */ #endif /*****************************************************************************/ #if ECB_CPP #define ecb_inline static inline #elif ECB_GCC_VERSION(2,5) #define ecb_inline static __inline__ #elif ECB_C99 #define ecb_inline static inline #else #define ecb_inline static #endif #if ECB_GCC_VERSION(3,3) #define ecb_restrict __restrict__ #elif ECB_C99 #define ecb_restrict restrict #else #define ecb_restrict #endif typedef int ecb_bool; #define ECB_CONCAT_(a, b) a ## b #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) #define ECB_STRINGIFY_(a) # a #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) #define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr)) #define ecb_function_ ecb_inline #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) #define ecb_attribute(attrlist) __attribute__ (attrlist) #else #define ecb_attribute(attrlist) #endif #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p) #define ecb_is_constant(expr) __builtin_constant_p (expr) #else /* possible C11 impl for integral types typedef struct ecb_is_constant_struct ecb_is_constant_struct; #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */ #define ecb_is_constant(expr) 0 #endif #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect) #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) #else #define ecb_expect(expr,value) (expr) #endif #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch) #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) #else #define ecb_prefetch(addr,rw,locality) #endif /* no emulation for ecb_decltype */ #if ECB_CPP11 // older implementations might have problems with decltype(x)::type, work around it template struct ecb_decltype_t { typedef T type; }; #define ecb_decltype(x) ecb_decltype_t::type #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8) #define ecb_decltype(x) __typeof__ (x) #endif #if _MSC_VER >= 1300 #define ecb_deprecated __declspec (deprecated) #else #define ecb_deprecated ecb_attribute ((__deprecated__)) #endif #if _MSC_VER >= 1500 #define ecb_deprecated_message(msg) __declspec (deprecated (msg)) #elif ECB_GCC_VERSION(4,5) #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg)) #else #define ecb_deprecated_message(msg) ecb_deprecated #endif #if _MSC_VER >= 1400 #define ecb_noinline __declspec (noinline) #else #define ecb_noinline ecb_attribute ((__noinline__)) #endif #define ecb_unused ecb_attribute ((__unused__)) #define ecb_const ecb_attribute ((__const__)) #define ecb_pure ecb_attribute ((__pure__)) #if ECB_C11 || __IBMC_NORETURN /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */ #define ecb_noreturn _Noreturn #elif ECB_CPP11 #define ecb_noreturn [[noreturn]] #elif _MSC_VER >= 1200 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */ #define ecb_noreturn __declspec (noreturn) #else #define ecb_noreturn ecb_attribute ((__noreturn__)) #endif #if ECB_GCC_VERSION(4,3) #define ecb_artificial ecb_attribute ((__artificial__)) #define ecb_hot ecb_attribute ((__hot__)) #define ecb_cold ecb_attribute ((__cold__)) #else #define ecb_artificial #define ecb_hot #define ecb_cold #endif /* put around conditional expressions if you are very sure that the */ /* expression is mostly true or mostly false. note that these return */ /* booleans, not the expression. */ #define ecb_expect_false(expr) ecb_expect (!!(expr), 0) #define ecb_expect_true(expr) ecb_expect (!!(expr), 1) /* for compatibility to the rest of the world */ #define ecb_likely(expr) ecb_expect_true (expr) #define ecb_unlikely(expr) ecb_expect_false (expr) /* count trailing zero bits and count # of one bits */ #if ECB_GCC_VERSION(3,4) \ || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \ && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \ && ECB_CLANG_BUILTIN(__builtin_popcount)) /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ #define ecb_ld32(x) (__builtin_clz (x) ^ 31) #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) #define ecb_ctz32(x) __builtin_ctz (x) #define ecb_ctz64(x) __builtin_ctzll (x) #define ecb_popcount32(x) __builtin_popcount (x) /* no popcountll */ #else ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); ecb_function_ ecb_const int ecb_ctz32 (uint32_t x) { #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) unsigned long r; _BitScanForward (&r, x); return (int)r; #else int r = 0; x &= ~x + 1; /* this isolates the lowest bit */ #if ECB_branchless_on_i386 r += !!(x & 0xaaaaaaaa) << 0; r += !!(x & 0xcccccccc) << 1; r += !!(x & 0xf0f0f0f0) << 2; r += !!(x & 0xff00ff00) << 3; r += !!(x & 0xffff0000) << 4; #else if (x & 0xaaaaaaaa) r += 1; if (x & 0xcccccccc) r += 2; if (x & 0xf0f0f0f0) r += 4; if (x & 0xff00ff00) r += 8; if (x & 0xffff0000) r += 16; #endif return r; #endif } ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); ecb_function_ ecb_const int ecb_ctz64 (uint64_t x) { #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) unsigned long r; _BitScanForward64 (&r, x); return (int)r; #else int shift = x & 0xffffffff ? 0 : 32; return ecb_ctz32 (x >> shift) + shift; #endif } ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); ecb_function_ ecb_const int ecb_popcount32 (uint32_t x) { x -= (x >> 1) & 0x55555555; x = ((x >> 2) & 0x33333333) + (x & 0x33333333); x = ((x >> 4) + x) & 0x0f0f0f0f; x *= 0x01010101; return x >> 24; } ecb_function_ ecb_const int ecb_ld32 (uint32_t x); ecb_function_ ecb_const int ecb_ld32 (uint32_t x) { #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) unsigned long r; _BitScanReverse (&r, x); return (int)r; #else int r = 0; if (x >> 16) { x >>= 16; r += 16; } if (x >> 8) { x >>= 8; r += 8; } if (x >> 4) { x >>= 4; r += 4; } if (x >> 2) { x >>= 2; r += 2; } if (x >> 1) { r += 1; } return r; #endif } ecb_function_ ecb_const int ecb_ld64 (uint64_t x); ecb_function_ ecb_const int ecb_ld64 (uint64_t x) { #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) unsigned long r; _BitScanReverse64 (&r, x); return (int)r; #else int r = 0; if (x >> 32) { x >>= 32; r += 32; } return r + ecb_ld32 (x); #endif } #endif ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x); ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x); ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x) { return ( (x * 0x0802U & 0x22110U) | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; } ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x); ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x) { x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); x = ( x >> 8 ) | ( x << 8); return x; } ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x); ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x) { x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); x = ( x >> 16 ) | ( x << 16); return x; } /* popcount64 is only available on 64 bit cpus as gcc builtin */ /* so for this version we are lazy */ ecb_function_ ecb_const int ecb_popcount64 (uint64_t x); ecb_function_ ecb_const int ecb_popcount64 (uint64_t x) { return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); } ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count); ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count); ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count); ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count); ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count); ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count); ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count); ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count); ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } #if ECB_CPP inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); } inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); } inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); } inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); } inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); } inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); } inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); } inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); } inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); } inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); } inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); } inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); } inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); } inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); } inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); } inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); } inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); } inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); } inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); } inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); } inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); } inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); } inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); } inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); } inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); } inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); } inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); } #endif #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16) #define ecb_bswap16(x) __builtin_bswap16 (x) #else #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) #endif #define ecb_bswap32(x) __builtin_bswap32 (x) #define ecb_bswap64(x) __builtin_bswap64 (x) #elif _MSC_VER #include #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x))) #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x))) #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x))) #else ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x); ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x) { return ecb_rotl16 (x, 8); } ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x); ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x) { return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); } ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x); ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x) { return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); } #endif #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) #define ecb_unreachable() __builtin_unreachable () #else /* this seems to work fine, but gcc always emits a warning for it :/ */ ecb_inline ecb_noreturn void ecb_unreachable (void); ecb_inline ecb_noreturn void ecb_unreachable (void) { } #endif /* try to tell the compiler that some condition is definitely true */ #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 ecb_inline ecb_const uint32_t ecb_byteorder_helper (void); ecb_inline ecb_const uint32_t ecb_byteorder_helper (void) { /* the union code still generates code under pressure in gcc, */ /* but less than using pointers, and always seems to */ /* successfully return a constant. */ /* the reason why we have this horrible preprocessor mess */ /* is to avoid it in all cases, at least on common architectures */ /* or when using a recent enough gcc version (>= 4.6) */ #if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \ || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__) #define ECB_LITTLE_ENDIAN 1 return 0x44332211; #elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \ || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__) #define ECB_BIG_ENDIAN 1 return 0x11223344; #else union { uint8_t c[4]; uint32_t u; } u = { 0x11, 0x22, 0x33, 0x44 }; return u.u; #endif } ecb_inline ecb_const ecb_bool ecb_big_endian (void); ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; } ecb_inline ecb_const ecb_bool ecb_little_endian (void); ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; } /*****************************************************************************/ /* unaligned load/store */ ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; } ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; } ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; } ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; } ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; } ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; } ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; } ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; } ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; } ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); } ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); } ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); } ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); } ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); } ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); } ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; } ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; } ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; } ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; } ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; } ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; } ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); } ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); } ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); } ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); } ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); } ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); } ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); } ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); } ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); } #if ECB_CPP inline uint8_t ecb_bswap (uint8_t v) { return v; } inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); } inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); } inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); } template inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; } template inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; } template inline T ecb_peek (const void *ptr) { return *(const T *)ptr; } template inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek (ptr)); } template inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek (ptr)); } template inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; } template inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u (ptr)); } template inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u (ptr)); } template inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; } template inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; } template inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; } template inline void ecb_poke_be (void *ptr, T v) { return ecb_poke (ptr, ecb_host_to_be (v)); } template inline void ecb_poke_le (void *ptr, T v) { return ecb_poke (ptr, ecb_host_to_le (v)); } template inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); } template inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u (ptr, ecb_host_to_be (v)); } template inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u (ptr, ecb_host_to_le (v)); } #endif /*****************************************************************************/ #if ECB_GCC_VERSION(3,0) || ECB_C99 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) #else #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) #endif #if ECB_CPP template static inline T ecb_div_rd (T val, T div) { return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; } template static inline T ecb_div_ru (T val, T div) { return val < 0 ? - ((-val ) / div) : (val + div - 1) / div; } #else #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div)) #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div)) #endif #if ecb_cplusplus_does_not_suck /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ template static inline int ecb_array_length (const T (&arr)[N]) { return N; } #else #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) #endif /*****************************************************************************/ ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x); ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x) { unsigned int s = (x & 0x8000) << (31 - 15); int e = (x >> 10) & 0x001f; unsigned int m = x & 0x03ff; if (ecb_expect_false (e == 31)) /* infinity or NaN */ e = 255 - (127 - 15); else if (ecb_expect_false (!e)) { if (ecb_expect_true (!m)) /* zero, handled by code below by forcing e to 0 */ e = 0 - (127 - 15); else { /* subnormal, renormalise */ unsigned int s = 10 - ecb_ld32 (m); m = (m << s) & 0x3ff; /* mask implicit bit */ e -= s - 1; } } /* e and m now are normalised, or zero, (or inf or nan) */ e += 127 - 15; return s | (e << 23) | (m << (23 - 10)); } ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x); ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x) { unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */ unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */ unsigned int m = x & 0x007fffff; x &= 0x7fffffff; /* if it's within range of binary16 normals, use fast path */ if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff)) { /* mantissa round-to-even */ m += 0x00000fff + ((m >> (23 - 10)) & 1); /* handle overflow */ if (ecb_expect_false (m >= 0x00800000)) { m >>= 1; e += 1; } return s | (e << 10) | (m >> (23 - 10)); } /* handle large numbers and infinity */ if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000)) return s | 0x7c00; /* handle zero, subnormals and small numbers */ if (ecb_expect_true (x < 0x38800000)) { /* zero */ if (ecb_expect_true (!x)) return s; /* handle subnormals */ /* too small, will be zero */ if (e < (14 - 24)) /* might not be sharp, but is good enough */ return s; m |= 0x00800000; /* make implicit bit explicit */ /* very tricky - we need to round to the nearest e (+10) bit value */ { unsigned int bits = 14 - e; unsigned int half = (1 << (bits - 1)) - 1; unsigned int even = (m >> bits) & 1; /* if this overflows, we will end up with a normalised number */ m = (m + half + even) >> bits; } return s | m; } /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */ m >>= 13; return s | 0x7c00 | m | !m; } /*******************************************************************************/ /* floating point stuff, can be disabled by defining ECB_NO_LIBM */ /* basically, everything uses "ieee pure-endian" floating point numbers */ /* the only noteworthy exception is ancient armle, which uses order 43218765 */ #if 0 \ || __i386 || __i386__ \ || ECB_GCC_AMD64 \ || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ || defined __s390__ || defined __s390x__ \ || defined __mips__ \ || defined __alpha__ \ || defined __hppa__ \ || defined __ia64__ \ || defined __m68k__ \ || defined __m88k__ \ || defined __sh__ \ || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \ || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ || defined __aarch64__ #define ECB_STDFP 1 #else #define ECB_STDFP 0 #endif #ifndef ECB_NO_LIBM #include /* for frexp*, ldexp*, INFINITY, NAN */ /* only the oldest of old doesn't have this one. solaris. */ #ifdef INFINITY #define ECB_INFINITY INFINITY #else #define ECB_INFINITY HUGE_VAL #endif #ifdef NAN #define ECB_NAN NAN #else #define ECB_NAN ECB_INFINITY #endif #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L #define ecb_ldexpf(x,e) ldexpf ((x), (e)) #define ecb_frexpf(x,e) frexpf ((x), (e)) #else #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e)) #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e)) #endif /* convert a float to ieee single/binary32 */ ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x) { uint32_t r; #if ECB_STDFP memcpy (&r, &x, 4); #else /* slow emulation, works for anything but -0 */ uint32_t m; int e; if (x == 0e0f ) return 0x00000000U; if (x > +3.40282346638528860e+38f) return 0x7f800000U; if (x < -3.40282346638528860e+38f) return 0xff800000U; if (x != x ) return 0x7fbfffffU; m = ecb_frexpf (x, &e) * 0x1000000U; r = m & 0x80000000U; if (r) m = -m; if (e <= -126) { m &= 0xffffffU; m >>= (-125 - e); e = -126; } r |= (e + 126) << 23; r |= m & 0x7fffffU; #endif return r; } /* converts an ieee single/binary32 to a float */ ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x); ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x) { float r; #if ECB_STDFP memcpy (&r, &x, 4); #else /* emulation, only works for normals and subnormals and +0 */ int neg = x >> 31; int e = (x >> 23) & 0xffU; x &= 0x7fffffU; if (e) x |= 0x800000U; else e = 1; /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126); r = neg ? -r : r; #endif return r; } /* convert a double to ieee double/binary64 */ ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x); ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x) { uint64_t r; #if ECB_STDFP memcpy (&r, &x, 8); #else /* slow emulation, works for anything but -0 */ uint64_t m; int e; if (x == 0e0 ) return 0x0000000000000000U; if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U; if (x < -1.79769313486231470e+308) return 0xfff0000000000000U; if (x != x ) return 0X7ff7ffffffffffffU; m = frexp (x, &e) * 0x20000000000000U; r = m & 0x8000000000000000;; if (r) m = -m; if (e <= -1022) { m &= 0x1fffffffffffffU; m >>= (-1021 - e); e = -1022; } r |= ((uint64_t)(e + 1022)) << 52; r |= m & 0xfffffffffffffU; #endif return r; } /* converts an ieee double/binary64 to a double */ ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x); ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x) { double r; #if ECB_STDFP memcpy (&r, &x, 8); #else /* emulation, only works for normals and subnormals and +0 */ int neg = x >> 63; int e = (x >> 52) & 0x7ffU; x &= 0xfffffffffffffU; if (e) x |= 0x10000000000000U; else e = 1; /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */ r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022); r = neg ? -r : r; #endif return r; } /* convert a float to ieee half/binary16 */ ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x); ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x) { return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x)); } /* convert an ieee half/binary16 to float */ ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x); ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x) { return ecb_binary32_to_float (ecb_binary16_to_binary32 (x)); } #endif #endif /* ECB.H END */ #if ECB_MEMORY_FENCE_NEEDS_PTHREADS /* if your architecture doesn't need memory fences, e.g. because it is * single-cpu/core, or if you use libev in a project that doesn't use libev * from multiple threads, then you can define ECB_NO_THREADS when compiling * libev, in which cases the memory fences become nops. * alternatively, you can remove this #error and link against libpthread, * which will then provide the memory fences. */ # error "memory fences not defined for your architecture, please report" #endif #ifndef ECB_MEMORY_FENCE # define ECB_MEMORY_FENCE do { } while (0) # define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE # define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE #endif #define inline_size ecb_inline #if EV_FEATURE_CODE # define inline_speed ecb_inline #else # define inline_speed ecb_noinline static #endif /*****************************************************************************/ /* raw syscall wrappers */ #if EV_NEED_SYSCALL #include /* * define some syscall wrappers for common architectures * this is mostly for nice looks during debugging, not performance. * our syscalls return < 0, not == -1, on error. which is good * enough for linux aio. * TODO: arm is also common nowadays, maybe even mips and x86 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove... */ #if __GNUC__ && __linux && ECB_AMD64 && !EV_FEATURE_CODE /* the costly errno access probably kills this for size optimisation */ #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \ ({ \ long res; \ register unsigned long r6 __asm__ ("r9" ); \ register unsigned long r5 __asm__ ("r8" ); \ register unsigned long r4 __asm__ ("r10"); \ register unsigned long r3 __asm__ ("rdx"); \ register unsigned long r2 __asm__ ("rsi"); \ register unsigned long r1 __asm__ ("rdi"); \ if (narg >= 6) r6 = (unsigned long)(arg6); \ if (narg >= 5) r5 = (unsigned long)(arg5); \ if (narg >= 4) r4 = (unsigned long)(arg4); \ if (narg >= 3) r3 = (unsigned long)(arg3); \ if (narg >= 2) r2 = (unsigned long)(arg2); \ if (narg >= 1) r1 = (unsigned long)(arg1); \ __asm__ __volatile__ ( \ "syscall\n\t" \ : "=a" (res) \ : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \ : "cc", "r11", "cx", "memory"); \ errno = -res; \ res; \ }) #endif #ifdef ev_syscall #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0, 0) #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0, 0) #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0, 0) #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0, 0) #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0, 0) #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5, 0) #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) ev_syscall (nr, 6, arg1, arg2, arg3, arg4, arg5,arg6) #else #define ev_syscall0(nr) syscall (nr) #define ev_syscall1(nr,arg1) syscall (nr, arg1) #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2) #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3) #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4) #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5) #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) syscall (nr, arg1, arg2, arg3, arg4, arg5,arg6) #endif #endif /*****************************************************************************/ #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) #if EV_MINPRI == EV_MAXPRI # define ABSPRI(w) (((W)w), 0) #else # define ABSPRI(w) (((W)w)->priority - EV_MINPRI) #endif #define EMPTY /* required for microsofts broken pseudo-c compiler */ typedef ev_watcher *W; typedef ev_watcher_list *WL; typedef ev_watcher_time *WT; #define ev_active(w) ((W)(w))->active #define ev_at(w) ((WT)(w))->at #if EV_USE_REALTIME /* sig_atomic_t is used to avoid per-thread variables or locking but still */ /* giving it a reasonably high chance of working on typical architectures */ static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ #endif #if EV_USE_MONOTONIC static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ #endif #ifndef EV_FD_TO_WIN32_HANDLE # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) #endif #ifndef EV_WIN32_HANDLE_TO_FD # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) #endif #ifndef EV_WIN32_CLOSE_FD # define EV_WIN32_CLOSE_FD(fd) close (fd) #endif #ifdef _WIN32 # include "ev_win32.c" #endif /*****************************************************************************/ #if EV_USE_LINUXAIO # include /* probably only needed for aio_context_t */ #endif /* define a suitable floor function (only used by periodics atm) */ #if EV_USE_FLOOR # include # define ev_floor(v) floor (v) #else #include /* a floor() replacement function, should be independent of ev_tstamp type */ ecb_noinline static ev_tstamp ev_floor (ev_tstamp v) { /* the choice of shift factor is not terribly important */ #if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */ const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.; #else const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.; #endif /* special treatment for negative arguments */ if (ecb_expect_false (v < 0.)) { ev_tstamp f = -ev_floor (-v); return f - (f == v ? 0 : 1); } /* argument too large for an unsigned long? then reduce it */ if (ecb_expect_false (v >= shift)) { ev_tstamp f; if (v == v - 1.) return v; /* very large numbers are assumed to be integer */ f = shift * ev_floor (v * (1. / shift)); return f + ev_floor (v - f); } /* fits into an unsigned long */ return (unsigned long)v; } #endif /*****************************************************************************/ #ifdef __linux # include #endif ecb_noinline ecb_cold static unsigned int ev_linux_version (void) { #ifdef __linux unsigned int v = 0; struct utsname buf; int i; char *p = buf.release; if (uname (&buf)) return 0; for (i = 3+1; --i; ) { unsigned int c = 0; for (;;) { if (*p >= '0' && *p <= '9') c = c * 10 + *p++ - '0'; else { p += *p == '.'; break; } } v = (v << 8) | c; } return v; #else return 0; #endif } /*****************************************************************************/ #if EV_AVOID_STDIO ecb_noinline ecb_cold static void ev_printerr (const char *msg) { write (STDERR_FILENO, msg, strlen (msg)); } #endif static void (*syserr_cb)(const char *msg) EV_NOEXCEPT; ecb_cold void ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT { syserr_cb = cb; } ecb_noinline ecb_cold static void ev_syserr (const char *msg) { if (!msg) msg = "(libev) system error"; if (syserr_cb) syserr_cb (msg); else { #if EV_AVOID_STDIO ev_printerr (msg); ev_printerr (": "); ev_printerr (strerror (errno)); ev_printerr ("\n"); #else perror (msg); #endif abort (); } } static void * ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT { /* some systems, notably openbsd and darwin, fail to properly * implement realloc (x, 0) (as required by both ansi c-89 and * the single unix specification, so work around them here. * recently, also (at least) fedora and debian started breaking it, * despite documenting it otherwise. */ if (size) return realloc (ptr, size); free (ptr); return 0; } static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul; ecb_cold void ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT { alloc = cb; } inline_speed void * ev_realloc (void *ptr, long size) { ptr = alloc (ptr, size); if (!ptr && size) { #if EV_AVOID_STDIO ev_printerr ("(libev) memory allocation failed, aborting.\n"); #else fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size); #endif abort (); } return ptr; } #define ev_malloc(size) ev_realloc (0, (size)) #define ev_free(ptr) ev_realloc ((ptr), 0) /*****************************************************************************/ /* set in reify when reification needed */ #define EV_ANFD_REIFY 1 /* file descriptor info structure */ typedef struct { WL head; unsigned char events; /* the events watched for */ unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ unsigned char emask; /* some backends store the actual kernel mask in here */ unsigned char eflags; /* flags field for use by backends */ #if EV_USE_EPOLL unsigned int egen; /* generation counter to counter epoll bugs */ #endif #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP SOCKET handle; #endif #if EV_USE_IOCP OVERLAPPED or, ow; #endif } ANFD; /* stores the pending event set for a given watcher */ typedef struct { W w; int events; /* the pending event set for the given watcher */ } ANPENDING; #if EV_USE_INOTIFY /* hash table entry per inotify-id */ typedef struct { WL head; } ANFS; #endif /* Heap Entry */ #if EV_HEAP_CACHE_AT /* a heap element */ typedef struct { ev_tstamp at; WT w; } ANHE; #define ANHE_w(he) (he).w /* access watcher, read-write */ #define ANHE_at(he) (he).at /* access cached at, read-only */ #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ #else /* a heap element */ typedef WT ANHE; #define ANHE_w(he) (he) #define ANHE_at(he) (he)->at #define ANHE_at_cache(he) #endif #if EV_MULTIPLICITY struct ev_loop { ev_tstamp ev_rt_now; #define ev_rt_now ((loop)->ev_rt_now) #define VAR(name,decl) decl; #include "ev_vars.h" #undef VAR }; #include "ev_wrap.h" static struct ev_loop default_loop_struct; EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */ #else EV_API_DECL ev_tstamp ev_rt_now = EV_TS_CONST (0.); /* needs to be initialised to make it a definition despite extern */ #define VAR(name,decl) static decl; #include "ev_vars.h" #undef VAR static int ev_default_loop_ptr; #endif #if EV_FEATURE_API # define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A) # define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A) # define EV_INVOKE_PENDING invoke_cb (EV_A) #else # define EV_RELEASE_CB (void)0 # define EV_ACQUIRE_CB (void)0 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A) #endif #define EVBREAK_RECURSE 0x80 /*****************************************************************************/ #ifndef EV_HAVE_EV_TIME ev_tstamp ev_time (void) EV_NOEXCEPT { #if EV_USE_REALTIME if (ecb_expect_true (have_realtime)) { struct timespec ts; clock_gettime (CLOCK_REALTIME, &ts); return EV_TS_GET (ts); } #endif { struct timeval tv; gettimeofday (&tv, 0); return EV_TV_GET (tv); } } #endif inline_size ev_tstamp get_clock (void) { #if EV_USE_MONOTONIC if (ecb_expect_true (have_monotonic)) { struct timespec ts; clock_gettime (CLOCK_MONOTONIC, &ts); return EV_TS_GET (ts); } #endif return ev_time (); } #if EV_MULTIPLICITY ev_tstamp ev_now (EV_P) EV_NOEXCEPT { return ev_rt_now; } #endif void ev_sleep (ev_tstamp delay) EV_NOEXCEPT { if (delay > EV_TS_CONST (0.)) { #if EV_USE_NANOSLEEP struct timespec ts; EV_TS_SET (ts, delay); nanosleep (&ts, 0); #elif defined _WIN32 /* maybe this should round up, as ms is very low resolution */ /* compared to select (µs) or nanosleep (ns) */ Sleep ((unsigned long)(EV_TS_TO_MSEC (delay))); #else struct timeval tv; /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ /* something not guaranteed by newer posix versions, but guaranteed */ /* by older ones */ EV_TV_SET (tv, delay); select (0, 0, 0, 0, &tv); #endif } } /*****************************************************************************/ #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ /* find a suitable new size for the given array, */ /* hopefully by rounding to a nice-to-malloc size */ inline_size int array_nextsize (int elem, int cur, int cnt) { int ncur = cur + 1; do ncur <<= 1; while (cnt > ncur); /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */ if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) { ncur *= elem; ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); ncur = ncur - sizeof (void *) * 4; ncur /= elem; } return ncur; } ecb_noinline ecb_cold static void * array_realloc (int elem, void *base, int *cur, int cnt) { *cur = array_nextsize (elem, *cur, cnt); return ev_realloc (base, elem * *cur); } #define array_needsize_noinit(base,offset,count) #define array_needsize_zerofill(base,offset,count) \ memset ((void *)(base + offset), 0, sizeof (*(base)) * (count)) #define array_needsize(type,base,cur,cnt,init) \ if (ecb_expect_false ((cnt) > (cur))) \ { \ ecb_unused int ocur_ = (cur); \ (base) = (type *)array_realloc \ (sizeof (type), (base), &(cur), (cnt)); \ init ((base), ocur_, ((cur) - ocur_)); \ } #if 0 #define array_slim(type,stem) \ if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ { \ stem ## max = array_roundsize (stem ## cnt >> 1); \ base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ } #endif #define array_free(stem, idx) \ ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 /*****************************************************************************/ /* dummy callback for pending events */ ecb_noinline static void pendingcb (EV_P_ ev_prepare *w, int revents) { } ecb_noinline void ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT { W w_ = (W)w; int pri = ABSPRI (w_); if (ecb_expect_false (w_->pending)) pendings [pri][w_->pending - 1].events |= revents; else { w_->pending = ++pendingcnt [pri]; array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit); pendings [pri][w_->pending - 1].w = w_; pendings [pri][w_->pending - 1].events = revents; } pendingpri = NUMPRI - 1; } inline_speed void feed_reverse (EV_P_ W w) { array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit); rfeeds [rfeedcnt++] = w; } inline_size void feed_reverse_done (EV_P_ int revents) { do ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents); while (rfeedcnt); } inline_speed void queue_events (EV_P_ W *events, int eventcnt, int type) { int i; for (i = 0; i < eventcnt; ++i) ev_feed_event (EV_A_ events [i], type); } /*****************************************************************************/ inline_speed void fd_event_nocheck (EV_P_ int fd, int revents) { ANFD *anfd = anfds + fd; ev_io *w; for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) { int ev = w->events & revents; if (ev) ev_feed_event (EV_A_ (W)w, ev); } } /* do not submit kernel events for fds that have reify set */ /* because that means they changed while we were polling for new events */ inline_speed void fd_event (EV_P_ int fd, int revents) { ANFD *anfd = anfds + fd; if (ecb_expect_true (!anfd->reify)) fd_event_nocheck (EV_A_ fd, revents); } void ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT { if (fd >= 0 && fd < anfdmax) fd_event_nocheck (EV_A_ fd, revents); } /* make sure the external fd watch events are in-sync */ /* with the kernel/libev internal state */ inline_size void fd_reify (EV_P) { int i; /* most backends do not modify the fdchanges list in backend_modfiy. * except io_uring, which has fixed-size buffers which might force us * to handle events in backend_modify, causing fdchanges to be amended, * which could result in an endless loop. * to avoid this, we do not dynamically handle fds that were added * during fd_reify. that means that for those backends, fdchangecnt * might be non-zero during poll, which must cause them to not block. * to not put too much of a burden on other backends, this detail * needs to be handled in the backend. */ int changecnt = fdchangecnt; #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP for (i = 0; i < changecnt; ++i) { int fd = fdchanges [i]; ANFD *anfd = anfds + fd; if (anfd->reify & EV__IOFDSET && anfd->head) { SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd); if (handle != anfd->handle) { unsigned long arg; assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0)); /* handle changed, but fd didn't - we need to do it in two steps */ backend_modify (EV_A_ fd, anfd->events, 0); anfd->events = 0; anfd->handle = handle; } } } #endif for (i = 0; i < changecnt; ++i) { int fd = fdchanges [i]; ANFD *anfd = anfds + fd; ev_io *w; unsigned char o_events = anfd->events; unsigned char o_reify = anfd->reify; anfd->reify = 0; /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ { anfd->events = 0; for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) anfd->events |= (unsigned char)w->events; if (o_events != anfd->events) o_reify = EV__IOFDSET; /* actually |= */ } if (o_reify & EV__IOFDSET) backend_modify (EV_A_ fd, o_events, anfd->events); } /* normally, fdchangecnt hasn't changed. if it has, then new fds have been added. * this is a rare case (see beginning comment in this function), so we copy them to the * front and hope the backend handles this case. */ if (ecb_expect_false (fdchangecnt != changecnt)) memmove (fdchanges, fdchanges + changecnt, (fdchangecnt - changecnt) * sizeof (*fdchanges)); fdchangecnt -= changecnt; } /* something about the given fd changed */ inline_size void fd_change (EV_P_ int fd, int flags) { unsigned char reify = anfds [fd].reify; anfds [fd].reify = reify | flags; if (ecb_expect_true (!reify)) { ++fdchangecnt; array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit); fdchanges [fdchangecnt - 1] = fd; } } /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ inline_speed ecb_cold void fd_kill (EV_P_ int fd) { ev_io *w; while ((w = (ev_io *)anfds [fd].head)) { ev_io_stop (EV_A_ w); ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); } } /* check whether the given fd is actually valid, for error recovery */ inline_size ecb_cold int fd_valid (int fd) { #ifdef _WIN32 return EV_FD_TO_WIN32_HANDLE (fd) != -1; #else return fcntl (fd, F_GETFD) != -1; #endif } /* called on EBADF to verify fds */ ecb_noinline ecb_cold static void fd_ebadf (EV_P) { int fd; for (fd = 0; fd < anfdmax; ++fd) if (anfds [fd].events) if (!fd_valid (fd) && errno == EBADF) fd_kill (EV_A_ fd); } /* called on ENOMEM in select/poll to kill some fds and retry */ ecb_noinline ecb_cold static void fd_enomem (EV_P) { int fd; for (fd = anfdmax; fd--; ) if (anfds [fd].events) { fd_kill (EV_A_ fd); break; } } /* usually called after fork if backend needs to re-arm all fds from scratch */ ecb_noinline static void fd_rearm_all (EV_P) { int fd; for (fd = 0; fd < anfdmax; ++fd) if (anfds [fd].events) { anfds [fd].events = 0; anfds [fd].emask = 0; fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); } } /* used to prepare libev internal fd's */ /* this is not fork-safe */ inline_speed void fd_intern (int fd) { #ifdef _WIN32 unsigned long arg = 1; ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg); #else fcntl (fd, F_SETFD, FD_CLOEXEC); fcntl (fd, F_SETFL, O_NONBLOCK); #endif } /*****************************************************************************/ /* * the heap functions want a real array index. array index 0 is guaranteed to not * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives * the branching factor of the d-tree. */ /* * at the moment we allow libev the luxury of two heaps, * a small-code-size 2-heap one and a ~1.5kb larger 4-heap * which is more cache-efficient. * the difference is about 5% with 50000+ watchers. */ #if EV_USE_4HEAP #define DHEAP 4 #define HEAP0 (DHEAP - 1) /* index of first element in heap */ #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) #define UPHEAP_DONE(p,k) ((p) == (k)) /* away from the root */ inline_speed void downheap (ANHE *heap, int N, int k) { ANHE he = heap [k]; ANHE *E = heap + N + HEAP0; for (;;) { ev_tstamp minat; ANHE *minpos; ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; /* find minimum child */ if (ecb_expect_true (pos + DHEAP - 1 < E)) { /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); if ( minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos)); if ( minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos)); if ( minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos)); } else if (pos < E) { /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); if (pos + 1 < E && minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos)); if (pos + 2 < E && minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos)); if (pos + 3 < E && minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos)); } else break; if (ANHE_at (he) <= minat) break; heap [k] = *minpos; ev_active (ANHE_w (*minpos)) = k; k = minpos - heap; } heap [k] = he; ev_active (ANHE_w (he)) = k; } #else /* not 4HEAP */ #define HEAP0 1 #define HPARENT(k) ((k) >> 1) #define UPHEAP_DONE(p,k) (!(p)) /* away from the root */ inline_speed void downheap (ANHE *heap, int N, int k) { ANHE he = heap [k]; for (;;) { int c = k << 1; if (c >= N + HEAP0) break; c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) ? 1 : 0; if (ANHE_at (he) <= ANHE_at (heap [c])) break; heap [k] = heap [c]; ev_active (ANHE_w (heap [k])) = k; k = c; } heap [k] = he; ev_active (ANHE_w (he)) = k; } #endif /* towards the root */ inline_speed void upheap (ANHE *heap, int k) { ANHE he = heap [k]; for (;;) { int p = HPARENT (k); if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he)) break; heap [k] = heap [p]; ev_active (ANHE_w (heap [k])) = k; k = p; } heap [k] = he; ev_active (ANHE_w (he)) = k; } /* move an element suitably so it is in a correct place */ inline_size void adjustheap (ANHE *heap, int N, int k) { if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)])) upheap (heap, k); else downheap (heap, N, k); } /* rebuild the heap: this function is used only once and executed rarely */ inline_size void reheap (ANHE *heap, int N) { int i; /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ for (i = 0; i < N; ++i) upheap (heap, i + HEAP0); } /*****************************************************************************/ /* associate signal watchers to a signal */ typedef struct { EV_ATOMIC_T pending; #if EV_MULTIPLICITY EV_P; #endif WL head; } ANSIG; static ANSIG signals [EV_NSIG - 1]; /*****************************************************************************/ #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE ecb_noinline ecb_cold static void evpipe_init (EV_P) { if (!ev_is_active (&pipe_w)) { int fds [2]; # if EV_USE_EVENTFD fds [0] = -1; fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); if (fds [1] < 0 && errno == EINVAL) fds [1] = eventfd (0, 0); if (fds [1] < 0) # endif { while (pipe (fds)) ev_syserr ("(libev) error creating signal/async pipe"); fd_intern (fds [0]); } evpipe [0] = fds [0]; if (evpipe [1] < 0) evpipe [1] = fds [1]; /* first call, set write fd */ else { /* on subsequent calls, do not change evpipe [1] */ /* so that evpipe_write can always rely on its value. */ /* this branch does not do anything sensible on windows, */ /* so must not be executed on windows */ dup2 (fds [1], evpipe [1]); close (fds [1]); } fd_intern (evpipe [1]); ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ); ev_io_start (EV_A_ &pipe_w); ev_unref (EV_A); /* watcher should not keep loop alive */ } } inline_speed void evpipe_write (EV_P_ EV_ATOMIC_T *flag) { ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */ if (ecb_expect_true (*flag)) return; *flag = 1; ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */ pipe_write_skipped = 1; ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */ if (pipe_write_wanted) { int old_errno; pipe_write_skipped = 0; ECB_MEMORY_FENCE_RELEASE; old_errno = errno; /* save errno because write will clobber it */ #if EV_USE_EVENTFD if (evpipe [0] < 0) { uint64_t counter = 1; write (evpipe [1], &counter, sizeof (uint64_t)); } else #endif { #ifdef _WIN32 WSABUF buf; DWORD sent; buf.buf = (char *)&buf; buf.len = 1; WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0); #else write (evpipe [1], &(evpipe [1]), 1); #endif } errno = old_errno; } } /* called whenever the libev signal pipe */ /* got some events (signal, async) */ static void pipecb (EV_P_ ev_io *iow, int revents) { int i; if (revents & EV_READ) { #if EV_USE_EVENTFD if (evpipe [0] < 0) { uint64_t counter; read (evpipe [1], &counter, sizeof (uint64_t)); } else #endif { char dummy[4]; #ifdef _WIN32 WSABUF buf; DWORD recvd; DWORD flags = 0; buf.buf = dummy; buf.len = sizeof (dummy); WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0); #else read (evpipe [0], &dummy, sizeof (dummy)); #endif } } pipe_write_skipped = 0; ECB_MEMORY_FENCE; /* push out skipped, acquire flags */ #if EV_SIGNAL_ENABLE if (sig_pending) { sig_pending = 0; ECB_MEMORY_FENCE; for (i = EV_NSIG - 1; i--; ) if (ecb_expect_false (signals [i].pending)) ev_feed_signal_event (EV_A_ i + 1); } #endif #if EV_ASYNC_ENABLE if (async_pending) { async_pending = 0; ECB_MEMORY_FENCE; for (i = asynccnt; i--; ) if (asyncs [i]->sent) { asyncs [i]->sent = 0; ECB_MEMORY_FENCE_RELEASE; ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); } } #endif } /*****************************************************************************/ void ev_feed_signal (int signum) EV_NOEXCEPT { #if EV_MULTIPLICITY EV_P; ECB_MEMORY_FENCE_ACQUIRE; EV_A = signals [signum - 1].loop; if (!EV_A) return; #endif signals [signum - 1].pending = 1; evpipe_write (EV_A_ &sig_pending); } static void ev_sighandler (int signum) { #ifdef _WIN32 signal (signum, ev_sighandler); #endif ev_feed_signal (signum); } ecb_noinline void ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT { WL w; if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG)) return; --signum; #if EV_MULTIPLICITY /* it is permissible to try to feed a signal to the wrong loop */ /* or, likely more useful, feeding a signal nobody is waiting for */ if (ecb_expect_false (signals [signum].loop != EV_A)) return; #endif signals [signum].pending = 0; ECB_MEMORY_FENCE_RELEASE; for (w = signals [signum].head; w; w = w->next) ev_feed_event (EV_A_ (W)w, EV_SIGNAL); } #if EV_USE_SIGNALFD static void sigfdcb (EV_P_ ev_io *iow, int revents) { struct signalfd_siginfo si[2], *sip; /* these structs are big */ for (;;) { ssize_t res = read (sigfd, si, sizeof (si)); /* not ISO-C, as res might be -1, but works with SuS */ for (sip = si; (char *)sip < (char *)si + res; ++sip) ev_feed_signal_event (EV_A_ sip->ssi_signo); if (res < (ssize_t)sizeof (si)) break; } } #endif #endif /*****************************************************************************/ #if EV_CHILD_ENABLE static WL childs [EV_PID_HASHSIZE]; static ev_signal childev; #ifndef WIFCONTINUED # define WIFCONTINUED(status) 0 #endif /* handle a single child status event */ inline_speed void child_reap (EV_P_ int chain, int pid, int status) { ev_child *w; int traced = WIFSTOPPED (status) || WIFCONTINUED (status); for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) { if ((w->pid == pid || !w->pid) && (!traced || (w->flags & 1))) { ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ w->rpid = pid; w->rstatus = status; ev_feed_event (EV_A_ (W)w, EV_CHILD); } } } #ifndef WCONTINUED # define WCONTINUED 0 #endif /* called on sigchld etc., calls waitpid */ static void childcb (EV_P_ ev_signal *sw, int revents) { int pid, status; /* some systems define WCONTINUED but then fail to support it (linux 2.4) */ if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) if (!WCONTINUED || errno != EINVAL || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) return; /* make sure we are called again until all children have been reaped */ /* we need to do it this way so that the callback gets called before we continue */ ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); child_reap (EV_A_ pid, pid, status); if ((EV_PID_HASHSIZE) > 1) child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ } #endif /*****************************************************************************/ #if EV_USE_TIMERFD static void periodics_reschedule (EV_P); static void timerfdcb (EV_P_ ev_io *iow, int revents) { struct itimerspec its = { 0 }; its.it_value.tv_sec = ev_rt_now + (int)MAX_BLOCKTIME2; timerfd_settime (timerfd, TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET, &its, 0); ev_rt_now = ev_time (); /* periodics_reschedule only needs ev_rt_now */ /* but maybe in the future we want the full treatment. */ /* now_floor = EV_TS_CONST (0.); time_update (EV_A_ EV_TSTAMP_HUGE); */ #if EV_PERIODIC_ENABLE periodics_reschedule (EV_A); #endif } ecb_noinline ecb_cold static void evtimerfd_init (EV_P) { if (!ev_is_active (&timerfd_w)) { timerfd = timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC); if (timerfd >= 0) { fd_intern (timerfd); /* just to be sure */ ev_io_init (&timerfd_w, timerfdcb, timerfd, EV_READ); ev_set_priority (&timerfd_w, EV_MINPRI); ev_io_start (EV_A_ &timerfd_w); ev_unref (EV_A); /* watcher should not keep loop alive */ /* (re-) arm timer */ timerfdcb (EV_A_ 0, 0); } } } #endif /*****************************************************************************/ #if EV_USE_IOCP # include "ev_iocp.c" #endif #if EV_USE_PORT # include "ev_port.c" #endif #if EV_USE_KQUEUE # include "ev_kqueue.c" #endif #if EV_USE_EPOLL # include "ev_epoll.c" #endif #if EV_USE_LINUXAIO # include "ev_linuxaio.c" #endif #if EV_USE_IOURING # include "ev_iouring.c" #endif #if EV_USE_POLL # include "ev_poll.c" #endif #if EV_USE_SELECT # include "ev_select.c" #endif ecb_cold int ev_version_major (void) EV_NOEXCEPT { return EV_VERSION_MAJOR; } ecb_cold int ev_version_minor (void) EV_NOEXCEPT { return EV_VERSION_MINOR; } /* return true if we are running with elevated privileges and should ignore env variables */ inline_size ecb_cold int enable_secure (void) { #ifdef _WIN32 return 0; #else return getuid () != geteuid () || getgid () != getegid (); #endif } ecb_cold unsigned int ev_supported_backends (void) EV_NOEXCEPT { unsigned int flags = 0; if (EV_USE_PORT ) flags |= EVBACKEND_PORT; if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE; if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; if (EV_USE_LINUXAIO ) flags |= EVBACKEND_LINUXAIO; if (EV_USE_IOURING && ev_linux_version () >= 0x050601) flags |= EVBACKEND_IOURING; /* 5.6.1+ */ if (EV_USE_POLL ) flags |= EVBACKEND_POLL; if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT; return flags; } ecb_cold unsigned int ev_recommended_backends (void) EV_NOEXCEPT { unsigned int flags = ev_supported_backends (); #ifndef __NetBSD__ /* kqueue is borked on everything but netbsd apparently */ /* it usually doesn't work correctly on anything but sockets and pipes */ flags &= ~EVBACKEND_KQUEUE; #endif #ifdef __APPLE__ /* only select works correctly on that "unix-certified" platform */ flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ #endif #ifdef __FreeBSD__ flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ #endif /* TODO: linuxaio is very experimental */ #if !EV_RECOMMEND_LINUXAIO flags &= ~EVBACKEND_LINUXAIO; #endif /* TODO: linuxaio is super experimental */ #if !EV_RECOMMEND_IOURING flags &= ~EVBACKEND_IOURING; #endif return flags; } ecb_cold unsigned int ev_embeddable_backends (void) EV_NOEXCEPT { int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT | EVBACKEND_IOURING; /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ flags &= ~EVBACKEND_EPOLL; /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */ return flags; } unsigned int ev_backend (EV_P) EV_NOEXCEPT { return backend; } #if EV_FEATURE_API unsigned int ev_iteration (EV_P) EV_NOEXCEPT { return loop_count; } unsigned int ev_depth (EV_P) EV_NOEXCEPT { return loop_depth; } void ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT { io_blocktime = interval; } void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT { timeout_blocktime = interval; } void ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT { userdata = data; } void * ev_userdata (EV_P) EV_NOEXCEPT { return userdata; } void ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT { invoke_cb = invoke_pending_cb; } void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT { release_cb = release; acquire_cb = acquire; } #endif /* initialise a loop structure, must be zero-initialised */ ecb_noinline ecb_cold static void loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT { if (!backend) { origflags = flags; #if EV_USE_REALTIME if (!have_realtime) { struct timespec ts; if (!clock_gettime (CLOCK_REALTIME, &ts)) have_realtime = 1; } #endif #if EV_USE_MONOTONIC if (!have_monotonic) { struct timespec ts; if (!clock_gettime (CLOCK_MONOTONIC, &ts)) have_monotonic = 1; } #endif /* pid check not overridable via env */ #ifndef _WIN32 if (flags & EVFLAG_FORKCHECK) curpid = getpid (); #endif if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) flags = atoi (getenv ("LIBEV_FLAGS")); ev_rt_now = ev_time (); mn_now = get_clock (); now_floor = mn_now; rtmn_diff = ev_rt_now - mn_now; #if EV_FEATURE_API invoke_cb = ev_invoke_pending; #endif io_blocktime = 0.; timeout_blocktime = 0.; backend = 0; backend_fd = -1; sig_pending = 0; #if EV_ASYNC_ENABLE async_pending = 0; #endif pipe_write_skipped = 0; pipe_write_wanted = 0; evpipe [0] = -1; evpipe [1] = -1; #if EV_USE_INOTIFY fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; #endif #if EV_USE_SIGNALFD sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; #endif #if EV_USE_TIMERFD timerfd = flags & EVFLAG_NOTIMERFD ? -1 : -2; #endif if (!(flags & EVBACKEND_MASK)) flags |= ev_recommended_backends (); #if EV_USE_IOCP if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); #endif #if EV_USE_PORT if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); #endif #if EV_USE_KQUEUE if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags); #endif #if EV_USE_IOURING if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags); #endif #if EV_USE_LINUXAIO if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags); #endif #if EV_USE_EPOLL if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); #endif #if EV_USE_POLL if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); #endif #if EV_USE_SELECT if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags); #endif ev_prepare_init (&pending_w, pendingcb); #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE ev_init (&pipe_w, pipecb); ev_set_priority (&pipe_w, EV_MAXPRI); #endif } } /* free up a loop structure */ ecb_cold void ev_loop_destroy (EV_P) { int i; #if EV_MULTIPLICITY /* mimic free (0) */ if (!EV_A) return; #endif #if EV_CLEANUP_ENABLE /* queue cleanup watchers (and execute them) */ if (ecb_expect_false (cleanupcnt)) { queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP); EV_INVOKE_PENDING; } #endif #if EV_CHILD_ENABLE if (ev_is_default_loop (EV_A) && ev_is_active (&childev)) { ev_ref (EV_A); /* child watcher */ ev_signal_stop (EV_A_ &childev); } #endif if (ev_is_active (&pipe_w)) { /*ev_ref (EV_A);*/ /*ev_io_stop (EV_A_ &pipe_w);*/ if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]); if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]); } #if EV_USE_SIGNALFD if (ev_is_active (&sigfd_w)) close (sigfd); #endif #if EV_USE_TIMERFD if (ev_is_active (&timerfd_w)) close (timerfd); #endif #if EV_USE_INOTIFY if (fs_fd >= 0) close (fs_fd); #endif if (backend_fd >= 0) close (backend_fd); #if EV_USE_IOCP if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A); #endif #if EV_USE_PORT if (backend == EVBACKEND_PORT ) port_destroy (EV_A); #endif #if EV_USE_KQUEUE if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A); #endif #if EV_USE_IOURING if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A); #endif #if EV_USE_LINUXAIO if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A); #endif #if EV_USE_EPOLL if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); #endif #if EV_USE_POLL if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); #endif #if EV_USE_SELECT if (backend == EVBACKEND_SELECT ) select_destroy (EV_A); #endif for (i = NUMPRI; i--; ) { array_free (pending, [i]); #if EV_IDLE_ENABLE array_free (idle, [i]); #endif } ev_free (anfds); anfds = 0; anfdmax = 0; /* have to use the microsoft-never-gets-it-right macro */ array_free (rfeed, EMPTY); array_free (fdchange, EMPTY); array_free (timer, EMPTY); #if EV_PERIODIC_ENABLE array_free (periodic, EMPTY); #endif #if EV_FORK_ENABLE array_free (fork, EMPTY); #endif #if EV_CLEANUP_ENABLE array_free (cleanup, EMPTY); #endif array_free (prepare, EMPTY); array_free (check, EMPTY); #if EV_ASYNC_ENABLE array_free (async, EMPTY); #endif backend = 0; #if EV_MULTIPLICITY if (ev_is_default_loop (EV_A)) #endif ev_default_loop_ptr = 0; #if EV_MULTIPLICITY else ev_free (EV_A); #endif } #if EV_USE_INOTIFY inline_size void infy_fork (EV_P); #endif inline_size void loop_fork (EV_P) { #if EV_USE_PORT if (backend == EVBACKEND_PORT ) port_fork (EV_A); #endif #if EV_USE_KQUEUE if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A); #endif #if EV_USE_IOURING if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A); #endif #if EV_USE_LINUXAIO if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A); #endif #if EV_USE_EPOLL if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); #endif #if EV_USE_INOTIFY infy_fork (EV_A); #endif if (postfork != 2) { #if EV_USE_SIGNALFD /* surprisingly, nothing needs to be done for signalfd, accoridng to docs, it does the right thing on fork */ #endif #if EV_USE_TIMERFD if (ev_is_active (&timerfd_w)) { ev_ref (EV_A); ev_io_stop (EV_A_ &timerfd_w); close (timerfd); timerfd = -2; evtimerfd_init (EV_A); /* reschedule periodics, in case we missed something */ ev_feed_event (EV_A_ &timerfd_w, EV_CUSTOM); } #endif #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE if (ev_is_active (&pipe_w)) { /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ ev_ref (EV_A); ev_io_stop (EV_A_ &pipe_w); if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]); evpipe_init (EV_A); /* iterate over everything, in case we missed something before */ ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); } #endif } postfork = 0; } #if EV_MULTIPLICITY ecb_cold struct ev_loop * ev_loop_new (unsigned int flags) EV_NOEXCEPT { EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); memset (EV_A, 0, sizeof (struct ev_loop)); loop_init (EV_A_ flags); if (ev_backend (EV_A)) return EV_A; ev_free (EV_A); return 0; } #endif /* multiplicity */ #if EV_VERIFY ecb_noinline ecb_cold static void verify_watcher (EV_P_ W w) { assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); if (w->pending) assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); } ecb_noinline ecb_cold static void verify_heap (EV_P_ ANHE *heap, int N) { int i; for (i = HEAP0; i < N + HEAP0; ++i) { assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i)); assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i]))); assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i])))); verify_watcher (EV_A_ (W)ANHE_w (heap [i])); } } ecb_noinline ecb_cold static void array_verify (EV_P_ W *ws, int cnt) { while (cnt--) { assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); verify_watcher (EV_A_ ws [cnt]); } } #endif #if EV_FEATURE_API void ecb_cold ev_verify (EV_P) EV_NOEXCEPT { #if EV_VERIFY int i; WL w, w2; assert (activecnt >= -1); assert (fdchangemax >= fdchangecnt); for (i = 0; i < fdchangecnt; ++i) assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); assert (anfdmax >= 0); for (i = 0; i < anfdmax; ++i) { int j = 0; for (w = w2 = anfds [i].head; w; w = w->next) { verify_watcher (EV_A_ (W)w); if (j++ & 1) { assert (("libev: io watcher list contains a loop", w != w2)); w2 = w2->next; } assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); } } assert (timermax >= timercnt); verify_heap (EV_A_ timers, timercnt); #if EV_PERIODIC_ENABLE assert (periodicmax >= periodiccnt); verify_heap (EV_A_ periodics, periodiccnt); #endif for (i = NUMPRI; i--; ) { assert (pendingmax [i] >= pendingcnt [i]); #if EV_IDLE_ENABLE assert (idleall >= 0); assert (idlemax [i] >= idlecnt [i]); array_verify (EV_A_ (W *)idles [i], idlecnt [i]); #endif } #if EV_FORK_ENABLE assert (forkmax >= forkcnt); array_verify (EV_A_ (W *)forks, forkcnt); #endif #if EV_CLEANUP_ENABLE assert (cleanupmax >= cleanupcnt); array_verify (EV_A_ (W *)cleanups, cleanupcnt); #endif #if EV_ASYNC_ENABLE assert (asyncmax >= asynccnt); array_verify (EV_A_ (W *)asyncs, asynccnt); #endif #if EV_PREPARE_ENABLE assert (preparemax >= preparecnt); array_verify (EV_A_ (W *)prepares, preparecnt); #endif #if EV_CHECK_ENABLE assert (checkmax >= checkcnt); array_verify (EV_A_ (W *)checks, checkcnt); #endif # if 0 #if EV_CHILD_ENABLE for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) for (signum = EV_NSIG; signum--; ) if (signals [signum].pending) #endif # endif #endif } #endif #if EV_MULTIPLICITY ecb_cold struct ev_loop * #else int #endif ev_default_loop (unsigned int flags) EV_NOEXCEPT { if (!ev_default_loop_ptr) { #if EV_MULTIPLICITY EV_P = ev_default_loop_ptr = &default_loop_struct; #else ev_default_loop_ptr = 1; #endif loop_init (EV_A_ flags); if (ev_backend (EV_A)) { #if EV_CHILD_ENABLE ev_signal_init (&childev, childcb, SIGCHLD); ev_set_priority (&childev, EV_MAXPRI); ev_signal_start (EV_A_ &childev); ev_unref (EV_A); /* child watcher should not keep loop alive */ #endif } else ev_default_loop_ptr = 0; } return ev_default_loop_ptr; } void ev_loop_fork (EV_P) EV_NOEXCEPT { postfork = 1; } /*****************************************************************************/ void ev_invoke (EV_P_ void *w, int revents) { EV_CB_INVOKE ((W)w, revents); } unsigned int ev_pending_count (EV_P) EV_NOEXCEPT { int pri; unsigned int count = 0; for (pri = NUMPRI; pri--; ) count += pendingcnt [pri]; return count; } ecb_noinline void ev_invoke_pending (EV_P) { pendingpri = NUMPRI; do { --pendingpri; /* pendingpri possibly gets modified in the inner loop */ while (pendingcnt [pendingpri]) { ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri]; p->w->pending = 0; EV_CB_INVOKE (p->w, p->events); EV_FREQUENT_CHECK; } } while (pendingpri); } #if EV_IDLE_ENABLE /* make idle watchers pending. this handles the "call-idle */ /* only when higher priorities are idle" logic */ inline_size void idle_reify (EV_P) { if (ecb_expect_false (idleall)) { int pri; for (pri = NUMPRI; pri--; ) { if (pendingcnt [pri]) break; if (idlecnt [pri]) { queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); break; } } } } #endif /* make timers pending */ inline_size void timers_reify (EV_P) { EV_FREQUENT_CHECK; if (timercnt && ANHE_at (timers [HEAP0]) < mn_now) { do { ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/ /* first reschedule or stop timer */ if (w->repeat) { ev_at (w) += w->repeat; if (ev_at (w) < mn_now) ev_at (w) = mn_now; assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > EV_TS_CONST (0.))); ANHE_at_cache (timers [HEAP0]); downheap (timers, timercnt, HEAP0); } else ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ EV_FREQUENT_CHECK; feed_reverse (EV_A_ (W)w); } while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); feed_reverse_done (EV_A_ EV_TIMER); } } #if EV_PERIODIC_ENABLE ecb_noinline static void periodic_recalc (EV_P_ ev_periodic *w) { ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL; ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval); /* the above almost always errs on the low side */ while (at <= ev_rt_now) { ev_tstamp nat = at + w->interval; /* when resolution fails us, we use ev_rt_now */ if (ecb_expect_false (nat == at)) { at = ev_rt_now; break; } at = nat; } ev_at (w) = at; } /* make periodics pending */ inline_size void periodics_reify (EV_P) { EV_FREQUENT_CHECK; while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) { do { ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ /* first reschedule or stop timer */ if (w->reschedule_cb) { ev_at (w) = w->reschedule_cb (w, ev_rt_now); assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); ANHE_at_cache (periodics [HEAP0]); downheap (periodics, periodiccnt, HEAP0); } else if (w->interval) { periodic_recalc (EV_A_ w); ANHE_at_cache (periodics [HEAP0]); downheap (periodics, periodiccnt, HEAP0); } else ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ EV_FREQUENT_CHECK; feed_reverse (EV_A_ (W)w); } while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now); feed_reverse_done (EV_A_ EV_PERIODIC); } } /* simply recalculate all periodics */ /* TODO: maybe ensure that at least one event happens when jumping forward? */ ecb_noinline ecb_cold static void periodics_reschedule (EV_P) { int i; /* adjust periodics after time jump */ for (i = HEAP0; i < periodiccnt + HEAP0; ++i) { ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); if (w->reschedule_cb) ev_at (w) = w->reschedule_cb (w, ev_rt_now); else if (w->interval) periodic_recalc (EV_A_ w); ANHE_at_cache (periodics [i]); } reheap (periodics, periodiccnt); } #endif /* adjust all timers by a given offset */ ecb_noinline ecb_cold static void timers_reschedule (EV_P_ ev_tstamp adjust) { int i; for (i = 0; i < timercnt; ++i) { ANHE *he = timers + i + HEAP0; ANHE_w (*he)->at += adjust; ANHE_at_cache (*he); } } /* fetch new monotonic and realtime times from the kernel */ /* also detect if there was a timejump, and act accordingly */ inline_speed void time_update (EV_P_ ev_tstamp max_block) { #if EV_USE_MONOTONIC if (ecb_expect_true (have_monotonic)) { int i; ev_tstamp odiff = rtmn_diff; mn_now = get_clock (); /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ /* interpolate in the meantime */ if (ecb_expect_true (mn_now - now_floor < EV_TS_CONST (MIN_TIMEJUMP * .5))) { ev_rt_now = rtmn_diff + mn_now; return; } now_floor = mn_now; ev_rt_now = ev_time (); /* loop a few times, before making important decisions. * on the choice of "4": one iteration isn't enough, * in case we get preempted during the calls to * ev_time and get_clock. a second call is almost guaranteed * to succeed in that case, though. and looping a few more times * doesn't hurt either as we only do this on time-jumps or * in the unlikely event of having been preempted here. */ for (i = 4; --i; ) { ev_tstamp diff; rtmn_diff = ev_rt_now - mn_now; diff = odiff - rtmn_diff; if (ecb_expect_true ((diff < EV_TS_CONST (0.) ? -diff : diff) < EV_TS_CONST (MIN_TIMEJUMP))) return; /* all is well */ ev_rt_now = ev_time (); mn_now = get_clock (); now_floor = mn_now; } /* no timer adjustment, as the monotonic clock doesn't jump */ /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ # if EV_PERIODIC_ENABLE periodics_reschedule (EV_A); # endif } else #endif { ev_rt_now = ev_time (); if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + EV_TS_CONST (MIN_TIMEJUMP))) { /* adjust timers. this is easy, as the offset is the same for all of them */ timers_reschedule (EV_A_ ev_rt_now - mn_now); #if EV_PERIODIC_ENABLE periodics_reschedule (EV_A); #endif } mn_now = ev_rt_now; } } int ev_run (EV_P_ int flags) { #if EV_FEATURE_API ++loop_depth; #endif assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE)); loop_done = EVBREAK_CANCEL; EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ do { #if EV_VERIFY >= 2 ev_verify (EV_A); #endif #ifndef _WIN32 if (ecb_expect_false (curpid)) /* penalise the forking check even more */ if (ecb_expect_false (getpid () != curpid)) { curpid = getpid (); postfork = 1; } #endif #if EV_FORK_ENABLE /* we might have forked, so queue fork handlers */ if (ecb_expect_false (postfork)) if (forkcnt) { queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); EV_INVOKE_PENDING; } #endif #if EV_PREPARE_ENABLE /* queue prepare watchers (and execute them) */ if (ecb_expect_false (preparecnt)) { queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); EV_INVOKE_PENDING; } #endif if (ecb_expect_false (loop_done)) break; /* we might have forked, so reify kernel state if necessary */ if (ecb_expect_false (postfork)) loop_fork (EV_A); /* update fd-related kernel structures */ fd_reify (EV_A); /* calculate blocking time */ { ev_tstamp waittime = 0.; ev_tstamp sleeptime = 0.; /* remember old timestamp for io_blocktime calculation */ ev_tstamp prev_mn_now = mn_now; /* update time to cancel out callback processing overhead */ time_update (EV_A_ EV_TS_CONST (EV_TSTAMP_HUGE)); /* from now on, we want a pipe-wake-up */ pipe_write_wanted = 1; ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */ if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped))) { waittime = EV_TS_CONST (MAX_BLOCKTIME); #if EV_USE_TIMERFD /* sleep a lot longer when we can reliably detect timejumps */ if (ecb_expect_true (timerfd >= 0)) waittime = EV_TS_CONST (MAX_BLOCKTIME2); #endif #if !EV_PERIODIC_ENABLE /* without periodics but with monotonic clock there is no need */ /* for any time jump detection, so sleep longer */ if (ecb_expect_true (have_monotonic)) waittime = EV_TS_CONST (MAX_BLOCKTIME2); #endif if (timercnt) { ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now; if (waittime > to) waittime = to; } #if EV_PERIODIC_ENABLE if (periodiccnt) { ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now; if (waittime > to) waittime = to; } #endif /* don't let timeouts decrease the waittime below timeout_blocktime */ if (ecb_expect_false (waittime < timeout_blocktime)) waittime = timeout_blocktime; /* now there are two more special cases left, either we have * already-expired timers, so we should not sleep, or we have timers * that expire very soon, in which case we need to wait for a minimum * amount of time for some event loop backends. */ if (ecb_expect_false (waittime < backend_mintime)) waittime = waittime <= EV_TS_CONST (0.) ? EV_TS_CONST (0.) : backend_mintime; /* extra check because io_blocktime is commonly 0 */ if (ecb_expect_false (io_blocktime)) { sleeptime = io_blocktime - (mn_now - prev_mn_now); if (sleeptime > waittime - backend_mintime) sleeptime = waittime - backend_mintime; if (ecb_expect_true (sleeptime > EV_TS_CONST (0.))) { ev_sleep (sleeptime); waittime -= sleeptime; } } } #if EV_FEATURE_API ++loop_count; #endif assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ backend_poll (EV_A_ waittime); assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ pipe_write_wanted = 0; /* just an optimisation, no fence needed */ ECB_MEMORY_FENCE_ACQUIRE; if (pipe_write_skipped) { assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w))); ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); } /* update ev_rt_now, do magic */ time_update (EV_A_ waittime + sleeptime); } /* queue pending timers and reschedule them */ timers_reify (EV_A); /* relative timers called last */ #if EV_PERIODIC_ENABLE periodics_reify (EV_A); /* absolute timers called first */ #endif #if EV_IDLE_ENABLE /* queue idle watchers unless other events are pending */ idle_reify (EV_A); #endif #if EV_CHECK_ENABLE /* queue check watchers, to be executed first */ if (ecb_expect_false (checkcnt)) queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); #endif EV_INVOKE_PENDING; } while (ecb_expect_true ( activecnt && !loop_done && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT)) )); if (loop_done == EVBREAK_ONE) loop_done = EVBREAK_CANCEL; #if EV_FEATURE_API --loop_depth; #endif return activecnt; } void ev_break (EV_P_ int how) EV_NOEXCEPT { loop_done = how; } void ev_ref (EV_P) EV_NOEXCEPT { ++activecnt; } void ev_unref (EV_P) EV_NOEXCEPT { --activecnt; } void ev_now_update (EV_P) EV_NOEXCEPT { time_update (EV_A_ EV_TSTAMP_HUGE); } void ev_suspend (EV_P) EV_NOEXCEPT { ev_now_update (EV_A); } void ev_resume (EV_P) EV_NOEXCEPT { ev_tstamp mn_prev = mn_now; ev_now_update (EV_A); timers_reschedule (EV_A_ mn_now - mn_prev); #if EV_PERIODIC_ENABLE /* TODO: really do this? */ periodics_reschedule (EV_A); #endif } /*****************************************************************************/ /* singly-linked list management, used when the expected list length is short */ inline_size void wlist_add (WL *head, WL elem) { elem->next = *head; *head = elem; } inline_size void wlist_del (WL *head, WL elem) { while (*head) { if (ecb_expect_true (*head == elem)) { *head = elem->next; break; } head = &(*head)->next; } } /* internal, faster, version of ev_clear_pending */ inline_speed void clear_pending (EV_P_ W w) { if (w->pending) { pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w; w->pending = 0; } } int ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT { W w_ = (W)w; int pending = w_->pending; if (ecb_expect_true (pending)) { ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; p->w = (W)&pending_w; w_->pending = 0; return p->events; } else return 0; } inline_size void pri_adjust (EV_P_ W w) { int pri = ev_priority (w); pri = pri < EV_MINPRI ? EV_MINPRI : pri; pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; ev_set_priority (w, pri); } inline_speed void ev_start (EV_P_ W w, int active) { pri_adjust (EV_A_ w); w->active = active; ev_ref (EV_A); } inline_size void ev_stop (EV_P_ W w) { ev_unref (EV_A); w->active = 0; } /*****************************************************************************/ ecb_noinline void ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT { int fd = w->fd; if (ecb_expect_false (ev_is_active (w))) return; assert (("libev: ev_io_start called with negative fd", fd >= 0)); assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); #if EV_VERIFY >= 2 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd))); #endif EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, 1); array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill); wlist_add (&anfds[fd].head, (WL)w); /* common bug, apparently */ assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w)); fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); w->events &= ~EV__IOFDSET; EV_FREQUENT_CHECK; } ecb_noinline void ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT { clear_pending (EV_A_ (W)w); if (ecb_expect_false (!ev_is_active (w))) return; assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); #if EV_VERIFY >= 2 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd))); #endif EV_FREQUENT_CHECK; wlist_del (&anfds[w->fd].head, (WL)w); ev_stop (EV_A_ (W)w); fd_change (EV_A_ w->fd, EV_ANFD_REIFY); EV_FREQUENT_CHECK; } ecb_noinline void ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT { if (ecb_expect_false (ev_is_active (w))) return; ev_at (w) += mn_now; assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); EV_FREQUENT_CHECK; ++timercnt; ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit); ANHE_w (timers [ev_active (w)]) = (WT)w; ANHE_at_cache (timers [ev_active (w)]); upheap (timers, ev_active (w)); EV_FREQUENT_CHECK; /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ } ecb_noinline void ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT { clear_pending (EV_A_ (W)w); if (ecb_expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); --timercnt; if (ecb_expect_true (active < timercnt + HEAP0)) { timers [active] = timers [timercnt + HEAP0]; adjustheap (timers, timercnt, active); } } ev_at (w) -= mn_now; ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } ecb_noinline void ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT { EV_FREQUENT_CHECK; clear_pending (EV_A_ (W)w); if (ev_is_active (w)) { if (w->repeat) { ev_at (w) = mn_now + w->repeat; ANHE_at_cache (timers [ev_active (w)]); adjustheap (timers, timercnt, ev_active (w)); } else ev_timer_stop (EV_A_ w); } else if (w->repeat) { ev_at (w) = w->repeat; ev_timer_start (EV_A_ w); } EV_FREQUENT_CHECK; } ev_tstamp ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT { return ev_at (w) - (ev_is_active (w) ? mn_now : EV_TS_CONST (0.)); } #if EV_PERIODIC_ENABLE ecb_noinline void ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT { if (ecb_expect_false (ev_is_active (w))) return; #if EV_USE_TIMERFD if (timerfd == -2) evtimerfd_init (EV_A); #endif if (w->reschedule_cb) ev_at (w) = w->reschedule_cb (w, ev_rt_now); else if (w->interval) { assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); periodic_recalc (EV_A_ w); } else ev_at (w) = w->offset; EV_FREQUENT_CHECK; ++periodiccnt; ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit); ANHE_w (periodics [ev_active (w)]) = (WT)w; ANHE_at_cache (periodics [ev_active (w)]); upheap (periodics, ev_active (w)); EV_FREQUENT_CHECK; /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ } ecb_noinline void ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT { clear_pending (EV_A_ (W)w); if (ecb_expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); --periodiccnt; if (ecb_expect_true (active < periodiccnt + HEAP0)) { periodics [active] = periodics [periodiccnt + HEAP0]; adjustheap (periodics, periodiccnt, active); } } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } ecb_noinline void ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT { /* TODO: use adjustheap and recalculation */ ev_periodic_stop (EV_A_ w); ev_periodic_start (EV_A_ w); } #endif #ifndef SA_RESTART # define SA_RESTART 0 #endif #if EV_SIGNAL_ENABLE ecb_noinline void ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT { if (ecb_expect_false (ev_is_active (w))) return; assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); #if EV_MULTIPLICITY assert (("libev: a signal must not be attached to two different loops", !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); signals [w->signum - 1].loop = EV_A; ECB_MEMORY_FENCE_RELEASE; #endif EV_FREQUENT_CHECK; #if EV_USE_SIGNALFD if (sigfd == -2) { sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC); if (sigfd < 0 && errno == EINVAL) sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */ if (sigfd >= 0) { fd_intern (sigfd); /* doing it twice will not hurt */ sigemptyset (&sigfd_set); ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ); ev_set_priority (&sigfd_w, EV_MAXPRI); ev_io_start (EV_A_ &sigfd_w); ev_unref (EV_A); /* signalfd watcher should not keep loop alive */ } } if (sigfd >= 0) { /* TODO: check .head */ sigaddset (&sigfd_set, w->signum); sigprocmask (SIG_BLOCK, &sigfd_set, 0); signalfd (sigfd, &sigfd_set, 0); } #endif ev_start (EV_A_ (W)w, 1); wlist_add (&signals [w->signum - 1].head, (WL)w); if (!((WL)w)->next) # if EV_USE_SIGNALFD if (sigfd < 0) /*TODO*/ # endif { # ifdef _WIN32 evpipe_init (EV_A); signal (w->signum, ev_sighandler); # else struct sigaction sa; evpipe_init (EV_A); sa.sa_handler = ev_sighandler; sigfillset (&sa.sa_mask); sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ sigaction (w->signum, &sa, 0); if (origflags & EVFLAG_NOSIGMASK) { sigemptyset (&sa.sa_mask); sigaddset (&sa.sa_mask, w->signum); sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); } #endif } EV_FREQUENT_CHECK; } ecb_noinline void ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT { clear_pending (EV_A_ (W)w); if (ecb_expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; wlist_del (&signals [w->signum - 1].head, (WL)w); ev_stop (EV_A_ (W)w); if (!signals [w->signum - 1].head) { #if EV_MULTIPLICITY signals [w->signum - 1].loop = 0; /* unattach from signal */ #endif #if EV_USE_SIGNALFD if (sigfd >= 0) { sigset_t ss; sigemptyset (&ss); sigaddset (&ss, w->signum); sigdelset (&sigfd_set, w->signum); signalfd (sigfd, &sigfd_set, 0); sigprocmask (SIG_UNBLOCK, &ss, 0); } else #endif signal (w->signum, SIG_DFL); } EV_FREQUENT_CHECK; } #endif #if EV_CHILD_ENABLE void ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT { #if EV_MULTIPLICITY assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); #endif if (ecb_expect_false (ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, 1); wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); EV_FREQUENT_CHECK; } void ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT { clear_pending (EV_A_ (W)w); if (ecb_expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } #endif #if EV_STAT_ENABLE # ifdef _WIN32 # undef lstat # define lstat(a,b) _stati64 (a,b) # endif #define DEF_STAT_INTERVAL 5.0074891 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ #define MIN_STAT_INTERVAL 0.1074891 ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents); #if EV_USE_INOTIFY /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) ecb_noinline static void infy_add (EV_P_ ev_stat *w) { w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO | IN_DONT_FOLLOW | IN_MASK_ADD); if (w->wd >= 0) { struct statfs sfs; /* now local changes will be tracked by inotify, but remote changes won't */ /* unless the filesystem is known to be local, we therefore still poll */ /* also do poll on <2.6.25, but with normal frequency */ if (!fs_2625) w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; else if (!statfs (w->path, &sfs) && (sfs.f_type == 0x1373 /* devfs */ || sfs.f_type == 0x4006 /* fat */ || sfs.f_type == 0x4d44 /* msdos */ || sfs.f_type == 0xEF53 /* ext2/3 */ || sfs.f_type == 0x72b6 /* jffs2 */ || sfs.f_type == 0x858458f6 /* ramfs */ || sfs.f_type == 0x5346544e /* ntfs */ || sfs.f_type == 0x3153464a /* jfs */ || sfs.f_type == 0x9123683e /* btrfs */ || sfs.f_type == 0x52654973 /* reiser3 */ || sfs.f_type == 0x01021994 /* tmpfs */ || sfs.f_type == 0x58465342 /* xfs */)) w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ else w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ } else { /* can't use inotify, continue to stat */ w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; /* if path is not there, monitor some parent directory for speedup hints */ /* note that exceeding the hardcoded path limit is not a correctness issue, */ /* but an efficiency issue only */ if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) { char path [4096]; strcpy (path, w->path); do { int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); char *pend = strrchr (path, '/'); if (!pend || pend == path) break; *pend = 0; w->wd = inotify_add_watch (fs_fd, path, mask); } while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); } } if (w->wd >= 0) wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); /* now re-arm timer, if required */ if (ev_is_active (&w->timer)) ev_ref (EV_A); ev_timer_again (EV_A_ &w->timer); if (ev_is_active (&w->timer)) ev_unref (EV_A); } ecb_noinline static void infy_del (EV_P_ ev_stat *w) { int slot; int wd = w->wd; if (wd < 0) return; w->wd = -2; slot = wd & ((EV_INOTIFY_HASHSIZE) - 1); wlist_del (&fs_hash [slot].head, (WL)w); /* remove this watcher, if others are watching it, they will rearm */ inotify_rm_watch (fs_fd, wd); } ecb_noinline static void infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) { if (slot < 0) /* overflow, need to check for all hash slots */ for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) infy_wd (EV_A_ slot, wd, ev); else { WL w_; for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; ) { ev_stat *w = (ev_stat *)w_; w_ = w_->next; /* lets us remove this watcher and all before it */ if (w->wd == wd || wd == -1) { if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) { wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); w->wd = -1; infy_add (EV_A_ w); /* re-add, no matter what */ } stat_timer_cb (EV_A_ &w->timer, 0); } } } } static void infy_cb (EV_P_ ev_io *w, int revents) { char buf [EV_INOTIFY_BUFSIZE]; int ofs; int len = read (fs_fd, buf, sizeof (buf)); for (ofs = 0; ofs < len; ) { struct inotify_event *ev = (struct inotify_event *)(buf + ofs); infy_wd (EV_A_ ev->wd, ev->wd, ev); ofs += sizeof (struct inotify_event) + ev->len; } } inline_size ecb_cold void ev_check_2625 (EV_P) { /* kernels < 2.6.25 are borked * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html */ if (ev_linux_version () < 0x020619) return; fs_2625 = 1; } inline_size int infy_newfd (void) { #if defined IN_CLOEXEC && defined IN_NONBLOCK int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); if (fd >= 0) return fd; #endif return inotify_init (); } inline_size void infy_init (EV_P) { if (fs_fd != -2) return; fs_fd = -1; ev_check_2625 (EV_A); fs_fd = infy_newfd (); if (fs_fd >= 0) { fd_intern (fs_fd); ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); ev_set_priority (&fs_w, EV_MAXPRI); ev_io_start (EV_A_ &fs_w); ev_unref (EV_A); } } inline_size void infy_fork (EV_P) { int slot; if (fs_fd < 0) return; ev_ref (EV_A); ev_io_stop (EV_A_ &fs_w); close (fs_fd); fs_fd = infy_newfd (); if (fs_fd >= 0) { fd_intern (fs_fd); ev_io_set (&fs_w, fs_fd, EV_READ); ev_io_start (EV_A_ &fs_w); ev_unref (EV_A); } for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) { WL w_ = fs_hash [slot].head; fs_hash [slot].head = 0; while (w_) { ev_stat *w = (ev_stat *)w_; w_ = w_->next; /* lets us add this watcher */ w->wd = -1; if (fs_fd >= 0) infy_add (EV_A_ w); /* re-add, no matter what */ else { w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; if (ev_is_active (&w->timer)) ev_ref (EV_A); ev_timer_again (EV_A_ &w->timer); if (ev_is_active (&w->timer)) ev_unref (EV_A); } } } } #endif #ifdef _WIN32 # define EV_LSTAT(p,b) _stati64 (p, b) #else # define EV_LSTAT(p,b) lstat (p, b) #endif void ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT { if (lstat (w->path, &w->attr) < 0) w->attr.st_nlink = 0; else if (!w->attr.st_nlink) w->attr.st_nlink = 1; } ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents) { ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); ev_statdata prev = w->attr; ev_stat_stat (EV_A_ w); /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ if ( prev.st_dev != w->attr.st_dev || prev.st_ino != w->attr.st_ino || prev.st_mode != w->attr.st_mode || prev.st_nlink != w->attr.st_nlink || prev.st_uid != w->attr.st_uid || prev.st_gid != w->attr.st_gid || prev.st_rdev != w->attr.st_rdev || prev.st_size != w->attr.st_size || prev.st_atime != w->attr.st_atime || prev.st_mtime != w->attr.st_mtime || prev.st_ctime != w->attr.st_ctime ) { /* we only update w->prev on actual differences */ /* in case we test more often than invoke the callback, */ /* to ensure that prev is always different to attr */ w->prev = prev; #if EV_USE_INOTIFY if (fs_fd >= 0) { infy_del (EV_A_ w); infy_add (EV_A_ w); ev_stat_stat (EV_A_ w); /* avoid race... */ } #endif ev_feed_event (EV_A_ w, EV_STAT); } } void ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT { if (ecb_expect_false (ev_is_active (w))) return; ev_stat_stat (EV_A_ w); if (w->interval < MIN_STAT_INTERVAL && w->interval) w->interval = MIN_STAT_INTERVAL; ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL); ev_set_priority (&w->timer, ev_priority (w)); #if EV_USE_INOTIFY infy_init (EV_A); if (fs_fd >= 0) infy_add (EV_A_ w); else #endif { ev_timer_again (EV_A_ &w->timer); ev_unref (EV_A); } ev_start (EV_A_ (W)w, 1); EV_FREQUENT_CHECK; } void ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT { clear_pending (EV_A_ (W)w); if (ecb_expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; #if EV_USE_INOTIFY infy_del (EV_A_ w); #endif if (ev_is_active (&w->timer)) { ev_ref (EV_A); ev_timer_stop (EV_A_ &w->timer); } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } #endif #if EV_IDLE_ENABLE void ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT { if (ecb_expect_false (ev_is_active (w))) return; pri_adjust (EV_A_ (W)w); EV_FREQUENT_CHECK; { int active = ++idlecnt [ABSPRI (w)]; ++idleall; ev_start (EV_A_ (W)w, active); array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit); idles [ABSPRI (w)][active - 1] = w; } EV_FREQUENT_CHECK; } void ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT { clear_pending (EV_A_ (W)w); if (ecb_expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; ev_active (idles [ABSPRI (w)][active - 1]) = active; ev_stop (EV_A_ (W)w); --idleall; } EV_FREQUENT_CHECK; } #endif #if EV_PREPARE_ENABLE void ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT { if (ecb_expect_false (ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, ++preparecnt); array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit); prepares [preparecnt - 1] = w; EV_FREQUENT_CHECK; } void ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT { clear_pending (EV_A_ (W)w); if (ecb_expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); prepares [active - 1] = prepares [--preparecnt]; ev_active (prepares [active - 1]) = active; } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } #endif #if EV_CHECK_ENABLE void ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT { if (ecb_expect_false (ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, ++checkcnt); array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit); checks [checkcnt - 1] = w; EV_FREQUENT_CHECK; } void ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT { clear_pending (EV_A_ (W)w); if (ecb_expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); checks [active - 1] = checks [--checkcnt]; ev_active (checks [active - 1]) = active; } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } #endif #if EV_EMBED_ENABLE ecb_noinline void ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT { ev_run (w->other, EVRUN_NOWAIT); } static void embed_io_cb (EV_P_ ev_io *io, int revents) { ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); if (ev_cb (w)) ev_feed_event (EV_A_ (W)w, EV_EMBED); else ev_run (w->other, EVRUN_NOWAIT); } static void embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) { ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); { EV_P = w->other; while (fdchangecnt) { fd_reify (EV_A); ev_run (EV_A_ EVRUN_NOWAIT); } } } #if EV_FORK_ENABLE static void embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) { ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); ev_embed_stop (EV_A_ w); { EV_P = w->other; ev_loop_fork (EV_A); ev_run (EV_A_ EVRUN_NOWAIT); } ev_embed_start (EV_A_ w); } #endif #if 0 static void embed_idle_cb (EV_P_ ev_idle *idle, int revents) { ev_idle_stop (EV_A_ idle); } #endif void ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT { if (ecb_expect_false (ev_is_active (w))) return; { EV_P = w->other; assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); } EV_FREQUENT_CHECK; ev_set_priority (&w->io, ev_priority (w)); ev_io_start (EV_A_ &w->io); ev_prepare_init (&w->prepare, embed_prepare_cb); ev_set_priority (&w->prepare, EV_MINPRI); ev_prepare_start (EV_A_ &w->prepare); #if EV_FORK_ENABLE ev_fork_init (&w->fork, embed_fork_cb); ev_fork_start (EV_A_ &w->fork); #endif /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ ev_start (EV_A_ (W)w, 1); EV_FREQUENT_CHECK; } void ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT { clear_pending (EV_A_ (W)w); if (ecb_expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_io_stop (EV_A_ &w->io); ev_prepare_stop (EV_A_ &w->prepare); #if EV_FORK_ENABLE ev_fork_stop (EV_A_ &w->fork); #endif ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } #endif #if EV_FORK_ENABLE void ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT { if (ecb_expect_false (ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, ++forkcnt); array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit); forks [forkcnt - 1] = w; EV_FREQUENT_CHECK; } void ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT { clear_pending (EV_A_ (W)w); if (ecb_expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); forks [active - 1] = forks [--forkcnt]; ev_active (forks [active - 1]) = active; } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } #endif #if EV_CLEANUP_ENABLE void ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT { if (ecb_expect_false (ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, ++cleanupcnt); array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit); cleanups [cleanupcnt - 1] = w; /* cleanup watchers should never keep a refcount on the loop */ ev_unref (EV_A); EV_FREQUENT_CHECK; } void ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT { clear_pending (EV_A_ (W)w); if (ecb_expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; ev_ref (EV_A); { int active = ev_active (w); cleanups [active - 1] = cleanups [--cleanupcnt]; ev_active (cleanups [active - 1]) = active; } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } #endif #if EV_ASYNC_ENABLE void ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT { if (ecb_expect_false (ev_is_active (w))) return; w->sent = 0; evpipe_init (EV_A); EV_FREQUENT_CHECK; ev_start (EV_A_ (W)w, ++asynccnt); array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit); asyncs [asynccnt - 1] = w; EV_FREQUENT_CHECK; } void ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT { clear_pending (EV_A_ (W)w); if (ecb_expect_false (!ev_is_active (w))) return; EV_FREQUENT_CHECK; { int active = ev_active (w); asyncs [active - 1] = asyncs [--asynccnt]; ev_active (asyncs [active - 1]) = active; } ev_stop (EV_A_ (W)w); EV_FREQUENT_CHECK; } void ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT { w->sent = 1; evpipe_write (EV_A_ &async_pending); } #endif /*****************************************************************************/ struct ev_once { ev_io io; ev_timer to; void (*cb)(int revents, void *arg); void *arg; }; static void once_cb (EV_P_ struct ev_once *once, int revents) { void (*cb)(int revents, void *arg) = once->cb; void *arg = once->arg; ev_io_stop (EV_A_ &once->io); ev_timer_stop (EV_A_ &once->to); ev_free (once); cb (revents, arg); } static void once_cb_io (EV_P_ ev_io *w, int revents) { struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)); once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to)); } static void once_cb_to (EV_P_ ev_timer *w, int revents) { struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)); once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); } void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT { struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); once->cb = cb; once->arg = arg; ev_init (&once->io, once_cb_io); if (fd >= 0) { ev_io_set (&once->io, fd, events); ev_io_start (EV_A_ &once->io); } ev_init (&once->to, once_cb_to); if (timeout >= 0.) { ev_timer_set (&once->to, timeout, 0.); ev_timer_start (EV_A_ &once->to); } } /*****************************************************************************/ #if EV_WALK_ENABLE ecb_cold void ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT { int i, j; ev_watcher_list *wl, *wn; if (types & (EV_IO | EV_EMBED)) for (i = 0; i < anfdmax; ++i) for (wl = anfds [i].head; wl; ) { wn = wl->next; #if EV_EMBED_ENABLE if (ev_cb ((ev_io *)wl) == embed_io_cb) { if (types & EV_EMBED) cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io)); } else #endif #if EV_USE_INOTIFY if (ev_cb ((ev_io *)wl) == infy_cb) ; else #endif if ((ev_io *)wl != &pipe_w) if (types & EV_IO) cb (EV_A_ EV_IO, wl); wl = wn; } if (types & (EV_TIMER | EV_STAT)) for (i = timercnt + HEAP0; i-- > HEAP0; ) #if EV_STAT_ENABLE /*TODO: timer is not always active*/ if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb) { if (types & EV_STAT) cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer)); } else #endif if (types & EV_TIMER) cb (EV_A_ EV_TIMER, ANHE_w (timers [i])); #if EV_PERIODIC_ENABLE if (types & EV_PERIODIC) for (i = periodiccnt + HEAP0; i-- > HEAP0; ) cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); #endif #if EV_IDLE_ENABLE if (types & EV_IDLE) for (j = NUMPRI; j--; ) for (i = idlecnt [j]; i--; ) cb (EV_A_ EV_IDLE, idles [j][i]); #endif #if EV_FORK_ENABLE if (types & EV_FORK) for (i = forkcnt; i--; ) if (ev_cb (forks [i]) != embed_fork_cb) cb (EV_A_ EV_FORK, forks [i]); #endif #if EV_ASYNC_ENABLE if (types & EV_ASYNC) for (i = asynccnt; i--; ) cb (EV_A_ EV_ASYNC, asyncs [i]); #endif #if EV_PREPARE_ENABLE if (types & EV_PREPARE) for (i = preparecnt; i--; ) # if EV_EMBED_ENABLE if (ev_cb (prepares [i]) != embed_prepare_cb) # endif cb (EV_A_ EV_PREPARE, prepares [i]); #endif #if EV_CHECK_ENABLE if (types & EV_CHECK) for (i = checkcnt; i--; ) cb (EV_A_ EV_CHECK, checks [i]); #endif #if EV_SIGNAL_ENABLE if (types & EV_SIGNAL) for (i = 0; i < EV_NSIG - 1; ++i) for (wl = signals [i].head; wl; ) { wn = wl->next; cb (EV_A_ EV_SIGNAL, wl); wl = wn; } #endif #if EV_CHILD_ENABLE if (types & EV_CHILD) for (i = (EV_PID_HASHSIZE); i--; ) for (wl = childs [i]; wl; ) { wn = wl->next; cb (EV_A_ EV_CHILD, wl); wl = wn; } #endif /* EV_STAT 0x00001000 /* stat data changed */ /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ } #endif #if EV_MULTIPLICITY #include "ev_wrap.h" #endif libev-4.33/event.c0000644000000000000000000002333613531446730010735 00000000000000/* * libevent compatibility layer * * Copyright (c) 2007,2008,2009,2010,2012 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #include #include #include #ifdef EV_EVENT_H # include EV_EVENT_H #else # include "event.h" #endif #if EV_MULTIPLICITY # define dLOOPev struct ev_loop *loop = (struct ev_loop *)ev->ev_base # define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base #else # define dLOOPev # define dLOOPbase #endif /* never accessed, will always be cast from/to ev_loop */ struct event_base { int dummy; }; static struct event_base *ev_x_cur; static ev_tstamp ev_tv_get (struct timeval *tv) { if (tv) { ev_tstamp after = tv->tv_sec + tv->tv_usec * 1e-6; return after ? after : 1e-6; } else return -1.; } #define EVENT_STRINGIFY(s) # s #define EVENT_VERSION(a,b) EVENT_STRINGIFY (a) "." EVENT_STRINGIFY (b) const char * event_get_version (void) { /* returns ABI, not API or library, version */ return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); } const char * event_get_method (void) { return "libev"; } void *event_init (void) { #if EV_MULTIPLICITY if (ev_x_cur) ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO); else ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO); #else assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur)); ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO); #endif return ev_x_cur; } const char * event_base_get_method (const struct event_base *base) { return "libev"; } struct event_base * event_base_new (void) { #if EV_MULTIPLICITY return (struct event_base *)ev_loop_new (EVFLAG_AUTO); #else assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY")); return NULL; #endif } void event_base_free (struct event_base *base) { dLOOPbase; #if EV_MULTIPLICITY if (!ev_is_default_loop (loop)) ev_loop_destroy (loop); #endif } int event_dispatch (void) { return event_base_dispatch (ev_x_cur); } #ifdef EV_STANDALONE void event_set_log_callback (event_log_cb cb) { /* nop */ } #endif int event_loop (int flags) { return event_base_loop (ev_x_cur, flags); } int event_loopexit (struct timeval *tv) { return event_base_loopexit (ev_x_cur, tv); } event_callback_fn event_get_callback (const struct event *ev) { return ev->ev_callback; } static void ev_x_cb (struct event *ev, int revents) { revents &= EV_READ | EV_WRITE | EV_TIMER | EV_SIGNAL; ev->ev_res = revents; ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg); } static void ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents) { struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig)); if (revents & EV_ERROR) event_del (ev); ev_x_cb (ev, revents); } static void ev_x_cb_io (EV_P_ struct ev_io *w, int revents) { struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io)); if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST)) event_del (ev); ev_x_cb (ev, revents); } static void ev_x_cb_to (EV_P_ struct ev_timer *w, int revents) { struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to)); event_del (ev); ev_x_cb (ev, revents); } void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg) { if (events & EV_SIGNAL) ev_init (&ev->iosig.sig, ev_x_cb_sig); else ev_init (&ev->iosig.io, ev_x_cb_io); ev_init (&ev->to, ev_x_cb_to); ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */ ev->ev_fd = fd; ev->ev_events = events; ev->ev_pri = 0; ev->ev_callback = cb; ev->ev_arg = arg; ev->ev_res = 0; ev->ev_flags = EVLIST_INIT; } int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) { return event_base_once (ev_x_cur, fd, events, cb, arg, tv); } int event_add (struct event *ev, struct timeval *tv) { dLOOPev; if (ev->ev_events & EV_SIGNAL) { if (!ev_is_active (&ev->iosig.sig)) { ev_signal_set (&ev->iosig.sig, ev->ev_fd); ev_signal_start (EV_A_ &ev->iosig.sig); ev->ev_flags |= EVLIST_SIGNAL; } } else if (ev->ev_events & (EV_READ | EV_WRITE)) { if (!ev_is_active (&ev->iosig.io)) { ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE)); ev_io_start (EV_A_ &ev->iosig.io); ev->ev_flags |= EVLIST_INSERTED; } } if (tv) { ev->to.repeat = ev_tv_get (tv); ev_timer_again (EV_A_ &ev->to); ev->ev_flags |= EVLIST_TIMEOUT; } else { ev_timer_stop (EV_A_ &ev->to); ev->ev_flags &= ~EVLIST_TIMEOUT; } ev->ev_flags |= EVLIST_ACTIVE; return 0; } int event_del (struct event *ev) { dLOOPev; if (ev->ev_events & EV_SIGNAL) ev_signal_stop (EV_A_ &ev->iosig.sig); else if (ev->ev_events & (EV_READ | EV_WRITE)) ev_io_stop (EV_A_ &ev->iosig.io); if (ev_is_active (&ev->to)) ev_timer_stop (EV_A_ &ev->to); ev->ev_flags = EVLIST_INIT; return 0; } void event_active (struct event *ev, int res, short ncalls) { dLOOPev; if (res & EV_TIMEOUT) ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT); if (res & EV_SIGNAL) ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL); if (res & (EV_READ | EV_WRITE)) ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ | EV_WRITE)); } int event_pending (struct event *ev, short events, struct timeval *tv) { short revents = 0; dLOOPev; if (ev->ev_events & EV_SIGNAL) { /* sig */ if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig)) revents |= EV_SIGNAL; } else if (ev->ev_events & (EV_READ | EV_WRITE)) { /* io */ if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io)) revents |= ev->ev_events & (EV_READ | EV_WRITE); } if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to)) { revents |= EV_TIMEOUT; if (tv) { ev_tstamp at = ev_now (EV_A); tv->tv_sec = (long)at; tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6); } } return events & revents; } int event_priority_init (int npri) { return event_base_priority_init (ev_x_cur, npri); } int event_priority_set (struct event *ev, int pri) { ev->ev_pri = pri; return 0; } int event_base_set (struct event_base *base, struct event *ev) { ev->ev_base = base; return 0; } int event_base_loop (struct event_base *base, int flags) { dLOOPbase; return !ev_run (EV_A_ flags); } int event_base_dispatch (struct event_base *base) { return event_base_loop (base, 0); } static void ev_x_loopexit_cb (int revents, void *base) { dLOOPbase; ev_break (EV_A_ EVBREAK_ONE); } int event_base_loopexit (struct event_base *base, struct timeval *tv) { ev_tstamp after = ev_tv_get (tv); dLOOPbase; ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base); return 0; } struct ev_x_once { int fd; void (*cb)(int, short, void *); void *arg; }; static void ev_x_once_cb (int revents, void *arg) { struct ev_x_once *once = (struct ev_x_once *)arg; once->cb (once->fd, (short)revents, once->arg); free (once); } int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) { struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once)); dLOOPbase; if (!once) return -1; once->fd = fd; once->cb = cb; once->arg = arg; ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once); return 0; } int event_base_priority_init (struct event_base *base, int npri) { /*dLOOPbase;*/ return 0; } libev-4.33/LICENSE0000644000000000000000000000400712337443634010452 00000000000000All files in libev are Copyright (c)2007,2008,2009,2010,2011,2012,2013 Marc Alexander Lehmann. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Alternatively, the contents of this package may be used under the terms of the GNU General Public License ("GPL") version 2 or any later version, in which case the provisions of the GPL are applicable instead of the above. If you wish to allow the use of your version of this package only under the terms of the GPL and not to allow others to use your version of this file under the BSD license, indicate your decision by deleting the provisions above and replace them with the notice and other provisions required by the GPL in this and the other files of this package. If you do not delete the provisions above, a recipient may use your version of this file under either the BSD or the GPL. libev-4.33/Changes0000644000000000000000000007750313634411252010743 00000000000000Revision history for libev, a high-performance and full-featured event loop. TODO: for next ABI/API change, consider moving EV__IOFDSSET into io->fd instead and provide a getter. TODO: document EV_TSTAMP_T 4.33 Wed Mar 18 13:22:29 CET 2020 - no changes w.r.t. 4.32. 4.32 (EV only) - the 4.31 timerfd code wrongly changed the priority of the signal fd watcher, which is usually harmless unless signal fds are also used (found via cpan tester service). - the documentation wrongly claimed that user may modify fd and events members in io watchers when the watcher was stopped (found by b_jonas). - new ev_io_modify mutator which changes only the events member, which can be faster. also added ev::io::set (int events) method to ev++.h. - officially allow a zero events mask for io watchers. this should work with older libev versions as well but was not officially allowed before. - do not wake up every minute when timerfd is used to detect timejumps. - do not wake up every minute when periodics are disabled and we have a monotonic clock. - support a lot more "uncommon" compile time configurations, such as ev_embed enabled but ev_timer disabled. - use a start/stop wrapper class to reduce code duplication in ev++.h and make it needlessly more c++-y. - the linux aio backend is no longer compiled in by default. - update to libecb version 0x00010008. 4.31 Fri Dec 20 21:58:29 CET 2019 - handle backends with minimum wait time a bit better by not waiting in the presence of already-expired timers (behaviour reported by Felipe Gasper). - new feature: use timerfd to detect timejumps quickly, can be disabled with the new EVFLAG_NOTIMERFD loop flag. - document EV_USE_SIGNALFD feature macro. 4.30 (EV only) - change non-autoconf test for __kernel_rwf_t by testing LINUX_VERSION_CODE, the most direct test I could find. - fix a bug in the io_uring backend that polled the wrong backend fd, causing it to not work in many cases. 4.29 (EV only) - add io uring autoconf and non-autoconf detection. - disable io_uring when some header files are too old. 4.28 (EV only) - linuxaio backend resulted in random memory corruption when loop is forked. - linuxaio backend might have tried to cancel an iocb multiple times (was unable to trigger this). - linuxaio backend now employs a generation counter to avoid handling spurious events from cancelled requests. - io_cancel can return EINTR, deal with it. also, assume io_submit also returns EINTR. - fix some other minor bugs in linuxaio backend. - ev_tstamp type can now be overriden by defining EV_TSTAMP_T. - cleanup: replace expect_true/false and noinline by their libecb counterparts. - move syscall infrastructure from ev_linuxaio.c to ev.c. - prepare io_uring integration. - tweak ev_floor. - epoll, poll, win32 Sleep and other places that use millisecond reslution now all try to round up times. - solaris port backend didn't compile. - abstract time constants into their macros, for more flexibility. 4.27 Thu Jun 27 22:43:44 CEST 2019 - linux aio backend almost completely rewritten to work around its limitations. - linux aio backend now requires linux 4.19+. - epoll backend now mandatory for linux aio backend. - fail assertions more aggressively on invalid fd's detected in the event loop, do not just silently fd_kill in case of user error. - ev_io_start/ev_io_stop now verify the watcher fd using a syscall when EV_VERIFY is 2 or higher. 4.26 (EV only) - update to libecb 0x00010006. - new experimental linux aio backend (linux 4.18+). - removed redundant 0-ptr check in ev_once. - updated/extended ev_set_allocator documentation. - replaced EMPTY2 macro by array_needsize_noinit. - minor code cleanups. - epoll backend now uses epoll_create1 also after fork. 4.25 Fri Dec 21 07:49:20 CET 2018 - INCOMPATIBLE CHANGE: EV_THROW was renamed to EV_NOEXCEPT (EV_THROW still provided) and now uses noexcept on C++11 or newer. - move the darwin select workaround higher in ev.c, as newer versions of darwin managed to break their broken select even more. - ANDROID => __ANDROID__ (reported by enh@google.com). - disable epoll_create1 on android because it has broken header files and google is unwilling to fix them (reported by enh@google.com). - avoid a minor compilation warning on win32. - c++: remove deprecated dynamic throw() specifications. - c++: improve the (unsupported) bad_loop exception class. - backport perl ev_periodic example to C, untested. - update libecb, biggets change is to include a memory fence in ECB_MEMORY_FENCE_RELEASE on x86/amd64. - minor autoconf/automake modernisation. 4.24 Wed Dec 28 05:19:55 CET 2016 - bump version to 4.24, as the release tarball inexplicably didn't have the right version in ev.h, even though the cvs-tagged version did have the right one (reported by Ales Teska). 4.23 Wed Nov 16 18:23:41 CET 2016 - move some declarations at the beginning to help certain retarded microsoft compilers, even though their documentation claims otherwise (reported by Ruslan Osmanov). 4.22 Sun Dec 20 22:11:50 CET 2015 - when epoll detects unremovable fds in the fd set, rebuild only the epoll descriptor, not the signal pipe, to avoid SIGPIPE in ev_async_send. This doesn't solve it on fork, so document what needs to be done in ev_loop_fork (analyzed by Benjamin Mahler). - remove superfluous sys/timeb.h include on win32 (analyzed by Jason Madden). - updated libecb. 4.20 Sat Jun 20 13:01:43 CEST 2015 - prefer noexcept over throw () with C++ 11. - update ecb.h due to incompatibilities with c11. - fix a potential aliasing issue when reading and writing watcher callbacks. 4.19 Thu Sep 25 08:18:25 CEST 2014 - ev.h wasn't valid C++ anymore, which tripped compilers other than clang, msvc or gcc (analyzed by Raphael 'kena' Poss). Unfortunately, C++ doesn't support typedefs for function pointers fully, so the affected declarations have to spell out the types each time. - when not using autoconf, tighten the check for clock_gettime and related functionality. 4.18 Fri Sep 5 17:55:26 CEST 2014 - events on files were not always generated properly with the epoll backend (testcase by Assaf Inbal). - mark event pipe fd as cloexec after a fork (analyzed by Sami Farin). - (ecb) support m68k, m88k and sh (patch by Miod Vallat). - use a reasonable fallback for EV_NSIG instead of erroring out when we can't detect the signal set size. - in the absence of autoconf, do not use the clock syscall on glibc >= 2.17 (avoids the syscall AND -lrt on systems doing clock_gettime in userspace). - ensure extern "C" function pointers are used for externally-visible loop callbacks (not watcher callbacks yet). - (ecb) work around memory barriers and volatile apparently both being broken in visual studio 2008 and later (analysed and patch by Nicolas Noble). 4.15 Fri Mar 1 12:04:50 CET 2013 - destroying a non-default loop would stop the global waitpid watcher (Denis Bilenko). - queueing pending watchers of higher priority from a watcher now invokes them in a timely fashion (reported by Denis Bilenko). - add throw() to all libev functions that cannot throw exceptions, for further code size decrease when compiling for C++. - add throw () to callbacks that must not throw exceptions (allocator, syserr, loop acquire/release, periodic reschedule cbs). - fix event_base_loop return code, add event_get_callback, event_base_new, event_base_get_method calls to improve libevent 1.x emulation and add some libevent 2.x functionality (based on a patch by Jeff Davey). - add more memory fences to fix a bug reported by Jeff Davey. Better be overfenced than underprotected. - ev_run now returns a boolean status (true meaning watchers are still active). - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with libev's EV_ERROR (reported by 191919). - (ecb) add memory fence support for xlC (Darin McBride). - (ecb) add memory fence support for gcc-mips (Anton Kirilov). - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber). - work around some kernels losing file descriptors by leaking the kqueue descriptor in the child. - work around linux inotify not reporting IN_ATTRIB changes for directories in many cases. - include sys/syscall.h instead of plain syscall.h. - check for io watcher loops in ev_verify, check for the most common reported usage bug in ev_io_start. - choose socket vs. WSASocket at compiletime using EV_USE_WSASOCKET. - always use WSASend/WSARecv directly on windows, hoping that this works in all cases (unlike read/write/send/recv...). - try to detect signals around a fork faster (test program by Denis Bilenko). - work around recent glibc versions that leak memory in realloc. - rename ev::embed::set to ev::embed::set_embed to avoid clashing the watcher base set (loop) method. - rewrite the async/signal pipe logic to always keep a valid fd, which simplifies (and hopefully correctifies :) the race checking on fork, at the cost of one extra fd. - add fat, msdos, jffs2, ramfs, ntfs and btrfs to the list of inotify-supporting filesystems. - move orig_CFLAGS assignment to after AC_INIT, as newer autoconf versions ignore it before (https://bugzilla.redhat.com/show_bug.cgi?id=908096). - add some untested android support. - enum expressions must be of type int (reported by Juan Pablo L). 4.11 Sat Feb 4 19:52:39 CET 2012 - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as was documented already, but not implemented in the repeating case. - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS. - fix a race where the workaround against the epoll fork bugs caused signals to not be handled anymore. - correct backend_fudge for most backends, and implement a windows specific workaround to avoid looping because we call both select and Sleep, both with different time resolutions. - document range and guarantees of ev_sleep. - document reasonable ranges for periodics interval and offset. - rename backend_fudge to backend_mintime to avoid future confusion :) - change the default periodic reschedule function to hopefully be more exact and correct even in corner cases or in the far future. - do not rely on -lm anymore: use it when available but use our own floor () if it is missing. This should make it easier to embed, as no external libraries are required. - strategically import macros from libecb and mark rarely-used functions as cache-cold (saving almost 2k code size on typical amd64 setups). - add Symbols.ev and Symbols.event files, that were missing. - fix backend_mintime value for epoll (was 1/1024, is 1/1000 now). - fix #3 "be smart about timeouts" to not "deadlock" when timeout == now, also improve the section overall. - avoid "AVOIDING FINISHING BEFORE RETURNING" idiom. - support new EV_API_STATIC mode to make all libev symbols static. - supply default CFLAGS of -g -O3 with gcc when original CFLAGS were empty. 4.04 Wed Feb 16 09:01:51 CET 2011 - fix two problems in the native win32 backend, where reuse of fd's with different underlying handles caused handles not to be removed or added to the select set (analyzed and tested by Bert Belder). - do no rely on ceil() in ev_e?poll.c. - backport libev to HP-UX versions before 11 v3. - configure did not detect nanosleep and clock_gettime properly when they are available in the libc (as opposed to -lrt). 4.03 Tue Jan 11 14:37:25 CET 2011 - officially support polling files with all backends. - support files, /dev/zero etc. the same way as select in the epoll backend, by generating events on our own. - ports backend: work around solaris bug 6874410 and many related ones (EINTR, maybe more), with no performance loss (note that the solaris bug report is actually wrong, reality is far more bizarre and broken than that). - define EV_READ/EV_WRITE as macros in event.h, as some programs use #ifdef to test for them. - new (experimental) function: ev_feed_signal. - new (to become default) EVFLAG_NOSIGMASK flag. - new EVBACKEND_MASK symbol. - updated COMMON IDIOMS SECTION. 4.01 Fri Nov 5 21:51:29 CET 2010 - automake fucked it up, apparently, --add-missing -f is not quite enough to make it update its files, so 4.00 didn't install ev++.h and event.h on make install. grrr. - ev_loop(count|depth) didn't return anything (Robin Haberkorn). - change EV_UNDEF to 0xffffffff to silence some overzealous compilers. - use "(libev) " prefix for all libev error messages now. 4.00 Mon Oct 25 12:32:12 CEST 2010 - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading. - ev_embed_stop did not correctly stop the watcher (very good testcase by Vladimir Timofeev). - ev_run will now always update the current loop time - it erroneously didn't when idle watchers were active, causing timers not to fire. - fix a bug where a timeout of zero caused the timer not to fire in the libevent emulation (testcase by Péter Szabó). - applied win32 fixes by Michael Lenaghan (also James Mansion). - replace EV_MINIMAL by EV_FEATURES. - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it seems the former is *much* faster than the latter. - linux kernel version detection (for inotify bug workarounds) did not work properly. - reduce the number of spurious wake-ups with the ports backend. - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu). - do async init within ev_async_start, not ev_async_set, which avoids an API quirk where the set function must be called in the C++ API even when there is nothing to set. - add (undocumented) EV_ENABLE when adding events with kqueue, this might help with OS X, which seems to need it despite documenting not to need it (helpfully pointed out by Tilghman Lesher). - do not use poll by default on freebsd, it's broken (what isn't on freebsd...). - allow to embed epoll on kernels >= 2.6.32. - configure now prepends -O3, not appends it, so one can still override it. - ev.pod: greatly expanded the portability section, added a porting section, a description of watcher states and made lots of minor fixes. - disable poll backend on AIX, the poll header spams the namespace and it's not worth working around dead platforms (reported and analyzed by Aivars Kalvans). - improve header file compatibility of the standalone eventfd code in an obscure case. - implement EV_AVOID_STDIO option. - do not use sscanf to parse linux version number (smaller, faster, no sscanf dependency). - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings. - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs. - add section on accept() problems to the manpage. - rename EV_TIMEOUT to EV_TIMER. - rename ev_loop_count/depth/verify/loop/unloop. - remove ev_default_destroy and ev_default_fork. - switch to two-digit minor version. - work around an apparent gentoo compiler bug. - define _DARWIN_UNLIMITED_SELECT. just so. - use enum instead of #define for most constants. - improve compatibility to older C++ compilers. - (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now default arguments when compiled as C++. - enable automake dependency tracking. - ev_loop_new no longer leaks memory when loop creation failed. - new ev_cleanup watcher type. 3.9 Thu Dec 31 07:59:59 CET 2009 - signalfd is no longer used by default and has to be requested explicitly - this means that easy to catch bugs become hard to catch race conditions, but the users have spoken. - point out the unspecified signal mask in the documentation, and that this is a race condition regardless of EV_SIGNALFD. - backport inotify code to C89. - inotify file descriptors could leak into child processes. - ev_stat watchers could keep an erroneous extra ref on the loop, preventing exit when unregistering all watchers (testcases provided by ry@tinyclouds.org). - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration symbols to make it easier for apps to do their own fd management. - support EV_IDLE_ENABLE being disabled in ev++.h (patch by Didier Spezia). - take advantage of inotify_init1, if available, to set cloexec/nonblock on fd creation, to avoid races. - the signal handling pipe wasn't always initialised under windows (analysed by lekma). - changed minimum glibc requirement from glibc 2.9 to 2.7, for signalfd. - add missing string.h include (Denis F. Latypoff). - only replace ev_stat.prev when we detect an actual difference, so prev is (almost) always different to attr. this might have caused the problems with 04_stat.t. - add ev::timer->remaining () method to C++ API. 3.8 Sun Aug 9 14:30:45 CEST 2009 - incompatible change: do not necessarily reset signal handler to SIG_DFL when a sighandler is stopped. - ev_default_destroy did not properly free or zero some members, potentially causing crashes and memory corruption on repeated ev_default_destroy/ev_default_loop calls. - take advantage of signalfd on GNU/Linux systems. - document that the signal mask might be in an unspecified state when using libev's signal handling. - take advantage of some GNU/Linux calls to set cloexec/nonblock on fd creation, to avoid race conditions. 3.7 Fri Jul 17 16:36:32 CEST 2009 - ev_unloop and ev_loop wrongly used a global variable to exit loops, instead of using a per-loop variable (bug caught by accident...). - the ev_set_io_collect_interval interpretation has changed. - add new functionality: ev_set_userdata, ev_userdata, ev_set_invoke_pending_cb, ev_set_loop_release_cb, ev_invoke_pending, ev_pending_count, together with a long example about thread locking. - add ev_timer_remaining (as requested by Denis F. Latypoff). - add ev_loop_depth. - calling ev_unloop in fork/prepare watchers will no longer poll for new events. - Denis F. Latypoff corrected many typos in example code snippets. - honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double- check that the syscall number is available before trying to use it (reported by ry@tinyclouds). - use GetSystemTimeAsFileTime instead of _timeb on windows, for slightly higher accuracy. - properly declare ev_loop_verify and ev_now_update even when !EV_MULTIPLICITY. - do not compile in any priority code when EV_MAXPRI == EV_MINPRI. - support EV_MINIMAL==2 for a reduced API. - actually 0-initialise struct sigaction when installing signals. - add section on hibernate and stopped processes to ev_timer docs. 3.6 Tue Apr 28 02:49:30 CEST 2009 - multiple timers becoming ready within an event loop iteration will be invoked in the "correct" order now. - do not leave the event loop early just because we have no active watchers, fixing a problem when embedding a kqueue loop that has active kernel events but no registered watchers (reported by blacksand blacksand). - correctly zero the idx values for arrays, so destroying and reinitialising the default loop actually works (patch by Malek Hadj-Ali). - implement ev_suspend and ev_resume. - new EV_CUSTOM revents flag for use by applications. - add documentation section about priorities. - add a glossary to the documentation. - extend the ev_fork description slightly. - optimize a jump out of call_pending. 3.53 Sun Feb 15 02:38:20 CET 2009 - fix a bug in event pipe creation on win32 that would cause a failed assertion on event loop creation (patch by Malek Hadj-Ali). - probe for CLOCK_REALTIME support at runtime as well and fall back to gettimeofday if there is an error, to support older operating systems with newer header files/libraries. - prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL (default most everywhere), otherwise not. 3.52 Wed Jan 7 21:43:02 CET 2009 - fix compilation of select backend in fd_set mode when NFDBITS is missing (to get it to compile on QNX, reported by Rodrigo Campos). - better select-nfds handling when select backend is in fd_set mode. - diagnose fd_set overruns when select backend is in fd_set mode. - due to a thinko, instead of disabling everything but select on the borked OS X platform, everything but select was allowed (reported by Emanuele Giaquinta). - actually verify that local and remote port are matching in libev's socketpair emulation, which makes denial-of-service attacks harder (but not impossible - it's windows). Make sure it even works under vista, which thinks that getpeer/sockname should return fantasy port numbers. - include "libev" in all assertion messages for potentially clearer diagnostics. - event_get_version (libevent compatibility) returned a useless string instead of the expected version string (patch by W.C.A. Wijngaards). 3.51 Wed Dec 24 23:00:11 CET 2008 - fix a bug where an inotify watcher was added twice, causing freezes on hash collisions (reported and analysed by Graham Leggett). - new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use a direct syscall - slower, but no dependency on librt et al. - assume negative return values != -1 signals success of port_getn (http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52) (no known failure reports, but it doesn't hurt). - fork detection in ev_embed now stops and restarts the watcher automatically. - EXPERIMENTAL: default the method to operator () in ev++.h, to make it nicer to use functors (requested by Benedek László). - fixed const object callbacks in ev++.h. - replaced loop_ref argument of watcher.set (loop) by a direct ev_loop * in ev++.h, to avoid clashes with functor patch. - do not try to watch the empty string via inotify. - inotify watchers could be leaked under certain circumstances. - OS X 10.5 is actually even more broken than earlier versions, so fall back to select on that piece of garbage. - fixed some weirdness in the ev_embed documentation. 3.49 Wed Nov 19 11:26:53 CET 2008 - ev_stat watchers will now use inotify as a mere hint on kernels <2.6.25, or if the filesystem is not in the "known to be good" list. - better mingw32 compatibility (it's not as borked as native win32) (analysed by Roger Pack). - include stdio.h in the example program, as too many people are confused by the weird C language otherwise. I guess the next thing I get told is that the "..." ellipses in the examples don't compile with their C compiler. 3.48 Thu Oct 30 09:02:37 CET 2008 - further optimise away the EPOLL_CTL_ADD/MOD combo in the epoll backend by assuming the kernel event mask hasn't changed if ADD fails with EEXIST. - work around spurious event notification bugs in epoll by using a 32-bit generation counter. recreate kernel state if we receive spurious notifications or unwanted events. this is very costly, but I didn't come up with this horrible design. - use memset to initialise most arrays now and do away with the init functions. - expand time-out strategies into a "Be smart about timeouts" section. - drop the "struct" from all ev_watcher declarations in the documentation and did other clarifications (yeah, it was a mistake to have a struct AND a function called ev_loop). - fix a bug where ev_default would not initialise the default loop again after it was destroyed with ev_default_destroy. - rename syserr to ev_syserr to avoid name clashes when embedding, do similar changes for event.c. 3.45 Tue Oct 21 21:59:26 CEST 2008 - disable inotify usage on linux <2.6.25, as it is broken (reported by Yoann Vandoorselaere). - ev_stat erroneously would try to add inotify watchers even when inotify wasn't available (this should only have a performance impact). - ev_once now passes both timeout and io to the callback if both occur concurrently, instead of giving timeouts precedence. - disable EV_USE_INOTIFY when sys/inotify.h is too old. 3.44 Mon Sep 29 05:18:39 CEST 2008 - embed watchers now automatically invoke ev_loop_fork on the embedded loop when the parent loop forks. - new function: ev_now_update (loop). - verify_watcher was not marked static. - improve the "associating..." manpage section. - documentation tweaks here and there. 3.43 Sun Jul 6 05:34:41 CEST 2008 - include more include files on windows to get struct _stati64 (reported by Chris Hulbert, but doesn't quite fix his issue). - add missing #include in ev.c on windows (reported by Matt Tolton). 3.42 Tue Jun 17 12:12:07 CEST 2008 - work around yet another windows bug: FD_SET actually adds fd's multiple times to the fd_*SET*, despite official MSN docs claiming otherwise. Reported and well-analysed by Matt Tolton. - define NFDBITS to 0 when EV_SELECT_IS_WINSOCKET to make it compile (reported any analysed by Chris Hulbert). - fix a bug in ev_ebadf (this function is only used to catch programming errors in the libev user). reported by Matt Tolton. - fix a bug in fd_intern on win32 (could lead to compile errors under some circumstances, but would work correctly if it compiles). reported by Matt Tolton. - (try to) work around missing lstat on windows. - pass in the write fd set as except fd set under windows. windows is so uncontrollably lame that it requires this. this means that switching off oobinline is not supported (but tcp/ip doesn't have oob, so that would be stupid anyways. - use posix module symbol to auto-detect monotonic clock presence and some other default values. 3.41 Fri May 23 18:42:54 CEST 2008 - work around an obscure bug in winsocket select: if you provide only empty fd sets then select returns WSAEINVAL. how sucky. - improve timer scheduling stability and reduce use of time_epsilon. - use 1-based 2-heap for EV_MINIMAL, simplifies code, reduces codesize and makes for better cache-efficiency. - use 3-based 4-heap for !EV_MINIMAL. this makes better use of cpu cache lines and gives better growth behaviour than 2-based heaps. - cache timestamp within heap for !EV_MINIMAL, to avoid random memory accesses. - document/add EV_USE_4HEAP and EV_HEAP_CACHE_AT. - fix a potential aliasing issue in ev_timer_again. - add/document ev_periodic_at, retract direct access to ->at. - improve ev_stat docs. - add portability requirements section. - fix manpage headers etc. - normalise WSA error codes to lower range on windows. - add consistency check code that can be called automatically or on demand to check for internal structures (ev_loop_verify). 3.31 Wed Apr 16 20:45:04 CEST 2008 - added last minute fix for ev_poll.c by Brandon Black. 3.3 Wed Apr 16 19:04:10 CEST 2008 - event_base_loopexit should return 0 on success (W.C.A. Wijngaards). - added linux eventfd support. - try to autodetect epoll and inotify support by libc header version if not using autoconf. - new symbols: EV_DEFAULT_UC and EV_DEFAULT_UC_. - declare functions defined in ev.h as inline if C99 or gcc are available. - enable inlining with gcc versions 2 and 3. - work around broken poll implementations potentially not clearing revents field in ev_poll (Brandon Black) (no such systems are known at this time). - work around a bug in realloc on openbsd and darwin, also makes the erroneous valgrind complaints go away (noted by various people). - fix ev_async_pending, add c++ wrapper for ev_async (based on patch sent by Johannes Deisenhofer). - add sensible set method to ev::embed. - made integer constants type int in ev.h. 3.2 Wed Apr 2 17:11:19 CEST 2008 - fix a 64 bit overflow issue in the select backend, by using fd_mask instead of int for the mask. - rename internal sighandler to avoid clash with very old perls. - entering ev_loop will not clear the ONESHOT or NONBLOCKING flags of any outer loops anymore. - add ev_async_pending. 3.1 Thu Mar 13 13:45:22 CET 2008 - implement ev_async watchers. - only initialise signal pipe on demand. - make use of sig_atomic_t configurable. - improved documentation. 3.0 Mon Jan 28 13:14:47 CET 2008 - API/ABI bump to version 3.0. - ev++.h includes "ev.h" by default now, not . - slightly improved documentation. - speed up signal detection after a fork. - only optionally return trace status changed in ev_child watchers. - experimental (and undocumented) loop wrappers for ev++.h. 2.01 Tue Dec 25 08:04:41 CET 2007 - separate Changes file. - fix ev_path_set => ev_stat_set typo. - remove event_compat.h from the libev tarball. - change how include files are found. - doc updates. - update licenses, explicitly allow for GPL relicensing. 2.0 Sat Dec 22 17:47:03 CET 2007 - new ev_sleep, ev_set_(io|timeout)_collect_interval. - removed epoll from embeddable fd set. - fix embed watchers. - renamed ev_embed.loop to other. - added exported Symbol tables. - undefine member wrapper macros at the end of ev.c. - respect EV_H in ev++.h. 1.86 Tue Dec 18 02:36:57 CET 2007 - fix memleak on loop destroy (not relevant for perl). 1.85 Fri Dec 14 20:32:40 CET 2007 - fix some aliasing issues w.r.t. timers and periodics (not relevant for perl). (for historic versions refer to EV/Changes, found in the Perl interface) 0.1 Wed Oct 31 21:31:48 CET 2007 - original version; hacked together in <24h. libev-4.33/autogen.sh0000644000000000000000000000006212337443634011440 00000000000000#!/bin/sh autoreconf --install --symlink --force libev-4.33/ev_vars.h0000644000000000000000000001657513601423253011266 00000000000000/* * loop member variable declarations * * Copyright (c) 2007,2008,2009,2010,2011,2012,2013,2019 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #define VARx(type,name) VAR(name, type name) VARx(ev_tstamp, now_floor) /* last time we refreshed rt_time */ VARx(ev_tstamp, mn_now) /* monotonic clock "now" */ VARx(ev_tstamp, rtmn_diff) /* difference realtime - monotonic time */ /* for reverse feeding of events */ VARx(W *, rfeeds) VARx(int, rfeedmax) VARx(int, rfeedcnt) VAR (pendings, ANPENDING *pendings [NUMPRI]) VAR (pendingmax, int pendingmax [NUMPRI]) VAR (pendingcnt, int pendingcnt [NUMPRI]) VARx(int, pendingpri) /* highest priority currently pending */ VARx(ev_prepare, pending_w) /* dummy pending watcher */ VARx(ev_tstamp, io_blocktime) VARx(ev_tstamp, timeout_blocktime) VARx(int, backend) VARx(int, activecnt) /* total number of active events ("refcount") */ VARx(EV_ATOMIC_T, loop_done) /* signal by ev_break */ VARx(int, backend_fd) VARx(ev_tstamp, backend_mintime) /* assumed typical timer resolution */ VAR (backend_modify, void (*backend_modify)(EV_P_ int fd, int oev, int nev)) VAR (backend_poll , void (*backend_poll)(EV_P_ ev_tstamp timeout)) VARx(ANFD *, anfds) VARx(int, anfdmax) VAR (evpipe, int evpipe [2]) VARx(ev_io, pipe_w) VARx(EV_ATOMIC_T, pipe_write_wanted) VARx(EV_ATOMIC_T, pipe_write_skipped) #if !defined(_WIN32) || EV_GENWRAP VARx(pid_t, curpid) #endif VARx(char, postfork) /* true if we need to recreate kernel state after fork */ #if EV_USE_SELECT || EV_GENWRAP VARx(void *, vec_ri) VARx(void *, vec_ro) VARx(void *, vec_wi) VARx(void *, vec_wo) #if defined(_WIN32) || EV_GENWRAP VARx(void *, vec_eo) #endif VARx(int, vec_max) #endif #if EV_USE_POLL || EV_GENWRAP VARx(struct pollfd *, polls) VARx(int, pollmax) VARx(int, pollcnt) VARx(int *, pollidxs) /* maps fds into structure indices */ VARx(int, pollidxmax) #endif #if EV_USE_EPOLL || EV_GENWRAP VARx(struct epoll_event *, epoll_events) VARx(int, epoll_eventmax) VARx(int *, epoll_eperms) VARx(int, epoll_epermcnt) VARx(int, epoll_epermmax) #endif #if EV_USE_LINUXAIO || EV_GENWRAP VARx(aio_context_t, linuxaio_ctx) VARx(int, linuxaio_iteration) VARx(struct aniocb **, linuxaio_iocbps) VARx(int, linuxaio_iocbpmax) VARx(struct iocb **, linuxaio_submits) VARx(int, linuxaio_submitcnt) VARx(int, linuxaio_submitmax) VARx(ev_io, linuxaio_epoll_w) #endif #if EV_USE_IOURING || EV_GENWRAP VARx(int, iouring_fd) VARx(unsigned, iouring_to_submit); VARx(int, iouring_entries) VARx(int, iouring_max_entries) VARx(void *, iouring_sq_ring) VARx(void *, iouring_cq_ring) VARx(void *, iouring_sqes) VARx(uint32_t, iouring_sq_ring_size) VARx(uint32_t, iouring_cq_ring_size) VARx(uint32_t, iouring_sqes_size) VARx(uint32_t, iouring_sq_head) VARx(uint32_t, iouring_sq_tail) VARx(uint32_t, iouring_sq_ring_mask) VARx(uint32_t, iouring_sq_ring_entries) VARx(uint32_t, iouring_sq_flags) VARx(uint32_t, iouring_sq_dropped) VARx(uint32_t, iouring_sq_array) VARx(uint32_t, iouring_cq_head) VARx(uint32_t, iouring_cq_tail) VARx(uint32_t, iouring_cq_ring_mask) VARx(uint32_t, iouring_cq_ring_entries) VARx(uint32_t, iouring_cq_overflow) VARx(uint32_t, iouring_cq_cqes) VARx(ev_tstamp, iouring_tfd_to) VARx(int, iouring_tfd) VARx(ev_io, iouring_tfd_w) #endif #if EV_USE_KQUEUE || EV_GENWRAP VARx(pid_t, kqueue_fd_pid) VARx(struct kevent *, kqueue_changes) VARx(int, kqueue_changemax) VARx(int, kqueue_changecnt) VARx(struct kevent *, kqueue_events) VARx(int, kqueue_eventmax) #endif #if EV_USE_PORT || EV_GENWRAP VARx(struct port_event *, port_events) VARx(int, port_eventmax) #endif #if EV_USE_IOCP || EV_GENWRAP VARx(HANDLE, iocp) #endif VARx(int *, fdchanges) VARx(int, fdchangemax) VARx(int, fdchangecnt) VARx(ANHE *, timers) VARx(int, timermax) VARx(int, timercnt) #if EV_PERIODIC_ENABLE || EV_GENWRAP VARx(ANHE *, periodics) VARx(int, periodicmax) VARx(int, periodiccnt) #endif #if EV_IDLE_ENABLE || EV_GENWRAP VAR (idles, ev_idle **idles [NUMPRI]) VAR (idlemax, int idlemax [NUMPRI]) VAR (idlecnt, int idlecnt [NUMPRI]) #endif VARx(int, idleall) /* total number */ VARx(struct ev_prepare **, prepares) VARx(int, preparemax) VARx(int, preparecnt) VARx(struct ev_check **, checks) VARx(int, checkmax) VARx(int, checkcnt) #if EV_FORK_ENABLE || EV_GENWRAP VARx(struct ev_fork **, forks) VARx(int, forkmax) VARx(int, forkcnt) #endif #if EV_CLEANUP_ENABLE || EV_GENWRAP VARx(struct ev_cleanup **, cleanups) VARx(int, cleanupmax) VARx(int, cleanupcnt) #endif #if EV_ASYNC_ENABLE || EV_GENWRAP VARx(EV_ATOMIC_T, async_pending) VARx(struct ev_async **, asyncs) VARx(int, asyncmax) VARx(int, asynccnt) #endif #if EV_USE_INOTIFY || EV_GENWRAP VARx(int, fs_fd) VARx(ev_io, fs_w) VARx(char, fs_2625) /* whether we are running in linux 2.6.25 or newer */ VAR (fs_hash, ANFS fs_hash [EV_INOTIFY_HASHSIZE]) #endif VARx(EV_ATOMIC_T, sig_pending) #if EV_USE_SIGNALFD || EV_GENWRAP VARx(int, sigfd) VARx(ev_io, sigfd_w) VARx(sigset_t, sigfd_set) #endif #if EV_USE_TIMERFD || EV_GENWRAP VARx(int, timerfd) /* timerfd for time jump detection */ VARx(ev_io, timerfd_w) #endif VARx(unsigned int, origflags) /* original loop flags */ #if EV_FEATURE_API || EV_GENWRAP VARx(unsigned int, loop_count) /* total number of loop iterations/blocks */ VARx(unsigned int, loop_depth) /* #ev_run enters - #ev_run leaves */ VARx(void *, userdata) /* C++ doesn't support the ev_loop_callback typedef here. stinks. */ VAR (release_cb, void (*release_cb)(EV_P) EV_NOEXCEPT) VAR (acquire_cb, void (*acquire_cb)(EV_P) EV_NOEXCEPT) VAR (invoke_cb , ev_loop_callback invoke_cb) #endif #undef VARx libev-4.33/ev_wrap.h0000644000000000000000000002006013634411664011255 00000000000000/* DO NOT EDIT, automatically generated by update_ev_wrap */ #ifndef EV_WRAP_H #define EV_WRAP_H #define acquire_cb ((loop)->acquire_cb) #define activecnt ((loop)->activecnt) #define anfdmax ((loop)->anfdmax) #define anfds ((loop)->anfds) #define async_pending ((loop)->async_pending) #define asynccnt ((loop)->asynccnt) #define asyncmax ((loop)->asyncmax) #define asyncs ((loop)->asyncs) #define backend ((loop)->backend) #define backend_fd ((loop)->backend_fd) #define backend_mintime ((loop)->backend_mintime) #define backend_modify ((loop)->backend_modify) #define backend_poll ((loop)->backend_poll) #define checkcnt ((loop)->checkcnt) #define checkmax ((loop)->checkmax) #define checks ((loop)->checks) #define cleanupcnt ((loop)->cleanupcnt) #define cleanupmax ((loop)->cleanupmax) #define cleanups ((loop)->cleanups) #define curpid ((loop)->curpid) #define epoll_epermcnt ((loop)->epoll_epermcnt) #define epoll_epermmax ((loop)->epoll_epermmax) #define epoll_eperms ((loop)->epoll_eperms) #define epoll_eventmax ((loop)->epoll_eventmax) #define epoll_events ((loop)->epoll_events) #define evpipe ((loop)->evpipe) #define fdchangecnt ((loop)->fdchangecnt) #define fdchangemax ((loop)->fdchangemax) #define fdchanges ((loop)->fdchanges) #define forkcnt ((loop)->forkcnt) #define forkmax ((loop)->forkmax) #define forks ((loop)->forks) #define fs_2625 ((loop)->fs_2625) #define fs_fd ((loop)->fs_fd) #define fs_hash ((loop)->fs_hash) #define fs_w ((loop)->fs_w) #define idleall ((loop)->idleall) #define idlecnt ((loop)->idlecnt) #define idlemax ((loop)->idlemax) #define idles ((loop)->idles) #define invoke_cb ((loop)->invoke_cb) #define io_blocktime ((loop)->io_blocktime) #define iocp ((loop)->iocp) #define iouring_cq_cqes ((loop)->iouring_cq_cqes) #define iouring_cq_head ((loop)->iouring_cq_head) #define iouring_cq_overflow ((loop)->iouring_cq_overflow) #define iouring_cq_ring ((loop)->iouring_cq_ring) #define iouring_cq_ring_entries ((loop)->iouring_cq_ring_entries) #define iouring_cq_ring_mask ((loop)->iouring_cq_ring_mask) #define iouring_cq_ring_size ((loop)->iouring_cq_ring_size) #define iouring_cq_tail ((loop)->iouring_cq_tail) #define iouring_entries ((loop)->iouring_entries) #define iouring_fd ((loop)->iouring_fd) #define iouring_max_entries ((loop)->iouring_max_entries) #define iouring_sq_array ((loop)->iouring_sq_array) #define iouring_sq_dropped ((loop)->iouring_sq_dropped) #define iouring_sq_flags ((loop)->iouring_sq_flags) #define iouring_sq_head ((loop)->iouring_sq_head) #define iouring_sq_ring ((loop)->iouring_sq_ring) #define iouring_sq_ring_entries ((loop)->iouring_sq_ring_entries) #define iouring_sq_ring_mask ((loop)->iouring_sq_ring_mask) #define iouring_sq_ring_size ((loop)->iouring_sq_ring_size) #define iouring_sq_tail ((loop)->iouring_sq_tail) #define iouring_sqes ((loop)->iouring_sqes) #define iouring_sqes_size ((loop)->iouring_sqes_size) #define iouring_tfd ((loop)->iouring_tfd) #define iouring_tfd_to ((loop)->iouring_tfd_to) #define iouring_tfd_w ((loop)->iouring_tfd_w) #define iouring_to_submit ((loop)->iouring_to_submit) #define kqueue_changecnt ((loop)->kqueue_changecnt) #define kqueue_changemax ((loop)->kqueue_changemax) #define kqueue_changes ((loop)->kqueue_changes) #define kqueue_eventmax ((loop)->kqueue_eventmax) #define kqueue_events ((loop)->kqueue_events) #define kqueue_fd_pid ((loop)->kqueue_fd_pid) #define linuxaio_ctx ((loop)->linuxaio_ctx) #define linuxaio_epoll_w ((loop)->linuxaio_epoll_w) #define linuxaio_iocbpmax ((loop)->linuxaio_iocbpmax) #define linuxaio_iocbps ((loop)->linuxaio_iocbps) #define linuxaio_iteration ((loop)->linuxaio_iteration) #define linuxaio_submitcnt ((loop)->linuxaio_submitcnt) #define linuxaio_submitmax ((loop)->linuxaio_submitmax) #define linuxaio_submits ((loop)->linuxaio_submits) #define loop_count ((loop)->loop_count) #define loop_depth ((loop)->loop_depth) #define loop_done ((loop)->loop_done) #define mn_now ((loop)->mn_now) #define now_floor ((loop)->now_floor) #define origflags ((loop)->origflags) #define pending_w ((loop)->pending_w) #define pendingcnt ((loop)->pendingcnt) #define pendingmax ((loop)->pendingmax) #define pendingpri ((loop)->pendingpri) #define pendings ((loop)->pendings) #define periodiccnt ((loop)->periodiccnt) #define periodicmax ((loop)->periodicmax) #define periodics ((loop)->periodics) #define pipe_w ((loop)->pipe_w) #define pipe_write_skipped ((loop)->pipe_write_skipped) #define pipe_write_wanted ((loop)->pipe_write_wanted) #define pollcnt ((loop)->pollcnt) #define pollidxmax ((loop)->pollidxmax) #define pollidxs ((loop)->pollidxs) #define pollmax ((loop)->pollmax) #define polls ((loop)->polls) #define port_eventmax ((loop)->port_eventmax) #define port_events ((loop)->port_events) #define postfork ((loop)->postfork) #define preparecnt ((loop)->preparecnt) #define preparemax ((loop)->preparemax) #define prepares ((loop)->prepares) #define release_cb ((loop)->release_cb) #define rfeedcnt ((loop)->rfeedcnt) #define rfeedmax ((loop)->rfeedmax) #define rfeeds ((loop)->rfeeds) #define rtmn_diff ((loop)->rtmn_diff) #define sig_pending ((loop)->sig_pending) #define sigfd ((loop)->sigfd) #define sigfd_set ((loop)->sigfd_set) #define sigfd_w ((loop)->sigfd_w) #define timeout_blocktime ((loop)->timeout_blocktime) #define timercnt ((loop)->timercnt) #define timerfd ((loop)->timerfd) #define timerfd_w ((loop)->timerfd_w) #define timermax ((loop)->timermax) #define timers ((loop)->timers) #define userdata ((loop)->userdata) #define vec_eo ((loop)->vec_eo) #define vec_max ((loop)->vec_max) #define vec_ri ((loop)->vec_ri) #define vec_ro ((loop)->vec_ro) #define vec_wi ((loop)->vec_wi) #define vec_wo ((loop)->vec_wo) #else #undef EV_WRAP_H #undef acquire_cb #undef activecnt #undef anfdmax #undef anfds #undef async_pending #undef asynccnt #undef asyncmax #undef asyncs #undef backend #undef backend_fd #undef backend_mintime #undef backend_modify #undef backend_poll #undef checkcnt #undef checkmax #undef checks #undef cleanupcnt #undef cleanupmax #undef cleanups #undef curpid #undef epoll_epermcnt #undef epoll_epermmax #undef epoll_eperms #undef epoll_eventmax #undef epoll_events #undef evpipe #undef fdchangecnt #undef fdchangemax #undef fdchanges #undef forkcnt #undef forkmax #undef forks #undef fs_2625 #undef fs_fd #undef fs_hash #undef fs_w #undef idleall #undef idlecnt #undef idlemax #undef idles #undef invoke_cb #undef io_blocktime #undef iocp #undef iouring_cq_cqes #undef iouring_cq_head #undef iouring_cq_overflow #undef iouring_cq_ring #undef iouring_cq_ring_entries #undef iouring_cq_ring_mask #undef iouring_cq_ring_size #undef iouring_cq_tail #undef iouring_entries #undef iouring_fd #undef iouring_max_entries #undef iouring_sq_array #undef iouring_sq_dropped #undef iouring_sq_flags #undef iouring_sq_head #undef iouring_sq_ring #undef iouring_sq_ring_entries #undef iouring_sq_ring_mask #undef iouring_sq_ring_size #undef iouring_sq_tail #undef iouring_sqes #undef iouring_sqes_size #undef iouring_tfd #undef iouring_tfd_to #undef iouring_tfd_w #undef iouring_to_submit #undef kqueue_changecnt #undef kqueue_changemax #undef kqueue_changes #undef kqueue_eventmax #undef kqueue_events #undef kqueue_fd_pid #undef linuxaio_ctx #undef linuxaio_epoll_w #undef linuxaio_iocbpmax #undef linuxaio_iocbps #undef linuxaio_iteration #undef linuxaio_submitcnt #undef linuxaio_submitmax #undef linuxaio_submits #undef loop_count #undef loop_depth #undef loop_done #undef mn_now #undef now_floor #undef origflags #undef pending_w #undef pendingcnt #undef pendingmax #undef pendingpri #undef pendings #undef periodiccnt #undef periodicmax #undef periodics #undef pipe_w #undef pipe_write_skipped #undef pipe_write_wanted #undef pollcnt #undef pollidxmax #undef pollidxs #undef pollmax #undef polls #undef port_eventmax #undef port_events #undef postfork #undef preparecnt #undef preparemax #undef prepares #undef release_cb #undef rfeedcnt #undef rfeedmax #undef rfeeds #undef rtmn_diff #undef sig_pending #undef sigfd #undef sigfd_set #undef sigfd_w #undef timeout_blocktime #undef timercnt #undef timerfd #undef timerfd_w #undef timermax #undef timers #undef userdata #undef vec_eo #undef vec_max #undef vec_ri #undef vec_ro #undef vec_wi #undef vec_wo #endif libev-4.33/ev_epoll.c0000644000000000000000000002417513556456317011434 00000000000000/* * libev epoll fd activity backend * * Copyright (c) 2007,2008,2009,2010,2011,2016,2017,2019 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ /* * general notes about epoll: * * a) epoll silently removes fds from the fd set. as nothing tells us * that an fd has been removed otherwise, we have to continually * "rearm" fds that we suspect *might* have changed (same * problem with kqueue, but much less costly there). * b) the fact that ADD != MOD creates a lot of extra syscalls due to a) * and seems not to have any advantage. * c) the inability to handle fork or file descriptors (think dup) * limits the applicability over poll, so this is not a generic * poll replacement. * d) epoll doesn't work the same as select with many file descriptors * (such as files). while not critical, no other advanced interface * seems to share this (rather non-unixy) limitation. * e) epoll claims to be embeddable, but in practise you never get * a ready event for the epoll fd (broken: <=2.6.26, working: >=2.6.32). * f) epoll_ctl returning EPERM means the fd is always ready. * * lots of "weird code" and complication handling in this file is due * to these design problems with epoll, as we try very hard to avoid * epoll_ctl syscalls for common usage patterns and handle the breakage * ensuing from receiving events for closed and otherwise long gone * file descriptors. */ #include #define EV_EMASK_EPERM 0x80 static void epoll_modify (EV_P_ int fd, int oev, int nev) { struct epoll_event ev; unsigned char oldmask; /* * we handle EPOLL_CTL_DEL by ignoring it here * on the assumption that the fd is gone anyways * if that is wrong, we have to handle the spurious * event in epoll_poll. * if the fd is added again, we try to ADD it, and, if that * fails, we assume it still has the same eventmask. */ if (!nev) return; oldmask = anfds [fd].emask; anfds [fd].emask = nev; /* store the generation counter in the upper 32 bits, the fd in the lower 32 bits */ ev.data.u64 = (uint64_t)(uint32_t)fd | ((uint64_t)(uint32_t)++anfds [fd].egen << 32); ev.events = (nev & EV_READ ? EPOLLIN : 0) | (nev & EV_WRITE ? EPOLLOUT : 0); if (ecb_expect_true (!epoll_ctl (backend_fd, oev && oldmask != nev ? EPOLL_CTL_MOD : EPOLL_CTL_ADD, fd, &ev))) return; if (ecb_expect_true (errno == ENOENT)) { /* if ENOENT then the fd went away, so try to do the right thing */ if (!nev) goto dec_egen; if (!epoll_ctl (backend_fd, EPOLL_CTL_ADD, fd, &ev)) return; } else if (ecb_expect_true (errno == EEXIST)) { /* EEXIST means we ignored a previous DEL, but the fd is still active */ /* if the kernel mask is the same as the new mask, we assume it hasn't changed */ if (oldmask == nev) goto dec_egen; if (!epoll_ctl (backend_fd, EPOLL_CTL_MOD, fd, &ev)) return; } else if (ecb_expect_true (errno == EPERM)) { /* EPERM means the fd is always ready, but epoll is too snobbish */ /* to handle it, unlike select or poll. */ anfds [fd].emask = EV_EMASK_EPERM; /* add fd to epoll_eperms, if not already inside */ if (!(oldmask & EV_EMASK_EPERM)) { array_needsize (int, epoll_eperms, epoll_epermmax, epoll_epermcnt + 1, array_needsize_noinit); epoll_eperms [epoll_epermcnt++] = fd; } return; } else assert (("libev: I/O watcher with invalid fd found in epoll_ctl", errno != EBADF && errno != ELOOP && errno != EINVAL)); fd_kill (EV_A_ fd); dec_egen: /* we didn't successfully call epoll_ctl, so decrement the generation counter again */ --anfds [fd].egen; } static void epoll_poll (EV_P_ ev_tstamp timeout) { int i; int eventcnt; if (ecb_expect_false (epoll_epermcnt)) timeout = EV_TS_CONST (0.); /* epoll wait times cannot be larger than (LONG_MAX - 999UL) / HZ msecs, which is below */ /* the default libev max wait time, however. */ EV_RELEASE_CB; eventcnt = epoll_wait (backend_fd, epoll_events, epoll_eventmax, EV_TS_TO_MSEC (timeout)); EV_ACQUIRE_CB; if (ecb_expect_false (eventcnt < 0)) { if (errno != EINTR) ev_syserr ("(libev) epoll_wait"); return; } for (i = 0; i < eventcnt; ++i) { struct epoll_event *ev = epoll_events + i; int fd = (uint32_t)ev->data.u64; /* mask out the lower 32 bits */ int want = anfds [fd].events; int got = (ev->events & (EPOLLOUT | EPOLLERR | EPOLLHUP) ? EV_WRITE : 0) | (ev->events & (EPOLLIN | EPOLLERR | EPOLLHUP) ? EV_READ : 0); /* * check for spurious notification. * this only finds spurious notifications on egen updates * other spurious notifications will be found by epoll_ctl, below * we assume that fd is always in range, as we never shrink the anfds array */ if (ecb_expect_false ((uint32_t)anfds [fd].egen != (uint32_t)(ev->data.u64 >> 32))) { /* recreate kernel state */ postfork |= 2; continue; } if (ecb_expect_false (got & ~want)) { anfds [fd].emask = want; /* * we received an event but are not interested in it, try mod or del * this often happens because we optimistically do not unregister fds * when we are no longer interested in them, but also when we get spurious * notifications for fds from another process. this is partially handled * above with the gencounter check (== our fd is not the event fd), and * partially here, when epoll_ctl returns an error (== a child has the fd * but we closed it). * note: for events such as POLLHUP, where we can't know whether it refers * to EV_READ or EV_WRITE, we might issue redundant EPOLL_CTL_MOD calls. */ ev->events = (want & EV_READ ? EPOLLIN : 0) | (want & EV_WRITE ? EPOLLOUT : 0); /* pre-2.6.9 kernels require a non-null pointer with EPOLL_CTL_DEL, */ /* which is fortunately easy to do for us. */ if (epoll_ctl (backend_fd, want ? EPOLL_CTL_MOD : EPOLL_CTL_DEL, fd, ev)) { postfork |= 2; /* an error occurred, recreate kernel state */ continue; } } fd_event (EV_A_ fd, got); } /* if the receive array was full, increase its size */ if (ecb_expect_false (eventcnt == epoll_eventmax)) { ev_free (epoll_events); epoll_eventmax = array_nextsize (sizeof (struct epoll_event), epoll_eventmax, epoll_eventmax + 1); epoll_events = (struct epoll_event *)ev_malloc (sizeof (struct epoll_event) * epoll_eventmax); } /* now synthesize events for all fds where epoll fails, while select works... */ for (i = epoll_epermcnt; i--; ) { int fd = epoll_eperms [i]; unsigned char events = anfds [fd].events & (EV_READ | EV_WRITE); if (anfds [fd].emask & EV_EMASK_EPERM && events) fd_event (EV_A_ fd, events); else { epoll_eperms [i] = epoll_eperms [--epoll_epermcnt]; anfds [fd].emask = 0; } } } static int epoll_epoll_create (void) { int fd; #if defined EPOLL_CLOEXEC && !defined __ANDROID__ fd = epoll_create1 (EPOLL_CLOEXEC); if (fd < 0 && (errno == EINVAL || errno == ENOSYS)) #endif { fd = epoll_create (256); if (fd >= 0) fcntl (fd, F_SETFD, FD_CLOEXEC); } return fd; } inline_size int epoll_init (EV_P_ int flags) { if ((backend_fd = epoll_epoll_create ()) < 0) return 0; backend_mintime = EV_TS_CONST (1e-3); /* epoll does sometimes return early, this is just to avoid the worst */ backend_modify = epoll_modify; backend_poll = epoll_poll; epoll_eventmax = 64; /* initial number of events receivable per poll */ epoll_events = (struct epoll_event *)ev_malloc (sizeof (struct epoll_event) * epoll_eventmax); return EVBACKEND_EPOLL; } inline_size void epoll_destroy (EV_P) { ev_free (epoll_events); array_free (epoll_eperm, EMPTY); } ecb_cold static void epoll_fork (EV_P) { close (backend_fd); while ((backend_fd = epoll_epoll_create ()) < 0) ev_syserr ("(libev) epoll_create"); fd_rearm_all (EV_A); } libev-4.33/ev_select.c0000644000000000000000000002122513556456317011571 00000000000000/* * libev select fd activity backend * * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #ifndef _WIN32 /* for unix systems */ # include # ifndef __hpux /* for REAL unix systems */ # include # endif #endif #ifndef EV_SELECT_USE_FD_SET # ifdef NFDBITS # define EV_SELECT_USE_FD_SET 0 # else # define EV_SELECT_USE_FD_SET 1 # endif #endif #if EV_SELECT_IS_WINSOCKET # undef EV_SELECT_USE_FD_SET # define EV_SELECT_USE_FD_SET 1 # undef NFDBITS # define NFDBITS 0 #endif #if !EV_SELECT_USE_FD_SET # define NFDBYTES (NFDBITS / 8) #endif #include static void select_modify (EV_P_ int fd, int oev, int nev) { if (oev == nev) return; { #if EV_SELECT_USE_FD_SET #if EV_SELECT_IS_WINSOCKET SOCKET handle = anfds [fd].handle; #else int handle = fd; #endif assert (("libev: fd >= FD_SETSIZE passed to fd_set-based select backend", fd < FD_SETSIZE)); /* FD_SET is broken on windows (it adds the fd to a set twice or more, * which eventually leads to overflows). Need to call it only on changes. */ #if EV_SELECT_IS_WINSOCKET if ((oev ^ nev) & EV_READ) #endif if (nev & EV_READ) FD_SET (handle, (fd_set *)vec_ri); else FD_CLR (handle, (fd_set *)vec_ri); #if EV_SELECT_IS_WINSOCKET if ((oev ^ nev) & EV_WRITE) #endif if (nev & EV_WRITE) FD_SET (handle, (fd_set *)vec_wi); else FD_CLR (handle, (fd_set *)vec_wi); #else int word = fd / NFDBITS; fd_mask mask = 1UL << (fd % NFDBITS); if (ecb_expect_false (vec_max <= word)) { int new_max = word + 1; vec_ri = ev_realloc (vec_ri, new_max * NFDBYTES); vec_ro = ev_realloc (vec_ro, new_max * NFDBYTES); /* could free/malloc */ vec_wi = ev_realloc (vec_wi, new_max * NFDBYTES); vec_wo = ev_realloc (vec_wo, new_max * NFDBYTES); /* could free/malloc */ #ifdef _WIN32 vec_eo = ev_realloc (vec_eo, new_max * NFDBYTES); /* could free/malloc */ #endif for (; vec_max < new_max; ++vec_max) ((fd_mask *)vec_ri) [vec_max] = ((fd_mask *)vec_wi) [vec_max] = 0; } ((fd_mask *)vec_ri) [word] |= mask; if (!(nev & EV_READ)) ((fd_mask *)vec_ri) [word] &= ~mask; ((fd_mask *)vec_wi) [word] |= mask; if (!(nev & EV_WRITE)) ((fd_mask *)vec_wi) [word] &= ~mask; #endif } } static void select_poll (EV_P_ ev_tstamp timeout) { struct timeval tv; int res; int fd_setsize; EV_RELEASE_CB; EV_TV_SET (tv, timeout); #if EV_SELECT_USE_FD_SET fd_setsize = sizeof (fd_set); #else fd_setsize = vec_max * NFDBYTES; #endif memcpy (vec_ro, vec_ri, fd_setsize); memcpy (vec_wo, vec_wi, fd_setsize); #ifdef _WIN32 /* pass in the write set as except set. * the idea behind this is to work around a windows bug that causes * errors to be reported as an exception and not by setting * the writable bit. this is so uncontrollably lame. */ memcpy (vec_eo, vec_wi, fd_setsize); res = select (vec_max * NFDBITS, (fd_set *)vec_ro, (fd_set *)vec_wo, (fd_set *)vec_eo, &tv); #elif EV_SELECT_USE_FD_SET fd_setsize = anfdmax < FD_SETSIZE ? anfdmax : FD_SETSIZE; res = select (fd_setsize, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv); #else res = select (vec_max * NFDBITS, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv); #endif EV_ACQUIRE_CB; if (ecb_expect_false (res < 0)) { #if EV_SELECT_IS_WINSOCKET errno = WSAGetLastError (); #endif #ifdef WSABASEERR /* on windows, select returns incompatible error codes, fix this */ if (errno >= WSABASEERR && errno < WSABASEERR + 1000) if (errno == WSAENOTSOCK) errno = EBADF; else errno -= WSABASEERR; #endif #ifdef _WIN32 /* select on windows erroneously returns EINVAL when no fd sets have been * provided (this is documented). what microsoft doesn't tell you that this bug * exists even when the fd sets _are_ provided, so we have to check for this bug * here and emulate by sleeping manually. * we also get EINVAL when the timeout is invalid, but we ignore this case here * and assume that EINVAL always means: you have to wait manually. */ if (errno == EINVAL) { if (timeout) { unsigned long ms = EV_TS_TO_MSEC (timeout); Sleep (ms ? ms : 1); } return; } #endif if (errno == EBADF) fd_ebadf (EV_A); else if (errno == ENOMEM && !syserr_cb) fd_enomem (EV_A); else if (errno != EINTR) ev_syserr ("(libev) select"); return; } #if EV_SELECT_USE_FD_SET { int fd; for (fd = 0; fd < anfdmax; ++fd) if (anfds [fd].events) { int events = 0; #if EV_SELECT_IS_WINSOCKET SOCKET handle = anfds [fd].handle; #else int handle = fd; #endif if (FD_ISSET (handle, (fd_set *)vec_ro)) events |= EV_READ; if (FD_ISSET (handle, (fd_set *)vec_wo)) events |= EV_WRITE; #ifdef _WIN32 if (FD_ISSET (handle, (fd_set *)vec_eo)) events |= EV_WRITE; #endif if (ecb_expect_true (events)) fd_event (EV_A_ fd, events); } } #else { int word, bit; for (word = vec_max; word--; ) { fd_mask word_r = ((fd_mask *)vec_ro) [word]; fd_mask word_w = ((fd_mask *)vec_wo) [word]; #ifdef _WIN32 word_w |= ((fd_mask *)vec_eo) [word]; #endif if (word_r || word_w) for (bit = NFDBITS; bit--; ) { fd_mask mask = 1UL << bit; int events = 0; events |= word_r & mask ? EV_READ : 0; events |= word_w & mask ? EV_WRITE : 0; if (ecb_expect_true (events)) fd_event (EV_A_ word * NFDBITS + bit, events); } } } #endif } inline_size int select_init (EV_P_ int flags) { backend_mintime = EV_TS_CONST (1e-6); backend_modify = select_modify; backend_poll = select_poll; #if EV_SELECT_USE_FD_SET vec_ri = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_ri); vec_ro = ev_malloc (sizeof (fd_set)); vec_wi = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_wi); vec_wo = ev_malloc (sizeof (fd_set)); #ifdef _WIN32 vec_eo = ev_malloc (sizeof (fd_set)); #endif #else vec_max = 0; vec_ri = 0; vec_ro = 0; vec_wi = 0; vec_wo = 0; #ifdef _WIN32 vec_eo = 0; #endif #endif return EVBACKEND_SELECT; } inline_size void select_destroy (EV_P) { ev_free (vec_ri); ev_free (vec_ro); ev_free (vec_wi); ev_free (vec_wo); #ifdef _WIN32 ev_free (vec_eo); #endif } libev-4.33/ev_poll.c0000644000000000000000000001102313556456317011253 00000000000000/* * libev poll fd activity backend * * Copyright (c) 2007,2008,2009,2010,2011,2016,2019 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #include inline_size void array_needsize_pollidx (int *base, int offset, int count) { /* using memset (.., -1, ...) is tempting, we we try * to be ultraportable */ base += offset; while (count--) *base++ = -1; } static void poll_modify (EV_P_ int fd, int oev, int nev) { int idx; if (oev == nev) return; array_needsize (int, pollidxs, pollidxmax, fd + 1, array_needsize_pollidx); idx = pollidxs [fd]; if (idx < 0) /* need to allocate a new pollfd */ { pollidxs [fd] = idx = pollcnt++; array_needsize (struct pollfd, polls, pollmax, pollcnt, array_needsize_noinit); polls [idx].fd = fd; } assert (polls [idx].fd == fd); if (nev) polls [idx].events = (nev & EV_READ ? POLLIN : 0) | (nev & EV_WRITE ? POLLOUT : 0); else /* remove pollfd */ { pollidxs [fd] = -1; if (ecb_expect_true (idx < --pollcnt)) { polls [idx] = polls [pollcnt]; pollidxs [polls [idx].fd] = idx; } } } static void poll_poll (EV_P_ ev_tstamp timeout) { struct pollfd *p; int res; EV_RELEASE_CB; res = poll (polls, pollcnt, EV_TS_TO_MSEC (timeout)); EV_ACQUIRE_CB; if (ecb_expect_false (res < 0)) { if (errno == EBADF) fd_ebadf (EV_A); else if (errno == ENOMEM && !syserr_cb) fd_enomem (EV_A); else if (errno != EINTR) ev_syserr ("(libev) poll"); } else for (p = polls; res; ++p) { assert (("libev: poll returned illegal result, broken BSD kernel?", p < polls + pollcnt)); if (ecb_expect_false (p->revents)) /* this expect is debatable */ { --res; if (ecb_expect_false (p->revents & POLLNVAL)) { assert (("libev: poll found invalid fd in poll set", 0)); fd_kill (EV_A_ p->fd); } else fd_event ( EV_A_ p->fd, (p->revents & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) | (p->revents & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) ); } } } inline_size int poll_init (EV_P_ int flags) { backend_mintime = EV_TS_CONST (1e-3); backend_modify = poll_modify; backend_poll = poll_poll; pollidxs = 0; pollidxmax = 0; polls = 0; pollmax = 0; pollcnt = 0; return EVBACKEND_POLL; } inline_size void poll_destroy (EV_P) { ev_free (pollidxs); ev_free (polls); } libev-4.33/ev_kqueue.c0000644000000000000000000001566013556456317011617 00000000000000/* * libev kqueue backend * * Copyright (c) 2007,2008,2009,2010,2011,2012,2013,2016,2019 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #include #include #include #include #include inline_speed void kqueue_change (EV_P_ int fd, int filter, int flags, int fflags) { ++kqueue_changecnt; array_needsize (struct kevent, kqueue_changes, kqueue_changemax, kqueue_changecnt, array_needsize_noinit); EV_SET (&kqueue_changes [kqueue_changecnt - 1], fd, filter, flags, fflags, 0, 0); } /* OS X at least needs this */ #ifndef EV_ENABLE # define EV_ENABLE 0 #endif #ifndef NOTE_EOF # define NOTE_EOF 0 #endif static void kqueue_modify (EV_P_ int fd, int oev, int nev) { if (oev != nev) { if (oev & EV_READ) kqueue_change (EV_A_ fd, EVFILT_READ , EV_DELETE, 0); if (oev & EV_WRITE) kqueue_change (EV_A_ fd, EVFILT_WRITE, EV_DELETE, 0); } /* to detect close/reopen reliably, we have to re-add */ /* event requests even when oev == nev */ if (nev & EV_READ) kqueue_change (EV_A_ fd, EVFILT_READ , EV_ADD | EV_ENABLE, NOTE_EOF); if (nev & EV_WRITE) kqueue_change (EV_A_ fd, EVFILT_WRITE, EV_ADD | EV_ENABLE, NOTE_EOF); } static void kqueue_poll (EV_P_ ev_tstamp timeout) { int res, i; struct timespec ts; /* need to resize so there is enough space for errors */ if (kqueue_changecnt > kqueue_eventmax) { ev_free (kqueue_events); kqueue_eventmax = array_nextsize (sizeof (struct kevent), kqueue_eventmax, kqueue_changecnt); kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax); } EV_RELEASE_CB; EV_TS_SET (ts, timeout); res = kevent (backend_fd, kqueue_changes, kqueue_changecnt, kqueue_events, kqueue_eventmax, &ts); EV_ACQUIRE_CB; kqueue_changecnt = 0; if (ecb_expect_false (res < 0)) { if (errno != EINTR) ev_syserr ("(libev) kqueue kevent"); return; } for (i = 0; i < res; ++i) { int fd = kqueue_events [i].ident; if (ecb_expect_false (kqueue_events [i].flags & EV_ERROR)) { int err = kqueue_events [i].data; /* we are only interested in errors for fds that we are interested in :) */ if (anfds [fd].events) { if (err == ENOENT) /* resubmit changes on ENOENT */ kqueue_modify (EV_A_ fd, 0, anfds [fd].events); else if (err == EBADF) /* on EBADF, we re-check the fd */ { if (fd_valid (fd)) kqueue_modify (EV_A_ fd, 0, anfds [fd].events); else { assert (("libev: kqueue found invalid fd", 0)); fd_kill (EV_A_ fd); } } else /* on all other errors, we error out on the fd */ { assert (("libev: kqueue found invalid fd", 0)); fd_kill (EV_A_ fd); } } } else fd_event ( EV_A_ fd, kqueue_events [i].filter == EVFILT_READ ? EV_READ : kqueue_events [i].filter == EVFILT_WRITE ? EV_WRITE : 0 ); } if (ecb_expect_false (res == kqueue_eventmax)) { ev_free (kqueue_events); kqueue_eventmax = array_nextsize (sizeof (struct kevent), kqueue_eventmax, kqueue_eventmax + 1); kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax); } } inline_size int kqueue_init (EV_P_ int flags) { /* initialize the kernel queue */ kqueue_fd_pid = getpid (); if ((backend_fd = kqueue ()) < 0) return 0; fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */ backend_mintime = EV_TS_CONST (1e-9); /* apparently, they did the right thing in freebsd */ backend_modify = kqueue_modify; backend_poll = kqueue_poll; kqueue_eventmax = 64; /* initial number of events receivable per poll */ kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax); kqueue_changes = 0; kqueue_changemax = 0; kqueue_changecnt = 0; return EVBACKEND_KQUEUE; } inline_size void kqueue_destroy (EV_P) { ev_free (kqueue_events); ev_free (kqueue_changes); } inline_size void kqueue_fork (EV_P) { /* some BSD kernels don't just destroy the kqueue itself, * but also close the fd, which isn't documented, and * impossible to support properly. * we remember the pid of the kqueue call and only close * the fd if the pid is still the same. * this leaks fds on sane kernels, but BSD interfaces are * notoriously buggy and rarely get fixed. */ pid_t newpid = getpid (); if (newpid == kqueue_fd_pid) close (backend_fd); kqueue_fd_pid = newpid; while ((backend_fd = kqueue ()) < 0) ev_syserr ("(libev) kqueue"); fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* re-register interest in fds */ fd_rearm_all (EV_A); } /* sys/event.h defines EV_ERROR */ #undef EV_ERROR libev-4.33/ev_port.c0000644000000000000000000001460013556456317011275 00000000000000/* * libev solaris event port backend * * Copyright (c) 2007,2008,2009,2010,2011,2019 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ /* useful reading: * * http://bugs.opensolaris.org/view_bug.do?bug_id=6268715 (random results) * http://bugs.opensolaris.org/view_bug.do?bug_id=6455223 (just totally broken) * http://bugs.opensolaris.org/view_bug.do?bug_id=6873782 (manpage ETIME) * http://bugs.opensolaris.org/view_bug.do?bug_id=6874410 (implementation ETIME) * http://www.mail-archive.com/networking-discuss@opensolaris.org/msg11898.html ETIME vs. nget * http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/lib/libc/port/gen/event_port.c (libc) * http://cvs.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/fs/portfs/port.c#1325 (kernel) */ #include #include #include #include #include #include inline_speed void port_associate_and_check (EV_P_ int fd, int ev) { if (0 > port_associate ( backend_fd, PORT_SOURCE_FD, fd, (ev & EV_READ ? POLLIN : 0) | (ev & EV_WRITE ? POLLOUT : 0), 0 ) ) { if (errno == EBADFD) { assert (("libev: port_associate found invalid fd", errno != EBADFD)); fd_kill (EV_A_ fd); } else ev_syserr ("(libev) port_associate"); } } static void port_modify (EV_P_ int fd, int oev, int nev) { /* we need to reassociate no matter what, as closes are * once more silently being discarded. */ if (!nev) { if (oev) port_dissociate (backend_fd, PORT_SOURCE_FD, fd); } else port_associate_and_check (EV_A_ fd, nev); } static void port_poll (EV_P_ ev_tstamp timeout) { int res, i; struct timespec ts; uint_t nget = 1; /* we initialise this to something we will skip in the loop, as */ /* port_getn can return with nget unchanged, but no indication */ /* whether it was the original value or has been updated :/ */ port_events [0].portev_source = 0; EV_RELEASE_CB; EV_TS_SET (ts, timeout); res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts); EV_ACQUIRE_CB; /* port_getn may or may not set nget on error */ /* so we rely on port_events [0].portev_source not being updated */ if (res == -1 && errno != ETIME && errno != EINTR) ev_syserr ("(libev) port_getn (see http://bugs.opensolaris.org/view_bug.do?bug_id=6268715, try LIBEV_FLAGS=3 env variable)"); for (i = 0; i < nget; ++i) { if (port_events [i].portev_source == PORT_SOURCE_FD) { int fd = port_events [i].portev_object; fd_event ( EV_A_ fd, (port_events [i].portev_events & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) | (port_events [i].portev_events & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) ); fd_change (EV_A_ fd, EV__IOFDSET); } } if (ecb_expect_false (nget == port_eventmax)) { ev_free (port_events); port_eventmax = array_nextsize (sizeof (port_event_t), port_eventmax, port_eventmax + 1); port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax); } } inline_size int port_init (EV_P_ int flags) { /* Initialize the kernel queue */ if ((backend_fd = port_create ()) < 0) return 0; assert (("libev: PORT_SOURCE_FD must not be zero", PORT_SOURCE_FD)); fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */ /* if my reading of the opensolaris kernel sources are correct, then * opensolaris does something very stupid: it checks if the time has already * elapsed and doesn't round up if that is the case, otherwise it DOES round * up. Since we can't know what the case is, we need to guess by using a * "large enough" timeout. Normally, 1e-9 would be correct. */ backend_mintime = EV_TS_CONST (1e-3); /* needed to compensate for port_getn returning early */ backend_modify = port_modify; backend_poll = port_poll; port_eventmax = 64; /* initial number of events receivable per poll */ port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax); return EVBACKEND_PORT; } inline_size void port_destroy (EV_P) { ev_free (port_events); } inline_size void port_fork (EV_P) { close (backend_fd); while ((backend_fd = port_create ()) < 0) ev_syserr ("(libev) port"); fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* re-register interest in fds */ fd_rearm_all (EV_A); } libev-4.33/ev_linuxaio.c0000644000000000000000000005176613601426606012144 00000000000000/* * libev linux aio fd activity backend * * Copyright (c) 2019 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ /* * general notes about linux aio: * * a) at first, the linux aio IOCB_CMD_POLL functionality introduced in * 4.18 looks too good to be true: both watchers and events can be * batched, and events can even be handled in userspace using * a ring buffer shared with the kernel. watchers can be canceled * regardless of whether the fd has been closed. no problems with fork. * ok, the ring buffer is 200% undocumented (there isn't even a * header file), but otherwise, it's pure bliss! * b) ok, watchers are one-shot, so you have to re-arm active ones * on every iteration. so much for syscall-less event handling, * but at least these re-arms can be batched, no big deal, right? * c) well, linux as usual: the documentation lies to you: io_submit * sometimes returns EINVAL because the kernel doesn't feel like * handling your poll mask - ttys can be polled for POLLOUT, * POLLOUT|POLLIN, but polling for POLLIN fails. just great, * so we have to fall back to something else (hello, epoll), * but at least the fallback can be slow, because these are * exceptional cases, right? * d) hmm, you have to tell the kernel the maximum number of watchers * you want to queue when initialising the aio context. but of * course the real limit is magically calculated in the kernel, and * is often higher then we asked for. so we just have to destroy * the aio context and re-create it a bit larger if we hit the limit. * (starts to remind you of epoll? well, it's a bit more deterministic * and less gambling, but still ugly as hell). * e) that's when you find out you can also hit an arbitrary system-wide * limit. or the kernel simply doesn't want to handle your watchers. * what the fuck do we do then? you guessed it, in the middle * of event handling we have to switch to 100% epoll polling. and * that better is as fast as normal epoll polling, so you practically * have to use the normal epoll backend with all its quirks. * f) end result of this train wreck: it inherits all the disadvantages * from epoll, while adding a number on its own. why even bother to use * it? because if conditions are right and your fds are supported and you * don't hit a limit, this backend is actually faster, doesn't gamble with * your fds, batches watchers and events and doesn't require costly state * recreates. well, until it does. * g) all of this makes this backend use almost twice as much code as epoll. * which in turn uses twice as much code as poll. and that#s not counting * the fact that this backend also depends on the epoll backend, making * it three times as much code as poll, or kqueue. * h) bleah. why can't linux just do kqueue. sure kqueue is ugly, but by now * it's clear that whatever linux comes up with is far, far, far worse. */ #include /* actually linux/time.h, but we must assume they are compatible */ #include #include /*****************************************************************************/ /* syscall wrapdadoop - this section has the raw api/abi definitions */ #include /* no glibc wrappers */ /* aio_abi.h is not versioned in any way, so we cannot test for its existance */ #define IOCB_CMD_POLL 5 /* taken from linux/fs/aio.c. yup, that's a .c file. * not only is this totally undocumented, not even the source code * can tell you what the future semantics of compat_features and * incompat_features are, or what header_length actually is for. */ #define AIO_RING_MAGIC 0xa10a10a1 #define EV_AIO_RING_INCOMPAT_FEATURES 0 struct aio_ring { unsigned id; /* kernel internal index number */ unsigned nr; /* number of io_events */ unsigned head; /* Written to by userland or by kernel. */ unsigned tail; unsigned magic; unsigned compat_features; unsigned incompat_features; unsigned header_length; /* size of aio_ring */ struct io_event io_events[0]; }; inline_size int evsys_io_setup (unsigned nr_events, aio_context_t *ctx_idp) { return ev_syscall2 (SYS_io_setup, nr_events, ctx_idp); } inline_size int evsys_io_destroy (aio_context_t ctx_id) { return ev_syscall1 (SYS_io_destroy, ctx_id); } inline_size int evsys_io_submit (aio_context_t ctx_id, long nr, struct iocb *cbp[]) { return ev_syscall3 (SYS_io_submit, ctx_id, nr, cbp); } inline_size int evsys_io_cancel (aio_context_t ctx_id, struct iocb *cbp, struct io_event *result) { return ev_syscall3 (SYS_io_cancel, ctx_id, cbp, result); } inline_size int evsys_io_getevents (aio_context_t ctx_id, long min_nr, long nr, struct io_event *events, struct timespec *timeout) { return ev_syscall5 (SYS_io_getevents, ctx_id, min_nr, nr, events, timeout); } /*****************************************************************************/ /* actual backed implementation */ ecb_cold static int linuxaio_nr_events (EV_P) { /* we start with 16 iocbs and incraese from there * that's tiny, but the kernel has a rather low system-wide * limit that can be reached quickly, so let's be parsimonious * with this resource. * Rest assured, the kernel generously rounds up small and big numbers * in different ways (but doesn't seem to charge you for it). * The 15 here is because the kernel usually has a power of two as aio-max-nr, * and this helps to take advantage of that limit. */ /* we try to fill 4kB pages exactly. * the ring buffer header is 32 bytes, every io event is 32 bytes. * the kernel takes the io requests number, doubles it, adds 2 * and adds the ring buffer. * the way we use this is by starting low, and then roughly doubling the * size each time we hit a limit. */ int requests = 15 << linuxaio_iteration; int one_page = (4096 / sizeof (struct io_event) ) / 2; /* how many fit into one page */ int first_page = ((4096 - sizeof (struct aio_ring)) / sizeof (struct io_event) - 2) / 2; /* how many fit into the first page */ /* if everything fits into one page, use count exactly */ if (requests > first_page) /* otherwise, round down to full pages and add the first page */ requests = requests / one_page * one_page + first_page; return requests; } /* we use out own wrapper structure in case we ever want to do something "clever" */ typedef struct aniocb { struct iocb io; /*int inuse;*/ } *ANIOCBP; inline_size void linuxaio_array_needsize_iocbp (ANIOCBP *base, int offset, int count) { while (count--) { /* TODO: quite the overhead to allocate every iocb separately, maybe use our own allocator? */ ANIOCBP iocb = (ANIOCBP)ev_malloc (sizeof (*iocb)); /* full zero initialise is probably not required at the moment, but * this is not well documented, so we better do it. */ memset (iocb, 0, sizeof (*iocb)); iocb->io.aio_lio_opcode = IOCB_CMD_POLL; iocb->io.aio_fildes = offset; base [offset++] = iocb; } } ecb_cold static void linuxaio_free_iocbp (EV_P) { while (linuxaio_iocbpmax--) ev_free (linuxaio_iocbps [linuxaio_iocbpmax]); linuxaio_iocbpmax = 0; /* next resize will completely reallocate the array, at some overhead */ } static void linuxaio_modify (EV_P_ int fd, int oev, int nev) { array_needsize (ANIOCBP, linuxaio_iocbps, linuxaio_iocbpmax, fd + 1, linuxaio_array_needsize_iocbp); ANIOCBP iocb = linuxaio_iocbps [fd]; ANFD *anfd = &anfds [fd]; if (ecb_expect_false (iocb->io.aio_reqprio < 0)) { /* we handed this fd over to epoll, so undo this first */ /* we do it manually because the optimisations on epoll_modify won't do us any good */ epoll_ctl (backend_fd, EPOLL_CTL_DEL, fd, 0); anfd->emask = 0; iocb->io.aio_reqprio = 0; } else if (ecb_expect_false (iocb->io.aio_buf)) { /* iocb active, so cancel it first before resubmit */ /* this assumes we only ever get one call per fd per loop iteration */ for (;;) { /* on all relevant kernels, io_cancel fails with EINPROGRESS on "success" */ if (ecb_expect_false (evsys_io_cancel (linuxaio_ctx, &iocb->io, (struct io_event *)0) == 0)) break; if (ecb_expect_true (errno == EINPROGRESS)) break; /* the EINPROGRESS test is for nicer error message. clumsy. */ if (errno != EINTR) { assert (("libev: linuxaio unexpected io_cancel failed", errno != EINTR && errno != EINPROGRESS)); break; } } /* increment generation counter to avoid handling old events */ ++anfd->egen; } iocb->io.aio_buf = (nev & EV_READ ? POLLIN : 0) | (nev & EV_WRITE ? POLLOUT : 0); if (nev) { iocb->io.aio_data = (uint32_t)fd | ((__u64)(uint32_t)anfd->egen << 32); /* queue iocb up for io_submit */ /* this assumes we only ever get one call per fd per loop iteration */ ++linuxaio_submitcnt; array_needsize (struct iocb *, linuxaio_submits, linuxaio_submitmax, linuxaio_submitcnt, array_needsize_noinit); linuxaio_submits [linuxaio_submitcnt - 1] = &iocb->io; } } static void linuxaio_epoll_cb (EV_P_ struct ev_io *w, int revents) { epoll_poll (EV_A_ 0); } inline_speed void linuxaio_fd_rearm (EV_P_ int fd) { anfds [fd].events = 0; linuxaio_iocbps [fd]->io.aio_buf = 0; fd_change (EV_A_ fd, EV_ANFD_REIFY); } static void linuxaio_parse_events (EV_P_ struct io_event *ev, int nr) { while (nr) { int fd = ev->data & 0xffffffff; uint32_t gen = ev->data >> 32; int res = ev->res; assert (("libev: iocb fd must be in-bounds", fd >= 0 && fd < anfdmax)); /* only accept events if generation counter matches */ if (ecb_expect_true (gen == (uint32_t)anfds [fd].egen)) { /* feed events, we do not expect or handle POLLNVAL */ fd_event ( EV_A_ fd, (res & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) | (res & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) ); /* linux aio is oneshot: rearm fd. TODO: this does more work than strictly needed */ linuxaio_fd_rearm (EV_A_ fd); } --nr; ++ev; } } /* get any events from ring buffer, return true if any were handled */ static int linuxaio_get_events_from_ring (EV_P) { struct aio_ring *ring = (struct aio_ring *)linuxaio_ctx; unsigned head, tail; /* the kernel reads and writes both of these variables, */ /* as a C extension, we assume that volatile use here */ /* both makes reads atomic and once-only */ head = *(volatile unsigned *)&ring->head; ECB_MEMORY_FENCE_ACQUIRE; tail = *(volatile unsigned *)&ring->tail; if (head == tail) return 0; /* parse all available events, but only once, to avoid starvation */ if (ecb_expect_true (tail > head)) /* normal case around */ linuxaio_parse_events (EV_A_ ring->io_events + head, tail - head); else /* wrapped around */ { linuxaio_parse_events (EV_A_ ring->io_events + head, ring->nr - head); linuxaio_parse_events (EV_A_ ring->io_events, tail); } ECB_MEMORY_FENCE_RELEASE; /* as an extension to C, we hope that the volatile will make this atomic and once-only */ *(volatile unsigned *)&ring->head = tail; return 1; } inline_size int linuxaio_ringbuf_valid (EV_P) { struct aio_ring *ring = (struct aio_ring *)linuxaio_ctx; return ecb_expect_true (ring->magic == AIO_RING_MAGIC) && ring->incompat_features == EV_AIO_RING_INCOMPAT_FEATURES && ring->header_length == sizeof (struct aio_ring); /* TODO: or use it to find io_event[0]? */ } /* read at least one event from kernel, or timeout */ inline_size void linuxaio_get_events (EV_P_ ev_tstamp timeout) { struct timespec ts; struct io_event ioev[8]; /* 256 octet stack space */ int want = 1; /* how many events to request */ int ringbuf_valid = linuxaio_ringbuf_valid (EV_A); if (ecb_expect_true (ringbuf_valid)) { /* if the ring buffer has any events, we don't wait or call the kernel at all */ if (linuxaio_get_events_from_ring (EV_A)) return; /* if the ring buffer is empty, and we don't have a timeout, then don't call the kernel */ if (!timeout) return; } else /* no ringbuffer, request slightly larger batch */ want = sizeof (ioev) / sizeof (ioev [0]); /* no events, so wait for some * for fairness reasons, we do this in a loop, to fetch all events */ for (;;) { int res; EV_RELEASE_CB; EV_TS_SET (ts, timeout); res = evsys_io_getevents (linuxaio_ctx, 1, want, ioev, &ts); EV_ACQUIRE_CB; if (res < 0) if (errno == EINTR) /* ignored, retry */; else ev_syserr ("(libev) linuxaio io_getevents"); else if (res) { /* at least one event available, handle them */ linuxaio_parse_events (EV_A_ ioev, res); if (ecb_expect_true (ringbuf_valid)) { /* if we have a ring buffer, handle any remaining events in it */ linuxaio_get_events_from_ring (EV_A); /* at this point, we should have handled all outstanding events */ break; } else if (res < want) /* otherwise, if there were fewere events than we wanted, we assume there are no more */ break; } else break; /* no events from the kernel, we are done */ timeout = EV_TS_CONST (0.); /* only wait in the first iteration */ } } inline_size int linuxaio_io_setup (EV_P) { linuxaio_ctx = 0; return evsys_io_setup (linuxaio_nr_events (EV_A), &linuxaio_ctx); } static void linuxaio_poll (EV_P_ ev_tstamp timeout) { int submitted; /* first phase: submit new iocbs */ /* io_submit might return less than the requested number of iocbs */ /* this is, afaics, only because of errors, but we go by the book and use a loop, */ /* which allows us to pinpoint the erroneous iocb */ for (submitted = 0; submitted < linuxaio_submitcnt; ) { int res = evsys_io_submit (linuxaio_ctx, linuxaio_submitcnt - submitted, linuxaio_submits + submitted); if (ecb_expect_false (res < 0)) if (errno == EINVAL) { /* This happens for unsupported fds, officially, but in my testing, * also randomly happens for supported fds. We fall back to good old * poll() here, under the assumption that this is a very rare case. * See https://lore.kernel.org/patchwork/patch/1047453/ to see * discussion about such a case (ttys) where polling for POLLIN * fails but POLLIN|POLLOUT works. */ struct iocb *iocb = linuxaio_submits [submitted]; epoll_modify (EV_A_ iocb->aio_fildes, 0, anfds [iocb->aio_fildes].events); iocb->aio_reqprio = -1; /* mark iocb as epoll */ res = 1; /* skip this iocb - another iocb, another chance */ } else if (errno == EAGAIN) { /* This happens when the ring buffer is full, or some other shit we * don't know and isn't documented. Most likely because we have too * many requests and linux aio can't be assed to handle them. * In this case, we try to allocate a larger ring buffer, freeing * ours first. This might fail, in which case we have to fall back to 100% * epoll. * God, how I hate linux not getting its act together. Ever. */ evsys_io_destroy (linuxaio_ctx); linuxaio_submitcnt = 0; /* rearm all fds with active iocbs */ { int fd; for (fd = 0; fd < linuxaio_iocbpmax; ++fd) if (linuxaio_iocbps [fd]->io.aio_buf) linuxaio_fd_rearm (EV_A_ fd); } ++linuxaio_iteration; if (linuxaio_io_setup (EV_A) < 0) { /* TODO: rearm all and recreate epoll backend from scratch */ /* TODO: might be more prudent? */ /* to bad, we can't get a new aio context, go 100% epoll */ linuxaio_free_iocbp (EV_A); ev_io_stop (EV_A_ &linuxaio_epoll_w); ev_ref (EV_A); linuxaio_ctx = 0; backend = EVBACKEND_EPOLL; backend_modify = epoll_modify; backend_poll = epoll_poll; } timeout = EV_TS_CONST (0.); /* it's easiest to handle this mess in another iteration */ return; } else if (errno == EBADF) { assert (("libev: event loop rejected bad fd", errno != EBADF)); fd_kill (EV_A_ linuxaio_submits [submitted]->aio_fildes); res = 1; /* skip this iocb */ } else if (errno == EINTR) /* not seen in reality, not documented */ res = 0; /* silently ignore and retry */ else { ev_syserr ("(libev) linuxaio io_submit"); res = 0; } submitted += res; } linuxaio_submitcnt = 0; /* second phase: fetch and parse events */ linuxaio_get_events (EV_A_ timeout); } inline_size int linuxaio_init (EV_P_ int flags) { /* would be great to have a nice test for IOCB_CMD_POLL instead */ /* also: test some semi-common fd types, such as files and ttys in recommended_backends */ /* 4.18 introduced IOCB_CMD_POLL, 4.19 made epoll work, and we need that */ if (ev_linux_version () < 0x041300) return 0; if (!epoll_init (EV_A_ 0)) return 0; linuxaio_iteration = 0; if (linuxaio_io_setup (EV_A) < 0) { epoll_destroy (EV_A); return 0; } ev_io_init (&linuxaio_epoll_w, linuxaio_epoll_cb, backend_fd, EV_READ); ev_set_priority (&linuxaio_epoll_w, EV_MAXPRI); ev_io_start (EV_A_ &linuxaio_epoll_w); ev_unref (EV_A); /* watcher should not keep loop alive */ backend_modify = linuxaio_modify; backend_poll = linuxaio_poll; linuxaio_iocbpmax = 0; linuxaio_iocbps = 0; linuxaio_submits = 0; linuxaio_submitmax = 0; linuxaio_submitcnt = 0; return EVBACKEND_LINUXAIO; } inline_size void linuxaio_destroy (EV_P) { epoll_destroy (EV_A); linuxaio_free_iocbp (EV_A); evsys_io_destroy (linuxaio_ctx); /* fails in child, aio context is destroyed */ } ecb_cold static void linuxaio_fork (EV_P) { linuxaio_submitcnt = 0; /* all pointers were invalidated */ linuxaio_free_iocbp (EV_A); /* this frees all iocbs, which is very heavy-handed */ evsys_io_destroy (linuxaio_ctx); /* fails in child, aio context is destroyed */ linuxaio_iteration = 0; /* we start over in the child */ while (linuxaio_io_setup (EV_A) < 0) ev_syserr ("(libev) linuxaio io_setup"); /* forking epoll should also effectively unregister all fds from the backend */ epoll_fork (EV_A); /* epoll_fork already did this. hopefully */ /*fd_rearm_all (EV_A);*/ ev_io_stop (EV_A_ &linuxaio_epoll_w); ev_io_set (EV_A_ &linuxaio_epoll_w, backend_fd, EV_READ); ev_io_start (EV_A_ &linuxaio_epoll_w); } libev-4.33/ev_iouring.c0000644000000000000000000005133413631212545011755 00000000000000/* * libev linux io_uring fd activity backend * * Copyright (c) 2019-2020 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ /* * general notes about linux io_uring: * * a) it's the best interface I have seen so far. on linux. * b) best is not necessarily very good. * c) it's better than the aio mess, doesn't suffer from the fork problems * of linux aio or epoll and so on and so on. and you could do event stuff * without any syscalls. what's not to like? * d) ok, it's vastly more complex, but that's ok, really. * e) why two mmaps instead of one? one would be more space-efficient, * and I can't see what benefit two would have (other than being * somehow resizable/relocatable, but that's apparently not possible). * f) hmm, it's practically undebuggable (gdb can't access the memory, and * the bizarre way structure offsets are communicated makes it hard to * just print the ring buffer heads, even *iff* the memory were visible * in gdb. but then, that's also ok, really. * g) well, you cannot specify a timeout when waiting for events. no, * seriously, the interface doesn't support a timeout. never seen _that_ * before. sure, you can use a timerfd, but that's another syscall * you could have avoided. overall, this bizarre omission smells * like a µ-optimisation by the io_uring author for his personal * applications, to the detriment of everybody else who just wants * an event loop. but, umm, ok, if that's all, it could be worse. * (from what I gather from the author Jens Axboe, it simply didn't * occur to him, and he made good on it by adding an unlimited nuber * of timeouts later :). * h) initially there was a hardcoded limit of 4096 outstanding events. * later versions not only bump this to 32k, but also can handle * an unlimited amount of events, so this only affects the batch size. * i) unlike linux aio, you *can* register more then the limit * of fd events. while early verisons of io_uring signalled an overflow * and you ended up getting wet. 5.5+ does not do this anymore. * j) but, oh my! it had exactly the same bugs as the linux aio backend, * where some undocumented poll combinations just fail. fortunately, * after finally reaching the author, he was more than willing to fix * this probably in 5.6+. * k) overall, the *API* itself is, I dare to say, not a total trainwreck. * once the bugs ae fixed (probably in 5.6+), it will be without * competition. */ /* TODO: use internal TIMEOUT */ /* TODO: take advantage of single mmap, NODROP etc. */ /* TODO: resize cq/sq size independently */ #include #include #include #include #define IOURING_INIT_ENTRIES 32 /*****************************************************************************/ /* syscall wrapdadoop - this section has the raw api/abi definitions */ #include #include /* mostly directly taken from the kernel or documentation */ struct io_uring_sqe { __u8 opcode; __u8 flags; __u16 ioprio; __s32 fd; union { __u64 off; __u64 addr2; }; __u64 addr; __u32 len; union { __kernel_rwf_t rw_flags; __u32 fsync_flags; __u16 poll_events; __u32 sync_range_flags; __u32 msg_flags; __u32 timeout_flags; __u32 accept_flags; __u32 cancel_flags; __u32 open_flags; __u32 statx_flags; }; __u64 user_data; union { __u16 buf_index; __u64 __pad2[3]; }; }; struct io_uring_cqe { __u64 user_data; __s32 res; __u32 flags; }; struct io_sqring_offsets { __u32 head; __u32 tail; __u32 ring_mask; __u32 ring_entries; __u32 flags; __u32 dropped; __u32 array; __u32 resv1; __u64 resv2; }; struct io_cqring_offsets { __u32 head; __u32 tail; __u32 ring_mask; __u32 ring_entries; __u32 overflow; __u32 cqes; __u64 resv[2]; }; struct io_uring_params { __u32 sq_entries; __u32 cq_entries; __u32 flags; __u32 sq_thread_cpu; __u32 sq_thread_idle; __u32 features; __u32 resv[4]; struct io_sqring_offsets sq_off; struct io_cqring_offsets cq_off; }; #define IORING_SETUP_CQSIZE 0x00000008 #define IORING_OP_POLL_ADD 6 #define IORING_OP_POLL_REMOVE 7 #define IORING_OP_TIMEOUT 11 #define IORING_OP_TIMEOUT_REMOVE 12 /* relative or absolute, reference clock is CLOCK_MONOTONIC */ struct iouring_kernel_timespec { int64_t tv_sec; long long tv_nsec; }; #define IORING_TIMEOUT_ABS 0x00000001 #define IORING_ENTER_GETEVENTS 0x01 #define IORING_OFF_SQ_RING 0x00000000ULL #define IORING_OFF_CQ_RING 0x08000000ULL #define IORING_OFF_SQES 0x10000000ULL #define IORING_FEAT_SINGLE_MMAP 0x00000001 #define IORING_FEAT_NODROP 0x00000002 #define IORING_FEAT_SUBMIT_STABLE 0x00000004 inline_size int evsys_io_uring_setup (unsigned entries, struct io_uring_params *params) { return ev_syscall2 (SYS_io_uring_setup, entries, params); } inline_size int evsys_io_uring_enter (int fd, unsigned to_submit, unsigned min_complete, unsigned flags, const sigset_t *sig, size_t sigsz) { return ev_syscall6 (SYS_io_uring_enter, fd, to_submit, min_complete, flags, sig, sigsz); } /*****************************************************************************/ /* actual backed implementation */ /* we hope that volatile will make the compiler access this variables only once */ #define EV_SQ_VAR(name) *(volatile unsigned *)((char *)iouring_sq_ring + iouring_sq_ ## name) #define EV_CQ_VAR(name) *(volatile unsigned *)((char *)iouring_cq_ring + iouring_cq_ ## name) /* the index array */ #define EV_SQ_ARRAY ((unsigned *)((char *)iouring_sq_ring + iouring_sq_array)) /* the submit/completion queue entries */ #define EV_SQES ((struct io_uring_sqe *) iouring_sqes) #define EV_CQES ((struct io_uring_cqe *)((char *)iouring_cq_ring + iouring_cq_cqes)) inline_speed int iouring_enter (EV_P_ ev_tstamp timeout) { int res; EV_RELEASE_CB; res = evsys_io_uring_enter (iouring_fd, iouring_to_submit, 1, timeout > EV_TS_CONST (0.) ? IORING_ENTER_GETEVENTS : 0, 0, 0); assert (("libev: io_uring_enter did not consume all sqes", (res < 0 || res == iouring_to_submit))); iouring_to_submit = 0; EV_ACQUIRE_CB; return res; } /* TODO: can we move things around so we don't need this forward-reference? */ static void iouring_poll (EV_P_ ev_tstamp timeout); static struct io_uring_sqe * iouring_sqe_get (EV_P) { unsigned tail; for (;;) { tail = EV_SQ_VAR (tail); if (ecb_expect_true (tail + 1 - EV_SQ_VAR (head) <= EV_SQ_VAR (ring_entries))) break; /* whats the problem, we have free sqes */ /* queue full, need to flush and possibly handle some events */ #if EV_FEATURE_CODE /* first we ask the kernel nicely, most often this frees up some sqes */ int res = iouring_enter (EV_A_ EV_TS_CONST (0.)); ECB_MEMORY_FENCE_ACQUIRE; /* better safe than sorry */ if (res >= 0) continue; /* yes, it worked, try again */ #endif /* some problem, possibly EBUSY - do the full poll and let it handle any issues */ iouring_poll (EV_A_ EV_TS_CONST (0.)); /* iouring_poll should have done ECB_MEMORY_FENCE_ACQUIRE for us */ } /*assert (("libev: io_uring queue full after flush", tail + 1 - EV_SQ_VAR (head) <= EV_SQ_VAR (ring_entries)));*/ return EV_SQES + (tail & EV_SQ_VAR (ring_mask)); } inline_size struct io_uring_sqe * iouring_sqe_submit (EV_P_ struct io_uring_sqe *sqe) { unsigned idx = sqe - EV_SQES; EV_SQ_ARRAY [idx] = idx; ECB_MEMORY_FENCE_RELEASE; ++EV_SQ_VAR (tail); /*ECB_MEMORY_FENCE_RELEASE; /* for the time being we assume this is not needed */ ++iouring_to_submit; } /*****************************************************************************/ /* when the timerfd expires we simply note the fact, * as the purpose of the timerfd is to wake us up, nothing else. * the next iteration should re-set it. */ static void iouring_tfd_cb (EV_P_ struct ev_io *w, int revents) { iouring_tfd_to = EV_TSTAMP_HUGE; } /* called for full and partial cleanup */ ecb_cold static int iouring_internal_destroy (EV_P) { close (iouring_tfd); close (iouring_fd); if (iouring_sq_ring != MAP_FAILED) munmap (iouring_sq_ring, iouring_sq_ring_size); if (iouring_cq_ring != MAP_FAILED) munmap (iouring_cq_ring, iouring_cq_ring_size); if (iouring_sqes != MAP_FAILED) munmap (iouring_sqes , iouring_sqes_size ); if (ev_is_active (&iouring_tfd_w)) { ev_ref (EV_A); ev_io_stop (EV_A_ &iouring_tfd_w); } } ecb_cold static int iouring_internal_init (EV_P) { struct io_uring_params params = { 0 }; iouring_to_submit = 0; iouring_tfd = -1; iouring_sq_ring = MAP_FAILED; iouring_cq_ring = MAP_FAILED; iouring_sqes = MAP_FAILED; if (!have_monotonic) /* cannot really happen, but what if11 */ return -1; for (;;) { iouring_fd = evsys_io_uring_setup (iouring_entries, ¶ms); if (iouring_fd >= 0) break; /* yippie */ if (errno != EINVAL) return -1; /* we failed */ #if TODO if ((~params.features) & (IORING_FEAT_NODROP | IORING_FEATURE_SINGLE_MMAP | IORING_FEAT_SUBMIT_STABLE)) return -1; /* we require the above features */ #endif /* EINVAL: lots of possible reasons, but maybe * it is because we hit the unqueryable hardcoded size limit */ /* we hit the limit already, give up */ if (iouring_max_entries) return -1; /* first time we hit EINVAL? assume we hit the limit, so go back and retry */ iouring_entries >>= 1; iouring_max_entries = iouring_entries; } iouring_sq_ring_size = params.sq_off.array + params.sq_entries * sizeof (unsigned); iouring_cq_ring_size = params.cq_off.cqes + params.cq_entries * sizeof (struct io_uring_cqe); iouring_sqes_size = params.sq_entries * sizeof (struct io_uring_sqe); iouring_sq_ring = mmap (0, iouring_sq_ring_size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, iouring_fd, IORING_OFF_SQ_RING); iouring_cq_ring = mmap (0, iouring_cq_ring_size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, iouring_fd, IORING_OFF_CQ_RING); iouring_sqes = mmap (0, iouring_sqes_size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, iouring_fd, IORING_OFF_SQES); if (iouring_sq_ring == MAP_FAILED || iouring_cq_ring == MAP_FAILED || iouring_sqes == MAP_FAILED) return -1; iouring_sq_head = params.sq_off.head; iouring_sq_tail = params.sq_off.tail; iouring_sq_ring_mask = params.sq_off.ring_mask; iouring_sq_ring_entries = params.sq_off.ring_entries; iouring_sq_flags = params.sq_off.flags; iouring_sq_dropped = params.sq_off.dropped; iouring_sq_array = params.sq_off.array; iouring_cq_head = params.cq_off.head; iouring_cq_tail = params.cq_off.tail; iouring_cq_ring_mask = params.cq_off.ring_mask; iouring_cq_ring_entries = params.cq_off.ring_entries; iouring_cq_overflow = params.cq_off.overflow; iouring_cq_cqes = params.cq_off.cqes; iouring_tfd = timerfd_create (CLOCK_MONOTONIC, TFD_CLOEXEC); if (iouring_tfd < 0) return iouring_tfd; iouring_tfd_to = EV_TSTAMP_HUGE; return 0; } ecb_cold static void iouring_fork (EV_P) { iouring_internal_destroy (EV_A); while (iouring_internal_init (EV_A) < 0) ev_syserr ("(libev) io_uring_setup"); fd_rearm_all (EV_A); ev_io_stop (EV_A_ &iouring_tfd_w); ev_io_set (EV_A_ &iouring_tfd_w, iouring_tfd, EV_READ); ev_io_start (EV_A_ &iouring_tfd_w); } /*****************************************************************************/ static void iouring_modify (EV_P_ int fd, int oev, int nev) { if (oev) { /* we assume the sqe's are all "properly" initialised */ struct io_uring_sqe *sqe = iouring_sqe_get (EV_A); sqe->opcode = IORING_OP_POLL_REMOVE; sqe->fd = fd; /* Jens Axboe notified me that user_data is not what is documented, but is * some kind of unique ID that has to match, otherwise the request cannot * be removed. Since we don't *really* have that, we pass in the old * generation counter - if that fails, too bad, it will hopefully be removed * at close time and then be ignored. */ sqe->addr = (uint32_t)fd | ((__u64)(uint32_t)anfds [fd].egen << 32); sqe->user_data = (uint64_t)-1; iouring_sqe_submit (EV_A_ sqe); /* increment generation counter to avoid handling old events */ ++anfds [fd].egen; } if (nev) { struct io_uring_sqe *sqe = iouring_sqe_get (EV_A); sqe->opcode = IORING_OP_POLL_ADD; sqe->fd = fd; sqe->addr = 0; sqe->user_data = (uint32_t)fd | ((__u64)(uint32_t)anfds [fd].egen << 32); sqe->poll_events = (nev & EV_READ ? POLLIN : 0) | (nev & EV_WRITE ? POLLOUT : 0); iouring_sqe_submit (EV_A_ sqe); } } inline_size void iouring_tfd_update (EV_P_ ev_tstamp timeout) { ev_tstamp tfd_to = mn_now + timeout; /* we assume there will be many iterations per timer change, so * we only re-set the timerfd when we have to because its expiry * is too late. */ if (ecb_expect_false (tfd_to < iouring_tfd_to)) { struct itimerspec its; iouring_tfd_to = tfd_to; EV_TS_SET (its.it_interval, 0.); EV_TS_SET (its.it_value, tfd_to); if (timerfd_settime (iouring_tfd, TFD_TIMER_ABSTIME, &its, 0) < 0) assert (("libev: iouring timerfd_settime failed", 0)); } } inline_size void iouring_process_cqe (EV_P_ struct io_uring_cqe *cqe) { int fd = cqe->user_data & 0xffffffffU; uint32_t gen = cqe->user_data >> 32; int res = cqe->res; /* user_data -1 is a remove that we are not atm. interested in */ if (cqe->user_data == (uint64_t)-1) return; assert (("libev: io_uring fd must be in-bounds", fd >= 0 && fd < anfdmax)); /* documentation lies, of course. the result value is NOT like * normal syscalls, but like linux raw syscalls, i.e. negative * error numbers. fortunate, as otherwise there would be no way * to get error codes at all. still, why not document this? */ /* ignore event if generation doesn't match */ /* other than skipping removal events, */ /* this should actually be very rare */ if (ecb_expect_false (gen != (uint32_t)anfds [fd].egen)) return; if (ecb_expect_false (res < 0)) { /*TODO: EINVAL handling (was something failed with this fd)*/ if (res == -EBADF) { assert (("libev: event loop rejected bad fd", res != -EBADF)); fd_kill (EV_A_ fd); } else { errno = -res; ev_syserr ("(libev) IORING_OP_POLL_ADD"); } return; } /* feed events, we do not expect or handle POLLNVAL */ fd_event ( EV_A_ fd, (res & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) | (res & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) ); /* io_uring is oneshot, so we need to re-arm the fd next iteration */ /* this also means we usually have to do at least one syscall per iteration */ anfds [fd].events = 0; fd_change (EV_A_ fd, EV_ANFD_REIFY); } /* called when the event queue overflows */ ecb_cold static void iouring_overflow (EV_P) { /* we have two options, resize the queue (by tearing down * everything and recreating it, or living with it * and polling. * we implement this by resizing the queue, and, if that fails, * we just recreate the state on every failure, which * kind of is a very inefficient poll. * one danger is, due to the bios toward lower fds, * we will only really get events for those, so * maybe we need a poll() fallback, after all. */ /*EV_CQ_VAR (overflow) = 0;*/ /* need to do this if we keep the state and poll manually */ fd_rearm_all (EV_A); /* we double the size until we hit the hard-to-probe maximum */ if (!iouring_max_entries) { iouring_entries <<= 1; iouring_fork (EV_A); } else { /* we hit the kernel limit, we should fall back to something else. * we can either poll() a few times and hope for the best, * poll always, or switch to epoll. * TODO: is this necessary with newer kernels? */ iouring_internal_destroy (EV_A); /* this should make it so that on return, we don't call any uring functions */ iouring_to_submit = 0; for (;;) { backend = epoll_init (EV_A_ 0); if (backend) break; ev_syserr ("(libev) iouring switch to epoll"); } } } /* handle any events in the completion queue, return true if there were any */ static int iouring_handle_cq (EV_P) { unsigned head, tail, mask; head = EV_CQ_VAR (head); ECB_MEMORY_FENCE_ACQUIRE; tail = EV_CQ_VAR (tail); if (head == tail) return 0; /* it can only overflow if we have events, yes, yes? */ if (ecb_expect_false (EV_CQ_VAR (overflow))) { iouring_overflow (EV_A); return 1; } mask = EV_CQ_VAR (ring_mask); do iouring_process_cqe (EV_A_ &EV_CQES [head++ & mask]); while (head != tail); EV_CQ_VAR (head) = head; ECB_MEMORY_FENCE_RELEASE; return 1; } static void iouring_poll (EV_P_ ev_tstamp timeout) { /* if we have events, no need for extra syscalls, but we might have to queue events */ /* we also clar the timeout if there are outstanding fdchanges */ /* the latter should only happen if both the sq and cq are full, most likely */ /* because we have a lot of event sources that immediately complete */ /* TODO: fdchacngecnt is always 0 because fd_reify does not have two buffers yet */ if (iouring_handle_cq (EV_A) || fdchangecnt) timeout = EV_TS_CONST (0.); else /* no events, so maybe wait for some */ iouring_tfd_update (EV_A_ timeout); /* only enter the kernel if we have something to submit, or we need to wait */ if (timeout || iouring_to_submit) { int res = iouring_enter (EV_A_ timeout); if (ecb_expect_false (res < 0)) if (errno == EINTR) /* ignore */; else if (errno == EBUSY) /* cq full, cannot submit - should be rare because we flush the cq first, so simply ignore */; else ev_syserr ("(libev) iouring setup"); else iouring_handle_cq (EV_A); } } inline_size int iouring_init (EV_P_ int flags) { iouring_entries = IOURING_INIT_ENTRIES; iouring_max_entries = 0; if (iouring_internal_init (EV_A) < 0) { iouring_internal_destroy (EV_A); return 0; } ev_io_init (&iouring_tfd_w, iouring_tfd_cb, iouring_tfd, EV_READ); ev_set_priority (&iouring_tfd_w, EV_MINPRI); ev_io_start (EV_A_ &iouring_tfd_w); ev_unref (EV_A); /* watcher should not keep loop alive */ backend_modify = iouring_modify; backend_poll = iouring_poll; return EVBACKEND_IOURING; } inline_size void iouring_destroy (EV_P) { iouring_internal_destroy (EV_A); } libev-4.33/ev_win32.c0000644000000000000000000001234213565045616011250 00000000000000/* * libev win32 compatibility cruft (_not_ a backend) * * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, the contents of this file may be used under the terms of * the GNU General Public License ("GPL") version 2 or any later version, * in which case the provisions of the GPL are applicable instead of * the above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the BSD license, indicate your decision * by deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file under * either the BSD or the GPL. */ #ifdef _WIN32 /* note: the comment below could not be substantiated, but what would I care */ /* MSDN says this is required to handle SIGFPE */ /* my wild guess would be that using something floating-pointy is required */ /* for the crt to do something about it */ volatile double SIGFPE_REQ = 0.0f; static SOCKET ev_tcp_socket (void) { #if EV_USE_WSASOCKET return WSASocket (AF_INET, SOCK_STREAM, 0, 0, 0, 0); #else return socket (AF_INET, SOCK_STREAM, 0); #endif } /* oh, the humanity! */ static int ev_pipe (int filedes [2]) { struct sockaddr_in addr = { 0 }; int addr_size = sizeof (addr); struct sockaddr_in adr2; int adr2_size = sizeof (adr2); SOCKET listener; SOCKET sock [2] = { -1, -1 }; if ((listener = ev_tcp_socket ()) == INVALID_SOCKET) return -1; addr.sin_family = AF_INET; addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK); addr.sin_port = 0; if (bind (listener, (struct sockaddr *)&addr, addr_size)) goto fail; if (getsockname (listener, (struct sockaddr *)&addr, &addr_size)) goto fail; if (listen (listener, 1)) goto fail; if ((sock [0] = ev_tcp_socket ()) == INVALID_SOCKET) goto fail; if (connect (sock [0], (struct sockaddr *)&addr, addr_size)) goto fail; /* TODO: returns INVALID_SOCKET on winsock accept, not < 0. fix it */ /* when convenient, probably by just removing error checking altogether? */ if ((sock [1] = accept (listener, 0, 0)) < 0) goto fail; /* windows vista returns fantasy port numbers for sockets: * example for two interconnected tcp sockets: * * (Socket::unpack_sockaddr_in getsockname $sock0)[0] == 53364 * (Socket::unpack_sockaddr_in getpeername $sock0)[0] == 53363 * (Socket::unpack_sockaddr_in getsockname $sock1)[0] == 53363 * (Socket::unpack_sockaddr_in getpeername $sock1)[0] == 53365 * * wow! tridirectional sockets! * * this way of checking ports seems to work: */ if (getpeername (sock [0], (struct sockaddr *)&addr, &addr_size)) goto fail; if (getsockname (sock [1], (struct sockaddr *)&adr2, &adr2_size)) goto fail; errno = WSAEINVAL; if (addr_size != adr2_size || addr.sin_addr.s_addr != adr2.sin_addr.s_addr /* just to be sure, I mean, it's windows */ || addr.sin_port != adr2.sin_port) goto fail; closesocket (listener); #if EV_SELECT_IS_WINSOCKET filedes [0] = EV_WIN32_HANDLE_TO_FD (sock [0]); filedes [1] = EV_WIN32_HANDLE_TO_FD (sock [1]); #else /* when select isn't winsocket, we also expect socket, connect, accept etc. * to work on fds */ filedes [0] = sock [0]; filedes [1] = sock [1]; #endif return 0; fail: closesocket (listener); if (sock [0] != INVALID_SOCKET) closesocket (sock [0]); if (sock [1] != INVALID_SOCKET) closesocket (sock [1]); return -1; } #undef pipe #define pipe(filedes) ev_pipe (filedes) #define EV_HAVE_EV_TIME 1 ev_tstamp ev_time (void) { FILETIME ft; ULARGE_INTEGER ui; GetSystemTimeAsFileTime (&ft); ui.u.LowPart = ft.dwLowDateTime; ui.u.HighPart = ft.dwHighDateTime; /* also, msvc cannot convert ulonglong to double... yes, it is that sucky */ return EV_TS_FROM_USEC (((LONGLONG)(ui.QuadPart - 116444736000000000) * 1e-1)); } #endif libev-4.33/ev.30000644000000000000000000102541313632410112010130 00000000000000.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" libev \- a high performance full\-featured event loop written in C .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include .Ve .SS "\s-1EXAMPLE PROGRAM\s0" .IX Subsection "EXAMPLE PROGRAM" .Vb 2 \& // a single header file is required \& #include \& \& #include // for puts \& \& // every watcher type has its own typedef\*(Aqd struct \& // with the name ev_TYPE \& ev_io stdin_watcher; \& ev_timer timeout_watcher; \& \& // all watcher callbacks have a similar signature \& // this callback is called when data is readable on stdin \& static void \& stdin_cb (EV_P_ ev_io *w, int revents) \& { \& puts ("stdin ready"); \& // for one\-shot events, one must manually stop the watcher \& // with its corresponding stop function. \& ev_io_stop (EV_A_ w); \& \& // this causes all nested ev_run\*(Aqs to stop iterating \& ev_break (EV_A_ EVBREAK_ALL); \& } \& \& // another callback, this time for a time\-out \& static void \& timeout_cb (EV_P_ ev_timer *w, int revents) \& { \& puts ("timeout"); \& // this causes the innermost ev_run to stop iterating \& ev_break (EV_A_ EVBREAK_ONE); \& } \& \& int \& main (void) \& { \& // use the default event loop unless you have special needs \& struct ev_loop *loop = EV_DEFAULT; \& \& // initialise an io watcher, then start it \& // this one will watch for stdin to become readable \& ev_io_init (&stdin_watcher, stdin_cb, /*STDIN_FILENO*/ 0, EV_READ); \& ev_io_start (loop, &stdin_watcher); \& \& // initialise a timer watcher, then start it \& // simple non\-repeating 5.5 second timeout \& ev_timer_init (&timeout_watcher, timeout_cb, 5.5, 0.); \& ev_timer_start (loop, &timeout_watcher); \& \& // now wait for events to arrive \& ev_run (loop, 0); \& \& // break was called, so exit \& return 0; \& } .Ve .SH "ABOUT THIS DOCUMENT" .IX Header "ABOUT THIS DOCUMENT" This document documents the libev software package. .PP The newest version of this document is also available as an html-formatted web page you might find easier to navigate when reading it for the first time: . .PP While this document tries to be as complete as possible in documenting libev, its usage and the rationale behind its design, it is not a tutorial on event-based programming, nor will it introduce event-based programming with libev. .PP Familiarity with event based programming techniques in general is assumed throughout this document. .SH "WHAT TO READ WHEN IN A HURRY" .IX Header "WHAT TO READ WHEN IN A HURRY" This manual tries to be very detailed, but unfortunately, this also makes it very long. If you just want to know the basics of libev, I suggest reading \*(L"\s-1ANATOMY OF A WATCHER\*(R"\s0, then the \*(L"\s-1EXAMPLE PROGRAM\*(R"\s0 above and look up the missing functions in \*(L"\s-1GLOBAL FUNCTIONS\*(R"\s0 and the \f(CW\*(C`ev_io\*(C'\fR and \&\f(CW\*(C`ev_timer\*(C'\fR sections in \*(L"\s-1WATCHER TYPES\*(R"\s0. .SH "ABOUT LIBEV" .IX Header "ABOUT LIBEV" Libev is an event loop: you register interest in certain events (such as a file descriptor being readable or a timeout occurring), and it will manage these event sources and provide your program with events. .PP To do this, it must take more or less complete control over your process (or thread) by executing the \fIevent loop\fR handler, and will then communicate events via a callback mechanism. .PP You register interest in certain events by registering so-called \fIevent watchers\fR, which are relatively small C structures you initialise with the details of the event, and then hand it over to libev by \fIstarting\fR the watcher. .SS "\s-1FEATURES\s0" .IX Subsection "FEATURES" Libev supports \f(CW\*(C`select\*(C'\fR, \f(CW\*(C`poll\*(C'\fR, the Linux-specific aio and \f(CW\*(C`epoll\*(C'\fR interfaces, the BSD-specific \f(CW\*(C`kqueue\*(C'\fR and the Solaris-specific event port mechanisms for file descriptor events (\f(CW\*(C`ev_io\*(C'\fR), the Linux \f(CW\*(C`inotify\*(C'\fR interface (for \f(CW\*(C`ev_stat\*(C'\fR), Linux eventfd/signalfd (for faster and cleaner inter-thread wakeup (\f(CW\*(C`ev_async\*(C'\fR)/signal handling (\f(CW\*(C`ev_signal\*(C'\fR)) relative timers (\f(CW\*(C`ev_timer\*(C'\fR), absolute timers with customised rescheduling (\f(CW\*(C`ev_periodic\*(C'\fR), synchronous signals (\f(CW\*(C`ev_signal\*(C'\fR), process status change events (\f(CW\*(C`ev_child\*(C'\fR), and event watchers dealing with the event loop mechanism itself (\f(CW\*(C`ev_idle\*(C'\fR, \f(CW\*(C`ev_embed\*(C'\fR, \f(CW\*(C`ev_prepare\*(C'\fR and \&\f(CW\*(C`ev_check\*(C'\fR watchers) as well as file watchers (\f(CW\*(C`ev_stat\*(C'\fR) and even limited support for fork events (\f(CW\*(C`ev_fork\*(C'\fR). .PP It also is quite fast (see this benchmark comparing it to libevent for example). .SS "\s-1CONVENTIONS\s0" .IX Subsection "CONVENTIONS" Libev is very configurable. In this manual the default (and most common) configuration will be described, which supports multiple event loops. For more info about various configuration options please have a look at \&\fB\s-1EMBED\s0\fR section in this manual. If libev was configured without support for multiple event loops, then all functions taking an initial argument of name \f(CW\*(C`loop\*(C'\fR (which is always of type \f(CW\*(C`struct ev_loop *\*(C'\fR) will not have this argument. .SS "\s-1TIME REPRESENTATION\s0" .IX Subsection "TIME REPRESENTATION" Libev represents time as a single floating point number, representing the (fractional) number of seconds since the (\s-1POSIX\s0) epoch (in practice somewhere near the beginning of 1970, details are complicated, don't ask). This type is called \f(CW\*(C`ev_tstamp\*(C'\fR, which is what you should use too. It usually aliases to the \f(CW\*(C`double\*(C'\fR type in C. When you need to do any calculations on it, you should treat it as some floating point value. .PP Unlike the name component \f(CW\*(C`stamp\*(C'\fR might indicate, it is also used for time differences (e.g. delays) throughout libev. .SH "ERROR HANDLING" .IX Header "ERROR HANDLING" Libev knows three classes of errors: operating system errors, usage errors and internal errors (bugs). .PP When libev catches an operating system error it cannot handle (for example a system call indicating a condition libev cannot fix), it calls the callback set via \f(CW\*(C`ev_set_syserr_cb\*(C'\fR, which is supposed to fix the problem or abort. The default is to print a diagnostic message and to call \f(CW\*(C`abort ()\*(C'\fR. .PP When libev detects a usage error such as a negative timer interval, then it will print a diagnostic message and abort (via the \f(CW\*(C`assert\*(C'\fR mechanism, so \f(CW\*(C`NDEBUG\*(C'\fR will disable this checking): these are programming errors in the libev caller and need to be fixed there. .PP Via the \f(CW\*(C`EV_FREQUENT\*(C'\fR macro you can compile in and/or enable extensive consistency checking code inside libev that can be used to check for internal inconsistencies, suually caused by application bugs. .PP Libev also has a few internal error-checking \f(CW\*(C`assert\*(C'\fRions. These do not trigger under normal circumstances, as they indicate either a bug in libev or worse. .SH "GLOBAL FUNCTIONS" .IX Header "GLOBAL FUNCTIONS" These functions can be called anytime, even before initialising the library in any way. .IP "ev_tstamp ev_time ()" 4 .IX Item "ev_tstamp ev_time ()" Returns the current time as libev would use it. Please note that the \&\f(CW\*(C`ev_now\*(C'\fR function is usually faster and also often returns the timestamp you actually want to know. Also interesting is the combination of \&\f(CW\*(C`ev_now_update\*(C'\fR and \f(CW\*(C`ev_now\*(C'\fR. .IP "ev_sleep (ev_tstamp interval)" 4 .IX Item "ev_sleep (ev_tstamp interval)" Sleep for the given interval: The current thread will be blocked until either it is interrupted or the given time interval has passed (approximately \- it might return a bit earlier even if not interrupted). Returns immediately if \f(CW\*(C`interval <= 0\*(C'\fR. .Sp Basically this is a sub-second-resolution \f(CW\*(C`sleep ()\*(C'\fR. .Sp The range of the \f(CW\*(C`interval\*(C'\fR is limited \- libev only guarantees to work with sleep times of up to one day (\f(CW\*(C`interval <= 86400\*(C'\fR). .IP "int ev_version_major ()" 4 .IX Item "int ev_version_major ()" .PD 0 .IP "int ev_version_minor ()" 4 .IX Item "int ev_version_minor ()" .PD You can find out the major and minor \s-1ABI\s0 version numbers of the library you linked against by calling the functions \f(CW\*(C`ev_version_major\*(C'\fR and \&\f(CW\*(C`ev_version_minor\*(C'\fR. If you want, you can compare against the global symbols \f(CW\*(C`EV_VERSION_MAJOR\*(C'\fR and \f(CW\*(C`EV_VERSION_MINOR\*(C'\fR, which specify the version of the library your program was compiled against. .Sp These version numbers refer to the \s-1ABI\s0 version of the library, not the release version. .Sp Usually, it's a good idea to terminate if the major versions mismatch, as this indicates an incompatible change. Minor versions are usually compatible to older versions, so a larger minor version alone is usually not a problem. .Sp Example: Make sure we haven't accidentally been linked against the wrong version (note, however, that this will not detect other \s-1ABI\s0 mismatches, such as \s-1LFS\s0 or reentrancy). .Sp .Vb 3 \& assert (("libev version mismatch", \& ev_version_major () == EV_VERSION_MAJOR \& && ev_version_minor () >= EV_VERSION_MINOR)); .Ve .IP "unsigned int ev_supported_backends ()" 4 .IX Item "unsigned int ev_supported_backends ()" Return the set of all backends (i.e. their corresponding \f(CW\*(C`EV_BACKEND_*\*(C'\fR value) compiled into this binary of libev (independent of their availability on the system you are running on). See \f(CW\*(C`ev_default_loop\*(C'\fR for a description of the set values. .Sp Example: make sure we have the epoll method, because yeah this is cool and a must have and can we have a torrent of it please!!!11 .Sp .Vb 2 \& assert (("sorry, no epoll, no sex", \& ev_supported_backends () & EVBACKEND_EPOLL)); .Ve .IP "unsigned int ev_recommended_backends ()" 4 .IX Item "unsigned int ev_recommended_backends ()" Return the set of all backends compiled into this binary of libev and also recommended for this platform, meaning it will work for most file descriptor types. This set is often smaller than the one returned by \&\f(CW\*(C`ev_supported_backends\*(C'\fR, as for example kqueue is broken on most BSDs and will not be auto-detected unless you explicitly request it (assuming you know what you are doing). This is the set of backends that libev will probe for if you specify no backends explicitly. .IP "unsigned int ev_embeddable_backends ()" 4 .IX Item "unsigned int ev_embeddable_backends ()" Returns the set of backends that are embeddable in other event loops. This value is platform-specific but can include backends not available on the current system. To find which embeddable backends might be supported on the current system, you would need to look at \f(CW\*(C`ev_embeddable_backends () & ev_supported_backends ()\*(C'\fR, likewise for recommended ones. .Sp See the description of \f(CW\*(C`ev_embed\*(C'\fR watchers for more info. .IP "ev_set_allocator (void *(*cb)(void *ptr, long size) throw ())" 4 .IX Item "ev_set_allocator (void *(*cb)(void *ptr, long size) throw ())" Sets the allocation function to use (the prototype is similar \- the semantics are identical to the \f(CW\*(C`realloc\*(C'\fR C89/SuS/POSIX function). It is used to allocate and free memory (no surprises here). If it returns zero when memory needs to be allocated (\f(CW\*(C`size != 0\*(C'\fR), the library might abort or take some potentially destructive action. .Sp Since some systems (at least OpenBSD and Darwin) fail to implement correct \f(CW\*(C`realloc\*(C'\fR semantics, libev will use a wrapper around the system \&\f(CW\*(C`realloc\*(C'\fR and \f(CW\*(C`free\*(C'\fR functions by default. .Sp You could override this function in high-availability programs to, say, free some memory if it cannot allocate memory, to use a special allocator, or even to sleep a while and retry until some memory is available. .Sp Example: The following is the \f(CW\*(C`realloc\*(C'\fR function that libev itself uses which should work with \f(CW\*(C`realloc\*(C'\fR and \f(CW\*(C`free\*(C'\fR functions of all kinds and is probably a good basis for your own implementation. .Sp .Vb 5 \& static void * \& ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT \& { \& if (size) \& return realloc (ptr, size); \& \& free (ptr); \& return 0; \& } .Ve .Sp Example: Replace the libev allocator with one that waits a bit and then retries. .Sp .Vb 8 \& static void * \& persistent_realloc (void *ptr, size_t size) \& { \& if (!size) \& { \& free (ptr); \& return 0; \& } \& \& for (;;) \& { \& void *newptr = realloc (ptr, size); \& \& if (newptr) \& return newptr; \& \& sleep (60); \& } \& } \& \& ... \& ev_set_allocator (persistent_realloc); .Ve .IP "ev_set_syserr_cb (void (*cb)(const char *msg) throw ())" 4 .IX Item "ev_set_syserr_cb (void (*cb)(const char *msg) throw ())" Set the callback function to call on a retryable system call error (such as failed select, poll, epoll_wait). The message is a printable string indicating the system call or subsystem causing the problem. If this callback is set, then libev will expect it to remedy the situation, no matter what, when it returns. That is, libev will generally retry the requested operation, or, if the condition doesn't go away, do bad stuff (such as abort). .Sp Example: This is basically the same thing that libev does internally, too. .Sp .Vb 6 \& static void \& fatal_error (const char *msg) \& { \& perror (msg); \& abort (); \& } \& \& ... \& ev_set_syserr_cb (fatal_error); .Ve .IP "ev_feed_signal (int signum)" 4 .IX Item "ev_feed_signal (int signum)" This function can be used to \*(L"simulate\*(R" a signal receive. It is completely safe to call this function at any time, from any context, including signal handlers or random threads. .Sp Its main use is to customise signal handling in your process, especially in the presence of threads. For example, you could block signals by default in all threads (and specifying \f(CW\*(C`EVFLAG_NOSIGMASK\*(C'\fR when creating any loops), and in one thread, use \f(CW\*(C`sigwait\*(C'\fR or any other mechanism to wait for signals, then \*(L"deliver\*(R" them to libev by calling \&\f(CW\*(C`ev_feed_signal\*(C'\fR. .SH "FUNCTIONS CONTROLLING EVENT LOOPS" .IX Header "FUNCTIONS CONTROLLING EVENT LOOPS" An event loop is described by a \f(CW\*(C`struct ev_loop *\*(C'\fR (the \f(CW\*(C`struct\*(C'\fR is \&\fInot\fR optional in this case unless libev 3 compatibility is disabled, as libev 3 had an \f(CW\*(C`ev_loop\*(C'\fR function colliding with the struct name). .PP The library knows two types of such loops, the \fIdefault\fR loop, which supports child process events, and dynamically created event loops which do not. .IP "struct ev_loop *ev_default_loop (unsigned int flags)" 4 .IX Item "struct ev_loop *ev_default_loop (unsigned int flags)" This returns the \*(L"default\*(R" event loop object, which is what you should normally use when you just need \*(L"the event loop\*(R". Event loop objects and the \f(CW\*(C`flags\*(C'\fR parameter are described in more detail in the entry for \&\f(CW\*(C`ev_loop_new\*(C'\fR. .Sp If the default loop is already initialised then this function simply returns it (and ignores the flags. If that is troubling you, check \&\f(CW\*(C`ev_backend ()\*(C'\fR afterwards). Otherwise it will create it with the given flags, which should almost always be \f(CW0\fR, unless the caller is also the one calling \f(CW\*(C`ev_run\*(C'\fR or otherwise qualifies as \*(L"the main program\*(R". .Sp If you don't know what event loop to use, use the one returned from this function (or via the \f(CW\*(C`EV_DEFAULT\*(C'\fR macro). .Sp Note that this function is \fInot\fR thread-safe, so if you want to use it from multiple threads, you have to employ some kind of mutex (note also that this case is unlikely, as loops cannot be shared easily between threads anyway). .Sp The default loop is the only loop that can handle \f(CW\*(C`ev_child\*(C'\fR watchers, and to do this, it always registers a handler for \f(CW\*(C`SIGCHLD\*(C'\fR. If this is a problem for your application you can either create a dynamic loop with \&\f(CW\*(C`ev_loop_new\*(C'\fR which doesn't do that, or you can simply overwrite the \&\f(CW\*(C`SIGCHLD\*(C'\fR signal handler \fIafter\fR calling \f(CW\*(C`ev_default_init\*(C'\fR. .Sp Example: This is the most typical usage. .Sp .Vb 2 \& if (!ev_default_loop (0)) \& fatal ("could not initialise libev, bad $LIBEV_FLAGS in environment?"); .Ve .Sp Example: Restrict libev to the select and poll backends, and do not allow environment settings to be taken into account: .Sp .Vb 1 \& ev_default_loop (EVBACKEND_POLL | EVBACKEND_SELECT | EVFLAG_NOENV); .Ve .IP "struct ev_loop *ev_loop_new (unsigned int flags)" 4 .IX Item "struct ev_loop *ev_loop_new (unsigned int flags)" This will create and initialise a new event loop object. If the loop could not be initialised, returns false. .Sp This function is thread-safe, and one common way to use libev with threads is indeed to create one loop per thread, and using the default loop in the \*(L"main\*(R" or \*(L"initial\*(R" thread. .Sp The flags argument can be used to specify special behaviour or specific backends to use, and is usually specified as \f(CW0\fR (or \f(CW\*(C`EVFLAG_AUTO\*(C'\fR). .Sp The following flags are supported: .RS 4 .ie n .IP """EVFLAG_AUTO""" 4 .el .IP "\f(CWEVFLAG_AUTO\fR" 4 .IX Item "EVFLAG_AUTO" The default flags value. Use this if you have no clue (it's the right thing, believe me). .ie n .IP """EVFLAG_NOENV""" 4 .el .IP "\f(CWEVFLAG_NOENV\fR" 4 .IX Item "EVFLAG_NOENV" If this flag bit is or'ed into the flag value (or the program runs setuid or setgid) then libev will \fInot\fR look at the environment variable \&\f(CW\*(C`LIBEV_FLAGS\*(C'\fR. Otherwise (the default), this environment variable will override the flags completely if it is found in the environment. This is useful to try out specific backends to test their performance, to work around bugs, or to make libev threadsafe (accessing environment variables cannot be done in a threadsafe way, but usually it works if no other thread modifies them). .ie n .IP """EVFLAG_FORKCHECK""" 4 .el .IP "\f(CWEVFLAG_FORKCHECK\fR" 4 .IX Item "EVFLAG_FORKCHECK" Instead of calling \f(CW\*(C`ev_loop_fork\*(C'\fR manually after a fork, you can also make libev check for a fork in each iteration by enabling this flag. .Sp This works by calling \f(CW\*(C`getpid ()\*(C'\fR on every iteration of the loop, and thus this might slow down your event loop if you do a lot of loop iterations and little real work, but is usually not noticeable (on my GNU/Linux system for example, \f(CW\*(C`getpid\*(C'\fR is actually a simple 5\-insn sequence without a system call and thus \fIvery\fR fast, but my GNU/Linux system also has \f(CW\*(C`pthread_atfork\*(C'\fR which is even faster). (Update: glibc versions 2.25 apparently removed the \f(CW\*(C`getpid\*(C'\fR optimisation again). .Sp The big advantage of this flag is that you can forget about fork (and forget about forgetting to tell libev about forking, although you still have to ignore \f(CW\*(C`SIGPIPE\*(C'\fR) when you use this flag. .Sp This flag setting cannot be overridden or specified in the \f(CW\*(C`LIBEV_FLAGS\*(C'\fR environment variable. .ie n .IP """EVFLAG_NOINOTIFY""" 4 .el .IP "\f(CWEVFLAG_NOINOTIFY\fR" 4 .IX Item "EVFLAG_NOINOTIFY" When this flag is specified, then libev will not attempt to use the \&\fIinotify\fR \s-1API\s0 for its \f(CW\*(C`ev_stat\*(C'\fR watchers. Apart from debugging and testing, this flag can be useful to conserve inotify file descriptors, as otherwise each loop using \f(CW\*(C`ev_stat\*(C'\fR watchers consumes one inotify handle. .ie n .IP """EVFLAG_SIGNALFD""" 4 .el .IP "\f(CWEVFLAG_SIGNALFD\fR" 4 .IX Item "EVFLAG_SIGNALFD" When this flag is specified, then libev will attempt to use the \&\fIsignalfd\fR \s-1API\s0 for its \f(CW\*(C`ev_signal\*(C'\fR (and \f(CW\*(C`ev_child\*(C'\fR) watchers. This \s-1API\s0 delivers signals synchronously, which makes it both faster and might make it possible to get the queued signal data. It can also simplify signal handling with threads, as long as you properly block signals in your threads that are not interested in handling them. .Sp Signalfd will not be used by default as this changes your signal mask, and there are a lot of shoddy libraries and programs (glib's threadpool for example) that can't properly initialise their signal masks. .ie n .IP """EVFLAG_NOSIGMASK""" 4 .el .IP "\f(CWEVFLAG_NOSIGMASK\fR" 4 .IX Item "EVFLAG_NOSIGMASK" When this flag is specified, then libev will avoid to modify the signal mask. Specifically, this means you have to make sure signals are unblocked when you want to receive them. .Sp This behaviour is useful when you want to do your own signal handling, or want to handle signals only in specific threads and want to avoid libev unblocking the signals. .Sp It's also required by \s-1POSIX\s0 in a threaded program, as libev calls \&\f(CW\*(C`sigprocmask\*(C'\fR, whose behaviour is officially unspecified. .ie n .IP """EVFLAG_NOTIMERFD""" 4 .el .IP "\f(CWEVFLAG_NOTIMERFD\fR" 4 .IX Item "EVFLAG_NOTIMERFD" When this flag is specified, the libev will avoid using a \f(CW\*(C`timerfd\*(C'\fR to detect time jumps. It will still be able to detect time jumps, but takes longer and has a lower accuracy in doing so, but saves a file descriptor per loop. .Sp The current implementation only tries to use a \f(CW\*(C`timerfd\*(C'\fR when the first \&\f(CW\*(C`ev_periodic\*(C'\fR watcher is started and falls back on other methods if it cannot be created, but this behaviour might change in the future. .ie n .IP """EVBACKEND_SELECT"" (value 1, portable select backend)" 4 .el .IP "\f(CWEVBACKEND_SELECT\fR (value 1, portable select backend)" 4 .IX Item "EVBACKEND_SELECT (value 1, portable select backend)" This is your standard \fBselect\fR\|(2) backend. Not \fIcompletely\fR standard, as libev tries to roll its own fd_set with no limits on the number of fds, but if that fails, expect a fairly low limit on the number of fds when using this backend. It doesn't scale too well (O(highest_fd)), but its usually the fastest backend for a low number of (low-numbered :) fds. .Sp To get good performance out of this backend you need a high amount of parallelism (most of the file descriptors should be busy). If you are writing a server, you should \f(CW\*(C`accept ()\*(C'\fR in a loop to accept as many connections as possible during one iteration. You might also want to have a look at \f(CW\*(C`ev_set_io_collect_interval ()\*(C'\fR to increase the amount of readiness notifications you get per iteration. .Sp This backend maps \f(CW\*(C`EV_READ\*(C'\fR to the \f(CW\*(C`readfds\*(C'\fR set and \f(CW\*(C`EV_WRITE\*(C'\fR to the \&\f(CW\*(C`writefds\*(C'\fR set (and to work around Microsoft Windows bugs, also onto the \&\f(CW\*(C`exceptfds\*(C'\fR set on that platform). .ie n .IP """EVBACKEND_POLL"" (value 2, poll backend, available everywhere except on windows)" 4 .el .IP "\f(CWEVBACKEND_POLL\fR (value 2, poll backend, available everywhere except on windows)" 4 .IX Item "EVBACKEND_POLL (value 2, poll backend, available everywhere except on windows)" And this is your standard \fBpoll\fR\|(2) backend. It's more complicated than select, but handles sparse fds better and has no artificial limit on the number of fds you can use (except it will slow down considerably with a lot of inactive fds). It scales similarly to select, i.e. O(total_fds). See the entry for \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR, above, for performance tips. .Sp This backend maps \f(CW\*(C`EV_READ\*(C'\fR to \f(CW\*(C`POLLIN | POLLERR | POLLHUP\*(C'\fR, and \&\f(CW\*(C`EV_WRITE\*(C'\fR to \f(CW\*(C`POLLOUT | POLLERR | POLLHUP\*(C'\fR. .ie n .IP """EVBACKEND_EPOLL"" (value 4, Linux)" 4 .el .IP "\f(CWEVBACKEND_EPOLL\fR (value 4, Linux)" 4 .IX Item "EVBACKEND_EPOLL (value 4, Linux)" Use the Linux-specific \fBepoll\fR\|(7) interface (for both pre\- and post\-2.6.9 kernels). .Sp For few fds, this backend is a bit little slower than poll and select, but it scales phenomenally better. While poll and select usually scale like O(total_fds) where total_fds is the total number of fds (or the highest fd), epoll scales either O(1) or O(active_fds). .Sp The epoll mechanism deserves honorable mention as the most misdesigned of the more advanced event mechanisms: mere annoyances include silently dropping file descriptors, requiring a system call per change per file descriptor (and unnecessary guessing of parameters), problems with dup, returning before the timeout value, resulting in additional iterations (and only giving 5ms accuracy while select on the same platform gives 0.1ms) and so on. The biggest issue is fork races, however \- if a program forks then \fIboth\fR parent and child process have to recreate the epoll set, which can take considerable time (one syscall per file descriptor) and is of course hard to detect. .Sp Epoll is also notoriously buggy \- embedding epoll fds \fIshould\fR work, but of course \fIdoesn't\fR, and epoll just loves to report events for totally \fIdifferent\fR file descriptors (even already closed ones, so one cannot even remove them from the set) than registered in the set (especially on \s-1SMP\s0 systems). Libev tries to counter these spurious notifications by employing an additional generation counter and comparing that against the events to filter out spurious ones, recreating the set when required. Epoll also erroneously rounds down timeouts, but gives you no way to know when and by how much, so sometimes you have to busy-wait because epoll returns immediately despite a nonzero timeout. And last not least, it also refuses to work with some file descriptors which work perfectly fine with \f(CW\*(C`select\*(C'\fR (files, many character devices...). .Sp Epoll is truly the train wreck among event poll mechanisms, a frankenpoll, cobbled together in a hurry, no thought to design or interaction with others. Oh, the pain, will it ever stop... .Sp While stopping, setting and starting an I/O watcher in the same iteration will result in some caching, there is still a system call per such incident (because the same \fIfile descriptor\fR could point to a different \&\fIfile description\fR now), so its best to avoid that. Also, \f(CW\*(C`dup ()\*(C'\fR'ed file descriptors might not work very well if you register events for both file descriptors. .Sp Best performance from this backend is achieved by not unregistering all watchers for a file descriptor until it has been closed, if possible, i.e. keep at least one watcher active per fd at all times. Stopping and starting a watcher (without re-setting it) also usually doesn't cause extra overhead. A fork can both result in spurious notifications as well as in libev having to destroy and recreate the epoll object, which can take considerable time and thus should be avoided. .Sp All this means that, in practice, \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR can be as fast or faster than epoll for maybe up to a hundred file descriptors, depending on the usage. So sad. .Sp While nominally embeddable in other event loops, this feature is broken in a lot of kernel revisions, but probably(!) works in current versions. .Sp This backend maps \f(CW\*(C`EV_READ\*(C'\fR and \f(CW\*(C`EV_WRITE\*(C'\fR in the same way as \&\f(CW\*(C`EVBACKEND_POLL\*(C'\fR. .ie n .IP """EVBACKEND_LINUXAIO"" (value 64, Linux)" 4 .el .IP "\f(CWEVBACKEND_LINUXAIO\fR (value 64, Linux)" 4 .IX Item "EVBACKEND_LINUXAIO (value 64, Linux)" Use the Linux-specific Linux \s-1AIO\s0 (\fInot\fR \f(CWaio(7)\fR but \f(CWio_submit(2)\fR) event interface available in post\-4.18 kernels (but libev only tries to use it in 4.19+). .Sp This is another Linux train wreck of an event interface. .Sp If this backend works for you (as of this writing, it was very experimental), it is the best event interface available on Linux and might be well worth enabling it \- if it isn't available in your kernel this will be detected and this backend will be skipped. .Sp This backend can batch oneshot requests and supports a user-space ring buffer to receive events. It also doesn't suffer from most of the design problems of epoll (such as not being able to remove event sources from the epoll set), and generally sounds too good to be true. Because, this being the Linux kernel, of course it suffers from a whole new set of limitations, forcing you to fall back to epoll, inheriting all its design issues. .Sp For one, it is not easily embeddable (but probably could be done using an event fd at some extra overhead). It also is subject to a system wide limit that can be configured in \fI/proc/sys/fs/aio\-max\-nr\fR. If no \s-1AIO\s0 requests are left, this backend will be skipped during initialisation, and will switch to epoll when the loop is active. .Sp Most problematic in practice, however, is that not all file descriptors work with it. For example, in Linux 5.1, \s-1TCP\s0 sockets, pipes, event fds, files, \fI/dev/null\fR and many others are supported, but ttys do not work properly (a known bug that the kernel developers don't care about, see ), so this is not (yet?) a generic event polling interface. .Sp Overall, it seems the Linux developers just don't want it to have a generic event handling mechanism other than \f(CW\*(C`select\*(C'\fR or \f(CW\*(C`poll\*(C'\fR. .Sp To work around all these problem, the current version of libev uses its epoll backend as a fallback for file descriptor types that do not work. Or falls back completely to epoll if the kernel acts up. .Sp This backend maps \f(CW\*(C`EV_READ\*(C'\fR and \f(CW\*(C`EV_WRITE\*(C'\fR in the same way as \&\f(CW\*(C`EVBACKEND_POLL\*(C'\fR. .ie n .IP """EVBACKEND_KQUEUE"" (value 8, most \s-1BSD\s0 clones)" 4 .el .IP "\f(CWEVBACKEND_KQUEUE\fR (value 8, most \s-1BSD\s0 clones)" 4 .IX Item "EVBACKEND_KQUEUE (value 8, most BSD clones)" Kqueue deserves special mention, as at the time this backend was implemented, it was broken on all BSDs except NetBSD (usually it doesn't work reliably with anything but sockets and pipes, except on Darwin, where of course it's completely useless). Unlike epoll, however, whose brokenness is by design, these kqueue bugs can be (and mostly have been) fixed without \s-1API\s0 changes to existing programs. For this reason it's not being \*(L"auto-detected\*(R" on all platforms unless you explicitly specify it in the flags (i.e. using \f(CW\*(C`EVBACKEND_KQUEUE\*(C'\fR) or libev was compiled on a known-to-be-good (\-enough) system like NetBSD. .Sp You still can embed kqueue into a normal poll or select backend and use it only for sockets (after having made sure that sockets work with kqueue on the target platform). See \f(CW\*(C`ev_embed\*(C'\fR watchers for more info. .Sp It scales in the same way as the epoll backend, but the interface to the kernel is more efficient (which says nothing about its actual speed, of course). While stopping, setting and starting an I/O watcher does never cause an extra system call as with \f(CW\*(C`EVBACKEND_EPOLL\*(C'\fR, it still adds up to two event changes per incident. Support for \f(CW\*(C`fork ()\*(C'\fR is very bad (you might have to leak fds on fork, but it's more sane than epoll) and it drops fds silently in similarly hard-to-detect cases. .Sp This backend usually performs well under most conditions. .Sp While nominally embeddable in other event loops, this doesn't work everywhere, so you might need to test for this. And since it is broken almost everywhere, you should only use it when you have a lot of sockets (for which it usually works), by embedding it into another event loop (e.g. \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR or \f(CW\*(C`EVBACKEND_POLL\*(C'\fR (but \f(CW\*(C`poll\*(C'\fR is of course also broken on \s-1OS X\s0)) and, did I mention it, using it only for sockets. .Sp This backend maps \f(CW\*(C`EV_READ\*(C'\fR into an \f(CW\*(C`EVFILT_READ\*(C'\fR kevent with \&\f(CW\*(C`NOTE_EOF\*(C'\fR, and \f(CW\*(C`EV_WRITE\*(C'\fR into an \f(CW\*(C`EVFILT_WRITE\*(C'\fR kevent with \&\f(CW\*(C`NOTE_EOF\*(C'\fR. .ie n .IP """EVBACKEND_DEVPOLL"" (value 16, Solaris 8)" 4 .el .IP "\f(CWEVBACKEND_DEVPOLL\fR (value 16, Solaris 8)" 4 .IX Item "EVBACKEND_DEVPOLL (value 16, Solaris 8)" This is not implemented yet (and might never be, unless you send me an implementation). According to reports, \f(CW\*(C`/dev/poll\*(C'\fR only supports sockets and is not embeddable, which would limit the usefulness of this backend immensely. .ie n .IP """EVBACKEND_PORT"" (value 32, Solaris 10)" 4 .el .IP "\f(CWEVBACKEND_PORT\fR (value 32, Solaris 10)" 4 .IX Item "EVBACKEND_PORT (value 32, Solaris 10)" This uses the Solaris 10 event port mechanism. As with everything on Solaris, it's really slow, but it still scales very well (O(active_fds)). .Sp While this backend scales well, it requires one system call per active file descriptor per loop iteration. For small and medium numbers of file descriptors a \*(L"slow\*(R" \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR or \f(CW\*(C`EVBACKEND_POLL\*(C'\fR backend might perform better. .Sp On the positive side, this backend actually performed fully to specification in all tests and is fully embeddable, which is a rare feat among the OS-specific backends (I vastly prefer correctness over speed hacks). .Sp On the negative side, the interface is \fIbizarre\fR \- so bizarre that even sun itself gets it wrong in their code examples: The event polling function sometimes returns events to the caller even though an error occurred, but with no indication whether it has done so or not (yes, it's even documented that way) \- deadly for edge-triggered interfaces where you absolutely have to know whether an event occurred or not because you have to re-arm the watcher. .Sp Fortunately libev seems to be able to work around these idiocies. .Sp This backend maps \f(CW\*(C`EV_READ\*(C'\fR and \f(CW\*(C`EV_WRITE\*(C'\fR in the same way as \&\f(CW\*(C`EVBACKEND_POLL\*(C'\fR. .ie n .IP """EVBACKEND_ALL""" 4 .el .IP "\f(CWEVBACKEND_ALL\fR" 4 .IX Item "EVBACKEND_ALL" Try all backends (even potentially broken ones that wouldn't be tried with \f(CW\*(C`EVFLAG_AUTO\*(C'\fR). Since this is a mask, you can do stuff such as \&\f(CW\*(C`EVBACKEND_ALL & ~EVBACKEND_KQUEUE\*(C'\fR. .Sp It is definitely not recommended to use this flag, use whatever \&\f(CW\*(C`ev_recommended_backends ()\*(C'\fR returns, or simply do not specify a backend at all. .ie n .IP """EVBACKEND_MASK""" 4 .el .IP "\f(CWEVBACKEND_MASK\fR" 4 .IX Item "EVBACKEND_MASK" Not a backend at all, but a mask to select all backend bits from a \&\f(CW\*(C`flags\*(C'\fR value, in case you want to mask out any backends from a flags value (e.g. when modifying the \f(CW\*(C`LIBEV_FLAGS\*(C'\fR environment variable). .RE .RS 4 .Sp If one or more of the backend flags are or'ed into the flags value, then only these backends will be tried (in the reverse order as listed here). If none are specified, all backends in \f(CW\*(C`ev_recommended_backends ()\*(C'\fR will be tried. .Sp Example: Try to create a event loop that uses epoll and nothing else. .Sp .Vb 3 \& struct ev_loop *epoller = ev_loop_new (EVBACKEND_EPOLL | EVFLAG_NOENV); \& if (!epoller) \& fatal ("no epoll found here, maybe it hides under your chair"); .Ve .Sp Example: Use whatever libev has to offer, but make sure that kqueue is used if available. .Sp .Vb 1 \& struct ev_loop *loop = ev_loop_new (ev_recommended_backends () | EVBACKEND_KQUEUE); .Ve .Sp Example: Similarly, on linux, you mgiht want to take advantage of the linux aio backend if possible, but fall back to something else if that isn't available. .Sp .Vb 1 \& struct ev_loop *loop = ev_loop_new (ev_recommended_backends () | EVBACKEND_LINUXAIO); .Ve .RE .IP "ev_loop_destroy (loop)" 4 .IX Item "ev_loop_destroy (loop)" Destroys an event loop object (frees all memory and kernel state etc.). None of the active event watchers will be stopped in the normal sense, so e.g. \f(CW\*(C`ev_is_active\*(C'\fR might still return true. It is your responsibility to either stop all watchers cleanly yourself \fIbefore\fR calling this function, or cope with the fact afterwards (which is usually the easiest thing, you can just ignore the watchers and/or \f(CW\*(C`free ()\*(C'\fR them for example). .Sp Note that certain global state, such as signal state (and installed signal handlers), will not be freed by this function, and related watchers (such as signal and child watchers) would need to be stopped manually. .Sp This function is normally used on loop objects allocated by \&\f(CW\*(C`ev_loop_new\*(C'\fR, but it can also be used on the default loop returned by \&\f(CW\*(C`ev_default_loop\*(C'\fR, in which case it is not thread-safe. .Sp Note that it is not advisable to call this function on the default loop except in the rare occasion where you really need to free its resources. If you need dynamically allocated loops it is better to use \f(CW\*(C`ev_loop_new\*(C'\fR and \f(CW\*(C`ev_loop_destroy\*(C'\fR. .IP "ev_loop_fork (loop)" 4 .IX Item "ev_loop_fork (loop)" This function sets a flag that causes subsequent \f(CW\*(C`ev_run\*(C'\fR iterations to reinitialise the kernel state for backends that have one. Despite the name, you can call it anytime you are allowed to start or stop watchers (except inside an \f(CW\*(C`ev_prepare\*(C'\fR callback), but it makes most sense after forking, in the child process. You \fImust\fR call it (or use \&\f(CW\*(C`EVFLAG_FORKCHECK\*(C'\fR) in the child before resuming or calling \f(CW\*(C`ev_run\*(C'\fR. .Sp In addition, if you want to reuse a loop (via this function or \&\f(CW\*(C`EVFLAG_FORKCHECK\*(C'\fR), you \fIalso\fR have to ignore \f(CW\*(C`SIGPIPE\*(C'\fR. .Sp Again, you \fIhave\fR to call it on \fIany\fR loop that you want to re-use after a fork, \fIeven if you do not plan to use the loop in the parent\fR. This is because some kernel interfaces *cough* \fIkqueue\fR *cough* do funny things during fork. .Sp On the other hand, you only need to call this function in the child process if and only if you want to use the event loop in the child. If you just fork+exec or create a new loop in the child, you don't have to call it at all (in fact, \f(CW\*(C`epoll\*(C'\fR is so badly broken that it makes a difference, but libev will usually detect this case on its own and do a costly reset of the backend). .Sp The function itself is quite fast and it's usually not a problem to call it just in case after a fork. .Sp Example: Automate calling \f(CW\*(C`ev_loop_fork\*(C'\fR on the default loop when using pthreads. .Sp .Vb 5 \& static void \& post_fork_child (void) \& { \& ev_loop_fork (EV_DEFAULT); \& } \& \& ... \& pthread_atfork (0, 0, post_fork_child); .Ve .IP "int ev_is_default_loop (loop)" 4 .IX Item "int ev_is_default_loop (loop)" Returns true when the given loop is, in fact, the default loop, and false otherwise. .IP "unsigned int ev_iteration (loop)" 4 .IX Item "unsigned int ev_iteration (loop)" Returns the current iteration count for the event loop, which is identical to the number of times libev did poll for new events. It starts at \f(CW0\fR and happily wraps around with enough iterations. .Sp This value can sometimes be useful as a generation counter of sorts (it \&\*(L"ticks\*(R" the number of loop iterations), as it roughly corresponds with \&\f(CW\*(C`ev_prepare\*(C'\fR and \f(CW\*(C`ev_check\*(C'\fR calls \- and is incremented between the prepare and check phases. .IP "unsigned int ev_depth (loop)" 4 .IX Item "unsigned int ev_depth (loop)" Returns the number of times \f(CW\*(C`ev_run\*(C'\fR was entered minus the number of times \f(CW\*(C`ev_run\*(C'\fR was exited normally, in other words, the recursion depth. .Sp Outside \f(CW\*(C`ev_run\*(C'\fR, this number is zero. In a callback, this number is \&\f(CW1\fR, unless \f(CW\*(C`ev_run\*(C'\fR was invoked recursively (or from another thread), in which case it is higher. .Sp Leaving \f(CW\*(C`ev_run\*(C'\fR abnormally (setjmp/longjmp, cancelling the thread, throwing an exception etc.), doesn't count as \*(L"exit\*(R" \- consider this as a hint to avoid such ungentleman-like behaviour unless it's really convenient, in which case it is fully supported. .IP "unsigned int ev_backend (loop)" 4 .IX Item "unsigned int ev_backend (loop)" Returns one of the \f(CW\*(C`EVBACKEND_*\*(C'\fR flags indicating the event backend in use. .IP "ev_tstamp ev_now (loop)" 4 .IX Item "ev_tstamp ev_now (loop)" Returns the current \*(L"event loop time\*(R", which is the time the event loop received events and started processing them. This timestamp does not change as long as callbacks are being processed, and this is also the base time used for relative timers. You can treat it as the timestamp of the event occurring (or more correctly, libev finding out about it). .IP "ev_now_update (loop)" 4 .IX Item "ev_now_update (loop)" Establishes the current time by querying the kernel, updating the time returned by \f(CW\*(C`ev_now ()\*(C'\fR in the progress. This is a costly operation and is usually done automatically within \f(CW\*(C`ev_run ()\*(C'\fR. .Sp This function is rarely useful, but when some event callback runs for a very long time without entering the event loop, updating libev's idea of the current time is a good idea. .Sp See also \*(L"The special problem of time updates\*(R" in the \f(CW\*(C`ev_timer\*(C'\fR section. .IP "ev_suspend (loop)" 4 .IX Item "ev_suspend (loop)" .PD 0 .IP "ev_resume (loop)" 4 .IX Item "ev_resume (loop)" .PD These two functions suspend and resume an event loop, for use when the loop is not used for a while and timeouts should not be processed. .Sp A typical use case would be an interactive program such as a game: When the user presses \f(CW\*(C`^Z\*(C'\fR to suspend the game and resumes it an hour later it would be best to handle timeouts as if no time had actually passed while the program was suspended. This can be achieved by calling \f(CW\*(C`ev_suspend\*(C'\fR in your \f(CW\*(C`SIGTSTP\*(C'\fR handler, sending yourself a \f(CW\*(C`SIGSTOP\*(C'\fR and calling \&\f(CW\*(C`ev_resume\*(C'\fR directly afterwards to resume timer processing. .Sp Effectively, all \f(CW\*(C`ev_timer\*(C'\fR watchers will be delayed by the time spend between \f(CW\*(C`ev_suspend\*(C'\fR and \f(CW\*(C`ev_resume\*(C'\fR, and all \f(CW\*(C`ev_periodic\*(C'\fR watchers will be rescheduled (that is, they will lose any events that would have occurred while suspended). .Sp After calling \f(CW\*(C`ev_suspend\*(C'\fR you \fBmust not\fR call \fIany\fR function on the given loop other than \f(CW\*(C`ev_resume\*(C'\fR, and you \fBmust not\fR call \f(CW\*(C`ev_resume\*(C'\fR without a previous call to \f(CW\*(C`ev_suspend\*(C'\fR. .Sp Calling \f(CW\*(C`ev_suspend\*(C'\fR/\f(CW\*(C`ev_resume\*(C'\fR has the side effect of updating the event loop time (see \f(CW\*(C`ev_now_update\*(C'\fR). .IP "bool ev_run (loop, int flags)" 4 .IX Item "bool ev_run (loop, int flags)" Finally, this is it, the event handler. This function usually is called after you have initialised all your watchers and you want to start handling events. It will ask the operating system for any new events, call the watcher callbacks, and then repeat the whole process indefinitely: This is why event loops are called \fIloops\fR. .Sp If the flags argument is specified as \f(CW0\fR, it will keep handling events until either no event watchers are active anymore or \f(CW\*(C`ev_break\*(C'\fR was called. .Sp The return value is false if there are no more active watchers (which usually means \*(L"all jobs done\*(R" or \*(L"deadlock\*(R"), and true in all other cases (which usually means " you should call \f(CW\*(C`ev_run\*(C'\fR again"). .Sp Please note that an explicit \f(CW\*(C`ev_break\*(C'\fR is usually better than relying on all watchers to be stopped when deciding when a program has finished (especially in interactive programs), but having a program that automatically loops as long as it has to and no longer by virtue of relying on its watchers stopping correctly, that is truly a thing of beauty. .Sp This function is \fImostly\fR exception-safe \- you can break out of a \&\f(CW\*(C`ev_run\*(C'\fR call by calling \f(CW\*(C`longjmp\*(C'\fR in a callback, throwing a \*(C+ exception and so on. This does not decrement the \f(CW\*(C`ev_depth\*(C'\fR value, nor will it clear any outstanding \f(CW\*(C`EVBREAK_ONE\*(C'\fR breaks. .Sp A flags value of \f(CW\*(C`EVRUN_NOWAIT\*(C'\fR will look for new events, will handle those events and any already outstanding ones, but will not wait and block your process in case there are no events and will return after one iteration of the loop. This is sometimes useful to poll and handle new events while doing lengthy calculations, to keep the program responsive. .Sp A flags value of \f(CW\*(C`EVRUN_ONCE\*(C'\fR will look for new events (waiting if necessary) and will handle those and any already outstanding ones. It will block your process until at least one new event arrives (which could be an event internal to libev itself, so there is no guarantee that a user-registered callback will be called), and will return after one iteration of the loop. .Sp This is useful if you are waiting for some external event in conjunction with something not expressible using other libev watchers (i.e. "roll your own \f(CW\*(C`ev_run\*(C'\fR"). However, a pair of \f(CW\*(C`ev_prepare\*(C'\fR/\f(CW\*(C`ev_check\*(C'\fR watchers is usually a better approach for this kind of thing. .Sp Here are the gory details of what \f(CW\*(C`ev_run\*(C'\fR does (this is for your understanding, not a guarantee that things will work exactly like this in future versions): .Sp .Vb 10 \& \- Increment loop depth. \& \- Reset the ev_break status. \& \- Before the first iteration, call any pending watchers. \& LOOP: \& \- If EVFLAG_FORKCHECK was used, check for a fork. \& \- If a fork was detected (by any means), queue and call all fork watchers. \& \- Queue and call all prepare watchers. \& \- If ev_break was called, goto FINISH. \& \- If we have been forked, detach and recreate the kernel state \& as to not disturb the other process. \& \- Update the kernel state with all outstanding changes. \& \- Update the "event loop time" (ev_now ()). \& \- Calculate for how long to sleep or block, if at all \& (active idle watchers, EVRUN_NOWAIT or not having \& any active watchers at all will result in not sleeping). \& \- Sleep if the I/O and timer collect interval say so. \& \- Increment loop iteration counter. \& \- Block the process, waiting for any events. \& \- Queue all outstanding I/O (fd) events. \& \- Update the "event loop time" (ev_now ()), and do time jump adjustments. \& \- Queue all expired timers. \& \- Queue all expired periodics. \& \- Queue all idle watchers with priority higher than that of pending events. \& \- Queue all check watchers. \& \- Call all queued watchers in reverse order (i.e. check watchers first). \& Signals and child watchers are implemented as I/O watchers, and will \& be handled here by queueing them when their watcher gets executed. \& \- If ev_break has been called, or EVRUN_ONCE or EVRUN_NOWAIT \& were used, or there are no active watchers, goto FINISH, otherwise \& continue with step LOOP. \& FINISH: \& \- Reset the ev_break status iff it was EVBREAK_ONE. \& \- Decrement the loop depth. \& \- Return. .Ve .Sp Example: Queue some jobs and then loop until no events are outstanding anymore. .Sp .Vb 4 \& ... queue jobs here, make sure they register event watchers as long \& ... as they still have work to do (even an idle watcher will do..) \& ev_run (my_loop, 0); \& ... jobs done or somebody called break. yeah! .Ve .IP "ev_break (loop, how)" 4 .IX Item "ev_break (loop, how)" Can be used to make a call to \f(CW\*(C`ev_run\*(C'\fR return early (but only after it has processed all outstanding events). The \f(CW\*(C`how\*(C'\fR argument must be either \&\f(CW\*(C`EVBREAK_ONE\*(C'\fR, which will make the innermost \f(CW\*(C`ev_run\*(C'\fR call return, or \&\f(CW\*(C`EVBREAK_ALL\*(C'\fR, which will make all nested \f(CW\*(C`ev_run\*(C'\fR calls return. .Sp This \*(L"break state\*(R" will be cleared on the next call to \f(CW\*(C`ev_run\*(C'\fR. .Sp It is safe to call \f(CW\*(C`ev_break\*(C'\fR from outside any \f(CW\*(C`ev_run\*(C'\fR calls, too, in which case it will have no effect. .IP "ev_ref (loop)" 4 .IX Item "ev_ref (loop)" .PD 0 .IP "ev_unref (loop)" 4 .IX Item "ev_unref (loop)" .PD Ref/unref can be used to add or remove a reference count on the event loop: Every watcher keeps one reference, and as long as the reference count is nonzero, \f(CW\*(C`ev_run\*(C'\fR will not return on its own. .Sp This is useful when you have a watcher that you never intend to unregister, but that nevertheless should not keep \f(CW\*(C`ev_run\*(C'\fR from returning. In such a case, call \f(CW\*(C`ev_unref\*(C'\fR after starting, and \f(CW\*(C`ev_ref\*(C'\fR before stopping it. .Sp As an example, libev itself uses this for its internal signal pipe: It is not visible to the libev user and should not keep \f(CW\*(C`ev_run\*(C'\fR from exiting if no event watchers registered by it are active. It is also an excellent way to do this for generic recurring timers or from within third-party libraries. Just remember to \fIunref after start\fR and \fIref before stop\fR (but only if the watcher wasn't active before, or was active before, respectively. Note also that libev might stop watchers itself (e.g. non-repeating timers) in which case you have to \f(CW\*(C`ev_ref\*(C'\fR in the callback). .Sp Example: Create a signal watcher, but keep it from keeping \f(CW\*(C`ev_run\*(C'\fR running when nothing else is active. .Sp .Vb 4 \& ev_signal exitsig; \& ev_signal_init (&exitsig, sig_cb, SIGINT); \& ev_signal_start (loop, &exitsig); \& ev_unref (loop); .Ve .Sp Example: For some weird reason, unregister the above signal handler again. .Sp .Vb 2 \& ev_ref (loop); \& ev_signal_stop (loop, &exitsig); .Ve .IP "ev_set_io_collect_interval (loop, ev_tstamp interval)" 4 .IX Item "ev_set_io_collect_interval (loop, ev_tstamp interval)" .PD 0 .IP "ev_set_timeout_collect_interval (loop, ev_tstamp interval)" 4 .IX Item "ev_set_timeout_collect_interval (loop, ev_tstamp interval)" .PD These advanced functions influence the time that libev will spend waiting for events. Both time intervals are by default \f(CW0\fR, meaning that libev will try to invoke timer/periodic callbacks and I/O callbacks with minimum latency. .Sp Setting these to a higher value (the \f(CW\*(C`interval\*(C'\fR \fImust\fR be >= \f(CW0\fR) allows libev to delay invocation of I/O and timer/periodic callbacks to increase efficiency of loop iterations (or to increase power-saving opportunities). .Sp The idea is that sometimes your program runs just fast enough to handle one (or very few) event(s) per loop iteration. While this makes the program responsive, it also wastes a lot of \s-1CPU\s0 time to poll for new events, especially with backends like \f(CW\*(C`select ()\*(C'\fR which have a high overhead for the actual polling but can deliver many events at once. .Sp By setting a higher \fIio collect interval\fR you allow libev to spend more time collecting I/O events, so you can handle more events per iteration, at the cost of increasing latency. Timeouts (both \f(CW\*(C`ev_periodic\*(C'\fR and \&\f(CW\*(C`ev_timer\*(C'\fR) will not be affected. Setting this to a non-null value will introduce an additional \f(CW\*(C`ev_sleep ()\*(C'\fR call into most loop iterations. The sleep time ensures that libev will not poll for I/O events more often then once per this interval, on average (as long as the host time resolution is good enough). .Sp Likewise, by setting a higher \fItimeout collect interval\fR you allow libev to spend more time collecting timeouts, at the expense of increased latency/jitter/inexactness (the watcher callback will be called later). \f(CW\*(C`ev_io\*(C'\fR watchers will not be affected. Setting this to a non-null value will not introduce any overhead in libev. .Sp Many (busy) programs can usually benefit by setting the I/O collect interval to a value near \f(CW0.1\fR or so, which is often enough for interactive servers (of course not for games), likewise for timeouts. It usually doesn't make much sense to set it to a lower value than \f(CW0.01\fR, as this approaches the timing granularity of most systems. Note that if you do transactions with the outside world and you can't increase the parallelity, then this setting will limit your transaction rate (if you need to poll once per transaction and the I/O collect interval is 0.01, then you can't do more than 100 transactions per second). .Sp Setting the \fItimeout collect interval\fR can improve the opportunity for saving power, as the program will \*(L"bundle\*(R" timer callback invocations that are \*(L"near\*(R" in time together, by delaying some, thus reducing the number of times the process sleeps and wakes up again. Another useful technique to reduce iterations/wake\-ups is to use \f(CW\*(C`ev_periodic\*(C'\fR watchers and make sure they fire on, say, one-second boundaries only. .Sp Example: we only need 0.1s timeout granularity, and we wish not to poll more often than 100 times per second: .Sp .Vb 2 \& ev_set_timeout_collect_interval (EV_DEFAULT_UC_ 0.1); \& ev_set_io_collect_interval (EV_DEFAULT_UC_ 0.01); .Ve .IP "ev_invoke_pending (loop)" 4 .IX Item "ev_invoke_pending (loop)" This call will simply invoke all pending watchers while resetting their pending state. Normally, \f(CW\*(C`ev_run\*(C'\fR does this automatically when required, but when overriding the invoke callback this call comes handy. This function can be invoked from a watcher \- this can be useful for example when you want to do some lengthy calculation and want to pass further event handling to another thread (you still have to make sure only one thread executes within \f(CW\*(C`ev_invoke_pending\*(C'\fR or \f(CW\*(C`ev_run\*(C'\fR of course). .IP "int ev_pending_count (loop)" 4 .IX Item "int ev_pending_count (loop)" Returns the number of pending watchers \- zero indicates that no watchers are pending. .IP "ev_set_invoke_pending_cb (loop, void (*invoke_pending_cb)(\s-1EV_P\s0))" 4 .IX Item "ev_set_invoke_pending_cb (loop, void (*invoke_pending_cb)(EV_P))" This overrides the invoke pending functionality of the loop: Instead of invoking all pending watchers when there are any, \f(CW\*(C`ev_run\*(C'\fR will call this callback instead. This is useful, for example, when you want to invoke the actual watchers inside another context (another thread etc.). .Sp If you want to reset the callback, use \f(CW\*(C`ev_invoke_pending\*(C'\fR as new callback. .IP "ev_set_loop_release_cb (loop, void (*release)(\s-1EV_P\s0) throw (), void (*acquire)(\s-1EV_P\s0) throw ())" 4 .IX Item "ev_set_loop_release_cb (loop, void (*release)(EV_P) throw (), void (*acquire)(EV_P) throw ())" Sometimes you want to share the same loop between multiple threads. This can be done relatively simply by putting mutex_lock/unlock calls around each call to a libev function. .Sp However, \f(CW\*(C`ev_run\*(C'\fR can run an indefinite time, so it is not feasible to wait for it to return. One way around this is to wake up the event loop via \f(CW\*(C`ev_break\*(C'\fR and \f(CW\*(C`ev_async_send\*(C'\fR, another way is to set these \&\fIrelease\fR and \fIacquire\fR callbacks on the loop. .Sp When set, then \f(CW\*(C`release\*(C'\fR will be called just before the thread is suspended waiting for new events, and \f(CW\*(C`acquire\*(C'\fR is called just afterwards. .Sp Ideally, \f(CW\*(C`release\*(C'\fR will just call your mutex_unlock function, and \&\f(CW\*(C`acquire\*(C'\fR will just call the mutex_lock function again. .Sp While event loop modifications are allowed between invocations of \&\f(CW\*(C`release\*(C'\fR and \f(CW\*(C`acquire\*(C'\fR (that's their only purpose after all), no modifications done will affect the event loop, i.e. adding watchers will have no effect on the set of file descriptors being watched, or the time waited. Use an \f(CW\*(C`ev_async\*(C'\fR watcher to wake up \f(CW\*(C`ev_run\*(C'\fR when you want it to take note of any changes you made. .Sp In theory, threads executing \f(CW\*(C`ev_run\*(C'\fR will be async-cancel safe between invocations of \f(CW\*(C`release\*(C'\fR and \f(CW\*(C`acquire\*(C'\fR. .Sp See also the locking example in the \f(CW\*(C`THREADS\*(C'\fR section later in this document. .IP "ev_set_userdata (loop, void *data)" 4 .IX Item "ev_set_userdata (loop, void *data)" .PD 0 .IP "void *ev_userdata (loop)" 4 .IX Item "void *ev_userdata (loop)" .PD Set and retrieve a single \f(CW\*(C`void *\*(C'\fR associated with a loop. When \&\f(CW\*(C`ev_set_userdata\*(C'\fR has never been called, then \f(CW\*(C`ev_userdata\*(C'\fR returns \&\f(CW0\fR. .Sp These two functions can be used to associate arbitrary data with a loop, and are intended solely for the \f(CW\*(C`invoke_pending_cb\*(C'\fR, \f(CW\*(C`release\*(C'\fR and \&\f(CW\*(C`acquire\*(C'\fR callbacks described above, but of course can be (ab\-)used for any other purpose as well. .IP "ev_verify (loop)" 4 .IX Item "ev_verify (loop)" This function only does something when \f(CW\*(C`EV_VERIFY\*(C'\fR support has been compiled in, which is the default for non-minimal builds. It tries to go through all internal structures and checks them for validity. If anything is found to be inconsistent, it will print an error message to standard error and call \f(CW\*(C`abort ()\*(C'\fR. .Sp This can be used to catch bugs inside libev itself: under normal circumstances, this function will never abort as of course libev keeps its data structures consistent. .SH "ANATOMY OF A WATCHER" .IX Header "ANATOMY OF A WATCHER" In the following description, uppercase \f(CW\*(C`TYPE\*(C'\fR in names stands for the watcher type, e.g. \f(CW\*(C`ev_TYPE_start\*(C'\fR can mean \f(CW\*(C`ev_timer_start\*(C'\fR for timer watchers and \f(CW\*(C`ev_io_start\*(C'\fR for I/O watchers. .PP A watcher is an opaque structure that you allocate and register to record your interest in some event. To make a concrete example, imagine you want to wait for \s-1STDIN\s0 to become readable, you would create an \f(CW\*(C`ev_io\*(C'\fR watcher for that: .PP .Vb 5 \& static void my_cb (struct ev_loop *loop, ev_io *w, int revents) \& { \& ev_io_stop (w); \& ev_break (loop, EVBREAK_ALL); \& } \& \& struct ev_loop *loop = ev_default_loop (0); \& \& ev_io stdin_watcher; \& \& ev_init (&stdin_watcher, my_cb); \& ev_io_set (&stdin_watcher, STDIN_FILENO, EV_READ); \& ev_io_start (loop, &stdin_watcher); \& \& ev_run (loop, 0); .Ve .PP As you can see, you are responsible for allocating the memory for your watcher structures (and it is \fIusually\fR a bad idea to do this on the stack). .PP Each watcher has an associated watcher structure (called \f(CW\*(C`struct ev_TYPE\*(C'\fR or simply \f(CW\*(C`ev_TYPE\*(C'\fR, as typedefs are provided for all watcher structs). .PP Each watcher structure must be initialised by a call to \f(CW\*(C`ev_init (watcher *, callback)\*(C'\fR, which expects a callback to be provided. This callback is invoked each time the event occurs (or, in the case of I/O watchers, each time the event loop detects that the file descriptor given is readable and/or writable). .PP Each watcher type further has its own \f(CW\*(C`ev_TYPE_set (watcher *, ...)\*(C'\fR macro to configure it, with arguments specific to the watcher type. There is also a macro to combine initialisation and setting in one call: \f(CW\*(C`ev_TYPE_init (watcher *, callback, ...)\*(C'\fR. .PP To make the watcher actually watch out for events, you have to start it with a watcher-specific start function (\f(CW\*(C`ev_TYPE_start (loop, watcher *)\*(C'\fR), and you can stop watching for events at any time by calling the corresponding stop function (\f(CW\*(C`ev_TYPE_stop (loop, watcher *)\*(C'\fR. .PP As long as your watcher is active (has been started but not stopped) you must not touch the values stored in it except when explicitly documented otherwise. Most specifically you must never reinitialise it or call its \&\f(CW\*(C`ev_TYPE_set\*(C'\fR macro. .PP Each and every callback receives the event loop pointer as first, the registered watcher structure as second, and a bitset of received events as third argument. .PP The received events usually include a single bit per event type received (you can receive multiple events at the same time). The possible bit masks are: .ie n .IP """EV_READ""" 4 .el .IP "\f(CWEV_READ\fR" 4 .IX Item "EV_READ" .PD 0 .ie n .IP """EV_WRITE""" 4 .el .IP "\f(CWEV_WRITE\fR" 4 .IX Item "EV_WRITE" .PD The file descriptor in the \f(CW\*(C`ev_io\*(C'\fR watcher has become readable and/or writable. .ie n .IP """EV_TIMER""" 4 .el .IP "\f(CWEV_TIMER\fR" 4 .IX Item "EV_TIMER" The \f(CW\*(C`ev_timer\*(C'\fR watcher has timed out. .ie n .IP """EV_PERIODIC""" 4 .el .IP "\f(CWEV_PERIODIC\fR" 4 .IX Item "EV_PERIODIC" The \f(CW\*(C`ev_periodic\*(C'\fR watcher has timed out. .ie n .IP """EV_SIGNAL""" 4 .el .IP "\f(CWEV_SIGNAL\fR" 4 .IX Item "EV_SIGNAL" The signal specified in the \f(CW\*(C`ev_signal\*(C'\fR watcher has been received by a thread. .ie n .IP """EV_CHILD""" 4 .el .IP "\f(CWEV_CHILD\fR" 4 .IX Item "EV_CHILD" The pid specified in the \f(CW\*(C`ev_child\*(C'\fR watcher has received a status change. .ie n .IP """EV_STAT""" 4 .el .IP "\f(CWEV_STAT\fR" 4 .IX Item "EV_STAT" The path specified in the \f(CW\*(C`ev_stat\*(C'\fR watcher changed its attributes somehow. .ie n .IP """EV_IDLE""" 4 .el .IP "\f(CWEV_IDLE\fR" 4 .IX Item "EV_IDLE" The \f(CW\*(C`ev_idle\*(C'\fR watcher has determined that you have nothing better to do. .ie n .IP """EV_PREPARE""" 4 .el .IP "\f(CWEV_PREPARE\fR" 4 .IX Item "EV_PREPARE" .PD 0 .ie n .IP """EV_CHECK""" 4 .el .IP "\f(CWEV_CHECK\fR" 4 .IX Item "EV_CHECK" .PD All \f(CW\*(C`ev_prepare\*(C'\fR watchers are invoked just \fIbefore\fR \f(CW\*(C`ev_run\*(C'\fR starts to gather new events, and all \f(CW\*(C`ev_check\*(C'\fR watchers are queued (not invoked) just after \f(CW\*(C`ev_run\*(C'\fR has gathered them, but before it queues any callbacks for any received events. That means \f(CW\*(C`ev_prepare\*(C'\fR watchers are the last watchers invoked before the event loop sleeps or polls for new events, and \&\f(CW\*(C`ev_check\*(C'\fR watchers will be invoked before any other watchers of the same or lower priority within an event loop iteration. .Sp Callbacks of both watcher types can start and stop as many watchers as they want, and all of them will be taken into account (for example, a \&\f(CW\*(C`ev_prepare\*(C'\fR watcher might start an idle watcher to keep \f(CW\*(C`ev_run\*(C'\fR from blocking). .ie n .IP """EV_EMBED""" 4 .el .IP "\f(CWEV_EMBED\fR" 4 .IX Item "EV_EMBED" The embedded event loop specified in the \f(CW\*(C`ev_embed\*(C'\fR watcher needs attention. .ie n .IP """EV_FORK""" 4 .el .IP "\f(CWEV_FORK\fR" 4 .IX Item "EV_FORK" The event loop has been resumed in the child process after fork (see \&\f(CW\*(C`ev_fork\*(C'\fR). .ie n .IP """EV_CLEANUP""" 4 .el .IP "\f(CWEV_CLEANUP\fR" 4 .IX Item "EV_CLEANUP" The event loop is about to be destroyed (see \f(CW\*(C`ev_cleanup\*(C'\fR). .ie n .IP """EV_ASYNC""" 4 .el .IP "\f(CWEV_ASYNC\fR" 4 .IX Item "EV_ASYNC" The given async watcher has been asynchronously notified (see \f(CW\*(C`ev_async\*(C'\fR). .ie n .IP """EV_CUSTOM""" 4 .el .IP "\f(CWEV_CUSTOM\fR" 4 .IX Item "EV_CUSTOM" Not ever sent (or otherwise used) by libev itself, but can be freely used by libev users to signal watchers (e.g. via \f(CW\*(C`ev_feed_event\*(C'\fR). .ie n .IP """EV_ERROR""" 4 .el .IP "\f(CWEV_ERROR\fR" 4 .IX Item "EV_ERROR" An unspecified error has occurred, the watcher has been stopped. This might happen because the watcher could not be properly started because libev ran out of memory, a file descriptor was found to be closed or any other problem. Libev considers these application bugs. .Sp You best act on it by reporting the problem and somehow coping with the watcher being stopped. Note that well-written programs should not receive an error ever, so when your watcher receives it, this usually indicates a bug in your program. .Sp Libev will usually signal a few \*(L"dummy\*(R" events together with an error, for example it might indicate that a fd is readable or writable, and if your callbacks is well-written it can just attempt the operation and cope with the error from \fBread()\fR or \fBwrite()\fR. This will not work in multi-threaded programs, though, as the fd could already be closed and reused for another thing, so beware. .SS "\s-1GENERIC WATCHER FUNCTIONS\s0" .IX Subsection "GENERIC WATCHER FUNCTIONS" .ie n .IP """ev_init"" (ev_TYPE *watcher, callback)" 4 .el .IP "\f(CWev_init\fR (ev_TYPE *watcher, callback)" 4 .IX Item "ev_init (ev_TYPE *watcher, callback)" This macro initialises the generic portion of a watcher. The contents of the watcher object can be arbitrary (so \f(CW\*(C`malloc\*(C'\fR will do). Only the generic parts of the watcher are initialised, you \fIneed\fR to call the type-specific \f(CW\*(C`ev_TYPE_set\*(C'\fR macro afterwards to initialise the type-specific parts. For each type there is also a \f(CW\*(C`ev_TYPE_init\*(C'\fR macro which rolls both calls into one. .Sp You can reinitialise a watcher at any time as long as it has been stopped (or never started) and there are no pending events outstanding. .Sp The callback is always of type \f(CW\*(C`void (*)(struct ev_loop *loop, ev_TYPE *watcher, int revents)\*(C'\fR. .Sp Example: Initialise an \f(CW\*(C`ev_io\*(C'\fR watcher in two steps. .Sp .Vb 3 \& ev_io w; \& ev_init (&w, my_cb); \& ev_io_set (&w, STDIN_FILENO, EV_READ); .Ve .ie n .IP """ev_TYPE_set"" (ev_TYPE *watcher, [args])" 4 .el .IP "\f(CWev_TYPE_set\fR (ev_TYPE *watcher, [args])" 4 .IX Item "ev_TYPE_set (ev_TYPE *watcher, [args])" This macro initialises the type-specific parts of a watcher. You need to call \f(CW\*(C`ev_init\*(C'\fR at least once before you call this macro, but you can call \f(CW\*(C`ev_TYPE_set\*(C'\fR any number of times. You must not, however, call this macro on a watcher that is active (it can be pending, however, which is a difference to the \f(CW\*(C`ev_init\*(C'\fR macro). .Sp Although some watcher types do not have type-specific arguments (e.g. \f(CW\*(C`ev_prepare\*(C'\fR) you still need to call its \f(CW\*(C`set\*(C'\fR macro. .Sp See \f(CW\*(C`ev_init\*(C'\fR, above, for an example. .ie n .IP """ev_TYPE_init"" (ev_TYPE *watcher, callback, [args])" 4 .el .IP "\f(CWev_TYPE_init\fR (ev_TYPE *watcher, callback, [args])" 4 .IX Item "ev_TYPE_init (ev_TYPE *watcher, callback, [args])" This convenience macro rolls both \f(CW\*(C`ev_init\*(C'\fR and \f(CW\*(C`ev_TYPE_set\*(C'\fR macro calls into a single call. This is the most convenient method to initialise a watcher. The same limitations apply, of course. .Sp Example: Initialise and set an \f(CW\*(C`ev_io\*(C'\fR watcher in one step. .Sp .Vb 1 \& ev_io_init (&w, my_cb, STDIN_FILENO, EV_READ); .Ve .ie n .IP """ev_TYPE_start"" (loop, ev_TYPE *watcher)" 4 .el .IP "\f(CWev_TYPE_start\fR (loop, ev_TYPE *watcher)" 4 .IX Item "ev_TYPE_start (loop, ev_TYPE *watcher)" Starts (activates) the given watcher. Only active watchers will receive events. If the watcher is already active nothing will happen. .Sp Example: Start the \f(CW\*(C`ev_io\*(C'\fR watcher that is being abused as example in this whole section. .Sp .Vb 1 \& ev_io_start (EV_DEFAULT_UC, &w); .Ve .ie n .IP """ev_TYPE_stop"" (loop, ev_TYPE *watcher)" 4 .el .IP "\f(CWev_TYPE_stop\fR (loop, ev_TYPE *watcher)" 4 .IX Item "ev_TYPE_stop (loop, ev_TYPE *watcher)" Stops the given watcher if active, and clears the pending status (whether the watcher was active or not). .Sp It is possible that stopped watchers are pending \- for example, non-repeating timers are being stopped when they become pending \- but calling \f(CW\*(C`ev_TYPE_stop\*(C'\fR ensures that the watcher is neither active nor pending. If you want to free or reuse the memory used by the watcher it is therefore a good idea to always call its \f(CW\*(C`ev_TYPE_stop\*(C'\fR function. .IP "bool ev_is_active (ev_TYPE *watcher)" 4 .IX Item "bool ev_is_active (ev_TYPE *watcher)" Returns a true value iff the watcher is active (i.e. it has been started and not yet been stopped). As long as a watcher is active you must not modify it. .IP "bool ev_is_pending (ev_TYPE *watcher)" 4 .IX Item "bool ev_is_pending (ev_TYPE *watcher)" Returns a true value iff the watcher is pending, (i.e. it has outstanding events but its callback has not yet been invoked). As long as a watcher is pending (but not active) you must not call an init function on it (but \&\f(CW\*(C`ev_TYPE_set\*(C'\fR is safe), you must not change its priority, and you must make sure the watcher is available to libev (e.g. you cannot \f(CW\*(C`free ()\*(C'\fR it). .IP "callback ev_cb (ev_TYPE *watcher)" 4 .IX Item "callback ev_cb (ev_TYPE *watcher)" Returns the callback currently set on the watcher. .IP "ev_set_cb (ev_TYPE *watcher, callback)" 4 .IX Item "ev_set_cb (ev_TYPE *watcher, callback)" Change the callback. You can change the callback at virtually any time (modulo threads). .IP "ev_set_priority (ev_TYPE *watcher, int priority)" 4 .IX Item "ev_set_priority (ev_TYPE *watcher, int priority)" .PD 0 .IP "int ev_priority (ev_TYPE *watcher)" 4 .IX Item "int ev_priority (ev_TYPE *watcher)" .PD Set and query the priority of the watcher. The priority is a small integer between \f(CW\*(C`EV_MAXPRI\*(C'\fR (default: \f(CW2\fR) and \f(CW\*(C`EV_MINPRI\*(C'\fR (default: \f(CW\*(C`\-2\*(C'\fR). Pending watchers with higher priority will be invoked before watchers with lower priority, but priority will not keep watchers from being executed (except for \f(CW\*(C`ev_idle\*(C'\fR watchers). .Sp If you need to suppress invocation when higher priority events are pending you need to look at \f(CW\*(C`ev_idle\*(C'\fR watchers, which provide this functionality. .Sp You \fImust not\fR change the priority of a watcher as long as it is active or pending. .Sp Setting a priority outside the range of \f(CW\*(C`EV_MINPRI\*(C'\fR to \f(CW\*(C`EV_MAXPRI\*(C'\fR is fine, as long as you do not mind that the priority value you query might or might not have been clamped to the valid range. .Sp The default priority used by watchers when no priority has been set is always \f(CW0\fR, which is supposed to not be too high and not be too low :). .Sp See \*(L"\s-1WATCHER PRIORITY MODELS\*(R"\s0, below, for a more thorough treatment of priorities. .IP "ev_invoke (loop, ev_TYPE *watcher, int revents)" 4 .IX Item "ev_invoke (loop, ev_TYPE *watcher, int revents)" Invoke the \f(CW\*(C`watcher\*(C'\fR with the given \f(CW\*(C`loop\*(C'\fR and \f(CW\*(C`revents\*(C'\fR. Neither \&\f(CW\*(C`loop\*(C'\fR nor \f(CW\*(C`revents\*(C'\fR need to be valid as long as the watcher callback can deal with that fact, as both are simply passed through to the callback. .IP "int ev_clear_pending (loop, ev_TYPE *watcher)" 4 .IX Item "int ev_clear_pending (loop, ev_TYPE *watcher)" If the watcher is pending, this function clears its pending status and returns its \f(CW\*(C`revents\*(C'\fR bitset (as if its callback was invoked). If the watcher isn't pending it does nothing and returns \f(CW0\fR. .Sp Sometimes it can be useful to \*(L"poll\*(R" a watcher instead of waiting for its callback to be invoked, which can be accomplished with this function. .IP "ev_feed_event (loop, ev_TYPE *watcher, int revents)" 4 .IX Item "ev_feed_event (loop, ev_TYPE *watcher, int revents)" Feeds the given event set into the event loop, as if the specified event had happened for the specified watcher (which must be a pointer to an initialised but not necessarily started event watcher). Obviously you must not free the watcher as long as it has pending events. .Sp Stopping the watcher, letting libev invoke it, or calling \&\f(CW\*(C`ev_clear_pending\*(C'\fR will clear the pending event, even if the watcher was not started in the first place. .Sp See also \f(CW\*(C`ev_feed_fd_event\*(C'\fR and \f(CW\*(C`ev_feed_signal_event\*(C'\fR for related functions that do not need a watcher. .PP See also the \*(L"\s-1ASSOCIATING CUSTOM DATA WITH A WATCHER\*(R"\s0 and \*(L"\s-1BUILDING YOUR OWN COMPOSITE WATCHERS\*(R"\s0 idioms. .SS "\s-1WATCHER STATES\s0" .IX Subsection "WATCHER STATES" There are various watcher states mentioned throughout this manual \- active, pending and so on. In this section these states and the rules to transition between them will be described in more detail \- and while these rules might look complicated, they usually do \*(L"the right thing\*(R". .IP "initialised" 4 .IX Item "initialised" Before a watcher can be registered with the event loop it has to be initialised. This can be done with a call to \f(CW\*(C`ev_TYPE_init\*(C'\fR, or calls to \&\f(CW\*(C`ev_init\*(C'\fR followed by the watcher-specific \f(CW\*(C`ev_TYPE_set\*(C'\fR function. .Sp In this state it is simply some block of memory that is suitable for use in an event loop. It can be moved around, freed, reused etc. at will \- as long as you either keep the memory contents intact, or call \&\f(CW\*(C`ev_TYPE_init\*(C'\fR again. .IP "started/running/active" 4 .IX Item "started/running/active" Once a watcher has been started with a call to \f(CW\*(C`ev_TYPE_start\*(C'\fR it becomes property of the event loop, and is actively waiting for events. While in this state it cannot be accessed (except in a few documented ways), moved, freed or anything else \- the only legal thing is to keep a pointer to it, and call libev functions on it that are documented to work on active watchers. .IP "pending" 4 .IX Item "pending" If a watcher is active and libev determines that an event it is interested in has occurred (such as a timer expiring), it will become pending. It will stay in this pending state until either it is stopped or its callback is about to be invoked, so it is not normally pending inside the watcher callback. .Sp The watcher might or might not be active while it is pending (for example, an expired non-repeating timer can be pending but no longer active). If it is stopped, it can be freely accessed (e.g. by calling \f(CW\*(C`ev_TYPE_set\*(C'\fR), but it is still property of the event loop at this time, so cannot be moved, freed or reused. And if it is active the rules described in the previous item still apply. .Sp It is also possible to feed an event on a watcher that is not active (e.g. via \f(CW\*(C`ev_feed_event\*(C'\fR), in which case it becomes pending without being active. .IP "stopped" 4 .IX Item "stopped" A watcher can be stopped implicitly by libev (in which case it might still be pending), or explicitly by calling its \f(CW\*(C`ev_TYPE_stop\*(C'\fR function. The latter will clear any pending state the watcher might be in, regardless of whether it was active or not, so stopping a watcher explicitly before freeing it is often a good idea. .Sp While stopped (and not pending) the watcher is essentially in the initialised state, that is, it can be reused, moved, modified in any way you wish (but when you trash the memory block, you need to \f(CW\*(C`ev_TYPE_init\*(C'\fR it again). .SS "\s-1WATCHER PRIORITY MODELS\s0" .IX Subsection "WATCHER PRIORITY MODELS" Many event loops support \fIwatcher priorities\fR, which are usually small integers that influence the ordering of event callback invocation between watchers in some way, all else being equal. .PP In libev, watcher priorities can be set using \f(CW\*(C`ev_set_priority\*(C'\fR. See its description for the more technical details such as the actual priority range. .PP There are two common ways how these these priorities are being interpreted by event loops: .PP In the more common lock-out model, higher priorities \*(L"lock out\*(R" invocation of lower priority watchers, which means as long as higher priority watchers receive events, lower priority watchers are not being invoked. .PP The less common only-for-ordering model uses priorities solely to order callback invocation within a single event loop iteration: Higher priority watchers are invoked before lower priority ones, but they all get invoked before polling for new events. .PP Libev uses the second (only-for-ordering) model for all its watchers except for idle watchers (which use the lock-out model). .PP The rationale behind this is that implementing the lock-out model for watchers is not well supported by most kernel interfaces, and most event libraries will just poll for the same events again and again as long as their callbacks have not been executed, which is very inefficient in the common case of one high-priority watcher locking out a mass of lower priority ones. .PP Static (ordering) priorities are most useful when you have two or more watchers handling the same resource: a typical usage example is having an \&\f(CW\*(C`ev_io\*(C'\fR watcher to receive data, and an associated \f(CW\*(C`ev_timer\*(C'\fR to handle timeouts. Under load, data might be received while the program handles other jobs, but since timers normally get invoked first, the timeout handler will be executed before checking for data. In that case, giving the timer a lower priority than the I/O watcher ensures that I/O will be handled first even under adverse conditions (which is usually, but not always, what you want). .PP Since idle watchers use the \*(L"lock-out\*(R" model, meaning that idle watchers will only be executed when no same or higher priority watchers have received events, they can be used to implement the \*(L"lock-out\*(R" model when required. .PP For example, to emulate how many other event libraries handle priorities, you can associate an \f(CW\*(C`ev_idle\*(C'\fR watcher to each such watcher, and in the normal watcher callback, you just start the idle watcher. The real processing is done in the idle watcher callback. This causes libev to continuously poll and process kernel event data for the watcher, but when the lock-out case is known to be rare (which in turn is rare :), this is workable. .PP Usually, however, the lock-out model implemented that way will perform miserably under the type of load it was designed to handle. In that case, it might be preferable to stop the real watcher before starting the idle watcher, so the kernel will not have to process the event in case the actual processing will be delayed for considerable time. .PP Here is an example of an I/O watcher that should run at a strictly lower priority than the default, and which should only process data when no other events are pending: .PP .Vb 2 \& ev_idle idle; // actual processing watcher \& ev_io io; // actual event watcher \& \& static void \& io_cb (EV_P_ ev_io *w, int revents) \& { \& // stop the I/O watcher, we received the event, but \& // are not yet ready to handle it. \& ev_io_stop (EV_A_ w); \& \& // start the idle watcher to handle the actual event. \& // it will not be executed as long as other watchers \& // with the default priority are receiving events. \& ev_idle_start (EV_A_ &idle); \& } \& \& static void \& idle_cb (EV_P_ ev_idle *w, int revents) \& { \& // actual processing \& read (STDIN_FILENO, ...); \& \& // have to start the I/O watcher again, as \& // we have handled the event \& ev_io_start (EV_P_ &io); \& } \& \& // initialisation \& ev_idle_init (&idle, idle_cb); \& ev_io_init (&io, io_cb, STDIN_FILENO, EV_READ); \& ev_io_start (EV_DEFAULT_ &io); .Ve .PP In the \*(L"real\*(R" world, it might also be beneficial to start a timer, so that low-priority connections can not be locked out forever under load. This enables your program to keep a lower latency for important connections during short periods of high load, while not completely locking out less important ones. .SH "WATCHER TYPES" .IX Header "WATCHER TYPES" This section describes each watcher in detail, but will not repeat information given in the last section. Any initialisation/set macros, functions and members specific to the watcher type are explained. .PP Most members are additionally marked with either \fI[read\-only]\fR, meaning that, while the watcher is active, you can look at the member and expect some sensible content, but you must not modify it (you can modify it while the watcher is stopped to your hearts content), or \fI[read\-write]\fR, which means you can expect it to have some sensible content while the watcher is active, but you can also modify it (within the same thread as the event loop, i.e. without creating data races). Modifying it may not do something sensible or take immediate effect (or do anything at all), but libev will not crash or malfunction in any way. .PP In any case, the documentation for each member will explain what the effects are, and if there are any additional access restrictions. .ie n .SS """ev_io"" \- is this file descriptor readable or writable?" .el .SS "\f(CWev_io\fP \- is this file descriptor readable or writable?" .IX Subsection "ev_io - is this file descriptor readable or writable?" I/O watchers check whether a file descriptor is readable or writable in each iteration of the event loop, or, more precisely, when reading would not block the process and writing would at least be able to write some data. This behaviour is called level-triggering because you keep receiving events as long as the condition persists. Remember you can stop the watcher if you don't want to act on the event and neither want to receive future events. .PP In general you can register as many read and/or write event watchers per fd as you want (as long as you don't confuse yourself). Setting all file descriptors to non-blocking mode is also usually a good idea (but not required if you know what you are doing). .PP Another thing you have to watch out for is that it is quite easy to receive \*(L"spurious\*(R" readiness notifications, that is, your callback might be called with \f(CW\*(C`EV_READ\*(C'\fR but a subsequent \f(CW\*(C`read\*(C'\fR(2) will actually block because there is no data. It is very easy to get into this situation even with a relatively standard program structure. Thus it is best to always use non-blocking I/O: An extra \f(CW\*(C`read\*(C'\fR(2) returning \f(CW\*(C`EAGAIN\*(C'\fR is far preferable to a program hanging until some data arrives. .PP If you cannot run the fd in non-blocking mode (for example you should not play around with an Xlib connection), then you have to separately re-test whether a file descriptor is really ready with a known-to-be good interface such as poll (fortunately in the case of Xlib, it already does this on its own, so its quite safe to use). Some people additionally use \f(CW\*(C`SIGALRM\*(C'\fR and an interval timer, just to be sure you won't block indefinitely. .PP But really, best use non-blocking mode. .PP \fIThe special problem of disappearing file descriptors\fR .IX Subsection "The special problem of disappearing file descriptors" .PP Some backends (e.g. kqueue, epoll, linuxaio) need to be told about closing a file descriptor (either due to calling \f(CW\*(C`close\*(C'\fR explicitly or any other means, such as \f(CW\*(C`dup2\*(C'\fR). The reason is that you register interest in some file descriptor, but when it goes away, the operating system will silently drop this interest. If another file descriptor with the same number then is registered with libev, there is no efficient way to see that this is, in fact, a different file descriptor. .PP To avoid having to explicitly tell libev about such cases, libev follows the following policy: Each time \f(CW\*(C`ev_io_set\*(C'\fR is being called, libev will assume that this is potentially a new file descriptor, otherwise it is assumed that the file descriptor stays the same. That means that you \fIhave\fR to call \f(CW\*(C`ev_io_set\*(C'\fR (or \f(CW\*(C`ev_io_init\*(C'\fR) when you change the descriptor even if the file descriptor number itself did not change. .PP This is how one would do it normally anyway, the important point is that the libev application should not optimise around libev but should leave optimisations to libev. .PP \fIThe special problem of dup'ed file descriptors\fR .IX Subsection "The special problem of dup'ed file descriptors" .PP Some backends (e.g. epoll), cannot register events for file descriptors, but only events for the underlying file descriptions. That means when you have \f(CW\*(C`dup ()\*(C'\fR'ed file descriptors or weirder constellations, and register events for them, only one file descriptor might actually receive events. .PP There is no workaround possible except not registering events for potentially \f(CW\*(C`dup ()\*(C'\fR'ed file descriptors, or to resort to \&\f(CW\*(C`EVBACKEND_SELECT\*(C'\fR or \f(CW\*(C`EVBACKEND_POLL\*(C'\fR. .PP \fIThe special problem of files\fR .IX Subsection "The special problem of files" .PP Many people try to use \f(CW\*(C`select\*(C'\fR (or libev) on file descriptors representing files, and expect it to become ready when their program doesn't block on disk accesses (which can take a long time on their own). .PP However, this cannot ever work in the \*(L"expected\*(R" way \- you get a readiness notification as soon as the kernel knows whether and how much data is there, and in the case of open files, that's always the case, so you always get a readiness notification instantly, and your read (or possibly write) will still block on the disk I/O. .PP Another way to view it is that in the case of sockets, pipes, character devices and so on, there is another party (the sender) that delivers data on its own, but in the case of files, there is no such thing: the disk will not send data on its own, simply because it doesn't know what you wish to read \- you would first have to request some data. .PP Since files are typically not-so-well supported by advanced notification mechanism, libev tries hard to emulate \s-1POSIX\s0 behaviour with respect to files, even though you should not use it. The reason for this is convenience: sometimes you want to watch \s-1STDIN\s0 or \s-1STDOUT,\s0 which is usually a tty, often a pipe, but also sometimes files or special devices (for example, \f(CW\*(C`epoll\*(C'\fR on Linux works with \fI/dev/random\fR but not with \&\fI/dev/urandom\fR), and even though the file might better be served with asynchronous I/O instead of with non-blocking I/O, it is still useful when it \*(L"just works\*(R" instead of freezing. .PP So avoid file descriptors pointing to files when you know it (e.g. use libeio), but use them when it is convenient, e.g. for \s-1STDIN/STDOUT,\s0 or when you rarely read from a file instead of from a socket, and want to reuse the same code path. .PP \fIThe special problem of fork\fR .IX Subsection "The special problem of fork" .PP Some backends (epoll, kqueue, linuxaio, iouring) do not support \f(CW\*(C`fork ()\*(C'\fR at all or exhibit useless behaviour. Libev fully supports fork, but needs to be told about it in the child if you want to continue to use it in the child. .PP To support fork in your child processes, you have to call \f(CW\*(C`ev_loop_fork ()\*(C'\fR after a fork in the child, enable \f(CW\*(C`EVFLAG_FORKCHECK\*(C'\fR, or resort to \&\f(CW\*(C`EVBACKEND_SELECT\*(C'\fR or \f(CW\*(C`EVBACKEND_POLL\*(C'\fR. .PP \fIThe special problem of \s-1SIGPIPE\s0\fR .IX Subsection "The special problem of SIGPIPE" .PP While not really specific to libev, it is easy to forget about \f(CW\*(C`SIGPIPE\*(C'\fR: when writing to a pipe whose other end has been closed, your program gets sent a \s-1SIGPIPE,\s0 which, by default, aborts your program. For most programs this is sensible behaviour, for daemons, this is usually undesirable. .PP So when you encounter spurious, unexplained daemon exits, make sure you ignore \s-1SIGPIPE\s0 (and maybe make sure you log the exit status of your daemon somewhere, as that would have given you a big clue). .PP \fIThe special problem of \f(BIaccept()\fIing when you can't\fR .IX Subsection "The special problem of accept()ing when you can't" .PP Many implementations of the \s-1POSIX\s0 \f(CW\*(C`accept\*(C'\fR function (for example, found in post\-2004 Linux) have the peculiar behaviour of not removing a connection from the pending queue in all error cases. .PP For example, larger servers often run out of file descriptors (because of resource limits), causing \f(CW\*(C`accept\*(C'\fR to fail with \f(CW\*(C`ENFILE\*(C'\fR but not rejecting the connection, leading to libev signalling readiness on the next iteration again (the connection still exists after all), and typically causing the program to loop at 100% \s-1CPU\s0 usage. .PP Unfortunately, the set of errors that cause this issue differs between operating systems, there is usually little the app can do to remedy the situation, and no known thread-safe method of removing the connection to cope with overload is known (to me). .PP One of the easiest ways to handle this situation is to just ignore it \&\- when the program encounters an overload, it will just loop until the situation is over. While this is a form of busy waiting, no \s-1OS\s0 offers an event-based way to handle this situation, so it's the best one can do. .PP A better way to handle the situation is to log any errors other than \&\f(CW\*(C`EAGAIN\*(C'\fR and \f(CW\*(C`EWOULDBLOCK\*(C'\fR, making sure not to flood the log with such messages, and continue as usual, which at least gives the user an idea of what could be wrong (\*(L"raise the ulimit!\*(R"). For extra points one could stop the \f(CW\*(C`ev_io\*(C'\fR watcher on the listening fd \*(L"for a while\*(R", which reduces \s-1CPU\s0 usage. .PP If your program is single-threaded, then you could also keep a dummy file descriptor for overload situations (e.g. by opening \fI/dev/null\fR), and when you run into \f(CW\*(C`ENFILE\*(C'\fR or \f(CW\*(C`EMFILE\*(C'\fR, close it, run \f(CW\*(C`accept\*(C'\fR, close that fd, and create a new dummy fd. This will gracefully refuse clients under typical overload conditions. .PP The last way to handle it is to simply log the error and \f(CW\*(C`exit\*(C'\fR, as is often done with \f(CW\*(C`malloc\*(C'\fR failures, but this results in an easy opportunity for a DoS attack. .PP \fIWatcher-Specific Functions\fR .IX Subsection "Watcher-Specific Functions" .IP "ev_io_init (ev_io *, callback, int fd, int events)" 4 .IX Item "ev_io_init (ev_io *, callback, int fd, int events)" .PD 0 .IP "ev_io_set (ev_io *, int fd, int events)" 4 .IX Item "ev_io_set (ev_io *, int fd, int events)" .PD Configures an \f(CW\*(C`ev_io\*(C'\fR watcher. The \f(CW\*(C`fd\*(C'\fR is the file descriptor to receive events for and \f(CW\*(C`events\*(C'\fR is either \f(CW\*(C`EV_READ\*(C'\fR, \f(CW\*(C`EV_WRITE\*(C'\fR, both \&\f(CW\*(C`EV_READ | EV_WRITE\*(C'\fR or \f(CW0\fR, to express the desire to receive the given events. .Sp Note that setting the \f(CW\*(C`events\*(C'\fR to \f(CW0\fR and starting the watcher is supported, but not specially optimized \- if your program sometimes happens to generate this combination this is fine, but if it is easy to avoid starting an io watcher watching for no events you should do so. .IP "ev_io_modify (ev_io *, int events)" 4 .IX Item "ev_io_modify (ev_io *, int events)" Similar to \f(CW\*(C`ev_io_set\*(C'\fR, but only changes the requested events. Using this might be faster with some backends, as libev can assume that the \f(CW\*(C`fd\*(C'\fR still refers to the same underlying file description, something it cannot do when using \f(CW\*(C`ev_io_set\*(C'\fR. .IP "int fd [no\-modify]" 4 .IX Item "int fd [no-modify]" The file descriptor being watched. While it can be read at any time, you must not modify this member even when the watcher is stopped \- always use \&\f(CW\*(C`ev_io_set\*(C'\fR for that. .IP "int events [no\-modify]" 4 .IX Item "int events [no-modify]" The set of events the fd is being watched for, among other flags. Remember that this is a bit set \- to test for \f(CW\*(C`EV_READ\*(C'\fR, use \f(CW\*(C`w\->events & EV_READ\*(C'\fR, and similarly for \f(CW\*(C`EV_WRITE\*(C'\fR. .Sp As with \f(CW\*(C`fd\*(C'\fR, you must not modify this member even when the watcher is stopped, always use \f(CW\*(C`ev_io_set\*(C'\fR or \f(CW\*(C`ev_io_modify\*(C'\fR for that. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Call \f(CW\*(C`stdin_readable_cb\*(C'\fR when \s-1STDIN_FILENO\s0 has become, well readable, but only once. Since it is likely line-buffered, you could attempt to read a whole line in the callback. .PP .Vb 6 \& static void \& stdin_readable_cb (struct ev_loop *loop, ev_io *w, int revents) \& { \& ev_io_stop (loop, w); \& .. read from stdin here (or from w\->fd) and handle any I/O errors \& } \& \& ... \& struct ev_loop *loop = ev_default_init (0); \& ev_io stdin_readable; \& ev_io_init (&stdin_readable, stdin_readable_cb, STDIN_FILENO, EV_READ); \& ev_io_start (loop, &stdin_readable); \& ev_run (loop, 0); .Ve .ie n .SS """ev_timer"" \- relative and optionally repeating timeouts" .el .SS "\f(CWev_timer\fP \- relative and optionally repeating timeouts" .IX Subsection "ev_timer - relative and optionally repeating timeouts" Timer watchers are simple relative timers that generate an event after a given time, and optionally repeating in regular intervals after that. .PP The timers are based on real time, that is, if you register an event that times out after an hour and you reset your system clock to January last year, it will still time out after (roughly) one hour. \*(L"Roughly\*(R" because detecting time jumps is hard, and some inaccuracies are unavoidable (the monotonic clock option helps a lot here). .PP The callback is guaranteed to be invoked only \fIafter\fR its timeout has passed (not \fIat\fR, so on systems with very low-resolution clocks this might introduce a small delay, see \*(L"the special problem of being too early\*(R", below). If multiple timers become ready during the same loop iteration then the ones with earlier time-out values are invoked before ones of the same priority with later time-out values (but this is no longer true when a callback calls \f(CW\*(C`ev_run\*(C'\fR recursively). .PP \fIBe smart about timeouts\fR .IX Subsection "Be smart about timeouts" .PP Many real-world problems involve some kind of timeout, usually for error recovery. A typical example is an \s-1HTTP\s0 request \- if the other side hangs, you want to raise some error after a while. .PP What follows are some ways to handle this problem, from obvious and inefficient to smart and efficient. .PP In the following, a 60 second activity timeout is assumed \- a timeout that gets reset to 60 seconds each time there is activity (e.g. each time some data or other life sign was received). .IP "1. Use a timer and stop, reinitialise and start it on activity." 4 .IX Item "1. Use a timer and stop, reinitialise and start it on activity." This is the most obvious, but not the most simple way: In the beginning, start the watcher: .Sp .Vb 2 \& ev_timer_init (timer, callback, 60., 0.); \& ev_timer_start (loop, timer); .Ve .Sp Then, each time there is some activity, \f(CW\*(C`ev_timer_stop\*(C'\fR it, initialise it and start it again: .Sp .Vb 3 \& ev_timer_stop (loop, timer); \& ev_timer_set (timer, 60., 0.); \& ev_timer_start (loop, timer); .Ve .Sp This is relatively simple to implement, but means that each time there is some activity, libev will first have to remove the timer from its internal data structure and then add it again. Libev tries to be fast, but it's still not a constant-time operation. .ie n .IP "2. Use a timer and re-start it with ""ev_timer_again"" inactivity." 4 .el .IP "2. Use a timer and re-start it with \f(CWev_timer_again\fR inactivity." 4 .IX Item "2. Use a timer and re-start it with ev_timer_again inactivity." This is the easiest way, and involves using \f(CW\*(C`ev_timer_again\*(C'\fR instead of \&\f(CW\*(C`ev_timer_start\*(C'\fR. .Sp To implement this, configure an \f(CW\*(C`ev_timer\*(C'\fR with a \f(CW\*(C`repeat\*(C'\fR value of \f(CW60\fR and then call \f(CW\*(C`ev_timer_again\*(C'\fR at start and each time you successfully read or write some data. If you go into an idle state where you do not expect data to travel on the socket, you can \f(CW\*(C`ev_timer_stop\*(C'\fR the timer, and \f(CW\*(C`ev_timer_again\*(C'\fR will automatically restart it if need be. .Sp That means you can ignore both the \f(CW\*(C`ev_timer_start\*(C'\fR function and the \&\f(CW\*(C`after\*(C'\fR argument to \f(CW\*(C`ev_timer_set\*(C'\fR, and only ever use the \f(CW\*(C`repeat\*(C'\fR member and \f(CW\*(C`ev_timer_again\*(C'\fR. .Sp At start: .Sp .Vb 3 \& ev_init (timer, callback); \& timer\->repeat = 60.; \& ev_timer_again (loop, timer); .Ve .Sp Each time there is some activity: .Sp .Vb 1 \& ev_timer_again (loop, timer); .Ve .Sp It is even possible to change the time-out on the fly, regardless of whether the watcher is active or not: .Sp .Vb 2 \& timer\->repeat = 30.; \& ev_timer_again (loop, timer); .Ve .Sp This is slightly more efficient then stopping/starting the timer each time you want to modify its timeout value, as libev does not have to completely remove and re-insert the timer from/into its internal data structure. .Sp It is, however, even simpler than the \*(L"obvious\*(R" way to do it. .IP "3. Let the timer time out, but then re-arm it as required." 4 .IX Item "3. Let the timer time out, but then re-arm it as required." This method is more tricky, but usually most efficient: Most timeouts are relatively long compared to the intervals between other activity \- in our example, within 60 seconds, there are usually many I/O events with associated activity resets. .Sp In this case, it would be more efficient to leave the \f(CW\*(C`ev_timer\*(C'\fR alone, but remember the time of last activity, and check for a real timeout only within the callback: .Sp .Vb 3 \& ev_tstamp timeout = 60.; \& ev_tstamp last_activity; // time of last activity \& ev_timer timer; \& \& static void \& callback (EV_P_ ev_timer *w, int revents) \& { \& // calculate when the timeout would happen \& ev_tstamp after = last_activity \- ev_now (EV_A) + timeout; \& \& // if negative, it means we the timeout already occurred \& if (after < 0.) \& { \& // timeout occurred, take action \& } \& else \& { \& // callback was invoked, but there was some recent \& // activity. simply restart the timer to time out \& // after "after" seconds, which is the earliest time \& // the timeout can occur. \& ev_timer_set (w, after, 0.); \& ev_timer_start (EV_A_ w); \& } \& } .Ve .Sp To summarise the callback: first calculate in how many seconds the timeout will occur (by calculating the absolute time when it would occur, \&\f(CW\*(C`last_activity + timeout\*(C'\fR, and subtracting the current time, \f(CW\*(C`ev_now (EV_A)\*(C'\fR from that). .Sp If this value is negative, then we are already past the timeout, i.e. we timed out, and need to do whatever is needed in this case. .Sp Otherwise, we now the earliest time at which the timeout would trigger, and simply start the timer with this timeout value. .Sp In other words, each time the callback is invoked it will check whether the timeout occurred. If not, it will simply reschedule itself to check again at the earliest time it could time out. Rinse. Repeat. .Sp This scheme causes more callback invocations (about one every 60 seconds minus half the average time between activity), but virtually no calls to libev to change the timeout. .Sp To start the machinery, simply initialise the watcher and set \&\f(CW\*(C`last_activity\*(C'\fR to the current time (meaning there was some activity just now), then call the callback, which will \*(L"do the right thing\*(R" and start the timer: .Sp .Vb 3 \& last_activity = ev_now (EV_A); \& ev_init (&timer, callback); \& callback (EV_A_ &timer, 0); .Ve .Sp When there is some activity, simply store the current time in \&\f(CW\*(C`last_activity\*(C'\fR, no libev calls at all: .Sp .Vb 2 \& if (activity detected) \& last_activity = ev_now (EV_A); .Ve .Sp When your timeout value changes, then the timeout can be changed by simply providing a new value, stopping the timer and calling the callback, which will again do the right thing (for example, time out immediately :). .Sp .Vb 3 \& timeout = new_value; \& ev_timer_stop (EV_A_ &timer); \& callback (EV_A_ &timer, 0); .Ve .Sp This technique is slightly more complex, but in most cases where the time-out is unlikely to be triggered, much more efficient. .IP "4. Wee, just use a double-linked list for your timeouts." 4 .IX Item "4. Wee, just use a double-linked list for your timeouts." If there is not one request, but many thousands (millions...), all employing some kind of timeout with the same timeout value, then one can do even better: .Sp When starting the timeout, calculate the timeout value and put the timeout at the \fIend\fR of the list. .Sp Then use an \f(CW\*(C`ev_timer\*(C'\fR to fire when the timeout at the \fIbeginning\fR of the list is expected to fire (for example, using the technique #3). .Sp When there is some activity, remove the timer from the list, recalculate the timeout, append it to the end of the list again, and make sure to update the \f(CW\*(C`ev_timer\*(C'\fR if it was taken from the beginning of the list. .Sp This way, one can manage an unlimited number of timeouts in O(1) time for starting, stopping and updating the timers, at the expense of a major complication, and having to use a constant timeout. The constant timeout ensures that the list stays sorted. .PP So which method the best? .PP Method #2 is a simple no-brain-required solution that is adequate in most situations. Method #3 requires a bit more thinking, but handles many cases better, and isn't very complicated either. In most case, choosing either one is fine, with #3 being better in typical situations. .PP Method #1 is almost always a bad idea, and buys you nothing. Method #4 is rather complicated, but extremely efficient, something that really pays off after the first million or so of active timers, i.e. it's usually overkill :) .PP \fIThe special problem of being too early\fR .IX Subsection "The special problem of being too early" .PP If you ask a timer to call your callback after three seconds, then you expect it to be invoked after three seconds \- but of course, this cannot be guaranteed to infinite precision. Less obviously, it cannot be guaranteed to any precision by libev \- imagine somebody suspending the process with a \s-1STOP\s0 signal for a few hours for example. .PP So, libev tries to invoke your callback as soon as possible \fIafter\fR the delay has occurred, but cannot guarantee this. .PP A less obvious failure mode is calling your callback too early: many event loops compare timestamps with a \*(L"elapsed delay >= requested delay\*(R", but this can cause your callback to be invoked much earlier than you would expect. .PP To see why, imagine a system with a clock that only offers full second resolution (think windows if you can't come up with a broken enough \s-1OS\s0 yourself). If you schedule a one-second timer at the time 500.9, then the event loop will schedule your timeout to elapse at a system time of 500 (500.9 truncated to the resolution) + 1, or 501. .PP If an event library looks at the timeout 0.1s later, it will see \*(L"501 >= 501\*(R" and invoke the callback 0.1s after it was started, even though a one-second delay was requested \- this is being \*(L"too early\*(R", despite best intentions. .PP This is the reason why libev will never invoke the callback if the elapsed delay equals the requested delay, but only when the elapsed delay is larger than the requested delay. In the example above, libev would only invoke the callback at system time 502, or 1.1s after the timer was started. .PP So, while libev cannot guarantee that your callback will be invoked exactly when requested, it \fIcan\fR and \fIdoes\fR guarantee that the requested delay has actually elapsed, or in other words, it always errs on the \*(L"too late\*(R" side of things. .PP \fIThe special problem of time updates\fR .IX Subsection "The special problem of time updates" .PP Establishing the current time is a costly operation (it usually takes at least one system call): \s-1EV\s0 therefore updates its idea of the current time only before and after \f(CW\*(C`ev_run\*(C'\fR collects new events, which causes a growing difference between \f(CW\*(C`ev_now ()\*(C'\fR and \f(CW\*(C`ev_time ()\*(C'\fR when handling lots of events in one iteration. .PP The relative timeouts are calculated relative to the \f(CW\*(C`ev_now ()\*(C'\fR time. This is usually the right thing as this timestamp refers to the time of the event triggering whatever timeout you are modifying/starting. If you suspect event processing to be delayed and you \fIneed\fR to base the timeout on the current time, use something like the following to adjust for it: .PP .Vb 1 \& ev_timer_set (&timer, after + (ev_time () \- ev_now ()), 0.); .Ve .PP If the event loop is suspended for a long time, you can also force an update of the time returned by \f(CW\*(C`ev_now ()\*(C'\fR by calling \f(CW\*(C`ev_now_update ()\*(C'\fR, although that will push the event time of all outstanding events further into the future. .PP \fIThe special problem of unsynchronised clocks\fR .IX Subsection "The special problem of unsynchronised clocks" .PP Modern systems have a variety of clocks \- libev itself uses the normal \&\*(L"wall clock\*(R" clock and, if available, the monotonic clock (to avoid time jumps). .PP Neither of these clocks is synchronised with each other or any other clock on the system, so \f(CW\*(C`ev_time ()\*(C'\fR might return a considerably different time than \f(CW\*(C`gettimeofday ()\*(C'\fR or \f(CW\*(C`time ()\*(C'\fR. On a GNU/Linux system, for example, a call to \f(CW\*(C`gettimeofday\*(C'\fR might return a second count that is one higher than a directly following call to \f(CW\*(C`time\*(C'\fR. .PP The moral of this is to only compare libev-related timestamps with \&\f(CW\*(C`ev_time ()\*(C'\fR and \f(CW\*(C`ev_now ()\*(C'\fR, at least if you want better precision than a second or so. .PP One more problem arises due to this lack of synchronisation: if libev uses the system monotonic clock and you compare timestamps from \f(CW\*(C`ev_time\*(C'\fR or \f(CW\*(C`ev_now\*(C'\fR from when you started your timer and when your callback is invoked, you will find that sometimes the callback is a bit \*(L"early\*(R". .PP This is because \f(CW\*(C`ev_timer\*(C'\fRs work in real time, not wall clock time, so libev makes sure your callback is not invoked before the delay happened, \&\fImeasured according to the real time\fR, not the system clock. .PP If your timeouts are based on a physical timescale (e.g. \*(L"time out this connection after 100 seconds\*(R") then this shouldn't bother you as it is exactly the right behaviour. .PP If you want to compare wall clock/system timestamps to your timers, then you need to use \f(CW\*(C`ev_periodic\*(C'\fRs, as these are based on the wall clock time, where your comparisons will always generate correct results. .PP \fIThe special problems of suspended animation\fR .IX Subsection "The special problems of suspended animation" .PP When you leave the server world it is quite customary to hit machines that can suspend/hibernate \- what happens to the clocks during such a suspend? .PP Some quick tests made with a Linux 2.6.28 indicate that a suspend freezes all processes, while the clocks (\f(CW\*(C`times\*(C'\fR, \f(CW\*(C`CLOCK_MONOTONIC\*(C'\fR) continue to run until the system is suspended, but they will not advance while the system is suspended. That means, on resume, it will be as if the program was frozen for a few seconds, but the suspend time will not be counted towards \f(CW\*(C`ev_timer\*(C'\fR when a monotonic clock source is used. The real time clock advanced as expected, but if it is used as sole clocksource, then a long suspend would be detected as a time jump by libev, and timers would be adjusted accordingly. .PP I would not be surprised to see different behaviour in different between operating systems, \s-1OS\s0 versions or even different hardware. .PP The other form of suspend (job control, or sending a \s-1SIGSTOP\s0) will see a time jump in the monotonic clocks and the realtime clock. If the program is suspended for a very long time, and monotonic clock sources are in use, then you can expect \f(CW\*(C`ev_timer\*(C'\fRs to expire as the full suspension time will be counted towards the timers. When no monotonic clock source is in use, then libev will again assume a timejump and adjust accordingly. .PP It might be beneficial for this latter case to call \f(CW\*(C`ev_suspend\*(C'\fR and \f(CW\*(C`ev_resume\*(C'\fR in code that handles \f(CW\*(C`SIGTSTP\*(C'\fR, to at least get deterministic behaviour in this case (you can do nothing against \&\f(CW\*(C`SIGSTOP\*(C'\fR). .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_timer_init (ev_timer *, callback, ev_tstamp after, ev_tstamp repeat)" 4 .IX Item "ev_timer_init (ev_timer *, callback, ev_tstamp after, ev_tstamp repeat)" .PD 0 .IP "ev_timer_set (ev_timer *, ev_tstamp after, ev_tstamp repeat)" 4 .IX Item "ev_timer_set (ev_timer *, ev_tstamp after, ev_tstamp repeat)" .PD Configure the timer to trigger after \f(CW\*(C`after\*(C'\fR seconds (fractional and negative values are supported). If \f(CW\*(C`repeat\*(C'\fR is \f(CW0.\fR, then it will automatically be stopped once the timeout is reached. If it is positive, then the timer will automatically be configured to trigger again \f(CW\*(C`repeat\*(C'\fR seconds later, again, and again, until stopped manually. .Sp The timer itself will do a best-effort at avoiding drift, that is, if you configure a timer to trigger every 10 seconds, then it will normally trigger at exactly 10 second intervals. If, however, your program cannot keep up with the timer (because it takes longer than those 10 seconds to do stuff) the timer will not fire more than once per event loop iteration. .IP "ev_timer_again (loop, ev_timer *)" 4 .IX Item "ev_timer_again (loop, ev_timer *)" This will act as if the timer timed out, and restarts it again if it is repeating. It basically works like calling \f(CW\*(C`ev_timer_stop\*(C'\fR, updating the timeout to the \f(CW\*(C`repeat\*(C'\fR value and calling \f(CW\*(C`ev_timer_start\*(C'\fR. .Sp The exact semantics are as in the following rules, all of which will be applied to the watcher: .RS 4 .IP "If the timer is pending, the pending status is always cleared." 4 .IX Item "If the timer is pending, the pending status is always cleared." .PD 0 .IP "If the timer is started but non-repeating, stop it (as if it timed out, without invoking it)." 4 .IX Item "If the timer is started but non-repeating, stop it (as if it timed out, without invoking it)." .ie n .IP "If the timer is repeating, make the ""repeat"" value the new timeout and start the timer, if necessary." 4 .el .IP "If the timer is repeating, make the \f(CWrepeat\fR value the new timeout and start the timer, if necessary." 4 .IX Item "If the timer is repeating, make the repeat value the new timeout and start the timer, if necessary." .RE .RS 4 .PD .Sp This sounds a bit complicated, see \*(L"Be smart about timeouts\*(R", above, for a usage example. .RE .IP "ev_tstamp ev_timer_remaining (loop, ev_timer *)" 4 .IX Item "ev_tstamp ev_timer_remaining (loop, ev_timer *)" Returns the remaining time until a timer fires. If the timer is active, then this time is relative to the current event loop time, otherwise it's the timeout value currently configured. .Sp That is, after an \f(CW\*(C`ev_timer_set (w, 5, 7)\*(C'\fR, \f(CW\*(C`ev_timer_remaining\*(C'\fR returns \&\f(CW5\fR. When the timer is started and one second passes, \f(CW\*(C`ev_timer_remaining\*(C'\fR will return \f(CW4\fR. When the timer expires and is restarted, it will return roughly \f(CW7\fR (likely slightly less as callback invocation takes some time, too), and so on. .IP "ev_tstamp repeat [read\-write]" 4 .IX Item "ev_tstamp repeat [read-write]" The current \f(CW\*(C`repeat\*(C'\fR value. Will be used each time the watcher times out or \f(CW\*(C`ev_timer_again\*(C'\fR is called, and determines the next timeout (if any), which is also when any modifications are taken into account. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Create a timer that fires after 60 seconds. .PP .Vb 5 \& static void \& one_minute_cb (struct ev_loop *loop, ev_timer *w, int revents) \& { \& .. one minute over, w is actually stopped right here \& } \& \& ev_timer mytimer; \& ev_timer_init (&mytimer, one_minute_cb, 60., 0.); \& ev_timer_start (loop, &mytimer); .Ve .PP Example: Create a timeout timer that times out after 10 seconds of inactivity. .PP .Vb 5 \& static void \& timeout_cb (struct ev_loop *loop, ev_timer *w, int revents) \& { \& .. ten seconds without any activity \& } \& \& ev_timer mytimer; \& ev_timer_init (&mytimer, timeout_cb, 0., 10.); /* note, only repeat used */ \& ev_timer_again (&mytimer); /* start timer */ \& ev_run (loop, 0); \& \& // and in some piece of code that gets executed on any "activity": \& // reset the timeout to start ticking again at 10 seconds \& ev_timer_again (&mytimer); .Ve .ie n .SS """ev_periodic"" \- to cron or not to cron?" .el .SS "\f(CWev_periodic\fP \- to cron or not to cron?" .IX Subsection "ev_periodic - to cron or not to cron?" Periodic watchers are also timers of a kind, but they are very versatile (and unfortunately a bit complex). .PP Unlike \f(CW\*(C`ev_timer\*(C'\fR, periodic watchers are not based on real time (or relative time, the physical time that passes) but on wall clock time (absolute time, the thing you can read on your calendar or clock). The difference is that wall clock time can run faster or slower than real time, and time jumps are not uncommon (e.g. when you adjust your wrist-watch). .PP You can tell a periodic watcher to trigger after some specific point in time: for example, if you tell a periodic watcher to trigger \*(L"in 10 seconds\*(R" (by specifying e.g. \f(CW\*(C`ev_now () + 10.\*(C'\fR, that is, an absolute time not a delay) and then reset your system clock to January of the previous year, then it will take a year or more to trigger the event (unlike an \&\f(CW\*(C`ev_timer\*(C'\fR, which would still trigger roughly 10 seconds after starting it, as it uses a relative timeout). .PP \&\f(CW\*(C`ev_periodic\*(C'\fR watchers can also be used to implement vastly more complex timers, such as triggering an event on each \*(L"midnight, local time\*(R", or other complicated rules. This cannot easily be done with \f(CW\*(C`ev_timer\*(C'\fR watchers, as those cannot react to time jumps. .PP As with timers, the callback is guaranteed to be invoked only when the point in time where it is supposed to trigger has passed. If multiple timers become ready during the same loop iteration then the ones with earlier time-out values are invoked before ones with later time-out values (but this is no longer true when a callback calls \f(CW\*(C`ev_run\*(C'\fR recursively). .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_periodic_init (ev_periodic *, callback, ev_tstamp offset, ev_tstamp interval, reschedule_cb)" 4 .IX Item "ev_periodic_init (ev_periodic *, callback, ev_tstamp offset, ev_tstamp interval, reschedule_cb)" .PD 0 .IP "ev_periodic_set (ev_periodic *, ev_tstamp offset, ev_tstamp interval, reschedule_cb)" 4 .IX Item "ev_periodic_set (ev_periodic *, ev_tstamp offset, ev_tstamp interval, reschedule_cb)" .PD Lots of arguments, let's sort it out... There are basically three modes of operation, and we will explain them from simplest to most complex: .RS 4 .IP "\(bu" 4 absolute timer (offset = absolute time, interval = 0, reschedule_cb = 0) .Sp In this configuration the watcher triggers an event after the wall clock time \f(CW\*(C`offset\*(C'\fR has passed. It will not repeat and will not adjust when a time jump occurs, that is, if it is to be run at January 1st 2011 then it will be stopped and invoked when the system clock reaches or surpasses this point in time. .IP "\(bu" 4 repeating interval timer (offset = offset within interval, interval > 0, reschedule_cb = 0) .Sp In this mode the watcher will always be scheduled to time out at the next \&\f(CW\*(C`offset + N * interval\*(C'\fR time (for some integer N, which can also be negative) and then repeat, regardless of any time jumps. The \f(CW\*(C`offset\*(C'\fR argument is merely an offset into the \f(CW\*(C`interval\*(C'\fR periods. .Sp This can be used to create timers that do not drift with respect to the system clock, for example, here is an \f(CW\*(C`ev_periodic\*(C'\fR that triggers each hour, on the hour (with respect to \s-1UTC\s0): .Sp .Vb 1 \& ev_periodic_set (&periodic, 0., 3600., 0); .Ve .Sp This doesn't mean there will always be 3600 seconds in between triggers, but only that the callback will be called when the system time shows a full hour (\s-1UTC\s0), or more correctly, when the system time is evenly divisible by 3600. .Sp Another way to think about it (for the mathematically inclined) is that \&\f(CW\*(C`ev_periodic\*(C'\fR will try to run the callback in this mode at the next possible time where \f(CW\*(C`time = offset (mod interval)\*(C'\fR, regardless of any time jumps. .Sp The \f(CW\*(C`interval\*(C'\fR \fI\s-1MUST\s0\fR be positive, and for numerical stability, the interval value should be higher than \f(CW\*(C`1/8192\*(C'\fR (which is around 100 microseconds) and \f(CW\*(C`offset\*(C'\fR should be higher than \f(CW0\fR and should have at most a similar magnitude as the current time (say, within a factor of ten). Typical values for offset are, in fact, \f(CW0\fR or something between \&\f(CW0\fR and \f(CW\*(C`interval\*(C'\fR, which is also the recommended range. .Sp Note also that there is an upper limit to how often a timer can fire (\s-1CPU\s0 speed for example), so if \f(CW\*(C`interval\*(C'\fR is very small then timing stability will of course deteriorate. Libev itself tries to be exact to be about one millisecond (if the \s-1OS\s0 supports it and the machine is fast enough). .IP "\(bu" 4 manual reschedule mode (offset ignored, interval ignored, reschedule_cb = callback) .Sp In this mode the values for \f(CW\*(C`interval\*(C'\fR and \f(CW\*(C`offset\*(C'\fR are both being ignored. Instead, each time the periodic watcher gets scheduled, the reschedule callback will be called with the watcher as first, and the current time as second argument. .Sp \&\s-1NOTE:\s0 \fIThis callback \s-1MUST NOT\s0 stop or destroy any periodic watcher, ever, or make \s-1ANY\s0 other event loop modifications whatsoever, unless explicitly allowed by documentation here\fR. .Sp If you need to stop it, return \f(CW\*(C`now + 1e30\*(C'\fR (or so, fudge fudge) and stop it afterwards (e.g. by starting an \f(CW\*(C`ev_prepare\*(C'\fR watcher, which is the only event loop modification you are allowed to do). .Sp The callback prototype is \f(CW\*(C`ev_tstamp (*reschedule_cb)(ev_periodic *w, ev_tstamp now)\*(C'\fR, e.g.: .Sp .Vb 5 \& static ev_tstamp \& my_rescheduler (ev_periodic *w, ev_tstamp now) \& { \& return now + 60.; \& } .Ve .Sp It must return the next time to trigger, based on the passed time value (that is, the lowest time value larger than to the second argument). It will usually be called just before the callback will be triggered, but might be called at other times, too. .Sp \&\s-1NOTE:\s0 \fIThis callback must always return a time that is higher than or equal to the passed \f(CI\*(C`now\*(C'\fI value\fR. .Sp This can be used to create very complex timers, such as a timer that triggers on \*(L"next midnight, local time\*(R". To do this, you would calculate the next midnight after \f(CW\*(C`now\*(C'\fR and return the timestamp value for this. Here is a (completely untested, no error checking) example on how to do this: .Sp .Vb 1 \& #include \& \& static ev_tstamp \& my_rescheduler (ev_periodic *w, ev_tstamp now) \& { \& time_t tnow = (time_t)now; \& struct tm tm; \& localtime_r (&tnow, &tm); \& \& tm.tm_sec = tm.tm_min = tm.tm_hour = 0; // midnight current day \& ++tm.tm_mday; // midnight next day \& \& return mktime (&tm); \& } .Ve .Sp Note: this code might run into trouble on days that have more then two midnights (beginning and end). .RE .RS 4 .RE .IP "ev_periodic_again (loop, ev_periodic *)" 4 .IX Item "ev_periodic_again (loop, ev_periodic *)" Simply stops and restarts the periodic watcher again. This is only useful when you changed some parameters or the reschedule callback would return a different time than the last time it was called (e.g. in a crond like program when the crontabs have changed). .IP "ev_tstamp ev_periodic_at (ev_periodic *)" 4 .IX Item "ev_tstamp ev_periodic_at (ev_periodic *)" When active, returns the absolute time that the watcher is supposed to trigger next. This is not the same as the \f(CW\*(C`offset\*(C'\fR argument to \&\f(CW\*(C`ev_periodic_set\*(C'\fR, but indeed works even in interval and manual rescheduling modes. .IP "ev_tstamp offset [read\-write]" 4 .IX Item "ev_tstamp offset [read-write]" When repeating, this contains the offset value, otherwise this is the absolute point in time (the \f(CW\*(C`offset\*(C'\fR value passed to \f(CW\*(C`ev_periodic_set\*(C'\fR, although libev might modify this value for better numerical stability). .Sp Can be modified any time, but changes only take effect when the periodic timer fires or \f(CW\*(C`ev_periodic_again\*(C'\fR is being called. .IP "ev_tstamp interval [read\-write]" 4 .IX Item "ev_tstamp interval [read-write]" The current interval value. Can be modified any time, but changes only take effect when the periodic timer fires or \f(CW\*(C`ev_periodic_again\*(C'\fR is being called. .IP "ev_tstamp (*reschedule_cb)(ev_periodic *w, ev_tstamp now) [read\-write]" 4 .IX Item "ev_tstamp (*reschedule_cb)(ev_periodic *w, ev_tstamp now) [read-write]" The current reschedule callback, or \f(CW0\fR, if this functionality is switched off. Can be changed any time, but changes only take effect when the periodic timer fires or \f(CW\*(C`ev_periodic_again\*(C'\fR is being called. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Call a callback every hour, or, more precisely, whenever the system time is divisible by 3600. The callback invocation times have potentially a lot of jitter, but good long-term stability. .PP .Vb 5 \& static void \& clock_cb (struct ev_loop *loop, ev_periodic *w, int revents) \& { \& ... its now a full hour (UTC, or TAI or whatever your clock follows) \& } \& \& ev_periodic hourly_tick; \& ev_periodic_init (&hourly_tick, clock_cb, 0., 3600., 0); \& ev_periodic_start (loop, &hourly_tick); .Ve .PP Example: The same as above, but use a reschedule callback to do it: .PP .Vb 1 \& #include \& \& static ev_tstamp \& my_scheduler_cb (ev_periodic *w, ev_tstamp now) \& { \& return now + (3600. \- fmod (now, 3600.)); \& } \& \& ev_periodic_init (&hourly_tick, clock_cb, 0., 0., my_scheduler_cb); .Ve .PP Example: Call a callback every hour, starting now: .PP .Vb 4 \& ev_periodic hourly_tick; \& ev_periodic_init (&hourly_tick, clock_cb, \& fmod (ev_now (loop), 3600.), 3600., 0); \& ev_periodic_start (loop, &hourly_tick); .Ve .ie n .SS """ev_signal"" \- signal me when a signal gets signalled!" .el .SS "\f(CWev_signal\fP \- signal me when a signal gets signalled!" .IX Subsection "ev_signal - signal me when a signal gets signalled!" Signal watchers will trigger an event when the process receives a specific signal one or more times. Even though signals are very asynchronous, libev will try its best to deliver signals synchronously, i.e. as part of the normal event processing, like any other event. .PP If you want signals to be delivered truly asynchronously, just use \&\f(CW\*(C`sigaction\*(C'\fR as you would do without libev and forget about sharing the signal. You can even use \f(CW\*(C`ev_async\*(C'\fR from a signal handler to synchronously wake up an event loop. .PP You can configure as many watchers as you like for the same signal, but only within the same loop, i.e. you can watch for \f(CW\*(C`SIGINT\*(C'\fR in your default loop and for \f(CW\*(C`SIGIO\*(C'\fR in another loop, but you cannot watch for \&\f(CW\*(C`SIGINT\*(C'\fR in both the default loop and another loop at the same time. At the moment, \f(CW\*(C`SIGCHLD\*(C'\fR is permanently tied to the default loop. .PP Only after the first watcher for a signal is started will libev actually register something with the kernel. It thus coexists with your own signal handlers as long as you don't register any with libev for the same signal. .PP If possible and supported, libev will install its handlers with \&\f(CW\*(C`SA_RESTART\*(C'\fR (or equivalent) behaviour enabled, so system calls should not be unduly interrupted. If you have a problem with system calls getting interrupted by signals you can block all signals in an \f(CW\*(C`ev_check\*(C'\fR watcher and unblock them in an \f(CW\*(C`ev_prepare\*(C'\fR watcher. .PP \fIThe special problem of inheritance over fork/execve/pthread_create\fR .IX Subsection "The special problem of inheritance over fork/execve/pthread_create" .PP Both the signal mask (\f(CW\*(C`sigprocmask\*(C'\fR) and the signal disposition (\f(CW\*(C`sigaction\*(C'\fR) are unspecified after starting a signal watcher (and after stopping it again), that is, libev might or might not block the signal, and might or might not set or restore the installed signal handler (but see \f(CW\*(C`EVFLAG_NOSIGMASK\*(C'\fR). .PP While this does not matter for the signal disposition (libev never sets signals to \f(CW\*(C`SIG_IGN\*(C'\fR, so handlers will be reset to \f(CW\*(C`SIG_DFL\*(C'\fR on \&\f(CW\*(C`execve\*(C'\fR), this matters for the signal mask: many programs do not expect certain signals to be blocked. .PP This means that before calling \f(CW\*(C`exec\*(C'\fR (from the child) you should reset the signal mask to whatever \*(L"default\*(R" you expect (all clear is a good choice usually). .PP The simplest way to ensure that the signal mask is reset in the child is to install a fork handler with \f(CW\*(C`pthread_atfork\*(C'\fR that resets it. That will catch fork calls done by libraries (such as the libc) as well. .PP In current versions of libev, the signal will not be blocked indefinitely unless you use the \f(CW\*(C`signalfd\*(C'\fR \s-1API\s0 (\f(CW\*(C`EV_SIGNALFD\*(C'\fR). While this reduces the window of opportunity for problems, it will not go away, as libev \&\fIhas\fR to modify the signal mask, at least temporarily. .PP So I can't stress this enough: \fIIf you do not reset your signal mask when you expect it to be empty, you have a race condition in your code\fR. This is not a libev-specific thing, this is true for most event libraries. .PP \fIThe special problem of threads signal handling\fR .IX Subsection "The special problem of threads signal handling" .PP \&\s-1POSIX\s0 threads has problematic signal handling semantics, specifically, a lot of functionality (sigfd, sigwait etc.) only really works if all threads in a process block signals, which is hard to achieve. .PP When you want to use sigwait (or mix libev signal handling with your own for the same signals), you can tackle this problem by globally blocking all signals before creating any threads (or creating them with a fully set sigprocmask) and also specifying the \f(CW\*(C`EVFLAG_NOSIGMASK\*(C'\fR when creating loops. Then designate one thread as \*(L"signal receiver thread\*(R" which handles these signals. You can pass on any signals that libev might be interested in by calling \f(CW\*(C`ev_feed_signal\*(C'\fR. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_signal_init (ev_signal *, callback, int signum)" 4 .IX Item "ev_signal_init (ev_signal *, callback, int signum)" .PD 0 .IP "ev_signal_set (ev_signal *, int signum)" 4 .IX Item "ev_signal_set (ev_signal *, int signum)" .PD Configures the watcher to trigger on the given signal number (usually one of the \f(CW\*(C`SIGxxx\*(C'\fR constants). .IP "int signum [read\-only]" 4 .IX Item "int signum [read-only]" The signal the watcher watches out for. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Try to exit cleanly on \s-1SIGINT.\s0 .PP .Vb 5 \& static void \& sigint_cb (struct ev_loop *loop, ev_signal *w, int revents) \& { \& ev_break (loop, EVBREAK_ALL); \& } \& \& ev_signal signal_watcher; \& ev_signal_init (&signal_watcher, sigint_cb, SIGINT); \& ev_signal_start (loop, &signal_watcher); .Ve .ie n .SS """ev_child"" \- watch out for process status changes" .el .SS "\f(CWev_child\fP \- watch out for process status changes" .IX Subsection "ev_child - watch out for process status changes" Child watchers trigger when your process receives a \s-1SIGCHLD\s0 in response to some child status changes (most typically when a child of yours dies or exits). It is permissible to install a child watcher \fIafter\fR the child has been forked (which implies it might have already exited), as long as the event loop isn't entered (or is continued from a watcher), i.e., forking and then immediately registering a watcher for the child is fine, but forking and registering a watcher a few event loop iterations later or in the next callback invocation is not. .PP Only the default event loop is capable of handling signals, and therefore you can only register child watchers in the default event loop. .PP Due to some design glitches inside libev, child watchers will always be handled at maximum priority (their priority is set to \f(CW\*(C`EV_MAXPRI\*(C'\fR by libev) .PP \fIProcess Interaction\fR .IX Subsection "Process Interaction" .PP Libev grabs \f(CW\*(C`SIGCHLD\*(C'\fR as soon as the default event loop is initialised. This is necessary to guarantee proper behaviour even if the first child watcher is started after the child exits. The occurrence of \f(CW\*(C`SIGCHLD\*(C'\fR is recorded asynchronously, but child reaping is done synchronously as part of the event loop processing. Libev always reaps all children, even ones not watched. .PP \fIOverriding the Built-In Processing\fR .IX Subsection "Overriding the Built-In Processing" .PP Libev offers no special support for overriding the built-in child processing, but if your application collides with libev's default child handler, you can override it easily by installing your own handler for \&\f(CW\*(C`SIGCHLD\*(C'\fR after initialising the default loop, and making sure the default loop never gets destroyed. You are encouraged, however, to use an event-based approach to child reaping and thus use libev's support for that, so other libev users can use \f(CW\*(C`ev_child\*(C'\fR watchers freely. .PP \fIStopping the Child Watcher\fR .IX Subsection "Stopping the Child Watcher" .PP Currently, the child watcher never gets stopped, even when the child terminates, so normally one needs to stop the watcher in the callback. Future versions of libev might stop the watcher automatically when a child exit is detected (calling \f(CW\*(C`ev_child_stop\*(C'\fR twice is not a problem). .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_child_init (ev_child *, callback, int pid, int trace)" 4 .IX Item "ev_child_init (ev_child *, callback, int pid, int trace)" .PD 0 .IP "ev_child_set (ev_child *, int pid, int trace)" 4 .IX Item "ev_child_set (ev_child *, int pid, int trace)" .PD Configures the watcher to wait for status changes of process \f(CW\*(C`pid\*(C'\fR (or \&\fIany\fR process if \f(CW\*(C`pid\*(C'\fR is specified as \f(CW0\fR). The callback can look at the \f(CW\*(C`rstatus\*(C'\fR member of the \f(CW\*(C`ev_child\*(C'\fR watcher structure to see the status word (use the macros from \f(CW\*(C`sys/wait.h\*(C'\fR and see your systems \&\f(CW\*(C`waitpid\*(C'\fR documentation). The \f(CW\*(C`rpid\*(C'\fR member contains the pid of the process causing the status change. \f(CW\*(C`trace\*(C'\fR must be either \f(CW0\fR (only activate the watcher when the process terminates) or \f(CW1\fR (additionally activate the watcher when the process is stopped or continued). .IP "int pid [read\-only]" 4 .IX Item "int pid [read-only]" The process id this watcher watches out for, or \f(CW0\fR, meaning any process id. .IP "int rpid [read\-write]" 4 .IX Item "int rpid [read-write]" The process id that detected a status change. .IP "int rstatus [read\-write]" 4 .IX Item "int rstatus [read-write]" The process exit/trace status caused by \f(CW\*(C`rpid\*(C'\fR (see your systems \&\f(CW\*(C`waitpid\*(C'\fR and \f(CW\*(C`sys/wait.h\*(C'\fR documentation for details). .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: \f(CW\*(C`fork()\*(C'\fR a new process and install a child handler to wait for its completion. .PP .Vb 1 \& ev_child cw; \& \& static void \& child_cb (EV_P_ ev_child *w, int revents) \& { \& ev_child_stop (EV_A_ w); \& printf ("process %d exited with status %x\en", w\->rpid, w\->rstatus); \& } \& \& pid_t pid = fork (); \& \& if (pid < 0) \& // error \& else if (pid == 0) \& { \& // the forked child executes here \& exit (1); \& } \& else \& { \& ev_child_init (&cw, child_cb, pid, 0); \& ev_child_start (EV_DEFAULT_ &cw); \& } .Ve .ie n .SS """ev_stat"" \- did the file attributes just change?" .el .SS "\f(CWev_stat\fP \- did the file attributes just change?" .IX Subsection "ev_stat - did the file attributes just change?" This watches a file system path for attribute changes. That is, it calls \&\f(CW\*(C`stat\*(C'\fR on that path in regular intervals (or when the \s-1OS\s0 says it changed) and sees if it changed compared to the last time, invoking the callback if it did. Starting the watcher \f(CW\*(C`stat\*(C'\fR's the file, so only changes that happen after the watcher has been started will be reported. .PP The path does not need to exist: changing from \*(L"path exists\*(R" to \*(L"path does not exist\*(R" is a status change like any other. The condition \*(L"path does not exist\*(R" (or more correctly \*(L"path cannot be stat'ed\*(R") is signified by the \&\f(CW\*(C`st_nlink\*(C'\fR field being zero (which is otherwise always forced to be at least one) and all the other fields of the stat buffer having unspecified contents. .PP The path \fImust not\fR end in a slash or contain special components such as \&\f(CW\*(C`.\*(C'\fR or \f(CW\*(C`..\*(C'\fR. The path \fIshould\fR be absolute: If it is relative and your working directory changes, then the behaviour is undefined. .PP Since there is no portable change notification interface available, the portable implementation simply calls \f(CWstat(2)\fR regularly on the path to see if it changed somehow. You can specify a recommended polling interval for this case. If you specify a polling interval of \f(CW0\fR (highly recommended!) then a \fIsuitable, unspecified default\fR value will be used (which you can expect to be around five seconds, although this might change dynamically). Libev will also impose a minimum interval which is currently around \f(CW0.1\fR, but that's usually overkill. .PP This watcher type is not meant for massive numbers of stat watchers, as even with OS-supported change notifications, this can be resource-intensive. .PP At the time of this writing, the only OS-specific interface implemented is the Linux inotify interface (implementing kqueue support is left as an exercise for the reader. Note, however, that the author sees no way of implementing \f(CW\*(C`ev_stat\*(C'\fR semantics with kqueue, except as a hint). .PP \fI\s-1ABI\s0 Issues (Largefile Support)\fR .IX Subsection "ABI Issues (Largefile Support)" .PP Libev by default (unless the user overrides this) uses the default compilation environment, which means that on systems with large file support disabled by default, you get the 32 bit version of the stat structure. When using the library from programs that change the \s-1ABI\s0 to use 64 bit file offsets the programs will fail. In that case you have to compile libev with the same flags to get binary compatibility. This is obviously the case with any flags that change the \s-1ABI,\s0 but the problem is most noticeably displayed with ev_stat and large file support. .PP The solution for this is to lobby your distribution maker to make large file interfaces available by default (as e.g. FreeBSD does) and not optional. Libev cannot simply switch on large file support because it has to exchange stat structures with application programs compiled using the default compilation environment. .PP \fIInotify and Kqueue\fR .IX Subsection "Inotify and Kqueue" .PP When \f(CW\*(C`inotify (7)\*(C'\fR support has been compiled into libev and present at runtime, it will be used to speed up change detection where possible. The inotify descriptor will be created lazily when the first \f(CW\*(C`ev_stat\*(C'\fR watcher is being started. .PP Inotify presence does not change the semantics of \f(CW\*(C`ev_stat\*(C'\fR watchers except that changes might be detected earlier, and in some cases, to avoid making regular \f(CW\*(C`stat\*(C'\fR calls. Even in the presence of inotify support there are many cases where libev has to resort to regular \f(CW\*(C`stat\*(C'\fR polling, but as long as kernel 2.6.25 or newer is used (2.6.24 and older have too many bugs), the path exists (i.e. stat succeeds), and the path resides on a local filesystem (libev currently assumes only ext2/3, jfs, reiserfs and xfs are fully working) libev usually gets away without polling. .PP There is no support for kqueue, as apparently it cannot be used to implement this functionality, due to the requirement of having a file descriptor open on the object at all times, and detecting renames, unlinks etc. is difficult. .PP \fI\f(CI\*(C`stat ()\*(C'\fI is a synchronous operation\fR .IX Subsection "stat () is a synchronous operation" .PP Libev doesn't normally do any kind of I/O itself, and so is not blocking the process. The exception are \f(CW\*(C`ev_stat\*(C'\fR watchers \- those call \f(CW\*(C`stat ()\*(C'\fR, which is a synchronous operation. .PP For local paths, this usually doesn't matter: unless the system is very busy or the intervals between stat's are large, a stat call will be fast, as the path data is usually in memory already (except when starting the watcher). .PP For networked file systems, calling \f(CW\*(C`stat ()\*(C'\fR can block an indefinite time due to network issues, and even under good conditions, a stat call often takes multiple milliseconds. .PP Therefore, it is best to avoid using \f(CW\*(C`ev_stat\*(C'\fR watchers on networked paths, although this is fully supported by libev. .PP \fIThe special problem of stat time resolution\fR .IX Subsection "The special problem of stat time resolution" .PP The \f(CW\*(C`stat ()\*(C'\fR system call only supports full-second resolution portably, and even on systems where the resolution is higher, most file systems still only support whole seconds. .PP That means that, if the time is the only thing that changes, you can easily miss updates: on the first update, \f(CW\*(C`ev_stat\*(C'\fR detects a change and calls your callback, which does something. When there is another update within the same second, \f(CW\*(C`ev_stat\*(C'\fR will be unable to detect unless the stat data does change in other ways (e.g. file size). .PP The solution to this is to delay acting on a change for slightly more than a second (or till slightly after the next full second boundary), using a roughly one-second-delay \f(CW\*(C`ev_timer\*(C'\fR (e.g. \f(CW\*(C`ev_timer_set (w, 0., 1.02); ev_timer_again (loop, w)\*(C'\fR). .PP The \f(CW.02\fR offset is added to work around small timing inconsistencies of some operating systems (where the second counter of the current time might be be delayed. One such system is the Linux kernel, where a call to \&\f(CW\*(C`gettimeofday\*(C'\fR might return a timestamp with a full second later than a subsequent \f(CW\*(C`time\*(C'\fR call \- if the equivalent of \f(CW\*(C`time ()\*(C'\fR is used to update file times then there will be a small window where the kernel uses the previous second to update file times but libev might already execute the timer callback). .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_stat_init (ev_stat *, callback, const char *path, ev_tstamp interval)" 4 .IX Item "ev_stat_init (ev_stat *, callback, const char *path, ev_tstamp interval)" .PD 0 .IP "ev_stat_set (ev_stat *, const char *path, ev_tstamp interval)" 4 .IX Item "ev_stat_set (ev_stat *, const char *path, ev_tstamp interval)" .PD Configures the watcher to wait for status changes of the given \&\f(CW\*(C`path\*(C'\fR. The \f(CW\*(C`interval\*(C'\fR is a hint on how quickly a change is expected to be detected and should normally be specified as \f(CW0\fR to let libev choose a suitable value. The memory pointed to by \f(CW\*(C`path\*(C'\fR must point to the same path for as long as the watcher is active. .Sp The callback will receive an \f(CW\*(C`EV_STAT\*(C'\fR event when a change was detected, relative to the attributes at the time the watcher was started (or the last change was detected). .IP "ev_stat_stat (loop, ev_stat *)" 4 .IX Item "ev_stat_stat (loop, ev_stat *)" Updates the stat buffer immediately with new values. If you change the watched path in your callback, you could call this function to avoid detecting this change (while introducing a race condition if you are not the only one changing the path). Can also be useful simply to find out the new values. .IP "ev_statdata attr [read\-only]" 4 .IX Item "ev_statdata attr [read-only]" The most-recently detected attributes of the file. Although the type is \&\f(CW\*(C`ev_statdata\*(C'\fR, this is usually the (or one of the) \f(CW\*(C`struct stat\*(C'\fR types suitable for your system, but you can only rely on the POSIX-standardised members to be present. If the \f(CW\*(C`st_nlink\*(C'\fR member is \f(CW0\fR, then there was some error while \f(CW\*(C`stat\*(C'\fRing the file. .IP "ev_statdata prev [read\-only]" 4 .IX Item "ev_statdata prev [read-only]" The previous attributes of the file. The callback gets invoked whenever \&\f(CW\*(C`prev\*(C'\fR != \f(CW\*(C`attr\*(C'\fR, or, more precisely, one or more of these members differ: \f(CW\*(C`st_dev\*(C'\fR, \f(CW\*(C`st_ino\*(C'\fR, \f(CW\*(C`st_mode\*(C'\fR, \f(CW\*(C`st_nlink\*(C'\fR, \f(CW\*(C`st_uid\*(C'\fR, \&\f(CW\*(C`st_gid\*(C'\fR, \f(CW\*(C`st_rdev\*(C'\fR, \f(CW\*(C`st_size\*(C'\fR, \f(CW\*(C`st_atime\*(C'\fR, \f(CW\*(C`st_mtime\*(C'\fR, \f(CW\*(C`st_ctime\*(C'\fR. .IP "ev_tstamp interval [read\-only]" 4 .IX Item "ev_tstamp interval [read-only]" The specified interval. .IP "const char *path [read\-only]" 4 .IX Item "const char *path [read-only]" The file system path that is being watched. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Watch \f(CW\*(C`/etc/passwd\*(C'\fR for attribute changes. .PP .Vb 10 \& static void \& passwd_cb (struct ev_loop *loop, ev_stat *w, int revents) \& { \& /* /etc/passwd changed in some way */ \& if (w\->attr.st_nlink) \& { \& printf ("passwd current size %ld\en", (long)w\->attr.st_size); \& printf ("passwd current atime %ld\en", (long)w\->attr.st_mtime); \& printf ("passwd current mtime %ld\en", (long)w\->attr.st_mtime); \& } \& else \& /* you shalt not abuse printf for puts */ \& puts ("wow, /etc/passwd is not there, expect problems. " \& "if this is windows, they already arrived\en"); \& } \& \& ... \& ev_stat passwd; \& \& ev_stat_init (&passwd, passwd_cb, "/etc/passwd", 0.); \& ev_stat_start (loop, &passwd); .Ve .PP Example: Like above, but additionally use a one-second delay so we do not miss updates (however, frequent updates will delay processing, too, so one might do the work both on \f(CW\*(C`ev_stat\*(C'\fR callback invocation \fIand\fR on \&\f(CW\*(C`ev_timer\*(C'\fR callback invocation). .PP .Vb 2 \& static ev_stat passwd; \& static ev_timer timer; \& \& static void \& timer_cb (EV_P_ ev_timer *w, int revents) \& { \& ev_timer_stop (EV_A_ w); \& \& /* now it\*(Aqs one second after the most recent passwd change */ \& } \& \& static void \& stat_cb (EV_P_ ev_stat *w, int revents) \& { \& /* reset the one\-second timer */ \& ev_timer_again (EV_A_ &timer); \& } \& \& ... \& ev_stat_init (&passwd, stat_cb, "/etc/passwd", 0.); \& ev_stat_start (loop, &passwd); \& ev_timer_init (&timer, timer_cb, 0., 1.02); .Ve .ie n .SS """ev_idle"" \- when you've got nothing better to do..." .el .SS "\f(CWev_idle\fP \- when you've got nothing better to do..." .IX Subsection "ev_idle - when you've got nothing better to do..." Idle watchers trigger events when no other events of the same or higher priority are pending (prepare, check and other idle watchers do not count as receiving \*(L"events\*(R"). .PP That is, as long as your process is busy handling sockets or timeouts (or even signals, imagine) of the same or higher priority it will not be triggered. But when your process is idle (or only lower-priority watchers are pending), the idle watchers are being called once per event loop iteration \- until stopped, that is, or your process receives more events and becomes busy again with higher priority stuff. .PP The most noteworthy effect is that as long as any idle watchers are active, the process will not block when waiting for new events. .PP Apart from keeping your process non-blocking (which is a useful effect on its own sometimes), idle watchers are a good place to do \&\*(L"pseudo-background processing\*(R", or delay processing stuff to after the event loop has handled all outstanding events. .PP \fIAbusing an \f(CI\*(C`ev_idle\*(C'\fI watcher for its side-effect\fR .IX Subsection "Abusing an ev_idle watcher for its side-effect" .PP As long as there is at least one active idle watcher, libev will never sleep unnecessarily. Or in other words, it will loop as fast as possible. For this to work, the idle watcher doesn't need to be invoked at all \- the lowest priority will do. .PP This mode of operation can be useful together with an \f(CW\*(C`ev_check\*(C'\fR watcher, to do something on each event loop iteration \- for example to balance load between different connections. .PP See \*(L"Abusing an ev_check watcher for its side-effect\*(R" for a longer example. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_idle_init (ev_idle *, callback)" 4 .IX Item "ev_idle_init (ev_idle *, callback)" Initialises and configures the idle watcher \- it has no parameters of any kind. There is a \f(CW\*(C`ev_idle_set\*(C'\fR macro, but using it is utterly pointless, believe me. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Dynamically allocate an \f(CW\*(C`ev_idle\*(C'\fR watcher, start it, and in the callback, free it. Also, use no error checking, as usual. .PP .Vb 5 \& static void \& idle_cb (struct ev_loop *loop, ev_idle *w, int revents) \& { \& // stop the watcher \& ev_idle_stop (loop, w); \& \& // now we can free it \& free (w); \& \& // now do something you wanted to do when the program has \& // no longer anything immediate to do. \& } \& \& ev_idle *idle_watcher = malloc (sizeof (ev_idle)); \& ev_idle_init (idle_watcher, idle_cb); \& ev_idle_start (loop, idle_watcher); .Ve .ie n .SS """ev_prepare"" and ""ev_check"" \- customise your event loop!" .el .SS "\f(CWev_prepare\fP and \f(CWev_check\fP \- customise your event loop!" .IX Subsection "ev_prepare and ev_check - customise your event loop!" Prepare and check watchers are often (but not always) used in pairs: prepare watchers get invoked before the process blocks and check watchers afterwards. .PP You \fImust not\fR call \f(CW\*(C`ev_run\*(C'\fR (or similar functions that enter the current event loop) or \f(CW\*(C`ev_loop_fork\*(C'\fR from either \f(CW\*(C`ev_prepare\*(C'\fR or \&\f(CW\*(C`ev_check\*(C'\fR watchers. Other loops than the current one are fine, however. The rationale behind this is that you do not need to check for recursion in those watchers, i.e. the sequence will always be \&\f(CW\*(C`ev_prepare\*(C'\fR, blocking, \f(CW\*(C`ev_check\*(C'\fR so if you have one watcher of each kind they will always be called in pairs bracketing the blocking call. .PP Their main purpose is to integrate other event mechanisms into libev and their use is somewhat advanced. They could be used, for example, to track variable changes, implement your own watchers, integrate net-snmp or a coroutine library and lots more. They are also occasionally useful if you cache some data and want to flush it before blocking (for example, in X programs you might want to do an \f(CW\*(C`XFlush ()\*(C'\fR in an \f(CW\*(C`ev_prepare\*(C'\fR watcher). .PP This is done by examining in each prepare call which file descriptors need to be watched by the other library, registering \f(CW\*(C`ev_io\*(C'\fR watchers for them and starting an \f(CW\*(C`ev_timer\*(C'\fR watcher for any timeouts (many libraries provide exactly this functionality). Then, in the check watcher, you check for any events that occurred (by checking the pending status of all watchers and stopping them) and call back into the library. The I/O and timer callbacks will never actually be called (but must be valid nevertheless, because you never know, you know?). .PP As another example, the Perl Coro module uses these hooks to integrate coroutines into libev programs, by yielding to other active coroutines during each prepare and only letting the process block if no coroutines are ready to run (it's actually more complicated: it only runs coroutines with priority higher than or equal to the event loop and one coroutine of lower priority, but only once, using idle watchers to keep the event loop from blocking if lower-priority coroutines are active, thus mapping low-priority coroutines to idle/background tasks). .PP When used for this purpose, it is recommended to give \f(CW\*(C`ev_check\*(C'\fR watchers highest (\f(CW\*(C`EV_MAXPRI\*(C'\fR) priority, to ensure that they are being run before any other watchers after the poll (this doesn't matter for \f(CW\*(C`ev_prepare\*(C'\fR watchers). .PP Also, \f(CW\*(C`ev_check\*(C'\fR watchers (and \f(CW\*(C`ev_prepare\*(C'\fR watchers, too) should not activate (\*(L"feed\*(R") events into libev. While libev fully supports this, they might get executed before other \f(CW\*(C`ev_check\*(C'\fR watchers did their job. As \&\f(CW\*(C`ev_check\*(C'\fR watchers are often used to embed other (non-libev) event loops those other event loops might be in an unusable state until their \&\f(CW\*(C`ev_check\*(C'\fR watcher ran (always remind yourself to coexist peacefully with others). .PP \fIAbusing an \f(CI\*(C`ev_check\*(C'\fI watcher for its side-effect\fR .IX Subsection "Abusing an ev_check watcher for its side-effect" .PP \&\f(CW\*(C`ev_check\*(C'\fR (and less often also \f(CW\*(C`ev_prepare\*(C'\fR) watchers can also be useful because they are called once per event loop iteration. For example, if you want to handle a large number of connections fairly, you normally only do a bit of work for each active connection, and if there is more work to do, you wait for the next event loop iteration, so other connections have a chance of making progress. .PP Using an \f(CW\*(C`ev_check\*(C'\fR watcher is almost enough: it will be called on the next event loop iteration. However, that isn't as soon as possible \- without external events, your \f(CW\*(C`ev_check\*(C'\fR watcher will not be invoked. .PP This is where \f(CW\*(C`ev_idle\*(C'\fR watchers come in handy \- all you need is a single global idle watcher that is active as long as you have one active \&\f(CW\*(C`ev_check\*(C'\fR watcher. The \f(CW\*(C`ev_idle\*(C'\fR watcher makes sure the event loop will not sleep, and the \f(CW\*(C`ev_check\*(C'\fR watcher makes sure a callback gets invoked. Neither watcher alone can do that. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_prepare_init (ev_prepare *, callback)" 4 .IX Item "ev_prepare_init (ev_prepare *, callback)" .PD 0 .IP "ev_check_init (ev_check *, callback)" 4 .IX Item "ev_check_init (ev_check *, callback)" .PD Initialises and configures the prepare or check watcher \- they have no parameters of any kind. There are \f(CW\*(C`ev_prepare_set\*(C'\fR and \f(CW\*(C`ev_check_set\*(C'\fR macros, but using them is utterly, utterly, utterly and completely pointless. .PP \fIExamples\fR .IX Subsection "Examples" .PP There are a number of principal ways to embed other event loops or modules into libev. Here are some ideas on how to include libadns into libev (there is a Perl module named \f(CW\*(C`EV::ADNS\*(C'\fR that does this, which you could use as a working example. Another Perl module named \f(CW\*(C`EV::Glib\*(C'\fR embeds a Glib main context into libev, and finally, \f(CW\*(C`Glib::EV\*(C'\fR embeds \s-1EV\s0 into the Glib event loop). .PP Method 1: Add \s-1IO\s0 watchers and a timeout watcher in a prepare handler, and in a check watcher, destroy them and call into libadns. What follows is pseudo-code only of course. This requires you to either use a low priority for the check watcher or use \f(CW\*(C`ev_clear_pending\*(C'\fR explicitly, as the callbacks for the IO/timeout watchers might not have been called yet. .PP .Vb 2 \& static ev_io iow [nfd]; \& static ev_timer tw; \& \& static void \& io_cb (struct ev_loop *loop, ev_io *w, int revents) \& { \& } \& \& // create io watchers for each fd and a timer before blocking \& static void \& adns_prepare_cb (struct ev_loop *loop, ev_prepare *w, int revents) \& { \& int timeout = 3600000; \& struct pollfd fds [nfd]; \& // actual code will need to loop here and realloc etc. \& adns_beforepoll (ads, fds, &nfd, &timeout, timeval_from (ev_time ())); \& \& /* the callback is illegal, but won\*(Aqt be called as we stop during check */ \& ev_timer_init (&tw, 0, timeout * 1e\-3, 0.); \& ev_timer_start (loop, &tw); \& \& // create one ev_io per pollfd \& for (int i = 0; i < nfd; ++i) \& { \& ev_io_init (iow + i, io_cb, fds [i].fd, \& ((fds [i].events & POLLIN ? EV_READ : 0) \& | (fds [i].events & POLLOUT ? EV_WRITE : 0))); \& \& fds [i].revents = 0; \& ev_io_start (loop, iow + i); \& } \& } \& \& // stop all watchers after blocking \& static void \& adns_check_cb (struct ev_loop *loop, ev_check *w, int revents) \& { \& ev_timer_stop (loop, &tw); \& \& for (int i = 0; i < nfd; ++i) \& { \& // set the relevant poll flags \& // could also call adns_processreadable etc. here \& struct pollfd *fd = fds + i; \& int revents = ev_clear_pending (iow + i); \& if (revents & EV_READ ) fd\->revents |= fd\->events & POLLIN; \& if (revents & EV_WRITE) fd\->revents |= fd\->events & POLLOUT; \& \& // now stop the watcher \& ev_io_stop (loop, iow + i); \& } \& \& adns_afterpoll (adns, fds, nfd, timeval_from (ev_now (loop)); \& } .Ve .PP Method 2: This would be just like method 1, but you run \f(CW\*(C`adns_afterpoll\*(C'\fR in the prepare watcher and would dispose of the check watcher. .PP Method 3: If the module to be embedded supports explicit event notification (libadns does), you can also make use of the actual watcher callbacks, and only destroy/create the watchers in the prepare watcher. .PP .Vb 5 \& static void \& timer_cb (EV_P_ ev_timer *w, int revents) \& { \& adns_state ads = (adns_state)w\->data; \& update_now (EV_A); \& \& adns_processtimeouts (ads, &tv_now); \& } \& \& static void \& io_cb (EV_P_ ev_io *w, int revents) \& { \& adns_state ads = (adns_state)w\->data; \& update_now (EV_A); \& \& if (revents & EV_READ ) adns_processreadable (ads, w\->fd, &tv_now); \& if (revents & EV_WRITE) adns_processwriteable (ads, w\->fd, &tv_now); \& } \& \& // do not ever call adns_afterpoll .Ve .PP Method 4: Do not use a prepare or check watcher because the module you want to embed is not flexible enough to support it. Instead, you can override their poll function. The drawback with this solution is that the main loop is now no longer controllable by \s-1EV.\s0 The \f(CW\*(C`Glib::EV\*(C'\fR module uses this approach, effectively embedding \s-1EV\s0 as a client into the horrible libglib event loop. .PP .Vb 4 \& static gint \& event_poll_func (GPollFD *fds, guint nfds, gint timeout) \& { \& int got_events = 0; \& \& for (n = 0; n < nfds; ++n) \& // create/start io watcher that sets the relevant bits in fds[n] and increment got_events \& \& if (timeout >= 0) \& // create/start timer \& \& // poll \& ev_run (EV_A_ 0); \& \& // stop timer again \& if (timeout >= 0) \& ev_timer_stop (EV_A_ &to); \& \& // stop io watchers again \- their callbacks should have set \& for (n = 0; n < nfds; ++n) \& ev_io_stop (EV_A_ iow [n]); \& \& return got_events; \& } .Ve .ie n .SS """ev_embed"" \- when one backend isn't enough..." .el .SS "\f(CWev_embed\fP \- when one backend isn't enough..." .IX Subsection "ev_embed - when one backend isn't enough..." This is a rather advanced watcher type that lets you embed one event loop into another (currently only \f(CW\*(C`ev_io\*(C'\fR events are supported in the embedded loop, other types of watchers might be handled in a delayed or incorrect fashion and must not be used). .PP There are primarily two reasons you would want that: work around bugs and prioritise I/O. .PP As an example for a bug workaround, the kqueue backend might only support sockets on some platform, so it is unusable as generic backend, but you still want to make use of it because you have many sockets and it scales so nicely. In this case, you would create a kqueue-based loop and embed it into your default loop (which might use e.g. poll). Overall operation will be a bit slower because first libev has to call \f(CW\*(C`poll\*(C'\fR and then \&\f(CW\*(C`kevent\*(C'\fR, but at least you can use both mechanisms for what they are best: \f(CW\*(C`kqueue\*(C'\fR for scalable sockets and \f(CW\*(C`poll\*(C'\fR if you want it to work :) .PP As for prioritising I/O: under rare circumstances you have the case where some fds have to be watched and handled very quickly (with low latency), and even priorities and idle watchers might have too much overhead. In this case you would put all the high priority stuff in one loop and all the rest in a second one, and embed the second one in the first. .PP As long as the watcher is active, the callback will be invoked every time there might be events pending in the embedded loop. The callback must then call \f(CW\*(C`ev_embed_sweep (mainloop, watcher)\*(C'\fR to make a single sweep and invoke their callbacks (the callback doesn't need to invoke the \&\f(CW\*(C`ev_embed_sweep\*(C'\fR function directly, it could also start an idle watcher to give the embedded loop strictly lower priority for example). .PP You can also set the callback to \f(CW0\fR, in which case the embed watcher will automatically execute the embedded loop sweep whenever necessary. .PP Fork detection will be handled transparently while the \f(CW\*(C`ev_embed\*(C'\fR watcher is active, i.e., the embedded loop will automatically be forked when the embedding loop forks. In other cases, the user is responsible for calling \&\f(CW\*(C`ev_loop_fork\*(C'\fR on the embedded loop. .PP Unfortunately, not all backends are embeddable: only the ones returned by \&\f(CW\*(C`ev_embeddable_backends\*(C'\fR are, which, unfortunately, does not include any portable one. .PP So when you want to use this feature you will always have to be prepared that you cannot get an embeddable loop. The recommended way to get around this is to have a separate variables for your embeddable loop, try to create it, and if that fails, use the normal loop for everything. .PP \fI\f(CI\*(C`ev_embed\*(C'\fI and fork\fR .IX Subsection "ev_embed and fork" .PP While the \f(CW\*(C`ev_embed\*(C'\fR watcher is running, forks in the embedding loop will automatically be applied to the embedded loop as well, so no special fork handling is required in that case. When the watcher is not running, however, it is still the task of the libev user to call \f(CW\*(C`ev_loop_fork ()\*(C'\fR as applicable. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_embed_init (ev_embed *, callback, struct ev_loop *embedded_loop)" 4 .IX Item "ev_embed_init (ev_embed *, callback, struct ev_loop *embedded_loop)" .PD 0 .IP "ev_embed_set (ev_embed *, struct ev_loop *embedded_loop)" 4 .IX Item "ev_embed_set (ev_embed *, struct ev_loop *embedded_loop)" .PD Configures the watcher to embed the given loop, which must be embeddable. If the callback is \f(CW0\fR, then \f(CW\*(C`ev_embed_sweep\*(C'\fR will be invoked automatically, otherwise it is the responsibility of the callback to invoke it (it will continue to be called until the sweep has been done, if you do not want that, you need to temporarily stop the embed watcher). .IP "ev_embed_sweep (loop, ev_embed *)" 4 .IX Item "ev_embed_sweep (loop, ev_embed *)" Make a single, non-blocking sweep over the embedded loop. This works similarly to \f(CW\*(C`ev_run (embedded_loop, EVRUN_NOWAIT)\*(C'\fR, but in the most appropriate way for embedded loops. .IP "struct ev_loop *other [read\-only]" 4 .IX Item "struct ev_loop *other [read-only]" The embedded event loop. .PP \fIExamples\fR .IX Subsection "Examples" .PP Example: Try to get an embeddable event loop and embed it into the default event loop. If that is not possible, use the default loop. The default loop is stored in \f(CW\*(C`loop_hi\*(C'\fR, while the embeddable loop is stored in \&\f(CW\*(C`loop_lo\*(C'\fR (which is \f(CW\*(C`loop_hi\*(C'\fR in the case no embeddable loop can be used). .PP .Vb 3 \& struct ev_loop *loop_hi = ev_default_init (0); \& struct ev_loop *loop_lo = 0; \& ev_embed embed; \& \& // see if there is a chance of getting one that works \& // (remember that a flags value of 0 means autodetection) \& loop_lo = ev_embeddable_backends () & ev_recommended_backends () \& ? ev_loop_new (ev_embeddable_backends () & ev_recommended_backends ()) \& : 0; \& \& // if we got one, then embed it, otherwise default to loop_hi \& if (loop_lo) \& { \& ev_embed_init (&embed, 0, loop_lo); \& ev_embed_start (loop_hi, &embed); \& } \& else \& loop_lo = loop_hi; .Ve .PP Example: Check if kqueue is available but not recommended and create a kqueue backend for use with sockets (which usually work with any kqueue implementation). Store the kqueue/socket\-only event loop in \&\f(CW\*(C`loop_socket\*(C'\fR. (One might optionally use \f(CW\*(C`EVFLAG_NOENV\*(C'\fR, too). .PP .Vb 3 \& struct ev_loop *loop = ev_default_init (0); \& struct ev_loop *loop_socket = 0; \& ev_embed embed; \& \& if (ev_supported_backends () & ~ev_recommended_backends () & EVBACKEND_KQUEUE) \& if ((loop_socket = ev_loop_new (EVBACKEND_KQUEUE)) \& { \& ev_embed_init (&embed, 0, loop_socket); \& ev_embed_start (loop, &embed); \& } \& \& if (!loop_socket) \& loop_socket = loop; \& \& // now use loop_socket for all sockets, and loop for everything else .Ve .ie n .SS """ev_fork"" \- the audacity to resume the event loop after a fork" .el .SS "\f(CWev_fork\fP \- the audacity to resume the event loop after a fork" .IX Subsection "ev_fork - the audacity to resume the event loop after a fork" Fork watchers are called when a \f(CW\*(C`fork ()\*(C'\fR was detected (usually because whoever is a good citizen cared to tell libev about it by calling \&\f(CW\*(C`ev_loop_fork\*(C'\fR). The invocation is done before the event loop blocks next and before \f(CW\*(C`ev_check\*(C'\fR watchers are being called, and only in the child after the fork. If whoever good citizen calling \f(CW\*(C`ev_default_fork\*(C'\fR cheats and calls it in the wrong process, the fork handlers will be invoked, too, of course. .PP \fIThe special problem of life after fork \- how is it possible?\fR .IX Subsection "The special problem of life after fork - how is it possible?" .PP Most uses of \f(CW\*(C`fork ()\*(C'\fR consist of forking, then some simple calls to set up/change the process environment, followed by a call to \f(CW\*(C`exec()\*(C'\fR. This sequence should be handled by libev without any problems. .PP This changes when the application actually wants to do event handling in the child, or both parent in child, in effect \*(L"continuing\*(R" after the fork. .PP The default mode of operation (for libev, with application help to detect forks) is to duplicate all the state in the child, as would be expected when \fIeither\fR the parent \fIor\fR the child process continues. .PP When both processes want to continue using libev, then this is usually the wrong result. In that case, usually one process (typically the parent) is supposed to continue with all watchers in place as before, while the other process typically wants to start fresh, i.e. without any active watchers. .PP The cleanest and most efficient way to achieve that with libev is to simply create a new event loop, which of course will be \*(L"empty\*(R", and use that for new watchers. This has the advantage of not touching more memory than necessary, and thus avoiding the copy-on-write, and the disadvantage of having to use multiple event loops (which do not support signal watchers). .PP When this is not possible, or you want to use the default loop for other reasons, then in the process that wants to start \*(L"fresh\*(R", call \&\f(CW\*(C`ev_loop_destroy (EV_DEFAULT)\*(C'\fR followed by \f(CW\*(C`ev_default_loop (...)\*(C'\fR. Destroying the default loop will \*(L"orphan\*(R" (not stop) all registered watchers, so you have to be careful not to execute code that modifies those watchers. Note also that in that case, you have to re-register any signal watchers. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_fork_init (ev_fork *, callback)" 4 .IX Item "ev_fork_init (ev_fork *, callback)" Initialises and configures the fork watcher \- it has no parameters of any kind. There is a \f(CW\*(C`ev_fork_set\*(C'\fR macro, but using it is utterly pointless, really. .ie n .SS """ev_cleanup"" \- even the best things end" .el .SS "\f(CWev_cleanup\fP \- even the best things end" .IX Subsection "ev_cleanup - even the best things end" Cleanup watchers are called just before the event loop is being destroyed by a call to \f(CW\*(C`ev_loop_destroy\*(C'\fR. .PP While there is no guarantee that the event loop gets destroyed, cleanup watchers provide a convenient method to install cleanup hooks for your program, worker threads and so on \- you just to make sure to destroy the loop when you want them to be invoked. .PP Cleanup watchers are invoked in the same way as any other watcher. Unlike all other watchers, they do not keep a reference to the event loop (which makes a lot of sense if you think about it). Like all other watchers, you can call libev functions in the callback, except \f(CW\*(C`ev_cleanup_start\*(C'\fR. .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_cleanup_init (ev_cleanup *, callback)" 4 .IX Item "ev_cleanup_init (ev_cleanup *, callback)" Initialises and configures the cleanup watcher \- it has no parameters of any kind. There is a \f(CW\*(C`ev_cleanup_set\*(C'\fR macro, but using it is utterly pointless, I assure you. .PP Example: Register an atexit handler to destroy the default loop, so any cleanup functions are called. .PP .Vb 5 \& static void \& program_exits (void) \& { \& ev_loop_destroy (EV_DEFAULT_UC); \& } \& \& ... \& atexit (program_exits); .Ve .ie n .SS """ev_async"" \- how to wake up an event loop" .el .SS "\f(CWev_async\fP \- how to wake up an event loop" .IX Subsection "ev_async - how to wake up an event loop" In general, you cannot use an \f(CW\*(C`ev_loop\*(C'\fR from multiple threads or other asynchronous sources such as signal handlers (as opposed to multiple event loops \- those are of course safe to use in different threads). .PP Sometimes, however, you need to wake up an event loop you do not control, for example because it belongs to another thread. This is what \f(CW\*(C`ev_async\*(C'\fR watchers do: as long as the \f(CW\*(C`ev_async\*(C'\fR watcher is active, you can signal it by calling \f(CW\*(C`ev_async_send\*(C'\fR, which is thread\- and signal safe. .PP This functionality is very similar to \f(CW\*(C`ev_signal\*(C'\fR watchers, as signals, too, are asynchronous in nature, and signals, too, will be compressed (i.e. the number of callback invocations may be less than the number of \&\f(CW\*(C`ev_async_send\*(C'\fR calls). In fact, you could use signal watchers as a kind of \*(L"global async watchers\*(R" by using a watcher on an otherwise unused signal, and \f(CW\*(C`ev_feed_signal\*(C'\fR to signal this watcher from another thread, even without knowing which loop owns the signal. .PP \fIQueueing\fR .IX Subsection "Queueing" .PP \&\f(CW\*(C`ev_async\*(C'\fR does not support queueing of data in any way. The reason is that the author does not know of a simple (or any) algorithm for a multiple-writer-single-reader queue that works in all cases and doesn't need elaborate support such as pthreads or unportable memory access semantics. .PP That means that if you want to queue data, you have to provide your own queue. But at least I can tell you how to implement locking around your queue: .IP "queueing from a signal handler context" 4 .IX Item "queueing from a signal handler context" To implement race-free queueing, you simply add to the queue in the signal handler but you block the signal handler in the watcher callback. Here is an example that does that for some fictitious \s-1SIGUSR1\s0 handler: .Sp .Vb 1 \& static ev_async mysig; \& \& static void \& sigusr1_handler (void) \& { \& sometype data; \& \& // no locking etc. \& queue_put (data); \& ev_async_send (EV_DEFAULT_ &mysig); \& } \& \& static void \& mysig_cb (EV_P_ ev_async *w, int revents) \& { \& sometype data; \& sigset_t block, prev; \& \& sigemptyset (&block); \& sigaddset (&block, SIGUSR1); \& sigprocmask (SIG_BLOCK, &block, &prev); \& \& while (queue_get (&data)) \& process (data); \& \& if (sigismember (&prev, SIGUSR1) \& sigprocmask (SIG_UNBLOCK, &block, 0); \& } .Ve .Sp (Note: pthreads in theory requires you to use \f(CW\*(C`pthread_setmask\*(C'\fR instead of \f(CW\*(C`sigprocmask\*(C'\fR when you use threads, but libev doesn't do it either...). .IP "queueing from a thread context" 4 .IX Item "queueing from a thread context" The strategy for threads is different, as you cannot (easily) block threads but you can easily preempt them, so to queue safely you need to employ a traditional mutex lock, such as in this pthread example: .Sp .Vb 2 \& static ev_async mysig; \& static pthread_mutex_t mymutex = PTHREAD_MUTEX_INITIALIZER; \& \& static void \& otherthread (void) \& { \& // only need to lock the actual queueing operation \& pthread_mutex_lock (&mymutex); \& queue_put (data); \& pthread_mutex_unlock (&mymutex); \& \& ev_async_send (EV_DEFAULT_ &mysig); \& } \& \& static void \& mysig_cb (EV_P_ ev_async *w, int revents) \& { \& pthread_mutex_lock (&mymutex); \& \& while (queue_get (&data)) \& process (data); \& \& pthread_mutex_unlock (&mymutex); \& } .Ve .PP \fIWatcher-Specific Functions and Data Members\fR .IX Subsection "Watcher-Specific Functions and Data Members" .IP "ev_async_init (ev_async *, callback)" 4 .IX Item "ev_async_init (ev_async *, callback)" Initialises and configures the async watcher \- it has no parameters of any kind. There is a \f(CW\*(C`ev_async_set\*(C'\fR macro, but using it is utterly pointless, trust me. .IP "ev_async_send (loop, ev_async *)" 4 .IX Item "ev_async_send (loop, ev_async *)" Sends/signals/activates the given \f(CW\*(C`ev_async\*(C'\fR watcher, that is, feeds an \f(CW\*(C`EV_ASYNC\*(C'\fR event on the watcher into the event loop, and instantly returns. .Sp Unlike \f(CW\*(C`ev_feed_event\*(C'\fR, this call is safe to do from other threads, signal or similar contexts (see the discussion of \f(CW\*(C`EV_ATOMIC_T\*(C'\fR in the embedding section below on what exactly this means). .Sp Note that, as with other watchers in libev, multiple events might get compressed into a single callback invocation (another way to look at this is that \f(CW\*(C`ev_async\*(C'\fR watchers are level-triggered: they are set on \&\f(CW\*(C`ev_async_send\*(C'\fR, reset when the event loop detects that). .Sp This call incurs the overhead of at most one extra system call per event loop iteration, if the event loop is blocked, and no syscall at all if the event loop (or your program) is processing events. That means that repeated calls are basically free (there is no need to avoid calls for performance reasons) and that the overhead becomes smaller (typically zero) under load. .IP "bool = ev_async_pending (ev_async *)" 4 .IX Item "bool = ev_async_pending (ev_async *)" Returns a non-zero value when \f(CW\*(C`ev_async_send\*(C'\fR has been called on the watcher but the event has not yet been processed (or even noted) by the event loop. .Sp \&\f(CW\*(C`ev_async_send\*(C'\fR sets a flag in the watcher and wakes up the loop. When the loop iterates next and checks for the watcher to have become active, it will reset the flag again. \f(CW\*(C`ev_async_pending\*(C'\fR can be used to very quickly check whether invoking the loop might be a good idea. .Sp Not that this does \fInot\fR check whether the watcher itself is pending, only whether it has been requested to make this watcher pending: there is a time window between the event loop checking and resetting the async notification, and the callback being invoked. .SH "OTHER FUNCTIONS" .IX Header "OTHER FUNCTIONS" There are some other functions of possible interest. Described. Here. Now. .IP "ev_once (loop, int fd, int events, ev_tstamp timeout, callback, arg)" 4 .IX Item "ev_once (loop, int fd, int events, ev_tstamp timeout, callback, arg)" This function combines a simple timer and an I/O watcher, calls your callback on whichever event happens first and automatically stops both watchers. This is useful if you want to wait for a single event on an fd or timeout without having to allocate/configure/start/stop/free one or more watchers yourself. .Sp If \f(CW\*(C`fd\*(C'\fR is less than 0, then no I/O watcher will be started and the \&\f(CW\*(C`events\*(C'\fR argument is being ignored. Otherwise, an \f(CW\*(C`ev_io\*(C'\fR watcher for the given \f(CW\*(C`fd\*(C'\fR and \f(CW\*(C`events\*(C'\fR set will be created and started. .Sp If \f(CW\*(C`timeout\*(C'\fR is less than 0, then no timeout watcher will be started. Otherwise an \f(CW\*(C`ev_timer\*(C'\fR watcher with after = \f(CW\*(C`timeout\*(C'\fR (and repeat = 0) will be started. \f(CW0\fR is a valid timeout. .Sp The callback has the type \f(CW\*(C`void (*cb)(int revents, void *arg)\*(C'\fR and is passed an \f(CW\*(C`revents\*(C'\fR set like normal event callbacks (a combination of \&\f(CW\*(C`EV_ERROR\*(C'\fR, \f(CW\*(C`EV_READ\*(C'\fR, \f(CW\*(C`EV_WRITE\*(C'\fR or \f(CW\*(C`EV_TIMER\*(C'\fR) and the \f(CW\*(C`arg\*(C'\fR value passed to \f(CW\*(C`ev_once\*(C'\fR. Note that it is possible to receive \fIboth\fR a timeout and an io event at the same time \- you probably should give io events precedence. .Sp Example: wait up to ten seconds for data to appear on \s-1STDIN_FILENO.\s0 .Sp .Vb 7 \& static void stdin_ready (int revents, void *arg) \& { \& if (revents & EV_READ) \& /* stdin might have data for us, joy! */; \& else if (revents & EV_TIMER) \& /* doh, nothing entered */; \& } \& \& ev_once (STDIN_FILENO, EV_READ, 10., stdin_ready, 0); .Ve .IP "ev_feed_fd_event (loop, int fd, int revents)" 4 .IX Item "ev_feed_fd_event (loop, int fd, int revents)" Feed an event on the given fd, as if a file descriptor backend detected the given events. .IP "ev_feed_signal_event (loop, int signum)" 4 .IX Item "ev_feed_signal_event (loop, int signum)" Feed an event as if the given signal occurred. See also \f(CW\*(C`ev_feed_signal\*(C'\fR, which is async-safe. .SH "COMMON OR USEFUL IDIOMS (OR BOTH)" .IX Header "COMMON OR USEFUL IDIOMS (OR BOTH)" This section explains some common idioms that are not immediately obvious. Note that examples are sprinkled over the whole manual, and this section only contains stuff that wouldn't fit anywhere else. .SS "\s-1ASSOCIATING CUSTOM DATA WITH A WATCHER\s0" .IX Subsection "ASSOCIATING CUSTOM DATA WITH A WATCHER" Each watcher has, by default, a \f(CW\*(C`void *data\*(C'\fR member that you can read or modify at any time: libev will completely ignore it. This can be used to associate arbitrary data with your watcher. If you need more data and don't want to allocate memory separately and store a pointer to it in that data member, you can also \*(L"subclass\*(R" the watcher type and provide your own data: .PP .Vb 7 \& struct my_io \& { \& ev_io io; \& int otherfd; \& void *somedata; \& struct whatever *mostinteresting; \& }; \& \& ... \& struct my_io w; \& ev_io_init (&w.io, my_cb, fd, EV_READ); .Ve .PP And since your callback will be called with a pointer to the watcher, you can cast it back to your own type: .PP .Vb 5 \& static void my_cb (struct ev_loop *loop, ev_io *w_, int revents) \& { \& struct my_io *w = (struct my_io *)w_; \& ... \& } .Ve .PP More interesting and less C\-conformant ways of casting your callback function type instead have been omitted. .SS "\s-1BUILDING YOUR OWN COMPOSITE WATCHERS\s0" .IX Subsection "BUILDING YOUR OWN COMPOSITE WATCHERS" Another common scenario is to use some data structure with multiple embedded watchers, in effect creating your own watcher that combines multiple libev event sources into one \*(L"super-watcher\*(R": .PP .Vb 6 \& struct my_biggy \& { \& int some_data; \& ev_timer t1; \& ev_timer t2; \& } .Ve .PP In this case getting the pointer to \f(CW\*(C`my_biggy\*(C'\fR is a bit more complicated: Either you store the address of your \f(CW\*(C`my_biggy\*(C'\fR struct in the \f(CW\*(C`data\*(C'\fR member of the watcher (for woozies or \*(C+ coders), or you need to use some pointer arithmetic using \f(CW\*(C`offsetof\*(C'\fR inside your watchers (for real programmers): .PP .Vb 1 \& #include \& \& static void \& t1_cb (EV_P_ ev_timer *w, int revents) \& { \& struct my_biggy big = (struct my_biggy *) \& (((char *)w) \- offsetof (struct my_biggy, t1)); \& } \& \& static void \& t2_cb (EV_P_ ev_timer *w, int revents) \& { \& struct my_biggy big = (struct my_biggy *) \& (((char *)w) \- offsetof (struct my_biggy, t2)); \& } .Ve .SS "\s-1AVOIDING FINISHING BEFORE RETURNING\s0" .IX Subsection "AVOIDING FINISHING BEFORE RETURNING" Often you have structures like this in event-based programs: .PP .Vb 4 \& callback () \& { \& free (request); \& } \& \& request = start_new_request (..., callback); .Ve .PP The intent is to start some \*(L"lengthy\*(R" operation. The \f(CW\*(C`request\*(C'\fR could be used to cancel the operation, or do other things with it. .PP It's not uncommon to have code paths in \f(CW\*(C`start_new_request\*(C'\fR that immediately invoke the callback, for example, to report errors. Or you add some caching layer that finds that it can skip the lengthy aspects of the operation and simply invoke the callback with the result. .PP The problem here is that this will happen \fIbefore\fR \f(CW\*(C`start_new_request\*(C'\fR has returned, so \f(CW\*(C`request\*(C'\fR is not set. .PP Even if you pass the request by some safer means to the callback, you might want to do something to the request after starting it, such as canceling it, which probably isn't working so well when the callback has already been invoked. .PP A common way around all these issues is to make sure that \&\f(CW\*(C`start_new_request\*(C'\fR \fIalways\fR returns before the callback is invoked. If \&\f(CW\*(C`start_new_request\*(C'\fR immediately knows the result, it can artificially delay invoking the callback by using a \f(CW\*(C`prepare\*(C'\fR or \f(CW\*(C`idle\*(C'\fR watcher for example, or more sneakily, by reusing an existing (stopped) watcher and pushing it into the pending queue: .PP .Vb 2 \& ev_set_cb (watcher, callback); \& ev_feed_event (EV_A_ watcher, 0); .Ve .PP This way, \f(CW\*(C`start_new_request\*(C'\fR can safely return before the callback is invoked, while not delaying callback invocation too much. .SS "\s-1MODEL/NESTED EVENT LOOP INVOCATIONS AND EXIT CONDITIONS\s0" .IX Subsection "MODEL/NESTED EVENT LOOP INVOCATIONS AND EXIT CONDITIONS" Often (especially in \s-1GUI\s0 toolkits) there are places where you have \&\fImodal\fR interaction, which is most easily implemented by recursively invoking \f(CW\*(C`ev_run\*(C'\fR. .PP This brings the problem of exiting \- a callback might want to finish the main \f(CW\*(C`ev_run\*(C'\fR call, but not the nested one (e.g. user clicked \*(L"Quit\*(R", but a modal \*(L"Are you sure?\*(R" dialog is still waiting), or just the nested one and not the main one (e.g. user clocked \*(L"Ok\*(R" in a modal dialog), or some other combination: In these cases, a simple \f(CW\*(C`ev_break\*(C'\fR will not work. .PP The solution is to maintain \*(L"break this loop\*(R" variable for each \f(CW\*(C`ev_run\*(C'\fR invocation, and use a loop around \f(CW\*(C`ev_run\*(C'\fR until the condition is triggered, using \f(CW\*(C`EVRUN_ONCE\*(C'\fR: .PP .Vb 2 \& // main loop \& int exit_main_loop = 0; \& \& while (!exit_main_loop) \& ev_run (EV_DEFAULT_ EVRUN_ONCE); \& \& // in a modal watcher \& int exit_nested_loop = 0; \& \& while (!exit_nested_loop) \& ev_run (EV_A_ EVRUN_ONCE); .Ve .PP To exit from any of these loops, just set the corresponding exit variable: .PP .Vb 2 \& // exit modal loop \& exit_nested_loop = 1; \& \& // exit main program, after modal loop is finished \& exit_main_loop = 1; \& \& // exit both \& exit_main_loop = exit_nested_loop = 1; .Ve .SS "\s-1THREAD LOCKING EXAMPLE\s0" .IX Subsection "THREAD LOCKING EXAMPLE" Here is a fictitious example of how to run an event loop in a different thread from where callbacks are being invoked and watchers are created/added/removed. .PP For a real-world example, see the \f(CW\*(C`EV::Loop::Async\*(C'\fR perl module, which uses exactly this technique (which is suited for many high-level languages). .PP The example uses a pthread mutex to protect the loop data, a condition variable to wait for callback invocations, an async watcher to notify the event loop thread and an unspecified mechanism to wake up the main thread. .PP First, you need to associate some data with the event loop: .PP .Vb 6 \& typedef struct { \& mutex_t lock; /* global loop lock */ \& ev_async async_w; \& thread_t tid; \& cond_t invoke_cv; \& } userdata; \& \& void prepare_loop (EV_P) \& { \& // for simplicity, we use a static userdata struct. \& static userdata u; \& \& ev_async_init (&u\->async_w, async_cb); \& ev_async_start (EV_A_ &u\->async_w); \& \& pthread_mutex_init (&u\->lock, 0); \& pthread_cond_init (&u\->invoke_cv, 0); \& \& // now associate this with the loop \& ev_set_userdata (EV_A_ u); \& ev_set_invoke_pending_cb (EV_A_ l_invoke); \& ev_set_loop_release_cb (EV_A_ l_release, l_acquire); \& \& // then create the thread running ev_run \& pthread_create (&u\->tid, 0, l_run, EV_A); \& } .Ve .PP The callback for the \f(CW\*(C`ev_async\*(C'\fR watcher does nothing: the watcher is used solely to wake up the event loop so it takes notice of any new watchers that might have been added: .PP .Vb 5 \& static void \& async_cb (EV_P_ ev_async *w, int revents) \& { \& // just used for the side effects \& } .Ve .PP The \f(CW\*(C`l_release\*(C'\fR and \f(CW\*(C`l_acquire\*(C'\fR callbacks simply unlock/lock the mutex protecting the loop data, respectively. .PP .Vb 6 \& static void \& l_release (EV_P) \& { \& userdata *u = ev_userdata (EV_A); \& pthread_mutex_unlock (&u\->lock); \& } \& \& static void \& l_acquire (EV_P) \& { \& userdata *u = ev_userdata (EV_A); \& pthread_mutex_lock (&u\->lock); \& } .Ve .PP The event loop thread first acquires the mutex, and then jumps straight into \f(CW\*(C`ev_run\*(C'\fR: .PP .Vb 4 \& void * \& l_run (void *thr_arg) \& { \& struct ev_loop *loop = (struct ev_loop *)thr_arg; \& \& l_acquire (EV_A); \& pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0); \& ev_run (EV_A_ 0); \& l_release (EV_A); \& \& return 0; \& } .Ve .PP Instead of invoking all pending watchers, the \f(CW\*(C`l_invoke\*(C'\fR callback will signal the main thread via some unspecified mechanism (signals? pipe writes? \f(CW\*(C`Async::Interrupt\*(C'\fR?) and then waits until all pending watchers have been called (in a while loop because a) spurious wakeups are possible and b) skipping inter-thread-communication when there are no pending watchers is very beneficial): .PP .Vb 4 \& static void \& l_invoke (EV_P) \& { \& userdata *u = ev_userdata (EV_A); \& \& while (ev_pending_count (EV_A)) \& { \& wake_up_other_thread_in_some_magic_or_not_so_magic_way (); \& pthread_cond_wait (&u\->invoke_cv, &u\->lock); \& } \& } .Ve .PP Now, whenever the main thread gets told to invoke pending watchers, it will grab the lock, call \f(CW\*(C`ev_invoke_pending\*(C'\fR and then signal the loop thread to continue: .PP .Vb 4 \& static void \& real_invoke_pending (EV_P) \& { \& userdata *u = ev_userdata (EV_A); \& \& pthread_mutex_lock (&u\->lock); \& ev_invoke_pending (EV_A); \& pthread_cond_signal (&u\->invoke_cv); \& pthread_mutex_unlock (&u\->lock); \& } .Ve .PP Whenever you want to start/stop a watcher or do other modifications to an event loop, you will now have to lock: .PP .Vb 2 \& ev_timer timeout_watcher; \& userdata *u = ev_userdata (EV_A); \& \& ev_timer_init (&timeout_watcher, timeout_cb, 5.5, 0.); \& \& pthread_mutex_lock (&u\->lock); \& ev_timer_start (EV_A_ &timeout_watcher); \& ev_async_send (EV_A_ &u\->async_w); \& pthread_mutex_unlock (&u\->lock); .Ve .PP Note that sending the \f(CW\*(C`ev_async\*(C'\fR watcher is required because otherwise an event loop currently blocking in the kernel will have no knowledge about the newly added timer. By waking up the loop it will pick up any new watchers in the next event loop iteration. .SS "\s-1THREADS, COROUTINES, CONTINUATIONS, QUEUES... INSTEAD OF CALLBACKS\s0" .IX Subsection "THREADS, COROUTINES, CONTINUATIONS, QUEUES... INSTEAD OF CALLBACKS" While the overhead of a callback that e.g. schedules a thread is small, it is still an overhead. If you embed libev, and your main usage is with some kind of threads or coroutines, you might want to customise libev so that doesn't need callbacks anymore. .PP Imagine you have coroutines that you can switch to using a function \&\f(CW\*(C`switch_to (coro)\*(C'\fR, that libev runs in a coroutine called \f(CW\*(C`libev_coro\*(C'\fR and that due to some magic, the currently active coroutine is stored in a global called \f(CW\*(C`current_coro\*(C'\fR. Then you can build your own \*(L"wait for libev event\*(R" primitive by changing \f(CW\*(C`EV_CB_DECLARE\*(C'\fR and \f(CW\*(C`EV_CB_INVOKE\*(C'\fR (note the differing \f(CW\*(C`;\*(C'\fR conventions): .PP .Vb 2 \& #define EV_CB_DECLARE(type) struct my_coro *cb; \& #define EV_CB_INVOKE(watcher) switch_to ((watcher)\->cb) .Ve .PP That means instead of having a C callback function, you store the coroutine to switch to in each watcher, and instead of having libev call your callback, you instead have it switch to that coroutine. .PP A coroutine might now wait for an event with a function called \&\f(CW\*(C`wait_for_event\*(C'\fR. (the watcher needs to be started, as always, but it doesn't matter when, or whether the watcher is active or not when this function is called): .PP .Vb 6 \& void \& wait_for_event (ev_watcher *w) \& { \& ev_set_cb (w, current_coro); \& switch_to (libev_coro); \& } .Ve .PP That basically suspends the coroutine inside \f(CW\*(C`wait_for_event\*(C'\fR and continues the libev coroutine, which, when appropriate, switches back to this or any other coroutine. .PP You can do similar tricks if you have, say, threads with an event queue \- instead of storing a coroutine, you store the queue object and instead of switching to a coroutine, you push the watcher onto the queue and notify any waiters. .PP To embed libev, see \*(L"\s-1EMBEDDING\*(R"\s0, but in short, it's easiest to create two files, \fImy_ev.h\fR and \fImy_ev.c\fR that include the respective libev files: .PP .Vb 4 \& // my_ev.h \& #define EV_CB_DECLARE(type) struct my_coro *cb; \& #define EV_CB_INVOKE(watcher) switch_to ((watcher)\->cb) \& #include "../libev/ev.h" \& \& // my_ev.c \& #define EV_H "my_ev.h" \& #include "../libev/ev.c" .Ve .PP And then use \fImy_ev.h\fR when you would normally use \fIev.h\fR, and compile \&\fImy_ev.c\fR into your project. When properly specifying include paths, you can even use \fIev.h\fR as header file name directly. .SH "LIBEVENT EMULATION" .IX Header "LIBEVENT EMULATION" Libev offers a compatibility emulation layer for libevent. It cannot emulate the internals of libevent, so here are some usage hints: .IP "\(bu" 4 Only the libevent\-1.4.1\-beta \s-1API\s0 is being emulated. .Sp This was the newest libevent version available when libev was implemented, and is still mostly unchanged in 2010. .IP "\(bu" 4 Use it by including , as usual. .IP "\(bu" 4 The following members are fully supported: ev_base, ev_callback, ev_arg, ev_fd, ev_res, ev_events. .IP "\(bu" 4 Avoid using ev_flags and the EVLIST_*\-macros, while it is maintained by libev, it does not work exactly the same way as in libevent (consider it a private \s-1API\s0). .IP "\(bu" 4 Priorities are not currently supported. Initialising priorities will fail and all watchers will have the same priority, even though there is an ev_pri field. .IP "\(bu" 4 In libevent, the last base created gets the signals, in libev, the base that registered the signal gets the signals. .IP "\(bu" 4 Other members are not supported. .IP "\(bu" 4 The libev emulation is \fInot\fR \s-1ABI\s0 compatible to libevent, you need to use the libev header file and library. .SH "\*(C+ SUPPORT" .IX Header " SUPPORT" .SS "C \s-1API\s0" .IX Subsection "C API" The normal C \s-1API\s0 should work fine when used from \*(C+: both ev.h and the libev sources can be compiled as \*(C+. Therefore, code that uses the C \s-1API\s0 will work fine. .PP Proper exception specifications might have to be added to callbacks passed to libev: exceptions may be thrown only from watcher callbacks, all other callbacks (allocator, syserr, loop acquire/release and periodic reschedule callbacks) must not throw exceptions, and might need a \f(CW\*(C`noexcept\*(C'\fR specification. If you have code that needs to be compiled as both C and \&\*(C+ you can use the \f(CW\*(C`EV_NOEXCEPT\*(C'\fR macro for this: .PP .Vb 6 \& static void \& fatal_error (const char *msg) EV_NOEXCEPT \& { \& perror (msg); \& abort (); \& } \& \& ... \& ev_set_syserr_cb (fatal_error); .Ve .PP The only \s-1API\s0 functions that can currently throw exceptions are \f(CW\*(C`ev_run\*(C'\fR, \&\f(CW\*(C`ev_invoke\*(C'\fR, \f(CW\*(C`ev_invoke_pending\*(C'\fR and \f(CW\*(C`ev_loop_destroy\*(C'\fR (the latter because it runs cleanup watchers). .PP Throwing exceptions in watcher callbacks is only supported if libev itself is compiled with a \*(C+ compiler or your C and \*(C+ environments allow throwing exceptions through C libraries (most do). .SS "\*(C+ \s-1API\s0" .IX Subsection " API" Libev comes with some simplistic wrapper classes for \*(C+ that mainly allow you to use some convenience methods to start/stop watchers and also change the callback model to a model using method callbacks on objects. .PP To use it, .PP .Vb 1 \& #include .Ve .PP This automatically includes \fIev.h\fR and puts all of its definitions (many of them macros) into the global namespace. All \*(C+ specific things are put into the \f(CW\*(C`ev\*(C'\fR namespace. It should support all the same embedding options as \fIev.h\fR, most notably \f(CW\*(C`EV_MULTIPLICITY\*(C'\fR. .PP Care has been taken to keep the overhead low. The only data member the \*(C+ classes add (compared to plain C\-style watchers) is the event loop pointer that the watcher is associated with (or no additional members at all if you disable \f(CW\*(C`EV_MULTIPLICITY\*(C'\fR when embedding libev). .PP Currently, functions, static and non-static member functions and classes with \f(CW\*(C`operator ()\*(C'\fR can be used as callbacks. Other types should be easy to add as long as they only need one additional pointer for context. If you need support for other types of functors please contact the author (preferably after implementing it). .PP For all this to work, your \*(C+ compiler either has to use the same calling conventions as your C compiler (for static member functions), or you have to embed libev and compile libev itself as \*(C+. .PP Here is a list of things available in the \f(CW\*(C`ev\*(C'\fR namespace: .ie n .IP """ev::READ"", ""ev::WRITE"" etc." 4 .el .IP "\f(CWev::READ\fR, \f(CWev::WRITE\fR etc." 4 .IX Item "ev::READ, ev::WRITE etc." These are just enum values with the same values as the \f(CW\*(C`EV_READ\*(C'\fR etc. macros from \fIev.h\fR. .ie n .IP """ev::tstamp"", ""ev::now""" 4 .el .IP "\f(CWev::tstamp\fR, \f(CWev::now\fR" 4 .IX Item "ev::tstamp, ev::now" Aliases to the same types/functions as with the \f(CW\*(C`ev_\*(C'\fR prefix. .ie n .IP """ev::io"", ""ev::timer"", ""ev::periodic"", ""ev::idle"", ""ev::sig"" etc." 4 .el .IP "\f(CWev::io\fR, \f(CWev::timer\fR, \f(CWev::periodic\fR, \f(CWev::idle\fR, \f(CWev::sig\fR etc." 4 .IX Item "ev::io, ev::timer, ev::periodic, ev::idle, ev::sig etc." For each \f(CW\*(C`ev_TYPE\*(C'\fR watcher in \fIev.h\fR there is a corresponding class of the same name in the \f(CW\*(C`ev\*(C'\fR namespace, with the exception of \f(CW\*(C`ev_signal\*(C'\fR which is called \f(CW\*(C`ev::sig\*(C'\fR to avoid clashes with the \f(CW\*(C`signal\*(C'\fR macro defined by many implementations. .Sp All of those classes have these methods: .RS 4 .IP "ev::TYPE::TYPE ()" 4 .IX Item "ev::TYPE::TYPE ()" .PD 0 .IP "ev::TYPE::TYPE (loop)" 4 .IX Item "ev::TYPE::TYPE (loop)" .IP "ev::TYPE::~TYPE" 4 .IX Item "ev::TYPE::~TYPE" .PD The constructor (optionally) takes an event loop to associate the watcher with. If it is omitted, it will use \f(CW\*(C`EV_DEFAULT\*(C'\fR. .Sp The constructor calls \f(CW\*(C`ev_init\*(C'\fR for you, which means you have to call the \&\f(CW\*(C`set\*(C'\fR method before starting it. .Sp It will not set a callback, however: You have to call the templated \f(CW\*(C`set\*(C'\fR method to set a callback before you can start the watcher. .Sp (The reason why you have to use a method is a limitation in \*(C+ which does not allow explicit template arguments for constructors). .Sp The destructor automatically stops the watcher if it is active. .IP "w\->set (object *)" 4 .IX Item "w->set (object *)" This method sets the callback method to call. The method has to have a signature of \f(CW\*(C`void (*)(ev_TYPE &, int)\*(C'\fR, it receives the watcher as first argument and the \f(CW\*(C`revents\*(C'\fR as second. The object must be given as parameter and is stored in the \f(CW\*(C`data\*(C'\fR member of the watcher. .Sp This method synthesizes efficient thunking code to call your method from the C callback that libev requires. If your compiler can inline your callback (i.e. it is visible to it at the place of the \f(CW\*(C`set\*(C'\fR call and your compiler is good :), then the method will be fully inlined into the thunking function, making it as fast as a direct C callback. .Sp Example: simple class declaration and watcher initialisation .Sp .Vb 4 \& struct myclass \& { \& void io_cb (ev::io &w, int revents) { } \& } \& \& myclass obj; \& ev::io iow; \& iow.set (&obj); .Ve .IP "w\->set (object *)" 4 .IX Item "w->set (object *)" This is a variation of a method callback \- leaving out the method to call will default the method to \f(CW\*(C`operator ()\*(C'\fR, which makes it possible to use functor objects without having to manually specify the \f(CW\*(C`operator ()\*(C'\fR all the time. Incidentally, you can then also leave out the template argument list. .Sp The \f(CW\*(C`operator ()\*(C'\fR method prototype must be \f(CW\*(C`void operator ()(watcher &w, int revents)\*(C'\fR. .Sp See the method\-\f(CW\*(C`set\*(C'\fR above for more details. .Sp Example: use a functor object as callback. .Sp .Vb 7 \& struct myfunctor \& { \& void operator() (ev::io &w, int revents) \& { \& ... \& } \& } \& \& myfunctor f; \& \& ev::io w; \& w.set (&f); .Ve .IP "w\->set (void *data = 0)" 4 .IX Item "w->set (void *data = 0)" Also sets a callback, but uses a static method or plain function as callback. The optional \f(CW\*(C`data\*(C'\fR argument will be stored in the watcher's \&\f(CW\*(C`data\*(C'\fR member and is free for you to use. .Sp The prototype of the \f(CW\*(C`function\*(C'\fR must be \f(CW\*(C`void (*)(ev::TYPE &w, int)\*(C'\fR. .Sp See the method\-\f(CW\*(C`set\*(C'\fR above for more details. .Sp Example: Use a plain function as callback. .Sp .Vb 2 \& static void io_cb (ev::io &w, int revents) { } \& iow.set (); .Ve .IP "w\->set (loop)" 4 .IX Item "w->set (loop)" Associates a different \f(CW\*(C`struct ev_loop\*(C'\fR with this watcher. You can only do this when the watcher is inactive (and not pending either). .IP "w\->set ([arguments])" 4 .IX Item "w->set ([arguments])" Basically the same as \f(CW\*(C`ev_TYPE_set\*(C'\fR (except for \f(CW\*(C`ev::embed\*(C'\fR watchers>), with the same arguments. Either this method or a suitable start method must be called at least once. Unlike the C counterpart, an active watcher gets automatically stopped and restarted when reconfiguring it with this method. .Sp For \f(CW\*(C`ev::embed\*(C'\fR watchers this method is called \f(CW\*(C`set_embed\*(C'\fR, to avoid clashing with the \f(CW\*(C`set (loop)\*(C'\fR method. .Sp For \f(CW\*(C`ev::io\*(C'\fR watchers there is an additional \f(CW\*(C`set\*(C'\fR method that acepts a new event mask only, and internally calls \f(CW\*(C`ev_io_modfify\*(C'\fR. .IP "w\->start ()" 4 .IX Item "w->start ()" Starts the watcher. Note that there is no \f(CW\*(C`loop\*(C'\fR argument, as the constructor already stores the event loop. .IP "w\->start ([arguments])" 4 .IX Item "w->start ([arguments])" Instead of calling \f(CW\*(C`set\*(C'\fR and \f(CW\*(C`start\*(C'\fR methods separately, it is often convenient to wrap them in one call. Uses the same type of arguments as the configure \f(CW\*(C`set\*(C'\fR method of the watcher. .IP "w\->stop ()" 4 .IX Item "w->stop ()" Stops the watcher if it is active. Again, no \f(CW\*(C`loop\*(C'\fR argument. .ie n .IP "w\->again () (""ev::timer"", ""ev::periodic"" only)" 4 .el .IP "w\->again () (\f(CWev::timer\fR, \f(CWev::periodic\fR only)" 4 .IX Item "w->again () (ev::timer, ev::periodic only)" For \f(CW\*(C`ev::timer\*(C'\fR and \f(CW\*(C`ev::periodic\*(C'\fR, this invokes the corresponding \&\f(CW\*(C`ev_TYPE_again\*(C'\fR function. .ie n .IP "w\->sweep () (""ev::embed"" only)" 4 .el .IP "w\->sweep () (\f(CWev::embed\fR only)" 4 .IX Item "w->sweep () (ev::embed only)" Invokes \f(CW\*(C`ev_embed_sweep\*(C'\fR. .ie n .IP "w\->update () (""ev::stat"" only)" 4 .el .IP "w\->update () (\f(CWev::stat\fR only)" 4 .IX Item "w->update () (ev::stat only)" Invokes \f(CW\*(C`ev_stat_stat\*(C'\fR. .RE .RS 4 .RE .PP Example: Define a class with two I/O and idle watchers, start the I/O watchers in the constructor. .PP .Vb 5 \& class myclass \& { \& ev::io io ; void io_cb (ev::io &w, int revents); \& ev::io io2 ; void io2_cb (ev::io &w, int revents); \& ev::idle idle; void idle_cb (ev::idle &w, int revents); \& \& myclass (int fd) \& { \& io .set (this); \& io2 .set (this); \& idle.set (this); \& \& io.set (fd, ev::WRITE); // configure the watcher \& io.start (); // start it whenever convenient \& \& io2.start (fd, ev::READ); // set + start in one call \& } \& }; .Ve .SH "OTHER LANGUAGE BINDINGS" .IX Header "OTHER LANGUAGE BINDINGS" Libev does not offer other language bindings itself, but bindings for a number of languages exist in the form of third-party packages. If you know any interesting language binding in addition to the ones listed here, drop me a note. .IP "Perl" 4 .IX Item "Perl" The \s-1EV\s0 module implements the full libev \s-1API\s0 and is actually used to test libev. \s-1EV\s0 is developed together with libev. Apart from the \s-1EV\s0 core module, there are additional modules that implement libev-compatible interfaces to \f(CW\*(C`libadns\*(C'\fR (\f(CW\*(C`EV::ADNS\*(C'\fR, but \f(CW\*(C`AnyEvent::DNS\*(C'\fR is preferred nowadays), \&\f(CW\*(C`Net::SNMP\*(C'\fR (\f(CW\*(C`Net::SNMP::EV\*(C'\fR) and the \f(CW\*(C`libglib\*(C'\fR event core (\f(CW\*(C`Glib::EV\*(C'\fR and \f(CW\*(C`EV::Glib\*(C'\fR). .Sp It can be found and installed via \s-1CPAN,\s0 its homepage is at . .IP "Python" 4 .IX Item "Python" Python bindings can be found at . It seems to be quite complete and well-documented. .IP "Ruby" 4 .IX Item "Ruby" Tony Arcieri has written a ruby extension that offers access to a subset of the libev \s-1API\s0 and adds file handle abstractions, asynchronous \s-1DNS\s0 and more on top of it. It can be found via gem servers. Its homepage is at . .Sp Roger Pack reports that using the link order \f(CW\*(C`\-lws2_32 \-lmsvcrt\-ruby\-190\*(C'\fR makes rev work even on mingw. .IP "Haskell" 4 .IX Item "Haskell" A haskell binding to libev is available at . .IP "D" 4 .IX Item "D" Leandro Lucarella has written a D language binding (\fIev.d\fR) for libev, to be found at . .IP "Ocaml" 4 .IX Item "Ocaml" Erkki Seppala has written Ocaml bindings for libev, to be found at . .IP "Lua" 4 .IX Item "Lua" Brian Maher has written a partial interface to libev for lua (at the time of this writing, only \f(CW\*(C`ev_io\*(C'\fR and \f(CW\*(C`ev_timer\*(C'\fR), to be found at . .IP "Javascript" 4 .IX Item "Javascript" Node.js () uses libev as the underlying event library. .IP "Others" 4 .IX Item "Others" There are others, and I stopped counting. .SH "MACRO MAGIC" .IX Header "MACRO MAGIC" Libev can be compiled with a variety of options, the most fundamental of which is \f(CW\*(C`EV_MULTIPLICITY\*(C'\fR. This option determines whether (most) functions and callbacks have an initial \f(CW\*(C`struct ev_loop *\*(C'\fR argument. .PP To make it easier to write programs that cope with either variant, the following macros are defined: .ie n .IP """EV_A"", ""EV_A_""" 4 .el .IP "\f(CWEV_A\fR, \f(CWEV_A_\fR" 4 .IX Item "EV_A, EV_A_" This provides the loop \fIargument\fR for functions, if one is required (\*(L"ev loop argument\*(R"). The \f(CW\*(C`EV_A\*(C'\fR form is used when this is the sole argument, \&\f(CW\*(C`EV_A_\*(C'\fR is used when other arguments are following. Example: .Sp .Vb 3 \& ev_unref (EV_A); \& ev_timer_add (EV_A_ watcher); \& ev_run (EV_A_ 0); .Ve .Sp It assumes the variable \f(CW\*(C`loop\*(C'\fR of type \f(CW\*(C`struct ev_loop *\*(C'\fR is in scope, which is often provided by the following macro. .ie n .IP """EV_P"", ""EV_P_""" 4 .el .IP "\f(CWEV_P\fR, \f(CWEV_P_\fR" 4 .IX Item "EV_P, EV_P_" This provides the loop \fIparameter\fR for functions, if one is required (\*(L"ev loop parameter\*(R"). The \f(CW\*(C`EV_P\*(C'\fR form is used when this is the sole parameter, \&\f(CW\*(C`EV_P_\*(C'\fR is used when other parameters are following. Example: .Sp .Vb 2 \& // this is how ev_unref is being declared \& static void ev_unref (EV_P); \& \& // this is how you can declare your typical callback \& static void cb (EV_P_ ev_timer *w, int revents) .Ve .Sp It declares a parameter \f(CW\*(C`loop\*(C'\fR of type \f(CW\*(C`struct ev_loop *\*(C'\fR, quite suitable for use with \f(CW\*(C`EV_A\*(C'\fR. .ie n .IP """EV_DEFAULT"", ""EV_DEFAULT_""" 4 .el .IP "\f(CWEV_DEFAULT\fR, \f(CWEV_DEFAULT_\fR" 4 .IX Item "EV_DEFAULT, EV_DEFAULT_" Similar to the other two macros, this gives you the value of the default loop, if multiple loops are supported (\*(L"ev loop default\*(R"). The default loop will be initialised if it isn't already initialised. .Sp For non-multiplicity builds, these macros do nothing, so you always have to initialise the loop somewhere. .ie n .IP """EV_DEFAULT_UC"", ""EV_DEFAULT_UC_""" 4 .el .IP "\f(CWEV_DEFAULT_UC\fR, \f(CWEV_DEFAULT_UC_\fR" 4 .IX Item "EV_DEFAULT_UC, EV_DEFAULT_UC_" Usage identical to \f(CW\*(C`EV_DEFAULT\*(C'\fR and \f(CW\*(C`EV_DEFAULT_\*(C'\fR, but requires that the default loop has been initialised (\f(CW\*(C`UC\*(C'\fR == unchecked). Their behaviour is undefined when the default loop has not been initialised by a previous execution of \f(CW\*(C`EV_DEFAULT\*(C'\fR, \f(CW\*(C`EV_DEFAULT_\*(C'\fR or \f(CW\*(C`ev_default_init (...)\*(C'\fR. .Sp It is often prudent to use \f(CW\*(C`EV_DEFAULT\*(C'\fR when initialising the first watcher in a function but use \f(CW\*(C`EV_DEFAULT_UC\*(C'\fR afterwards. .PP Example: Declare and initialise a check watcher, utilising the above macros so it will work regardless of whether multiple loops are supported or not. .PP .Vb 5 \& static void \& check_cb (EV_P_ ev_timer *w, int revents) \& { \& ev_check_stop (EV_A_ w); \& } \& \& ev_check check; \& ev_check_init (&check, check_cb); \& ev_check_start (EV_DEFAULT_ &check); \& ev_run (EV_DEFAULT_ 0); .Ve .SH "EMBEDDING" .IX Header "EMBEDDING" Libev can (and often is) directly embedded into host applications. Examples of applications that embed it include the Deliantra Game Server, the \s-1EV\s0 perl module, the \s-1GNU\s0 Virtual Private Ethernet (gvpe) and rxvt-unicode. .PP The goal is to enable you to just copy the necessary files into your source directory without having to change even a single line in them, so you can easily upgrade by simply copying (or having a checked-out copy of libev somewhere in your source tree). .SS "\s-1FILESETS\s0" .IX Subsection "FILESETS" Depending on what features you need you need to include one or more sets of files in your application. .PP \fI\s-1CORE EVENT LOOP\s0\fR .IX Subsection "CORE EVENT LOOP" .PP To include only the libev core (all the \f(CW\*(C`ev_*\*(C'\fR functions), with manual configuration (no autoconf): .PP .Vb 2 \& #define EV_STANDALONE 1 \& #include "ev.c" .Ve .PP This will automatically include \fIev.h\fR, too, and should be done in a single C source file only to provide the function implementations. To use it, do the same for \fIev.h\fR in all files wishing to use this \s-1API\s0 (best done by writing a wrapper around \fIev.h\fR that you can include instead and where you can put other configuration options): .PP .Vb 2 \& #define EV_STANDALONE 1 \& #include "ev.h" .Ve .PP Both header files and implementation files can be compiled with a \*(C+ compiler (at least, that's a stated goal, and breakage will be treated as a bug). .PP You need the following files in your source tree, or in a directory in your include path (e.g. in libev/ when using \-Ilibev): .PP .Vb 4 \& ev.h \& ev.c \& ev_vars.h \& ev_wrap.h \& \& ev_win32.c required on win32 platforms only \& \& ev_select.c only when select backend is enabled \& ev_poll.c only when poll backend is enabled \& ev_epoll.c only when the epoll backend is enabled \& ev_linuxaio.c only when the linux aio backend is enabled \& ev_iouring.c only when the linux io_uring backend is enabled \& ev_kqueue.c only when the kqueue backend is enabled \& ev_port.c only when the solaris port backend is enabled .Ve .PP \&\fIev.c\fR includes the backend files directly when enabled, so you only need to compile this single file. .PP \fI\s-1LIBEVENT COMPATIBILITY API\s0\fR .IX Subsection "LIBEVENT COMPATIBILITY API" .PP To include the libevent compatibility \s-1API,\s0 also include: .PP .Vb 1 \& #include "event.c" .Ve .PP in the file including \fIev.c\fR, and: .PP .Vb 1 \& #include "event.h" .Ve .PP in the files that want to use the libevent \s-1API.\s0 This also includes \fIev.h\fR. .PP You need the following additional files for this: .PP .Vb 2 \& event.h \& event.c .Ve .PP \fI\s-1AUTOCONF SUPPORT\s0\fR .IX Subsection "AUTOCONF SUPPORT" .PP Instead of using \f(CW\*(C`EV_STANDALONE=1\*(C'\fR and providing your configuration in whatever way you want, you can also \f(CW\*(C`m4_include([libev.m4])\*(C'\fR in your \&\fIconfigure.ac\fR and leave \f(CW\*(C`EV_STANDALONE\*(C'\fR undefined. \fIev.c\fR will then include \fIconfig.h\fR and configure itself accordingly. .PP For this of course you need the m4 file: .PP .Vb 1 \& libev.m4 .Ve .SS "\s-1PREPROCESSOR SYMBOLS/MACROS\s0" .IX Subsection "PREPROCESSOR SYMBOLS/MACROS" Libev can be configured via a variety of preprocessor symbols you have to define before including (or compiling) any of its files. The default in the absence of autoconf is documented for every option. .PP Symbols marked with \*(L"(h)\*(R" do not change the \s-1ABI,\s0 and can have different values when compiling libev vs. including \fIev.h\fR, so it is permissible to redefine them before including \fIev.h\fR without breaking compatibility to a compiled library. All other symbols change the \s-1ABI,\s0 which means all users of libev and the libev code itself must be compiled with compatible settings. .IP "\s-1EV_COMPAT3\s0 (h)" 4 .IX Item "EV_COMPAT3 (h)" Backwards compatibility is a major concern for libev. This is why this release of libev comes with wrappers for the functions and symbols that have been renamed between libev version 3 and 4. .Sp You can disable these wrappers (to test compatibility with future versions) by defining \f(CW\*(C`EV_COMPAT3\*(C'\fR to \f(CW0\fR when compiling your sources. This has the additional advantage that you can drop the \f(CW\*(C`struct\*(C'\fR from \f(CW\*(C`struct ev_loop\*(C'\fR declarations, as libev will provide an \f(CW\*(C`ev_loop\*(C'\fR typedef in that case. .Sp In some future version, the default for \f(CW\*(C`EV_COMPAT3\*(C'\fR will become \f(CW0\fR, and in some even more future version the compatibility code will be removed completely. .IP "\s-1EV_STANDALONE\s0 (h)" 4 .IX Item "EV_STANDALONE (h)" Must always be \f(CW1\fR if you do not use autoconf configuration, which keeps libev from including \fIconfig.h\fR, and it also defines dummy implementations for some libevent functions (such as logging, which is not supported). It will also not define any of the structs usually found in \&\fIevent.h\fR that are not directly supported by the libev core alone. .Sp In standalone mode, libev will still try to automatically deduce the configuration, but has to be more conservative. .IP "\s-1EV_USE_FLOOR\s0" 4 .IX Item "EV_USE_FLOOR" If defined to be \f(CW1\fR, libev will use the \f(CW\*(C`floor ()\*(C'\fR function for its periodic reschedule calculations, otherwise libev will fall back on a portable (slower) implementation. If you enable this, you usually have to link against libm or something equivalent. Enabling this when the \f(CW\*(C`floor\*(C'\fR function is not available will fail, so the safe default is to not enable this. .IP "\s-1EV_USE_MONOTONIC\s0" 4 .IX Item "EV_USE_MONOTONIC" If defined to be \f(CW1\fR, libev will try to detect the availability of the monotonic clock option at both compile time and runtime. Otherwise no use of the monotonic clock option will be attempted. If you enable this, you usually have to link against librt or something similar. Enabling it when the functionality isn't available is safe, though, although you have to make sure you link against any libraries where the \f(CW\*(C`clock_gettime\*(C'\fR function is hiding in (often \fI\-lrt\fR). See also \f(CW\*(C`EV_USE_CLOCK_SYSCALL\*(C'\fR. .IP "\s-1EV_USE_REALTIME\s0" 4 .IX Item "EV_USE_REALTIME" If defined to be \f(CW1\fR, libev will try to detect the availability of the real-time clock option at compile time (and assume its availability at runtime if successful). Otherwise no use of the real-time clock option will be attempted. This effectively replaces \f(CW\*(C`gettimeofday\*(C'\fR by \f(CW\*(C`clock_get (CLOCK_REALTIME, ...)\*(C'\fR and will not normally affect correctness. See the note about libraries in the description of \&\f(CW\*(C`EV_USE_MONOTONIC\*(C'\fR, though. Defaults to the opposite value of \&\f(CW\*(C`EV_USE_CLOCK_SYSCALL\*(C'\fR. .IP "\s-1EV_USE_CLOCK_SYSCALL\s0" 4 .IX Item "EV_USE_CLOCK_SYSCALL" If defined to be \f(CW1\fR, libev will try to use a direct syscall instead of calling the system-provided \f(CW\*(C`clock_gettime\*(C'\fR function. This option exists because on GNU/Linux, \f(CW\*(C`clock_gettime\*(C'\fR is in \f(CW\*(C`librt\*(C'\fR, but \f(CW\*(C`librt\*(C'\fR unconditionally pulls in \f(CW\*(C`libpthread\*(C'\fR, slowing down single-threaded programs needlessly. Using a direct syscall is slightly slower (in theory), because no optimised vdso implementation can be used, but avoids the pthread dependency. Defaults to \f(CW1\fR on GNU/Linux with glibc 2.x or higher, as it simplifies linking (no need for \f(CW\*(C`\-lrt\*(C'\fR). .IP "\s-1EV_USE_NANOSLEEP\s0" 4 .IX Item "EV_USE_NANOSLEEP" If defined to be \f(CW1\fR, libev will assume that \f(CW\*(C`nanosleep ()\*(C'\fR is available and will use it for delays. Otherwise it will use \f(CW\*(C`select ()\*(C'\fR. .IP "\s-1EV_USE_EVENTFD\s0" 4 .IX Item "EV_USE_EVENTFD" If defined to be \f(CW1\fR, then libev will assume that \f(CW\*(C`eventfd ()\*(C'\fR is available and will probe for kernel support at runtime. This will improve \&\f(CW\*(C`ev_signal\*(C'\fR and \f(CW\*(C`ev_async\*(C'\fR performance and reduce resource consumption. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.7 or newer, otherwise disabled. .IP "\s-1EV_USE_SIGNALFD\s0" 4 .IX Item "EV_USE_SIGNALFD" If defined to be \f(CW1\fR, then libev will assume that \f(CW\*(C`signalfd ()\*(C'\fR is available and will probe for kernel support at runtime. This enables the use of \s-1EVFLAG_SIGNALFD\s0 for faster and simpler signal handling. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.7 or newer, otherwise disabled. .IP "\s-1EV_USE_TIMERFD\s0" 4 .IX Item "EV_USE_TIMERFD" If defined to be \f(CW1\fR, then libev will assume that \f(CW\*(C`timerfd ()\*(C'\fR is available and will probe for kernel support at runtime. This allows libev to detect time jumps accurately. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.8 or newer and define \&\f(CW\*(C`TFD_TIMER_CANCEL_ON_SET\*(C'\fR, otherwise disabled. .IP "\s-1EV_USE_EVENTFD\s0" 4 .IX Item "EV_USE_EVENTFD" If defined to be \f(CW1\fR, then libev will assume that \f(CW\*(C`eventfd ()\*(C'\fR is available and will probe for kernel support at runtime. This will improve \&\f(CW\*(C`ev_signal\*(C'\fR and \f(CW\*(C`ev_async\*(C'\fR performance and reduce resource consumption. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.7 or newer, otherwise disabled. .IP "\s-1EV_USE_SELECT\s0" 4 .IX Item "EV_USE_SELECT" If undefined or defined to be \f(CW1\fR, libev will compile in support for the \&\f(CW\*(C`select\*(C'\fR(2) backend. No attempt at auto-detection will be done: if no other method takes over, select will be it. Otherwise the select backend will not be compiled in. .IP "\s-1EV_SELECT_USE_FD_SET\s0" 4 .IX Item "EV_SELECT_USE_FD_SET" If defined to \f(CW1\fR, then the select backend will use the system \f(CW\*(C`fd_set\*(C'\fR structure. This is useful if libev doesn't compile due to a missing \&\f(CW\*(C`NFDBITS\*(C'\fR or \f(CW\*(C`fd_mask\*(C'\fR definition or it mis-guesses the bitset layout on exotic systems. This usually limits the range of file descriptors to some low limit such as 1024 or might have other limitations (winsocket only allows 64 sockets). The \f(CW\*(C`FD_SETSIZE\*(C'\fR macro, set before compilation, configures the maximum size of the \f(CW\*(C`fd_set\*(C'\fR. .IP "\s-1EV_SELECT_IS_WINSOCKET\s0" 4 .IX Item "EV_SELECT_IS_WINSOCKET" When defined to \f(CW1\fR, the select backend will assume that select/socket/connect etc. don't understand file descriptors but wants osf handles on win32 (this is the case when the select to be used is the winsock select). This means that it will call \&\f(CW\*(C`_get_osfhandle\*(C'\fR on the fd to convert it to an \s-1OS\s0 handle. Otherwise, it is assumed that all these functions actually work on fds, even on win32. Should not be defined on non\-win32 platforms. .IP "\s-1EV_FD_TO_WIN32_HANDLE\s0(fd)" 4 .IX Item "EV_FD_TO_WIN32_HANDLE(fd)" If \f(CW\*(C`EV_SELECT_IS_WINSOCKET\*(C'\fR is enabled, then libev needs a way to map file descriptors to socket handles. When not defining this symbol (the default), then libev will call \f(CW\*(C`_get_osfhandle\*(C'\fR, which is usually correct. In some cases, programs use their own file descriptor management, in which case they can provide this function to map fds to socket handles. .IP "\s-1EV_WIN32_HANDLE_TO_FD\s0(handle)" 4 .IX Item "EV_WIN32_HANDLE_TO_FD(handle)" If \f(CW\*(C`EV_SELECT_IS_WINSOCKET\*(C'\fR then libev maps handles to file descriptors using the standard \f(CW\*(C`_open_osfhandle\*(C'\fR function. For programs implementing their own fd to handle mapping, overwriting this function makes it easier to do so. This can be done by defining this macro to an appropriate value. .IP "\s-1EV_WIN32_CLOSE_FD\s0(fd)" 4 .IX Item "EV_WIN32_CLOSE_FD(fd)" If programs implement their own fd to handle mapping on win32, then this macro can be used to override the \f(CW\*(C`close\*(C'\fR function, useful to unregister file descriptors again. Note that the replacement function has to close the underlying \s-1OS\s0 handle. .IP "\s-1EV_USE_WSASOCKET\s0" 4 .IX Item "EV_USE_WSASOCKET" If defined to be \f(CW1\fR, libev will use \f(CW\*(C`WSASocket\*(C'\fR to create its internal communication socket, which works better in some environments. Otherwise, the normal \f(CW\*(C`socket\*(C'\fR function will be used, which works better in other environments. .IP "\s-1EV_USE_POLL\s0" 4 .IX Item "EV_USE_POLL" If defined to be \f(CW1\fR, libev will compile in support for the \f(CW\*(C`poll\*(C'\fR(2) backend. Otherwise it will be enabled on non\-win32 platforms. It takes precedence over select. .IP "\s-1EV_USE_EPOLL\s0" 4 .IX Item "EV_USE_EPOLL" If defined to be \f(CW1\fR, libev will compile in support for the Linux \&\f(CW\*(C`epoll\*(C'\fR(7) backend. Its availability will be detected at runtime, otherwise another method will be used as fallback. This is the preferred backend for GNU/Linux systems. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.4 or newer, otherwise disabled. .IP "\s-1EV_USE_LINUXAIO\s0" 4 .IX Item "EV_USE_LINUXAIO" If defined to be \f(CW1\fR, libev will compile in support for the Linux aio backend (\f(CW\*(C`EV_USE_EPOLL\*(C'\fR must also be enabled). If undefined, it will be enabled on linux, otherwise disabled. .IP "\s-1EV_USE_IOURING\s0" 4 .IX Item "EV_USE_IOURING" If defined to be \f(CW1\fR, libev will compile in support for the Linux io_uring backend (\f(CW\*(C`EV_USE_EPOLL\*(C'\fR must also be enabled). Due to it's current limitations it has to be requested explicitly. If undefined, it will be enabled on linux, otherwise disabled. .IP "\s-1EV_USE_KQUEUE\s0" 4 .IX Item "EV_USE_KQUEUE" If defined to be \f(CW1\fR, libev will compile in support for the \s-1BSD\s0 style \&\f(CW\*(C`kqueue\*(C'\fR(2) backend. Its actual availability will be detected at runtime, otherwise another method will be used as fallback. This is the preferred backend for \s-1BSD\s0 and BSD-like systems, although on most BSDs kqueue only supports some types of fds correctly (the only platform we found that supports ptys for example was NetBSD), so kqueue might be compiled in, but not be used unless explicitly requested. The best way to use it is to find out whether kqueue supports your type of fd properly and use an embedded kqueue loop. .IP "\s-1EV_USE_PORT\s0" 4 .IX Item "EV_USE_PORT" If defined to be \f(CW1\fR, libev will compile in support for the Solaris 10 port style backend. Its availability will be detected at runtime, otherwise another method will be used as fallback. This is the preferred backend for Solaris 10 systems. .IP "\s-1EV_USE_DEVPOLL\s0" 4 .IX Item "EV_USE_DEVPOLL" Reserved for future expansion, works like the \s-1USE\s0 symbols above. .IP "\s-1EV_USE_INOTIFY\s0" 4 .IX Item "EV_USE_INOTIFY" If defined to be \f(CW1\fR, libev will compile in support for the Linux inotify interface to speed up \f(CW\*(C`ev_stat\*(C'\fR watchers. Its actual availability will be detected at runtime. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.4 or newer, otherwise disabled. .IP "\s-1EV_NO_SMP\s0" 4 .IX Item "EV_NO_SMP" If defined to be \f(CW1\fR, libev will assume that memory is always coherent between threads, that is, threads can be used, but threads never run on different cpus (or different cpu cores). This reduces dependencies and makes libev faster. .IP "\s-1EV_NO_THREADS\s0" 4 .IX Item "EV_NO_THREADS" If defined to be \f(CW1\fR, libev will assume that it will never be called from different threads (that includes signal handlers), which is a stronger assumption than \f(CW\*(C`EV_NO_SMP\*(C'\fR, above. This reduces dependencies and makes libev faster. .IP "\s-1EV_ATOMIC_T\s0" 4 .IX Item "EV_ATOMIC_T" Libev requires an integer type (suitable for storing \f(CW0\fR or \f(CW1\fR) whose access is atomic with respect to other threads or signal contexts. No such type is easily found in the C language, so you can provide your own type that you know is safe for your purposes. It is used both for signal handler \*(L"locking\*(R" as well as for signal and thread safety in \f(CW\*(C`ev_async\*(C'\fR watchers. .Sp In the absence of this define, libev will use \f(CW\*(C`sig_atomic_t volatile\*(C'\fR (from \fIsignal.h\fR), which is usually good enough on most platforms. .IP "\s-1EV_H\s0 (h)" 4 .IX Item "EV_H (h)" The name of the \fIev.h\fR header file used to include it. The default if undefined is \f(CW"ev.h"\fR in \fIevent.h\fR, \fIev.c\fR and \fIev++.h\fR. This can be used to virtually rename the \fIev.h\fR header file in case of conflicts. .IP "\s-1EV_CONFIG_H\s0 (h)" 4 .IX Item "EV_CONFIG_H (h)" If \f(CW\*(C`EV_STANDALONE\*(C'\fR isn't \f(CW1\fR, this variable can be used to override \&\fIev.c\fR's idea of where to find the \fIconfig.h\fR file, similarly to \&\f(CW\*(C`EV_H\*(C'\fR, above. .IP "\s-1EV_EVENT_H\s0 (h)" 4 .IX Item "EV_EVENT_H (h)" Similarly to \f(CW\*(C`EV_H\*(C'\fR, this macro can be used to override \fIevent.c\fR's idea of how the \fIevent.h\fR header can be found, the default is \f(CW"event.h"\fR. .IP "\s-1EV_PROTOTYPES\s0 (h)" 4 .IX Item "EV_PROTOTYPES (h)" If defined to be \f(CW0\fR, then \fIev.h\fR will not define any function prototypes, but still define all the structs and other symbols. This is occasionally useful if you want to provide your own wrapper functions around libev functions. .IP "\s-1EV_MULTIPLICITY\s0" 4 .IX Item "EV_MULTIPLICITY" If undefined or defined to \f(CW1\fR, then all event-loop-specific functions will have the \f(CW\*(C`struct ev_loop *\*(C'\fR as first argument, and you can create additional independent event loops. Otherwise there will be no support for multiple event loops and there is no first event loop pointer argument. Instead, all functions act on the single default loop. .Sp Note that \f(CW\*(C`EV_DEFAULT\*(C'\fR and \f(CW\*(C`EV_DEFAULT_\*(C'\fR will no longer provide a default loop when multiplicity is switched off \- you always have to initialise the loop manually in this case. .IP "\s-1EV_MINPRI\s0" 4 .IX Item "EV_MINPRI" .PD 0 .IP "\s-1EV_MAXPRI\s0" 4 .IX Item "EV_MAXPRI" .PD The range of allowed priorities. \f(CW\*(C`EV_MINPRI\*(C'\fR must be smaller or equal to \&\f(CW\*(C`EV_MAXPRI\*(C'\fR, but otherwise there are no non-obvious limitations. You can provide for more priorities by overriding those symbols (usually defined to be \f(CW\*(C`\-2\*(C'\fR and \f(CW2\fR, respectively). .Sp When doing priority-based operations, libev usually has to linearly search all the priorities, so having many of them (hundreds) uses a lot of space and time, so using the defaults of five priorities (\-2 .. +2) is usually fine. .Sp If your embedding application does not need any priorities, defining these both to \f(CW0\fR will save some memory and \s-1CPU.\s0 .IP "\s-1EV_PERIODIC_ENABLE, EV_IDLE_ENABLE, EV_EMBED_ENABLE, EV_STAT_ENABLE, EV_PREPARE_ENABLE, EV_CHECK_ENABLE, EV_FORK_ENABLE, EV_SIGNAL_ENABLE, EV_ASYNC_ENABLE, EV_CHILD_ENABLE.\s0" 4 .IX Item "EV_PERIODIC_ENABLE, EV_IDLE_ENABLE, EV_EMBED_ENABLE, EV_STAT_ENABLE, EV_PREPARE_ENABLE, EV_CHECK_ENABLE, EV_FORK_ENABLE, EV_SIGNAL_ENABLE, EV_ASYNC_ENABLE, EV_CHILD_ENABLE." If undefined or defined to be \f(CW1\fR (and the platform supports it), then the respective watcher type is supported. If defined to be \f(CW0\fR, then it is not. Disabling watcher types mainly saves code size. .IP "\s-1EV_FEATURES\s0" 4 .IX Item "EV_FEATURES" If you need to shave off some kilobytes of code at the expense of some speed (but with the full \s-1API\s0), you can define this symbol to request certain subsets of functionality. The default is to enable all features that can be enabled on the platform. .Sp A typical way to use this symbol is to define it to \f(CW0\fR (or to a bitset with some broad features you want) and then selectively re-enable additional parts you want, for example if you want everything minimal, but multiple event loop support, async and child watchers and the poll backend, use this: .Sp .Vb 5 \& #define EV_FEATURES 0 \& #define EV_MULTIPLICITY 1 \& #define EV_USE_POLL 1 \& #define EV_CHILD_ENABLE 1 \& #define EV_ASYNC_ENABLE 1 .Ve .Sp The actual value is a bitset, it can be a combination of the following values (by default, all of these are enabled): .RS 4 .ie n .IP "1 \- faster/larger code" 4 .el .IP "\f(CW1\fR \- faster/larger code" 4 .IX Item "1 - faster/larger code" Use larger code to speed up some operations. .Sp Currently this is used to override some inlining decisions (enlarging the code size by roughly 30% on amd64). .Sp When optimising for size, use of compiler flags such as \f(CW\*(C`\-Os\*(C'\fR with gcc is recommended, as well as \f(CW\*(C`\-DNDEBUG\*(C'\fR, as libev contains a number of assertions. .Sp The default is off when \f(CW\*(C`_\|_OPTIMIZE_SIZE_\|_\*(C'\fR is defined by your compiler (e.g. gcc with \f(CW\*(C`\-Os\*(C'\fR). .ie n .IP "2 \- faster/larger data structures" 4 .el .IP "\f(CW2\fR \- faster/larger data structures" 4 .IX Item "2 - faster/larger data structures" Replaces the small 2\-heap for timer management by a faster 4\-heap, larger hash table sizes and so on. This will usually further increase code size and can additionally have an effect on the size of data structures at runtime. .Sp The default is off when \f(CW\*(C`_\|_OPTIMIZE_SIZE_\|_\*(C'\fR is defined by your compiler (e.g. gcc with \f(CW\*(C`\-Os\*(C'\fR). .ie n .IP "4 \- full \s-1API\s0 configuration" 4 .el .IP "\f(CW4\fR \- full \s-1API\s0 configuration" 4 .IX Item "4 - full API configuration" This enables priorities (sets \f(CW\*(C`EV_MAXPRI\*(C'\fR=2 and \f(CW\*(C`EV_MINPRI\*(C'\fR=\-2), and enables multiplicity (\f(CW\*(C`EV_MULTIPLICITY\*(C'\fR=1). .ie n .IP "8 \- full \s-1API\s0" 4 .el .IP "\f(CW8\fR \- full \s-1API\s0" 4 .IX Item "8 - full API" This enables a lot of the \*(L"lesser used\*(R" \s-1API\s0 functions. See \f(CW\*(C`ev.h\*(C'\fR for details on which parts of the \s-1API\s0 are still available without this feature, and do not complain if this subset changes over time. .ie n .IP "16 \- enable all optional watcher types" 4 .el .IP "\f(CW16\fR \- enable all optional watcher types" 4 .IX Item "16 - enable all optional watcher types" Enables all optional watcher types. If you want to selectively enable only some watcher types other than I/O and timers (e.g. prepare, embed, async, child...) you can enable them manually by defining \&\f(CW\*(C`EV_watchertype_ENABLE\*(C'\fR to \f(CW1\fR instead. .ie n .IP "32 \- enable all backends" 4 .el .IP "\f(CW32\fR \- enable all backends" 4 .IX Item "32 - enable all backends" This enables all backends \- without this feature, you need to enable at least one backend manually (\f(CW\*(C`EV_USE_SELECT\*(C'\fR is a good choice). .ie n .IP "64 \- enable OS-specific ""helper"" APIs" 4 .el .IP "\f(CW64\fR \- enable OS-specific ``helper'' APIs" 4 .IX Item "64 - enable OS-specific helper APIs" Enable inotify, eventfd, signalfd and similar OS-specific helper APIs by default. .RE .RS 4 .Sp Compiling with \f(CW\*(C`gcc \-Os \-DEV_STANDALONE \-DEV_USE_EPOLL=1 \-DEV_FEATURES=0\*(C'\fR reduces the compiled size of libev from 24.7Kb code/2.8Kb data to 6.5Kb code/0.3Kb data on my GNU/Linux amd64 system, while still giving you I/O watchers, timers and monotonic clock support. .Sp With an intelligent-enough linker (gcc+binutils are intelligent enough when you use \f(CW\*(C`\-Wl,\-\-gc\-sections \-ffunction\-sections\*(C'\fR) functions unused by your program might be left out as well \- a binary starting a timer and an I/O watcher then might come out at only 5Kb. .RE .IP "\s-1EV_API_STATIC\s0" 4 .IX Item "EV_API_STATIC" If this symbol is defined (by default it is not), then all identifiers will have static linkage. This means that libev will not export any identifiers, and you cannot link against libev anymore. This can be useful when you embed libev, only want to use libev functions in a single file, and do not want its identifiers to be visible. .Sp To use this, define \f(CW\*(C`EV_API_STATIC\*(C'\fR and include \fIev.c\fR in the file that wants to use libev. .Sp This option only works when libev is compiled with a C compiler, as \*(C+ doesn't support the required declaration syntax. .IP "\s-1EV_AVOID_STDIO\s0" 4 .IX Item "EV_AVOID_STDIO" If this is set to \f(CW1\fR at compiletime, then libev will avoid using stdio functions (printf, scanf, perror etc.). This will increase the code size somewhat, but if your program doesn't otherwise depend on stdio and your libc allows it, this avoids linking in the stdio library which is quite big. .Sp Note that error messages might become less precise when this option is enabled. .IP "\s-1EV_NSIG\s0" 4 .IX Item "EV_NSIG" The highest supported signal number, +1 (or, the number of signals): Normally, libev tries to deduce the maximum number of signals automatically, but sometimes this fails, in which case it can be specified. Also, using a lower number than detected (\f(CW32\fR should be good for about any system in existence) can save some memory, as libev statically allocates some 12\-24 bytes per signal number. .IP "\s-1EV_PID_HASHSIZE\s0" 4 .IX Item "EV_PID_HASHSIZE" \&\f(CW\*(C`ev_child\*(C'\fR watchers use a small hash table to distribute workload by pid. The default size is \f(CW16\fR (or \f(CW1\fR with \f(CW\*(C`EV_FEATURES\*(C'\fR disabled), usually more than enough. If you need to manage thousands of children you might want to increase this value (\fImust\fR be a power of two). .IP "\s-1EV_INOTIFY_HASHSIZE\s0" 4 .IX Item "EV_INOTIFY_HASHSIZE" \&\f(CW\*(C`ev_stat\*(C'\fR watchers use a small hash table to distribute workload by inotify watch id. The default size is \f(CW16\fR (or \f(CW1\fR with \f(CW\*(C`EV_FEATURES\*(C'\fR disabled), usually more than enough. If you need to manage thousands of \&\f(CW\*(C`ev_stat\*(C'\fR watchers you might want to increase this value (\fImust\fR be a power of two). .IP "\s-1EV_USE_4HEAP\s0" 4 .IX Item "EV_USE_4HEAP" Heaps are not very cache-efficient. To improve the cache-efficiency of the timer and periodics heaps, libev uses a 4\-heap when this symbol is defined to \f(CW1\fR. The 4\-heap uses more complicated (longer) code but has noticeably faster performance with many (thousands) of watchers. .Sp The default is \f(CW1\fR, unless \f(CW\*(C`EV_FEATURES\*(C'\fR overrides it, in which case it will be \f(CW0\fR. .IP "\s-1EV_HEAP_CACHE_AT\s0" 4 .IX Item "EV_HEAP_CACHE_AT" Heaps are not very cache-efficient. To improve the cache-efficiency of the timer and periodics heaps, libev can cache the timestamp (\fIat\fR) within the heap structure (selected by defining \f(CW\*(C`EV_HEAP_CACHE_AT\*(C'\fR to \f(CW1\fR), which uses 8\-12 bytes more per watcher and a few hundred bytes more code, but avoids random read accesses on heap changes. This improves performance noticeably with many (hundreds) of watchers. .Sp The default is \f(CW1\fR, unless \f(CW\*(C`EV_FEATURES\*(C'\fR overrides it, in which case it will be \f(CW0\fR. .IP "\s-1EV_VERIFY\s0" 4 .IX Item "EV_VERIFY" Controls how much internal verification (see \f(CW\*(C`ev_verify ()\*(C'\fR) will be done: If set to \f(CW0\fR, no internal verification code will be compiled in. If set to \f(CW1\fR, then verification code will be compiled in, but not called. If set to \f(CW2\fR, then the internal verification code will be called once per loop, which can slow down libev. If set to \f(CW3\fR, then the verification code will be called very frequently, which will slow down libev considerably. .Sp Verification errors are reported via C's \f(CW\*(C`assert\*(C'\fR mechanism, so if you disable that (e.g. by defining \f(CW\*(C`NDEBUG\*(C'\fR) then no errors will be reported. .Sp The default is \f(CW1\fR, unless \f(CW\*(C`EV_FEATURES\*(C'\fR overrides it, in which case it will be \f(CW0\fR. .IP "\s-1EV_COMMON\s0" 4 .IX Item "EV_COMMON" By default, all watchers have a \f(CW\*(C`void *data\*(C'\fR member. By redefining this macro to something else you can include more and other types of members. You have to define it each time you include one of the files, though, and it must be identical each time. .Sp For example, the perl \s-1EV\s0 module uses something like this: .Sp .Vb 3 \& #define EV_COMMON \e \& SV *self; /* contains this struct */ \e \& SV *cb_sv, *fh /* note no trailing ";" */ .Ve .IP "\s-1EV_CB_DECLARE\s0 (type)" 4 .IX Item "EV_CB_DECLARE (type)" .PD 0 .IP "\s-1EV_CB_INVOKE\s0 (watcher, revents)" 4 .IX Item "EV_CB_INVOKE (watcher, revents)" .IP "ev_set_cb (ev, cb)" 4 .IX Item "ev_set_cb (ev, cb)" .PD Can be used to change the callback member declaration in each watcher, and the way callbacks are invoked and set. Must expand to a struct member definition and a statement, respectively. See the \fIev.h\fR header file for their default definitions. One possible use for overriding these is to avoid the \f(CW\*(C`struct ev_loop *\*(C'\fR as first argument in all cases, or to use method calls instead of plain function calls in \*(C+. .SS "\s-1EXPORTED API SYMBOLS\s0" .IX Subsection "EXPORTED API SYMBOLS" If you need to re-export the \s-1API\s0 (e.g. via a \s-1DLL\s0) and you need a list of exported symbols, you can use the provided \fISymbol.*\fR files which list all public symbols, one per line: .PP .Vb 2 \& Symbols.ev for libev proper \& Symbols.event for the libevent emulation .Ve .PP This can also be used to rename all public symbols to avoid clashes with multiple versions of libev linked together (which is obviously bad in itself, but sometimes it is inconvenient to avoid this). .PP A sed command like this will create wrapper \f(CW\*(C`#define\*(C'\fR's that you need to include before including \fIev.h\fR: .PP .Vb 1 \& wrap.h .Ve .PP This would create a file \fIwrap.h\fR which essentially looks like this: .PP .Vb 4 \& #define ev_backend myprefix_ev_backend \& #define ev_check_start myprefix_ev_check_start \& #define ev_check_stop myprefix_ev_check_stop \& ... .Ve .SS "\s-1EXAMPLES\s0" .IX Subsection "EXAMPLES" For a real-world example of a program the includes libev verbatim, you can have a look at the \s-1EV\s0 perl module (). It has the libev files in the \fIlibev/\fR subdirectory and includes them in the \fI\s-1EV/EVAPI\s0.h\fR (public interface) and \fI\s-1EV\s0.xs\fR (implementation) files. Only the \fI\s-1EV\s0.xs\fR file will be compiled. It is pretty complex because it provides its own header file. .PP The usage in rxvt-unicode is simpler. It has a \fIev_cpp.h\fR header file that everybody includes and which overrides some configure choices: .PP .Vb 8 \& #define EV_FEATURES 8 \& #define EV_USE_SELECT 1 \& #define EV_PREPARE_ENABLE 1 \& #define EV_IDLE_ENABLE 1 \& #define EV_SIGNAL_ENABLE 1 \& #define EV_CHILD_ENABLE 1 \& #define EV_USE_STDEXCEPT 0 \& #define EV_CONFIG_H \& \& #include "ev++.h" .Ve .PP And a \fIev_cpp.C\fR implementation file that contains libev proper and is compiled: .PP .Vb 2 \& #include "ev_cpp.h" \& #include "ev.c" .Ve .SH "INTERACTION WITH OTHER PROGRAMS, LIBRARIES OR THE ENVIRONMENT" .IX Header "INTERACTION WITH OTHER PROGRAMS, LIBRARIES OR THE ENVIRONMENT" .SS "\s-1THREADS AND COROUTINES\s0" .IX Subsection "THREADS AND COROUTINES" \fI\s-1THREADS\s0\fR .IX Subsection "THREADS" .PP All libev functions are reentrant and thread-safe unless explicitly documented otherwise, but libev implements no locking itself. This means that you can use as many loops as you want in parallel, as long as there are no concurrent calls into any libev function with the same loop parameter (\f(CW\*(C`ev_default_*\*(C'\fR calls have an implicit default loop parameter, of course): libev guarantees that different event loops share no data structures that need any locking. .PP Or to put it differently: calls with different loop parameters can be done concurrently from multiple threads, calls with the same loop parameter must be done serially (but can be done from different threads, as long as only one thread ever is inside a call at any point in time, e.g. by using a mutex per loop). .PP Specifically to support threads (and signal handlers), libev implements so-called \f(CW\*(C`ev_async\*(C'\fR watchers, which allow some limited form of concurrency on the same event loop, namely waking it up \*(L"from the outside\*(R". .PP If you want to know which design (one loop, locking, or multiple loops without or something else still) is best for your problem, then I cannot help you, but here is some generic advice: .IP "\(bu" 4 most applications have a main thread: use the default libev loop in that thread, or create a separate thread running only the default loop. .Sp This helps integrating other libraries or software modules that use libev themselves and don't care/know about threading. .IP "\(bu" 4 one loop per thread is usually a good model. .Sp Doing this is almost never wrong, sometimes a better-performance model exists, but it is always a good start. .IP "\(bu" 4 other models exist, such as the leader/follower pattern, where one loop is handed through multiple threads in a kind of round-robin fashion. .Sp Choosing a model is hard \- look around, learn, know that usually you can do better than you currently do :\-) .IP "\(bu" 4 often you need to talk to some other thread which blocks in the event loop. .Sp \&\f(CW\*(C`ev_async\*(C'\fR watchers can be used to wake them up from other threads safely (or from signal contexts...). .Sp An example use would be to communicate signals or other events that only work in the default loop by registering the signal watcher with the default loop and triggering an \f(CW\*(C`ev_async\*(C'\fR watcher from the default loop watcher callback into the event loop interested in the signal. .PP See also \*(L"\s-1THREAD LOCKING EXAMPLE\*(R"\s0. .PP \fI\s-1COROUTINES\s0\fR .IX Subsection "COROUTINES" .PP Libev is very accommodating to coroutines (\*(L"cooperative threads\*(R"): libev fully supports nesting calls to its functions from different coroutines (e.g. you can call \f(CW\*(C`ev_run\*(C'\fR on the same loop from two different coroutines, and switch freely between both coroutines running the loop, as long as you don't confuse yourself). The only exception is that you must not do this from \f(CW\*(C`ev_periodic\*(C'\fR reschedule callbacks. .PP Care has been taken to ensure that libev does not keep local state inside \&\f(CW\*(C`ev_run\*(C'\fR, and other calls do not usually allow for coroutine switches as they do not call any callbacks. .SS "\s-1COMPILER WARNINGS\s0" .IX Subsection "COMPILER WARNINGS" Depending on your compiler and compiler settings, you might get no or a lot of warnings when compiling libev code. Some people are apparently scared by this. .PP However, these are unavoidable for many reasons. For one, each compiler has different warnings, and each user has different tastes regarding warning options. \*(L"Warn-free\*(R" code therefore cannot be a goal except when targeting a specific compiler and compiler-version. .PP Another reason is that some compiler warnings require elaborate workarounds, or other changes to the code that make it less clear and less maintainable. .PP And of course, some compiler warnings are just plain stupid, or simply wrong (because they don't actually warn about the condition their message seems to warn about). For example, certain older gcc versions had some warnings that resulted in an extreme number of false positives. These have been fixed, but some people still insist on making code warn-free with such buggy versions. .PP While libev is written to generate as few warnings as possible, \&\*(L"warn-free\*(R" code is not a goal, and it is recommended not to build libev with any compiler warnings enabled unless you are prepared to cope with them (e.g. by ignoring them). Remember that warnings are just that: warnings, not errors, or proof of bugs. .SS "\s-1VALGRIND\s0" .IX Subsection "VALGRIND" Valgrind has a special section here because it is a popular tool that is highly useful. Unfortunately, valgrind reports are very hard to interpret. .PP If you think you found a bug (memory leak, uninitialised data access etc.) in libev, then check twice: If valgrind reports something like: .PP .Vb 3 \& ==2274== definitely lost: 0 bytes in 0 blocks. \& ==2274== possibly lost: 0 bytes in 0 blocks. \& ==2274== still reachable: 256 bytes in 1 blocks. .Ve .PP Then there is no memory leak, just as memory accounted to global variables is not a memleak \- the memory is still being referenced, and didn't leak. .PP Similarly, under some circumstances, valgrind might report kernel bugs as if it were a bug in libev (e.g. in realloc or in the poll backend, although an acceptable workaround has been found here), or it might be confused. .PP Keep in mind that valgrind is a very good tool, but only a tool. Don't make it into some kind of religion. .PP If you are unsure about something, feel free to contact the mailing list with the full valgrind report and an explanation on why you think this is a bug in libev (best check the archives, too :). However, don't be annoyed when you get a brisk \*(L"this is no bug\*(R" answer and take the chance of learning how to interpret valgrind properly. .PP If you need, for some reason, empty reports from valgrind for your project I suggest using suppression lists. .SH "PORTABILITY NOTES" .IX Header "PORTABILITY NOTES" .SS "\s-1GNU/LINUX 32 BIT LIMITATIONS\s0" .IX Subsection "GNU/LINUX 32 BIT LIMITATIONS" GNU/Linux is the only common platform that supports 64 bit file/large file interfaces but \fIdisables\fR them by default. .PP That means that libev compiled in the default environment doesn't support files larger than 2GiB or so, which mainly affects \f(CW\*(C`ev_stat\*(C'\fR watchers. .PP Unfortunately, many programs try to work around this GNU/Linux issue by enabling the large file \s-1API,\s0 which makes them incompatible with the standard libev compiled for their system. .PP Likewise, libev cannot enable the large file \s-1API\s0 itself as this would suddenly make it incompatible to the default compile time environment, i.e. all programs not using special compile switches. .SS "\s-1OS/X AND DARWIN BUGS\s0" .IX Subsection "OS/X AND DARWIN BUGS" The whole thing is a bug if you ask me \- basically any system interface you touch is broken, whether it is locales, poll, kqueue or even the OpenGL drivers. .PP \fI\f(CI\*(C`kqueue\*(C'\fI is buggy\fR .IX Subsection "kqueue is buggy" .PP The kqueue syscall is broken in all known versions \- most versions support only sockets, many support pipes. .PP Libev tries to work around this by not using \f(CW\*(C`kqueue\*(C'\fR by default on this rotten platform, but of course you can still ask for it when creating a loop \- embedding a socket-only kqueue loop into a select-based one is probably going to work well. .PP \fI\f(CI\*(C`poll\*(C'\fI is buggy\fR .IX Subsection "poll is buggy" .PP Instead of fixing \f(CW\*(C`kqueue\*(C'\fR, Apple replaced their (working) \f(CW\*(C`poll\*(C'\fR implementation by something calling \f(CW\*(C`kqueue\*(C'\fR internally around the 10.5.6 release, so now \f(CW\*(C`kqueue\*(C'\fR \fIand\fR \f(CW\*(C`poll\*(C'\fR are broken. .PP Libev tries to work around this by not using \f(CW\*(C`poll\*(C'\fR by default on this rotten platform, but of course you can still ask for it when creating a loop. .PP \fI\f(CI\*(C`select\*(C'\fI is buggy\fR .IX Subsection "select is buggy" .PP All that's left is \f(CW\*(C`select\*(C'\fR, and of course Apple found a way to fuck this one up as well: On \s-1OS/X,\s0 \f(CW\*(C`select\*(C'\fR actively limits the number of file descriptors you can pass in to 1024 \- your program suddenly crashes when you use more. .PP There is an undocumented \*(L"workaround\*(R" for this \- defining \&\f(CW\*(C`_DARWIN_UNLIMITED_SELECT\*(C'\fR, which libev tries to use, so select \fIshould\fR work on \s-1OS/X.\s0 .SS "\s-1SOLARIS PROBLEMS AND WORKAROUNDS\s0" .IX Subsection "SOLARIS PROBLEMS AND WORKAROUNDS" \fI\f(CI\*(C`errno\*(C'\fI reentrancy\fR .IX Subsection "errno reentrancy" .PP The default compile environment on Solaris is unfortunately so thread-unsafe that you can't even use components/libraries compiled without \f(CW\*(C`\-D_REENTRANT\*(C'\fR in a threaded program, which, of course, isn't defined by default. A valid, if stupid, implementation choice. .PP If you want to use libev in threaded environments you have to make sure it's compiled with \f(CW\*(C`_REENTRANT\*(C'\fR defined. .PP \fIEvent port backend\fR .IX Subsection "Event port backend" .PP The scalable event interface for Solaris is called \*(L"event ports\*(R". Unfortunately, this mechanism is very buggy in all major releases. If you run into high \s-1CPU\s0 usage, your program freezes or you get a large number of spurious wakeups, make sure you have all the relevant and latest kernel patches applied. No, I don't know which ones, but there are multiple ones to apply, and afterwards, event ports actually work great. .PP If you can't get it to work, you can try running the program by setting the environment variable \f(CW\*(C`LIBEV_FLAGS=3\*(C'\fR to only allow \f(CW\*(C`poll\*(C'\fR and \&\f(CW\*(C`select\*(C'\fR backends. .SS "\s-1AIX POLL BUG\s0" .IX Subsection "AIX POLL BUG" \&\s-1AIX\s0 unfortunately has a broken \f(CW\*(C`poll.h\*(C'\fR header. Libev works around this by trying to avoid the poll backend altogether (i.e. it's not even compiled in), which normally isn't a big problem as \f(CW\*(C`select\*(C'\fR works fine with large bitsets on \s-1AIX,\s0 and \s-1AIX\s0 is dead anyway. .SS "\s-1WIN32 PLATFORM LIMITATIONS AND WORKAROUNDS\s0" .IX Subsection "WIN32 PLATFORM LIMITATIONS AND WORKAROUNDS" \fIGeneral issues\fR .IX Subsection "General issues" .PP Win32 doesn't support any of the standards (e.g. \s-1POSIX\s0) that libev requires, and its I/O model is fundamentally incompatible with the \s-1POSIX\s0 model. Libev still offers limited functionality on this platform in the form of the \f(CW\*(C`EVBACKEND_SELECT\*(C'\fR backend, and only supports socket descriptors. This only applies when using Win32 natively, not when using e.g. cygwin. Actually, it only applies to the microsofts own compilers, as every compiler comes with a slightly differently broken/incompatible environment. .PP Lifting these limitations would basically require the full re-implementation of the I/O system. If you are into this kind of thing, then note that glib does exactly that for you in a very portable way (note also that glib is the slowest event library known to man). .PP There is no supported compilation method available on windows except embedding it into other applications. .PP Sensible signal handling is officially unsupported by Microsoft \- libev tries its best, but under most conditions, signals will simply not work. .PP Not a libev limitation but worth mentioning: windows apparently doesn't accept large writes: instead of resulting in a partial write, windows will either accept everything or return \f(CW\*(C`ENOBUFS\*(C'\fR if the buffer is too large, so make sure you only write small amounts into your sockets (less than a megabyte seems safe, but this apparently depends on the amount of memory available). .PP Due to the many, low, and arbitrary limits on the win32 platform and the abysmal performance of winsockets, using a large number of sockets is not recommended (and not reasonable). If your program needs to use more than a hundred or so sockets, then likely it needs to use a totally different implementation for windows, as libev offers the \s-1POSIX\s0 readiness notification model, which cannot be implemented efficiently on windows (due to Microsoft monopoly games). .PP A typical way to use libev under windows is to embed it (see the embedding section for details) and use the following \fIevwrap.h\fR header file instead of \fIev.h\fR: .PP .Vb 2 \& #define EV_STANDALONE /* keeps ev from requiring config.h */ \& #define EV_SELECT_IS_WINSOCKET 1 /* configure libev for windows select */ \& \& #include "ev.h" .Ve .PP And compile the following \fIevwrap.c\fR file into your project (make sure you do \fInot\fR compile the \fIev.c\fR or any other embedded source files!): .PP .Vb 2 \& #include "evwrap.h" \& #include "ev.c" .Ve .PP \fIThe winsocket \f(CI\*(C`select\*(C'\fI function\fR .IX Subsection "The winsocket select function" .PP The winsocket \f(CW\*(C`select\*(C'\fR function doesn't follow \s-1POSIX\s0 in that it requires socket \fIhandles\fR and not socket \fIfile descriptors\fR (it is also extremely buggy). This makes select very inefficient, and also requires a mapping from file descriptors to socket handles (the Microsoft C runtime provides the function \f(CW\*(C`_open_osfhandle\*(C'\fR for this). See the discussion of the \f(CW\*(C`EV_SELECT_USE_FD_SET\*(C'\fR, \f(CW\*(C`EV_SELECT_IS_WINSOCKET\*(C'\fR and \&\f(CW\*(C`EV_FD_TO_WIN32_HANDLE\*(C'\fR preprocessor symbols for more info. .PP The configuration for a \*(L"naked\*(R" win32 using the Microsoft runtime libraries and raw winsocket select is: .PP .Vb 2 \& #define EV_USE_SELECT 1 \& #define EV_SELECT_IS_WINSOCKET 1 /* forces EV_SELECT_USE_FD_SET, too */ .Ve .PP Note that winsockets handling of fd sets is O(n), so you can easily get a complexity in the O(nX) range when using win32. .PP \fILimited number of file descriptors\fR .IX Subsection "Limited number of file descriptors" .PP Windows has numerous arbitrary (and low) limits on things. .PP Early versions of winsocket's select only supported waiting for a maximum of \f(CW64\fR handles (probably owning to the fact that all windows kernels can only wait for \f(CW64\fR things at the same time internally; Microsoft recommends spawning a chain of threads and wait for 63 handles and the previous thread in each. Sounds great!). .PP Newer versions support more handles, but you need to define \f(CW\*(C`FD_SETSIZE\*(C'\fR to some high number (e.g. \f(CW2048\fR) before compiling the winsocket select call (which might be in libev or elsewhere, for example, perl and many other interpreters do their own select emulation on windows). .PP Another limit is the number of file descriptors in the Microsoft runtime libraries, which by default is \f(CW64\fR (there must be a hidden \fI64\fR fetish or something like this inside Microsoft). You can increase this by calling \f(CW\*(C`_setmaxstdio\*(C'\fR, which can increase this limit to \f(CW2048\fR (another arbitrary limit), but is broken in many versions of the Microsoft runtime libraries. This might get you to about \f(CW512\fR or \f(CW2048\fR sockets (depending on windows version and/or the phase of the moon). To get more, you need to wrap all I/O functions and provide your own fd management, but the cost of calling select (O(nX)) will likely make this unworkable. .SS "\s-1PORTABILITY REQUIREMENTS\s0" .IX Subsection "PORTABILITY REQUIREMENTS" In addition to a working ISO-C implementation and of course the backend-specific APIs, libev relies on a few additional extensions: .ie n .IP """void (*)(ev_watcher_type *, int revents)"" must have compatible calling conventions regardless of ""ev_watcher_type *""." 4 .el .IP "\f(CWvoid (*)(ev_watcher_type *, int revents)\fR must have compatible calling conventions regardless of \f(CWev_watcher_type *\fR." 4 .IX Item "void (*)(ev_watcher_type *, int revents) must have compatible calling conventions regardless of ev_watcher_type *." Libev assumes not only that all watcher pointers have the same internal structure (guaranteed by \s-1POSIX\s0 but not by \s-1ISO C\s0 for example), but it also assumes that the same (machine) code can be used to call any watcher callback: The watcher callbacks have different type signatures, but libev calls them using an \f(CW\*(C`ev_watcher *\*(C'\fR internally. .IP "null pointers and integer zero are represented by 0 bytes" 4 .IX Item "null pointers and integer zero are represented by 0 bytes" Libev uses \f(CW\*(C`memset\*(C'\fR to initialise structs and arrays to \f(CW0\fR bytes, and relies on this setting pointers and integers to null. .IP "pointer accesses must be thread-atomic" 4 .IX Item "pointer accesses must be thread-atomic" Accessing a pointer value must be atomic, it must both be readable and writable in one piece \- this is the case on all current architectures. .ie n .IP """sig_atomic_t volatile"" must be thread-atomic as well" 4 .el .IP "\f(CWsig_atomic_t volatile\fR must be thread-atomic as well" 4 .IX Item "sig_atomic_t volatile must be thread-atomic as well" The type \f(CW\*(C`sig_atomic_t volatile\*(C'\fR (or whatever is defined as \&\f(CW\*(C`EV_ATOMIC_T\*(C'\fR) must be atomic with respect to accesses from different threads. This is not part of the specification for \f(CW\*(C`sig_atomic_t\*(C'\fR, but is believed to be sufficiently portable. .ie n .IP """sigprocmask"" must work in a threaded environment" 4 .el .IP "\f(CWsigprocmask\fR must work in a threaded environment" 4 .IX Item "sigprocmask must work in a threaded environment" Libev uses \f(CW\*(C`sigprocmask\*(C'\fR to temporarily block signals. This is not allowed in a threaded program (\f(CW\*(C`pthread_sigmask\*(C'\fR has to be used). Typical pthread implementations will either allow \f(CW\*(C`sigprocmask\*(C'\fR in the \*(L"main thread\*(R" or will block signals process-wide, both behaviours would be compatible with libev. Interaction between \f(CW\*(C`sigprocmask\*(C'\fR and \&\f(CW\*(C`pthread_sigmask\*(C'\fR could complicate things, however. .Sp The most portable way to handle signals is to block signals in all threads except the initial one, and run the signal handling loop in the initial thread as well. .ie n .IP """long"" must be large enough for common memory allocation sizes" 4 .el .IP "\f(CWlong\fR must be large enough for common memory allocation sizes" 4 .IX Item "long must be large enough for common memory allocation sizes" To improve portability and simplify its \s-1API,\s0 libev uses \f(CW\*(C`long\*(C'\fR internally instead of \f(CW\*(C`size_t\*(C'\fR when allocating its data structures. On non-POSIX systems (Microsoft...) this might be unexpectedly low, but is still at least 31 bits everywhere, which is enough for hundreds of millions of watchers. .ie n .IP """double"" must hold a time value in seconds with enough accuracy" 4 .el .IP "\f(CWdouble\fR must hold a time value in seconds with enough accuracy" 4 .IX Item "double must hold a time value in seconds with enough accuracy" The type \f(CW\*(C`double\*(C'\fR is used to represent timestamps. It is required to have at least 51 bits of mantissa (and 9 bits of exponent), which is good enough for at least into the year 4000 with millisecond accuracy (the design goal for libev). This requirement is overfulfilled by implementations using \s-1IEEE 754,\s0 which is basically all existing ones. .Sp With \s-1IEEE 754\s0 doubles, you get microsecond accuracy until at least the year 2255 (and millisecond accuracy till the year 287396 \- by then, libev is either obsolete or somebody patched it to use \f(CW\*(C`long double\*(C'\fR or something like that, just kidding). .PP If you know of other additional requirements drop me a note. .SH "ALGORITHMIC COMPLEXITIES" .IX Header "ALGORITHMIC COMPLEXITIES" In this section the complexities of (many of) the algorithms used inside libev will be documented. For complexity discussions about backends see the documentation for \f(CW\*(C`ev_default_init\*(C'\fR. .PP All of the following are about amortised time: If an array needs to be extended, libev needs to realloc and move the whole array, but this happens asymptotically rarer with higher number of elements, so O(1) might mean that libev does a lengthy realloc operation in rare cases, but on average it is much faster and asymptotically approaches constant time. .IP "Starting and stopping timer/periodic watchers: O(log skipped_other_timers)" 4 .IX Item "Starting and stopping timer/periodic watchers: O(log skipped_other_timers)" This means that, when you have a watcher that triggers in one hour and there are 100 watchers that would trigger before that, then inserting will have to skip roughly seven (\f(CW\*(C`ld 100\*(C'\fR) of these watchers. .IP "Changing timer/periodic watchers (by autorepeat or calling again): O(log skipped_other_timers)" 4 .IX Item "Changing timer/periodic watchers (by autorepeat or calling again): O(log skipped_other_timers)" That means that changing a timer costs less than removing/adding them, as only the relative motion in the event queue has to be paid for. .IP "Starting io/check/prepare/idle/signal/child/fork/async watchers: O(1)" 4 .IX Item "Starting io/check/prepare/idle/signal/child/fork/async watchers: O(1)" These just add the watcher into an array or at the head of a list. .IP "Stopping check/prepare/idle/fork/async watchers: O(1)" 4 .IX Item "Stopping check/prepare/idle/fork/async watchers: O(1)" .PD 0 .IP "Stopping an io/signal/child watcher: O(number_of_watchers_for_this_(fd/signal/pid % \s-1EV_PID_HASHSIZE\s0))" 4 .IX Item "Stopping an io/signal/child watcher: O(number_of_watchers_for_this_(fd/signal/pid % EV_PID_HASHSIZE))" .PD These watchers are stored in lists, so they need to be walked to find the correct watcher to remove. The lists are usually short (you don't usually have many watchers waiting for the same fd or signal: one is typical, two is rare). .IP "Finding the next timer in each loop iteration: O(1)" 4 .IX Item "Finding the next timer in each loop iteration: O(1)" By virtue of using a binary or 4\-heap, the next timer is always found at a fixed position in the storage array. .IP "Each change on a file descriptor per loop iteration: O(number_of_watchers_for_this_fd)" 4 .IX Item "Each change on a file descriptor per loop iteration: O(number_of_watchers_for_this_fd)" A change means an I/O watcher gets started or stopped, which requires libev to recalculate its status (and possibly tell the kernel, depending on backend and whether \f(CW\*(C`ev_io_set\*(C'\fR was used). .IP "Activating one watcher (putting it into the pending state): O(1)" 4 .IX Item "Activating one watcher (putting it into the pending state): O(1)" .PD 0 .IP "Priority handling: O(number_of_priorities)" 4 .IX Item "Priority handling: O(number_of_priorities)" .PD Priorities are implemented by allocating some space for each priority. When doing priority-based operations, libev usually has to linearly search all the priorities, but starting/stopping and activating watchers becomes O(1) with respect to priority handling. .IP "Sending an ev_async: O(1)" 4 .IX Item "Sending an ev_async: O(1)" .PD 0 .IP "Processing ev_async_send: O(number_of_async_watchers)" 4 .IX Item "Processing ev_async_send: O(number_of_async_watchers)" .IP "Processing signals: O(max_signal_number)" 4 .IX Item "Processing signals: O(max_signal_number)" .PD Sending involves a system call \fIiff\fR there were no other \f(CW\*(C`ev_async_send\*(C'\fR calls in the current loop iteration and the loop is currently blocked. Checking for async and signal events involves iterating over all running async watchers or all signal numbers. .SH "PORTING FROM LIBEV 3.X TO 4.X" .IX Header "PORTING FROM LIBEV 3.X TO 4.X" The major version 4 introduced some incompatible changes to the \s-1API.\s0 .PP At the moment, the \f(CW\*(C`ev.h\*(C'\fR header file provides compatibility definitions for all changes, so most programs should still compile. The compatibility layer might be removed in later versions of libev, so better update to the new \s-1API\s0 early than late. .ie n .IP """EV_COMPAT3"" backwards compatibility mechanism" 4 .el .IP "\f(CWEV_COMPAT3\fR backwards compatibility mechanism" 4 .IX Item "EV_COMPAT3 backwards compatibility mechanism" The backward compatibility mechanism can be controlled by \&\f(CW\*(C`EV_COMPAT3\*(C'\fR. See \*(L"\s-1PREPROCESSOR SYMBOLS/MACROS\*(R"\s0 in the \*(L"\s-1EMBEDDING\*(R"\s0 section. .ie n .IP """ev_default_destroy"" and ""ev_default_fork"" have been removed" 4 .el .IP "\f(CWev_default_destroy\fR and \f(CWev_default_fork\fR have been removed" 4 .IX Item "ev_default_destroy and ev_default_fork have been removed" These calls can be replaced easily by their \f(CW\*(C`ev_loop_xxx\*(C'\fR counterparts: .Sp .Vb 2 \& ev_loop_destroy (EV_DEFAULT_UC); \& ev_loop_fork (EV_DEFAULT); .Ve .IP "function/symbol renames" 4 .IX Item "function/symbol renames" A number of functions and symbols have been renamed: .Sp .Vb 3 \& ev_loop => ev_run \& EVLOOP_NONBLOCK => EVRUN_NOWAIT \& EVLOOP_ONESHOT => EVRUN_ONCE \& \& ev_unloop => ev_break \& EVUNLOOP_CANCEL => EVBREAK_CANCEL \& EVUNLOOP_ONE => EVBREAK_ONE \& EVUNLOOP_ALL => EVBREAK_ALL \& \& EV_TIMEOUT => EV_TIMER \& \& ev_loop_count => ev_iteration \& ev_loop_depth => ev_depth \& ev_loop_verify => ev_verify .Ve .Sp Most functions working on \f(CW\*(C`struct ev_loop\*(C'\fR objects don't have an \&\f(CW\*(C`ev_loop_\*(C'\fR prefix, so it was removed; \f(CW\*(C`ev_loop\*(C'\fR, \f(CW\*(C`ev_unloop\*(C'\fR and associated constants have been renamed to not collide with the \f(CW\*(C`struct ev_loop\*(C'\fR anymore and \f(CW\*(C`EV_TIMER\*(C'\fR now follows the same naming scheme as all other watcher types. Note that \f(CW\*(C`ev_loop_fork\*(C'\fR is still called \&\f(CW\*(C`ev_loop_fork\*(C'\fR because it would otherwise clash with the \f(CW\*(C`ev_fork\*(C'\fR typedef. .ie n .IP """EV_MINIMAL"" mechanism replaced by ""EV_FEATURES""" 4 .el .IP "\f(CWEV_MINIMAL\fR mechanism replaced by \f(CWEV_FEATURES\fR" 4 .IX Item "EV_MINIMAL mechanism replaced by EV_FEATURES" The preprocessor symbol \f(CW\*(C`EV_MINIMAL\*(C'\fR has been replaced by a different mechanism, \f(CW\*(C`EV_FEATURES\*(C'\fR. Programs using \f(CW\*(C`EV_MINIMAL\*(C'\fR usually compile and work, but the library code will of course be larger. .SH "GLOSSARY" .IX Header "GLOSSARY" .IP "active" 4 .IX Item "active" A watcher is active as long as it has been started and not yet stopped. See \*(L"\s-1WATCHER STATES\*(R"\s0 for details. .IP "application" 4 .IX Item "application" In this document, an application is whatever is using libev. .IP "backend" 4 .IX Item "backend" The part of the code dealing with the operating system interfaces. .IP "callback" 4 .IX Item "callback" The address of a function that is called when some event has been detected. Callbacks are being passed the event loop, the watcher that received the event, and the actual event bitset. .IP "callback/watcher invocation" 4 .IX Item "callback/watcher invocation" The act of calling the callback associated with a watcher. .IP "event" 4 .IX Item "event" A change of state of some external event, such as data now being available for reading on a file descriptor, time having passed or simply not having any other events happening anymore. .Sp In libev, events are represented as single bits (such as \f(CW\*(C`EV_READ\*(C'\fR or \&\f(CW\*(C`EV_TIMER\*(C'\fR). .IP "event library" 4 .IX Item "event library" A software package implementing an event model and loop. .IP "event loop" 4 .IX Item "event loop" An entity that handles and processes external events and converts them into callback invocations. .IP "event model" 4 .IX Item "event model" The model used to describe how an event loop handles and processes watchers and events. .IP "pending" 4 .IX Item "pending" A watcher is pending as soon as the corresponding event has been detected. See \*(L"\s-1WATCHER STATES\*(R"\s0 for details. .IP "real time" 4 .IX Item "real time" The physical time that is observed. It is apparently strictly monotonic :) .IP "wall-clock time" 4 .IX Item "wall-clock time" The time and date as shown on clocks. Unlike real time, it can actually be wrong and jump forwards and backwards, e.g. when you adjust your clock. .IP "watcher" 4 .IX Item "watcher" A data structure that describes interest in certain events. Watchers need to be started (attached to an event loop) before they can receive events. .SH "AUTHOR" .IX Header "AUTHOR" Marc Lehmann , with repeated corrections by Mikael Magnusson and Emanuele Giaquinta, and minor corrections by many others. libev-4.33/ev.pod0000644000000000000000000066760313631212545010575 00000000000000=encoding utf-8 =head1 NAME libev - a high performance full-featured event loop written in C =head1 SYNOPSIS #include =head2 EXAMPLE PROGRAM // a single header file is required #include #include // for puts // every watcher type has its own typedef'd struct // with the name ev_TYPE ev_io stdin_watcher; ev_timer timeout_watcher; // all watcher callbacks have a similar signature // this callback is called when data is readable on stdin static void stdin_cb (EV_P_ ev_io *w, int revents) { puts ("stdin ready"); // for one-shot events, one must manually stop the watcher // with its corresponding stop function. ev_io_stop (EV_A_ w); // this causes all nested ev_run's to stop iterating ev_break (EV_A_ EVBREAK_ALL); } // another callback, this time for a time-out static void timeout_cb (EV_P_ ev_timer *w, int revents) { puts ("timeout"); // this causes the innermost ev_run to stop iterating ev_break (EV_A_ EVBREAK_ONE); } int main (void) { // use the default event loop unless you have special needs struct ev_loop *loop = EV_DEFAULT; // initialise an io watcher, then start it // this one will watch for stdin to become readable ev_io_init (&stdin_watcher, stdin_cb, /*STDIN_FILENO*/ 0, EV_READ); ev_io_start (loop, &stdin_watcher); // initialise a timer watcher, then start it // simple non-repeating 5.5 second timeout ev_timer_init (&timeout_watcher, timeout_cb, 5.5, 0.); ev_timer_start (loop, &timeout_watcher); // now wait for events to arrive ev_run (loop, 0); // break was called, so exit return 0; } =head1 ABOUT THIS DOCUMENT This document documents the libev software package. The newest version of this document is also available as an html-formatted web page you might find easier to navigate when reading it for the first time: L. While this document tries to be as complete as possible in documenting libev, its usage and the rationale behind its design, it is not a tutorial on event-based programming, nor will it introduce event-based programming with libev. Familiarity with event based programming techniques in general is assumed throughout this document. =head1 WHAT TO READ WHEN IN A HURRY This manual tries to be very detailed, but unfortunately, this also makes it very long. If you just want to know the basics of libev, I suggest reading L, then the L above and look up the missing functions in L and the C and C sections in L. =head1 ABOUT LIBEV Libev is an event loop: you register interest in certain events (such as a file descriptor being readable or a timeout occurring), and it will manage these event sources and provide your program with events. To do this, it must take more or less complete control over your process (or thread) by executing the I handler, and will then communicate events via a callback mechanism. You register interest in certain events by registering so-called I, which are relatively small C structures you initialise with the details of the event, and then hand it over to libev by I the watcher. =head2 FEATURES Libev supports C (files, many character devices...). Epoll is truly the train wreck among event poll mechanisms, a frankenpoll, cobbled together in a hurry, no thought to design or interaction with others. Oh, the pain, will it ever stop... While stopping, setting and starting an I/O watcher in the same iteration will result in some caching, there is still a system call per such incident (because the same I could point to a different I now), so its best to avoid that. Also, C'ed file descriptors might not work very well if you register events for both file descriptors. Best performance from this backend is achieved by not unregistering all watchers for a file descriptor until it has been closed, if possible, i.e. keep at least one watcher active per fd at all times. Stopping and starting a watcher (without re-setting it) also usually doesn't cause extra overhead. A fork can both result in spurious notifications as well as in libev having to destroy and recreate the epoll object, which can take considerable time and thus should be avoided. All this means that, in practice, C can be as fast or faster than epoll for maybe up to a hundred file descriptors, depending on the usage. So sad. While nominally embeddable in other event loops, this feature is broken in a lot of kernel revisions, but probably(!) works in current versions. This backend maps C and C in the same way as C. =item C (value 64, Linux) Use the Linux-specific Linux AIO (I C<< aio(7) >> but C<< io_submit(2) >>) event interface available in post-4.18 kernels (but libev only tries to use it in 4.19+). This is another Linux train wreck of an event interface. If this backend works for you (as of this writing, it was very experimental), it is the best event interface available on Linux and might be well worth enabling it - if it isn't available in your kernel this will be detected and this backend will be skipped. This backend can batch oneshot requests and supports a user-space ring buffer to receive events. It also doesn't suffer from most of the design problems of epoll (such as not being able to remove event sources from the epoll set), and generally sounds too good to be true. Because, this being the Linux kernel, of course it suffers from a whole new set of limitations, forcing you to fall back to epoll, inheriting all its design issues. For one, it is not easily embeddable (but probably could be done using an event fd at some extra overhead). It also is subject to a system wide limit that can be configured in F. If no AIO requests are left, this backend will be skipped during initialisation, and will switch to epoll when the loop is active. Most problematic in practice, however, is that not all file descriptors work with it. For example, in Linux 5.1, TCP sockets, pipes, event fds, files, F and many others are supported, but ttys do not work properly (a known bug that the kernel developers don't care about, see L), so this is not (yet?) a generic event polling interface. Overall, it seems the Linux developers just don't want it to have a generic event handling mechanism other than C which have a high overhead for the actual polling but can deliver many events at once. By setting a higher I you allow libev to spend more time collecting I/O events, so you can handle more events per iteration, at the cost of increasing latency. Timeouts (both C and C) will not be affected. Setting this to a non-null value will introduce an additional C call into most loop iterations. The sleep time ensures that libev will not poll for I/O events more often then once per this interval, on average (as long as the host time resolution is good enough). Likewise, by setting a higher I you allow libev to spend more time collecting timeouts, at the expense of increased latency/jitter/inexactness (the watcher callback will be called later). C watchers will not be affected. Setting this to a non-null value will not introduce any overhead in libev. Many (busy) programs can usually benefit by setting the I/O collect interval to a value near C<0.1> or so, which is often enough for interactive servers (of course not for games), likewise for timeouts. It usually doesn't make much sense to set it to a lower value than C<0.01>, as this approaches the timing granularity of most systems. Note that if you do transactions with the outside world and you can't increase the parallelity, then this setting will limit your transaction rate (if you need to poll once per transaction and the I/O collect interval is 0.01, then you can't do more than 100 transactions per second). Setting the I can improve the opportunity for saving power, as the program will "bundle" timer callback invocations that are "near" in time together, by delaying some, thus reducing the number of times the process sleeps and wakes up again. Another useful technique to reduce iterations/wake-ups is to use C watchers and make sure they fire on, say, one-second boundaries only. Example: we only need 0.1s timeout granularity, and we wish not to poll more often than 100 times per second: ev_set_timeout_collect_interval (EV_DEFAULT_UC_ 0.1); ev_set_io_collect_interval (EV_DEFAULT_UC_ 0.01); =item ev_invoke_pending (loop) This call will simply invoke all pending watchers while resetting their pending state. Normally, C does this automatically when required, but when overriding the invoke callback this call comes handy. This function can be invoked from a watcher - this can be useful for example when you want to do some lengthy calculation and want to pass further event handling to another thread (you still have to make sure only one thread executes within C or C of course). =item int ev_pending_count (loop) Returns the number of pending watchers - zero indicates that no watchers are pending. =item ev_set_invoke_pending_cb (loop, void (*invoke_pending_cb)(EV_P)) This overrides the invoke pending functionality of the loop: Instead of invoking all pending watchers when there are any, C will call this callback instead. This is useful, for example, when you want to invoke the actual watchers inside another context (another thread etc.). If you want to reset the callback, use C as new callback. =item ev_set_loop_release_cb (loop, void (*release)(EV_P) throw (), void (*acquire)(EV_P) throw ()) Sometimes you want to share the same loop between multiple threads. This can be done relatively simply by putting mutex_lock/unlock calls around each call to a libev function. However, C can run an indefinite time, so it is not feasible to wait for it to return. One way around this is to wake up the event loop via C and C, another way is to set these I and I callbacks on the loop. When set, then C will be called just before the thread is suspended waiting for new events, and C is called just afterwards. Ideally, C will just call your mutex_unlock function, and C will just call the mutex_lock function again. While event loop modifications are allowed between invocations of C and C (that's their only purpose after all), no modifications done will affect the event loop, i.e. adding watchers will have no effect on the set of file descriptors being watched, or the time waited. Use an C watcher to wake up C when you want it to take note of any changes you made. In theory, threads executing C will be async-cancel safe between invocations of C and C. See also the locking example in the C section later in this document. =item ev_set_userdata (loop, void *data) =item void *ev_userdata (loop) Set and retrieve a single C associated with a loop. When C has never been called, then C returns C<0>. These two functions can be used to associate arbitrary data with a loop, and are intended solely for the C, C and C callbacks described above, but of course can be (ab-)used for any other purpose as well. =item ev_verify (loop) This function only does something when C support has been compiled in, which is the default for non-minimal builds. It tries to go through all internal structures and checks them for validity. If anything is found to be inconsistent, it will print an error message to standard error and call C. This can be used to catch bugs inside libev itself: under normal circumstances, this function will never abort as of course libev keeps its data structures consistent. =back =head1 ANATOMY OF A WATCHER In the following description, uppercase C in names stands for the watcher type, e.g. C can mean C for timer watchers and C for I/O watchers. A watcher is an opaque structure that you allocate and register to record your interest in some event. To make a concrete example, imagine you want to wait for STDIN to become readable, you would create an C watcher for that: static void my_cb (struct ev_loop *loop, ev_io *w, int revents) { ev_io_stop (w); ev_break (loop, EVBREAK_ALL); } struct ev_loop *loop = ev_default_loop (0); ev_io stdin_watcher; ev_init (&stdin_watcher, my_cb); ev_io_set (&stdin_watcher, STDIN_FILENO, EV_READ); ev_io_start (loop, &stdin_watcher); ev_run (loop, 0); As you can see, you are responsible for allocating the memory for your watcher structures (and it is I a bad idea to do this on the stack). Each watcher has an associated watcher structure (called C or simply C, as typedefs are provided for all watcher structs). Each watcher structure must be initialised by a call to C, which expects a callback to be provided. This callback is invoked each time the event occurs (or, in the case of I/O watchers, each time the event loop detects that the file descriptor given is readable and/or writable). Each watcher type further has its own C<< ev_TYPE_set (watcher *, ...) >> macro to configure it, with arguments specific to the watcher type. There is also a macro to combine initialisation and setting in one call: C<< ev_TYPE_init (watcher *, callback, ...) >>. To make the watcher actually watch out for events, you have to start it with a watcher-specific start function (C<< ev_TYPE_start (loop, watcher *) >>), and you can stop watching for events at any time by calling the corresponding stop function (C<< ev_TYPE_stop (loop, watcher *) >>. As long as your watcher is active (has been started but not stopped) you must not touch the values stored in it except when explicitly documented otherwise. Most specifically you must never reinitialise it or call its C macro. Each and every callback receives the event loop pointer as first, the registered watcher structure as second, and a bitset of received events as third argument. The received events usually include a single bit per event type received (you can receive multiple events at the same time). The possible bit masks are: =over 4 =item C =item C The file descriptor in the C watcher has become readable and/or writable. =item C The C watcher has timed out. =item C The C watcher has timed out. =item C The signal specified in the C watcher has been received by a thread. =item C The pid specified in the C watcher has received a status change. =item C The path specified in the C watcher changed its attributes somehow. =item C The C watcher has determined that you have nothing better to do. =item C =item C All C watchers are invoked just I C starts to gather new events, and all C watchers are queued (not invoked) just after C has gathered them, but before it queues any callbacks for any received events. That means C watchers are the last watchers invoked before the event loop sleeps or polls for new events, and C watchers will be invoked before any other watchers of the same or lower priority within an event loop iteration. Callbacks of both watcher types can start and stop as many watchers as they want, and all of them will be taken into account (for example, a C watcher might start an idle watcher to keep C from blocking). =item C The embedded event loop specified in the C watcher needs attention. =item C The event loop has been resumed in the child process after fork (see C). =item C The event loop is about to be destroyed (see C). =item C The given async watcher has been asynchronously notified (see C). =item C Not ever sent (or otherwise used) by libev itself, but can be freely used by libev users to signal watchers (e.g. via C). =item C An unspecified error has occurred, the watcher has been stopped. This might happen because the watcher could not be properly started because libev ran out of memory, a file descriptor was found to be closed or any other problem. Libev considers these application bugs. You best act on it by reporting the problem and somehow coping with the watcher being stopped. Note that well-written programs should not receive an error ever, so when your watcher receives it, this usually indicates a bug in your program. Libev will usually signal a few "dummy" events together with an error, for example it might indicate that a fd is readable or writable, and if your callbacks is well-written it can just attempt the operation and cope with the error from read() or write(). This will not work in multi-threaded programs, though, as the fd could already be closed and reused for another thing, so beware. =back =head2 GENERIC WATCHER FUNCTIONS =over 4 =item C (ev_TYPE *watcher, callback) This macro initialises the generic portion of a watcher. The contents of the watcher object can be arbitrary (so C will do). Only the generic parts of the watcher are initialised, you I to call the type-specific C macro afterwards to initialise the type-specific parts. For each type there is also a C macro which rolls both calls into one. You can reinitialise a watcher at any time as long as it has been stopped (or never started) and there are no pending events outstanding. The callback is always of type C. Example: Initialise an C watcher in two steps. ev_io w; ev_init (&w, my_cb); ev_io_set (&w, STDIN_FILENO, EV_READ); =item C (ev_TYPE *watcher, [args]) This macro initialises the type-specific parts of a watcher. You need to call C at least once before you call this macro, but you can call C any number of times. You must not, however, call this macro on a watcher that is active (it can be pending, however, which is a difference to the C macro). Although some watcher types do not have type-specific arguments (e.g. C) you still need to call its C macro. See C, above, for an example. =item C (ev_TYPE *watcher, callback, [args]) This convenience macro rolls both C and C macro calls into a single call. This is the most convenient method to initialise a watcher. The same limitations apply, of course. Example: Initialise and set an C watcher in one step. ev_io_init (&w, my_cb, STDIN_FILENO, EV_READ); =item C (loop, ev_TYPE *watcher) Starts (activates) the given watcher. Only active watchers will receive events. If the watcher is already active nothing will happen. Example: Start the C watcher that is being abused as example in this whole section. ev_io_start (EV_DEFAULT_UC, &w); =item C (loop, ev_TYPE *watcher) Stops the given watcher if active, and clears the pending status (whether the watcher was active or not). It is possible that stopped watchers are pending - for example, non-repeating timers are being stopped when they become pending - but calling C ensures that the watcher is neither active nor pending. If you want to free or reuse the memory used by the watcher it is therefore a good idea to always call its C function. =item bool ev_is_active (ev_TYPE *watcher) Returns a true value iff the watcher is active (i.e. it has been started and not yet been stopped). As long as a watcher is active you must not modify it. =item bool ev_is_pending (ev_TYPE *watcher) Returns a true value iff the watcher is pending, (i.e. it has outstanding events but its callback has not yet been invoked). As long as a watcher is pending (but not active) you must not call an init function on it (but C is safe), you must not change its priority, and you must make sure the watcher is available to libev (e.g. you cannot C it). =item callback ev_cb (ev_TYPE *watcher) Returns the callback currently set on the watcher. =item ev_set_cb (ev_TYPE *watcher, callback) Change the callback. You can change the callback at virtually any time (modulo threads). =item ev_set_priority (ev_TYPE *watcher, int priority) =item int ev_priority (ev_TYPE *watcher) Set and query the priority of the watcher. The priority is a small integer between C (default: C<2>) and C (default: C<-2>). Pending watchers with higher priority will be invoked before watchers with lower priority, but priority will not keep watchers from being executed (except for C watchers). If you need to suppress invocation when higher priority events are pending you need to look at C watchers, which provide this functionality. You I change the priority of a watcher as long as it is active or pending. Setting a priority outside the range of C to C is fine, as long as you do not mind that the priority value you query might or might not have been clamped to the valid range. The default priority used by watchers when no priority has been set is always C<0>, which is supposed to not be too high and not be too low :). See L, below, for a more thorough treatment of priorities. =item ev_invoke (loop, ev_TYPE *watcher, int revents) Invoke the C with the given C and C. Neither C nor C need to be valid as long as the watcher callback can deal with that fact, as both are simply passed through to the callback. =item int ev_clear_pending (loop, ev_TYPE *watcher) If the watcher is pending, this function clears its pending status and returns its C bitset (as if its callback was invoked). If the watcher isn't pending it does nothing and returns C<0>. Sometimes it can be useful to "poll" a watcher instead of waiting for its callback to be invoked, which can be accomplished with this function. =item ev_feed_event (loop, ev_TYPE *watcher, int revents) Feeds the given event set into the event loop, as if the specified event had happened for the specified watcher (which must be a pointer to an initialised but not necessarily started event watcher). Obviously you must not free the watcher as long as it has pending events. Stopping the watcher, letting libev invoke it, or calling C will clear the pending event, even if the watcher was not started in the first place. See also C and C for related functions that do not need a watcher. =back See also the L and L idioms. =head2 WATCHER STATES There are various watcher states mentioned throughout this manual - active, pending and so on. In this section these states and the rules to transition between them will be described in more detail - and while these rules might look complicated, they usually do "the right thing". =over 4 =item initialised Before a watcher can be registered with the event loop it has to be initialised. This can be done with a call to C, or calls to C followed by the watcher-specific C function. In this state it is simply some block of memory that is suitable for use in an event loop. It can be moved around, freed, reused etc. at will - as long as you either keep the memory contents intact, or call C again. =item started/running/active Once a watcher has been started with a call to C it becomes property of the event loop, and is actively waiting for events. While in this state it cannot be accessed (except in a few documented ways), moved, freed or anything else - the only legal thing is to keep a pointer to it, and call libev functions on it that are documented to work on active watchers. =item pending If a watcher is active and libev determines that an event it is interested in has occurred (such as a timer expiring), it will become pending. It will stay in this pending state until either it is stopped or its callback is about to be invoked, so it is not normally pending inside the watcher callback. The watcher might or might not be active while it is pending (for example, an expired non-repeating timer can be pending but no longer active). If it is stopped, it can be freely accessed (e.g. by calling C), but it is still property of the event loop at this time, so cannot be moved, freed or reused. And if it is active the rules described in the previous item still apply. It is also possible to feed an event on a watcher that is not active (e.g. via C), in which case it becomes pending without being active. =item stopped A watcher can be stopped implicitly by libev (in which case it might still be pending), or explicitly by calling its C function. The latter will clear any pending state the watcher might be in, regardless of whether it was active or not, so stopping a watcher explicitly before freeing it is often a good idea. While stopped (and not pending) the watcher is essentially in the initialised state, that is, it can be reused, moved, modified in any way you wish (but when you trash the memory block, you need to C it again). =back =head2 WATCHER PRIORITY MODELS Many event loops support I, which are usually small integers that influence the ordering of event callback invocation between watchers in some way, all else being equal. In libev, watcher priorities can be set using C. See its description for the more technical details such as the actual priority range. There are two common ways how these these priorities are being interpreted by event loops: In the more common lock-out model, higher priorities "lock out" invocation of lower priority watchers, which means as long as higher priority watchers receive events, lower priority watchers are not being invoked. The less common only-for-ordering model uses priorities solely to order callback invocation within a single event loop iteration: Higher priority watchers are invoked before lower priority ones, but they all get invoked before polling for new events. Libev uses the second (only-for-ordering) model for all its watchers except for idle watchers (which use the lock-out model). The rationale behind this is that implementing the lock-out model for watchers is not well supported by most kernel interfaces, and most event libraries will just poll for the same events again and again as long as their callbacks have not been executed, which is very inefficient in the common case of one high-priority watcher locking out a mass of lower priority ones. Static (ordering) priorities are most useful when you have two or more watchers handling the same resource: a typical usage example is having an C watcher to receive data, and an associated C to handle timeouts. Under load, data might be received while the program handles other jobs, but since timers normally get invoked first, the timeout handler will be executed before checking for data. In that case, giving the timer a lower priority than the I/O watcher ensures that I/O will be handled first even under adverse conditions (which is usually, but not always, what you want). Since idle watchers use the "lock-out" model, meaning that idle watchers will only be executed when no same or higher priority watchers have received events, they can be used to implement the "lock-out" model when required. For example, to emulate how many other event libraries handle priorities, you can associate an C watcher to each such watcher, and in the normal watcher callback, you just start the idle watcher. The real processing is done in the idle watcher callback. This causes libev to continuously poll and process kernel event data for the watcher, but when the lock-out case is known to be rare (which in turn is rare :), this is workable. Usually, however, the lock-out model implemented that way will perform miserably under the type of load it was designed to handle. In that case, it might be preferable to stop the real watcher before starting the idle watcher, so the kernel will not have to process the event in case the actual processing will be delayed for considerable time. Here is an example of an I/O watcher that should run at a strictly lower priority than the default, and which should only process data when no other events are pending: ev_idle idle; // actual processing watcher ev_io io; // actual event watcher static void io_cb (EV_P_ ev_io *w, int revents) { // stop the I/O watcher, we received the event, but // are not yet ready to handle it. ev_io_stop (EV_A_ w); // start the idle watcher to handle the actual event. // it will not be executed as long as other watchers // with the default priority are receiving events. ev_idle_start (EV_A_ &idle); } static void idle_cb (EV_P_ ev_idle *w, int revents) { // actual processing read (STDIN_FILENO, ...); // have to start the I/O watcher again, as // we have handled the event ev_io_start (EV_P_ &io); } // initialisation ev_idle_init (&idle, idle_cb); ev_io_init (&io, io_cb, STDIN_FILENO, EV_READ); ev_io_start (EV_DEFAULT_ &io); In the "real" world, it might also be beneficial to start a timer, so that low-priority connections can not be locked out forever under load. This enables your program to keep a lower latency for important connections during short periods of high load, while not completely locking out less important ones. =head1 WATCHER TYPES This section describes each watcher in detail, but will not repeat information given in the last section. Any initialisation/set macros, functions and members specific to the watcher type are explained. Most members are additionally marked with either I<[read-only]>, meaning that, while the watcher is active, you can look at the member and expect some sensible content, but you must not modify it (you can modify it while the watcher is stopped to your hearts content), or I<[read-write]>, which means you can expect it to have some sensible content while the watcher is active, but you can also modify it (within the same thread as the event loop, i.e. without creating data races). Modifying it may not do something sensible or take immediate effect (or do anything at all), but libev will not crash or malfunction in any way. In any case, the documentation for each member will explain what the effects are, and if there are any additional access restrictions. =head2 C - is this file descriptor readable or writable? I/O watchers check whether a file descriptor is readable or writable in each iteration of the event loop, or, more precisely, when reading would not block the process and writing would at least be able to write some data. This behaviour is called level-triggering because you keep receiving events as long as the condition persists. Remember you can stop the watcher if you don't want to act on the event and neither want to receive future events. In general you can register as many read and/or write event watchers per fd as you want (as long as you don't confuse yourself). Setting all file descriptors to non-blocking mode is also usually a good idea (but not required if you know what you are doing). Another thing you have to watch out for is that it is quite easy to receive "spurious" readiness notifications, that is, your callback might be called with C but a subsequent C(2) will actually block because there is no data. It is very easy to get into this situation even with a relatively standard program structure. Thus it is best to always use non-blocking I/O: An extra C(2) returning C is far preferable to a program hanging until some data arrives. If you cannot run the fd in non-blocking mode (for example you should not play around with an Xlib connection), then you have to separately re-test whether a file descriptor is really ready with a known-to-be good interface such as poll (fortunately in the case of Xlib, it already does this on its own, so its quite safe to use). Some people additionally use C and an interval timer, just to be sure you won't block indefinitely. But really, best use non-blocking mode. =head3 The special problem of disappearing file descriptors Some backends (e.g. kqueue, epoll, linuxaio) need to be told about closing a file descriptor (either due to calling C explicitly or any other means, such as C). The reason is that you register interest in some file descriptor, but when it goes away, the operating system will silently drop this interest. If another file descriptor with the same number then is registered with libev, there is no efficient way to see that this is, in fact, a different file descriptor. To avoid having to explicitly tell libev about such cases, libev follows the following policy: Each time C is being called, libev will assume that this is potentially a new file descriptor, otherwise it is assumed that the file descriptor stays the same. That means that you I to call C (or C) when you change the descriptor even if the file descriptor number itself did not change. This is how one would do it normally anyway, the important point is that the libev application should not optimise around libev but should leave optimisations to libev. =head3 The special problem of dup'ed file descriptors Some backends (e.g. epoll), cannot register events for file descriptors, but only events for the underlying file descriptions. That means when you have C'ed file descriptors or weirder constellations, and register events for them, only one file descriptor might actually receive events. There is no workaround possible except not registering events for potentially C'ed file descriptors, or to resort to C or C. =head3 The special problem of files Many people try to use C. =item EV_USE_EVENTFD If defined to be C<1>, then libev will assume that C is available and will probe for kernel support at runtime. This will improve C and C performance and reduce resource consumption. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.7 or newer, otherwise disabled. =item EV_USE_SIGNALFD If defined to be C<1>, then libev will assume that C is available and will probe for kernel support at runtime. This enables the use of EVFLAG_SIGNALFD for faster and simpler signal handling. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.7 or newer, otherwise disabled. =item EV_USE_TIMERFD If defined to be C<1>, then libev will assume that C is available and will probe for kernel support at runtime. This allows libev to detect time jumps accurately. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.8 or newer and define C, otherwise disabled. =item EV_USE_EVENTFD If defined to be C<1>, then libev will assume that C is available and will probe for kernel support at runtime. This will improve C and C performance and reduce resource consumption. If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc 2.7 or newer, otherwise disabled. =item EV_USE_SELECT If undefined or defined to be C<1>, libev will compile in support for the C is buggy All that's left is C actively limits the number of file descriptors you can pass in to 1024 - your program suddenly crashes when you use more. There is an undocumented "workaround" for this - defining C<_DARWIN_UNLIMITED_SELECT>, which libev tries to use, so select I work on OS/X. =head2 SOLARIS PROBLEMS AND WORKAROUNDS =head3 C reentrancy The default compile environment on Solaris is unfortunately so thread-unsafe that you can't even use components/libraries compiled without C<-D_REENTRANT> in a threaded program, which, of course, isn't defined by default. A valid, if stupid, implementation choice. If you want to use libev in threaded environments you have to make sure it's compiled with C<_REENTRANT> defined. =head3 Event port backend The scalable event interface for Solaris is called "event ports". Unfortunately, this mechanism is very buggy in all major releases. If you run into high CPU usage, your program freezes or you get a large number of spurious wakeups, make sure you have all the relevant and latest kernel patches applied. No, I don't know which ones, but there are multiple ones to apply, and afterwards, event ports actually work great. If you can't get it to work, you can try running the program by setting the environment variable C to only allow C and C works fine with large bitsets on AIX, and AIX is dead anyway. =head2 WIN32 PLATFORM LIMITATIONS AND WORKAROUNDS =head3 General issues Win32 doesn't support any of the standards (e.g. POSIX) that libev requires, and its I/O model is fundamentally incompatible with the POSIX model. Libev still offers limited functionality on this platform in the form of the C backend, and only supports socket descriptors. This only applies when using Win32 natively, not when using e.g. cygwin. Actually, it only applies to the microsofts own compilers, as every compiler comes with a slightly differently broken/incompatible environment. Lifting these limitations would basically require the full re-implementation of the I/O system. If you are into this kind of thing, then note that glib does exactly that for you in a very portable way (note also that glib is the slowest event library known to man). There is no supported compilation method available on windows except embedding it into other applications. Sensible signal handling is officially unsupported by Microsoft - libev tries its best, but under most conditions, signals will simply not work. Not a libev limitation but worth mentioning: windows apparently doesn't accept large writes: instead of resulting in a partial write, windows will either accept everything or return C if the buffer is too large, so make sure you only write small amounts into your sockets (less than a megabyte seems safe, but this apparently depends on the amount of memory available). Due to the many, low, and arbitrary limits on the win32 platform and the abysmal performance of winsockets, using a large number of sockets is not recommended (and not reasonable). If your program needs to use more than a hundred or so sockets, then likely it needs to use a totally different implementation for windows, as libev offers the POSIX readiness notification model, which cannot be implemented efficiently on windows (due to Microsoft monopoly games). A typical way to use libev under windows is to embed it (see the embedding section for details) and use the following F header file instead of F: #define EV_STANDALONE /* keeps ev from requiring config.h */ #define EV_SELECT_IS_WINSOCKET 1 /* configure libev for windows select */ #include "ev.h" And compile the following F file into your project (make sure you do I compile the F or any other embedded source files!): #include "evwrap.h" #include "ev.c" =head3 The winsocket C function doesn't follow POSIX in that it requires socket I and not socket I (it is also extremely buggy). This makes select very inefficient, and also requires a mapping from file descriptors to socket handles (the Microsoft C runtime provides the function C<_open_osfhandle> for this). See the discussion of the C, C and C preprocessor symbols for more info. The configuration for a "naked" win32 using the Microsoft runtime libraries and raw winsocket select is: #define EV_USE_SELECT 1 #define EV_SELECT_IS_WINSOCKET 1 /* forces EV_SELECT_USE_FD_SET, too */ Note that winsockets handling of fd sets is O(n), so you can easily get a complexity in the O(n²) range when using win32. =head3 Limited number of file descriptors Windows has numerous arbitrary (and low) limits on things. Early versions of winsocket's select only supported waiting for a maximum of C<64> handles (probably owning to the fact that all windows kernels can only wait for C<64> things at the same time internally; Microsoft recommends spawning a chain of threads and wait for 63 handles and the previous thread in each. Sounds great!). Newer versions support more handles, but you need to define C to some high number (e.g. C<2048>) before compiling the winsocket select call (which might be in libev or elsewhere, for example, perl and many other interpreters do their own select emulation on windows). Another limit is the number of file descriptors in the Microsoft runtime libraries, which by default is C<64> (there must be a hidden I<64> fetish or something like this inside Microsoft). You can increase this by calling C<_setmaxstdio>, which can increase this limit to C<2048> (another arbitrary limit), but is broken in many versions of the Microsoft runtime libraries. This might get you to about C<512> or C<2048> sockets (depending on windows version and/or the phase of the moon). To get more, you need to wrap all I/O functions and provide your own fd management, but the cost of calling select (O(n²)) will likely make this unworkable. =head2 PORTABILITY REQUIREMENTS In addition to a working ISO-C implementation and of course the backend-specific APIs, libev relies on a few additional extensions: =over 4 =item C must have compatible calling conventions regardless of C. Libev assumes not only that all watcher pointers have the same internal structure (guaranteed by POSIX but not by ISO C for example), but it also assumes that the same (machine) code can be used to call any watcher callback: The watcher callbacks have different type signatures, but libev calls them using an C internally. =item null pointers and integer zero are represented by 0 bytes Libev uses C to initialise structs and arrays to C<0> bytes, and relies on this setting pointers and integers to null. =item pointer accesses must be thread-atomic Accessing a pointer value must be atomic, it must both be readable and writable in one piece - this is the case on all current architectures. =item C must be thread-atomic as well The type C (or whatever is defined as C) must be atomic with respect to accesses from different threads. This is not part of the specification for C, but is believed to be sufficiently portable. =item C must work in a threaded environment Libev uses C to temporarily block signals. This is not allowed in a threaded program (C has to be used). Typical pthread implementations will either allow C in the "main thread" or will block signals process-wide, both behaviours would be compatible with libev. Interaction between C and C could complicate things, however. The most portable way to handle signals is to block signals in all threads except the initial one, and run the signal handling loop in the initial thread as well. =item C must be large enough for common memory allocation sizes To improve portability and simplify its API, libev uses C internally instead of C when allocating its data structures. On non-POSIX systems (Microsoft...) this might be unexpectedly low, but is still at least 31 bits everywhere, which is enough for hundreds of millions of watchers. =item C must hold a time value in seconds with enough accuracy The type C is used to represent timestamps. It is required to have at least 51 bits of mantissa (and 9 bits of exponent), which is good enough for at least into the year 4000 with millisecond accuracy (the design goal for libev). This requirement is overfulfilled by implementations using IEEE 754, which is basically all existing ones. With IEEE 754 doubles, you get microsecond accuracy until at least the year 2255 (and millisecond accuracy till the year 287396 - by then, libev is either obsolete or somebody patched it to use C or something like that, just kidding). =back If you know of other additional requirements drop me a note. =head1 ALGORITHMIC COMPLEXITIES In this section the complexities of (many of) the algorithms used inside libev will be documented. For complexity discussions about backends see the documentation for C. All of the following are about amortised time: If an array needs to be extended, libev needs to realloc and move the whole array, but this happens asymptotically rarer with higher number of elements, so O(1) might mean that libev does a lengthy realloc operation in rare cases, but on average it is much faster and asymptotically approaches constant time. =over 4 =item Starting and stopping timer/periodic watchers: O(log skipped_other_timers) This means that, when you have a watcher that triggers in one hour and there are 100 watchers that would trigger before that, then inserting will have to skip roughly seven (C) of these watchers. =item Changing timer/periodic watchers (by autorepeat or calling again): O(log skipped_other_timers) That means that changing a timer costs less than removing/adding them, as only the relative motion in the event queue has to be paid for. =item Starting io/check/prepare/idle/signal/child/fork/async watchers: O(1) These just add the watcher into an array or at the head of a list. =item Stopping check/prepare/idle/fork/async watchers: O(1) =item Stopping an io/signal/child watcher: O(number_of_watchers_for_this_(fd/signal/pid % EV_PID_HASHSIZE)) These watchers are stored in lists, so they need to be walked to find the correct watcher to remove. The lists are usually short (you don't usually have many watchers waiting for the same fd or signal: one is typical, two is rare). =item Finding the next timer in each loop iteration: O(1) By virtue of using a binary or 4-heap, the next timer is always found at a fixed position in the storage array. =item Each change on a file descriptor per loop iteration: O(number_of_watchers_for_this_fd) A change means an I/O watcher gets started or stopped, which requires libev to recalculate its status (and possibly tell the kernel, depending on backend and whether C was used). =item Activating one watcher (putting it into the pending state): O(1) =item Priority handling: O(number_of_priorities) Priorities are implemented by allocating some space for each priority. When doing priority-based operations, libev usually has to linearly search all the priorities, but starting/stopping and activating watchers becomes O(1) with respect to priority handling. =item Sending an ev_async: O(1) =item Processing ev_async_send: O(number_of_async_watchers) =item Processing signals: O(max_signal_number) Sending involves a system call I there were no other C calls in the current loop iteration and the loop is currently blocked. Checking for async and signal events involves iterating over all running async watchers or all signal numbers. =back =head1 PORTING FROM LIBEV 3.X TO 4.X The major version 4 introduced some incompatible changes to the API. At the moment, the C header file provides compatibility definitions for all changes, so most programs should still compile. The compatibility layer might be removed in later versions of libev, so better update to the new API early than late. =over 4 =item C backwards compatibility mechanism The backward compatibility mechanism can be controlled by C. See L in the L section. =item C and C have been removed These calls can be replaced easily by their C counterparts: ev_loop_destroy (EV_DEFAULT_UC); ev_loop_fork (EV_DEFAULT); =item function/symbol renames A number of functions and symbols have been renamed: ev_loop => ev_run EVLOOP_NONBLOCK => EVRUN_NOWAIT EVLOOP_ONESHOT => EVRUN_ONCE ev_unloop => ev_break EVUNLOOP_CANCEL => EVBREAK_CANCEL EVUNLOOP_ONE => EVBREAK_ONE EVUNLOOP_ALL => EVBREAK_ALL EV_TIMEOUT => EV_TIMER ev_loop_count => ev_iteration ev_loop_depth => ev_depth ev_loop_verify => ev_verify Most functions working on C objects don't have an C prefix, so it was removed; C, C and associated constants have been renamed to not collide with the C anymore and C now follows the same naming scheme as all other watcher types. Note that C is still called C because it would otherwise clash with the C typedef. =item C mechanism replaced by C The preprocessor symbol C has been replaced by a different mechanism, C. Programs using C usually compile and work, but the library code will of course be larger. =back =head1 GLOSSARY =over 4 =item active A watcher is active as long as it has been started and not yet stopped. See L for details. =item application In this document, an application is whatever is using libev. =item backend The part of the code dealing with the operating system interfaces. =item callback The address of a function that is called when some event has been detected. Callbacks are being passed the event loop, the watcher that received the event, and the actual event bitset. =item callback/watcher invocation The act of calling the callback associated with a watcher. =item event A change of state of some external event, such as data now being available for reading on a file descriptor, time having passed or simply not having any other events happening anymore. In libev, events are represented as single bits (such as C or C). =item event library A software package implementing an event model and loop. =item event loop An entity that handles and processes external events and converts them into callback invocations. =item event model The model used to describe how an event loop handles and processes watchers and events. =item pending A watcher is pending as soon as the corresponding event has been detected. See L for details. =item real time The physical time that is observed. It is apparently strictly monotonic :) =item wall-clock time The time and date as shown on clocks. Unlike real time, it can actually be wrong and jump forwards and backwards, e.g. when you adjust your clock. =item watcher A data structure that describes interest in certain events. Watchers need to be started (attached to an event loop) before they can receive events. =back =head1 AUTHOR Marc Lehmann , with repeated corrections by Mikael Magnusson and Emanuele Giaquinta, and minor corrections by many others. libev-4.33/Symbols.ev0000644000000000000000000000210713634411664011427 00000000000000ev_async_send ev_async_start ev_async_stop ev_backend ev_break ev_check_start ev_check_stop ev_child_start ev_child_stop ev_cleanup_start ev_cleanup_stop ev_clear_pending ev_default_loop ev_default_loop_ptr ev_depth ev_embeddable_backends ev_embed_start ev_embed_stop ev_embed_sweep ev_feed_event ev_feed_fd_event ev_feed_signal ev_feed_signal_event ev_fork_start ev_fork_stop ev_idle_start ev_idle_stop ev_invoke ev_invoke_pending ev_io_start ev_io_stop ev_iteration ev_loop_destroy ev_loop_fork ev_loop_new ev_now ev_now_update ev_once ev_pending_count ev_periodic_again ev_periodic_start ev_periodic_stop ev_prepare_start ev_prepare_stop ev_recommended_backends ev_ref ev_resume ev_run ev_set_allocator ev_set_invoke_pending_cb ev_set_io_collect_interval ev_set_loop_release_cb ev_set_syserr_cb ev_set_timeout_collect_interval ev_set_userdata ev_signal_start ev_signal_stop ev_sleep ev_stat_start ev_stat_stat ev_stat_stop ev_supported_backends ev_suspend ev_time ev_timer_again ev_timer_remaining ev_timer_start ev_timer_stop ev_unref ev_userdata ev_verify ev_version_major ev_version_minor libev-4.33/Symbols.event0000644000000000000000000000057213634411664012142 00000000000000event_active event_add event_base_dispatch event_base_free event_base_get_method event_base_loop event_base_loopexit event_base_new event_base_once event_base_priority_init event_base_set event_del event_dispatch event_get_callback event_get_method event_get_version event_init event_loop event_loopexit event_once event_pending event_priority_init event_priority_set event_set