async-2.0.1.4/0000755000000000000000000000000012041202635011152 5ustar0000000000000000async-2.0.1.4/LICENSE0000644000000000000000000000276212041202635012166 0ustar0000000000000000Copyright (c) 2012, Simon Marlow All rights reserved. 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. * Neither the name of Simon Marlow nor the names of other contributors may be used to endorse or promote products derived from this software without specific prior written permission. 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. async-2.0.1.4/Setup.hs0000644000000000000000000000005612041202635012607 0ustar0000000000000000import Distribution.Simple main = defaultMain async-2.0.1.4/async.cabal0000644000000000000000000000461212041202635013256 0ustar0000000000000000name: async synopsis: Run IO operations asynchronously and wait for their results description: This package provides a higher-level interface over threads, in which an @Async a@ is a concurrent thread that will eventually deliver a value of type @a@. The package provides ways to create @Async@ computations, wait for their results, and cancel them. . Using @Async@ is safer than using threads in two ways: . * When waiting for a thread to return a result, if the thread dies with an exception then the caller must either re-throw the exception ('wait') or handle it ('waitCatch'); the exception cannot be ignored. . * The API makes it possible to build a tree of threads that are automatically killed when their parent dies (see 'withAsync'). . Changes in 2.0.1.4: . * Bump @base@ dependency of test suite . Changes in 2.0.1.3: . * Bump @base@ dependency to allow 4.6 . Changes in 2.0.1.2: . * Bump @stm@ dependency to 2.4 . Changes in 2.0.1.1: . * Safe Haskell support: @Control.Concurrent.Async@ is now @Trustworthy@ . Changes in 2.0.1.0: . * Added a @Functor@ instance for @Async@ . * Added @asyncBound@, @asyncOn@, @asyncWithUnmask@, @asyncOnWithUnmask@, @withAsyncBound@, @withAsyncOn@, @withAsyncWithUnmask@, @withAsyncOnWithUnmask@. . * Added @mapConcurrently@ . * Added @Concurrently@ (with @Applicative@ and @Alternative@ instances) version: 2.0.1.4 license: BSD3 license-file: LICENSE author: Simon Marlow maintainer: Simon Marlow copyright: (c) Simon Marlow 2012 category: Concurrency build-type: Simple cabal-version: >=1.8 homepage: https://github.com/simonmar/async bug-reports: https://github.com/simonmar/async/issues tested-with: GHC==7.0.3, GHC==7.2.2, GHC==7.4.1 extra-source-files: bench/race.hs source-repository head type: git location: https://github.com/simonmar/async.git library exposed-modules: Control.Concurrent.Async build-depends: base >= 4.3 && < 4.7, stm >= 2.2 && < 2.5 test-suite test-async type: exitcode-stdio-1.0 hs-source-dirs: test main-is: test-async.hs build-depends: base >= 4.3 && < 4.7, async, test-framework, test-framework-hunit, HUnit async-2.0.1.4/Control/0000755000000000000000000000000012041202635012572 5ustar0000000000000000async-2.0.1.4/Control/Concurrent/0000755000000000000000000000000012041202635014714 5ustar0000000000000000async-2.0.1.4/Control/Concurrent/Async.hs0000644000000000000000000005010412041202635016325 0ustar0000000000000000{-# LANGUAGE CPP, MagicHash, UnboxedTuples, RankNTypes #-} #if __GLASGOW_HASKELL__ >= 701 {-# LANGUAGE Trustworthy #-} #endif {-# OPTIONS -Wall #-} ----------------------------------------------------------------------------- -- | -- Module : Control.Concurrent.Async -- Copyright : (c) Simon Marlow 2012 -- License : BSD3 (see the file LICENSE) -- -- Maintainer : Simon Marlow -- Stability : provisional -- Portability : non-portable (requires concurrency) -- -- This module provides a set of operations for running IO operations -- asynchronously and waiting for their results. It is a thin layer -- over the basic concurrency operations provided by -- "Control.Concurrent". The main additional functionality it -- provides is the ability to wait for the return value of a thread, -- but the interface also provides some additional safety and -- robustness over using threads and @MVar@ directly. -- -- The basic type is @'Async' a@, which represents an asynchronous -- @IO@ action that will return a value of type @a@, or die with an -- exception. An @Async@ corresponds to a thread, and its 'ThreadId' -- can be obtained with 'asyncThreadId', although that should rarely -- be necessary. -- -- For example, to fetch two web pages at the same time, we could do -- this (assuming a suitable @getURL@ function): -- -- > do a1 <- async (getURL url1) -- > a2 <- async (getURL url2) -- > page1 <- wait a1 -- > page2 <- wait a2 -- > ... -- -- where 'async' starts the operation in a separate thread, and -- 'wait' waits for and returns the result. If the operation -- throws an exception, then that exception is re-thrown by -- 'wait'. This is one of the ways in which this library -- provides some additional safety: it is harder to accidentally -- forget about exceptions thrown in child threads. -- -- A slight improvement over the previous example is this: -- -- > withAsync (getURL url1) $ \a1 -> do -- > withAsync (getURL url2) $ \a2 -> do -- > page1 <- wait a1 -- > page2 <- wait a2 -- > ... -- -- 'withAsync' is like 'async', except that the 'Async' is -- automatically killed (using 'cancel') if the enclosing IO operation -- returns before it has completed. Consider the case when the first -- 'wait' throws an exception; then the second 'Async' will be -- automatically killed rather than being left to run in the -- background, possibly indefinitely. This is the second way that the -- library provides additional safety: using 'withAsync' means we can -- avoid accidentally leaving threads running. Furthermore, -- 'withAsync' allows a tree of threads to be built, such that -- children are automatically killed if their parents die for any -- reason. -- -- The pattern of performing two IO actions concurrently and waiting -- for their results is packaged up in a combinator 'concurrently', so -- we can further shorten the above example to: -- -- > (page1, page2) <- concurrently (getURL url1) (getURL url2) -- > ... -- -- The 'Functor' instance can be used to change the result of an -- 'Async'. For example: -- -- > ghci> a <- async (return 3) -- > ghci> wait a -- > 3 -- > ghci> wait (fmap (+1) a) -- > 4 ----------------------------------------------------------------------------- module Control.Concurrent.Async ( -- * Asynchronous actions Async, -- ** Spawning async, asyncBound, asyncOn, asyncWithUnmask, asyncOnWithUnmask, -- ** Spawning with automatic 'cancel'ation withAsync, withAsyncBound, withAsyncOn, withAsyncWithUnmask, withAsyncOnWithUnmask, -- ** Quering 'Async's wait, poll, waitCatch, cancel, cancelWith, asyncThreadId, -- ** STM operations waitSTM, pollSTM, waitCatchSTM, -- ** Waiting for multiple 'Async's waitAny, waitAnyCatch, waitAnyCancel, waitAnyCatchCancel, waitEither, waitEitherCatch, waitEitherCancel, waitEitherCatchCancel, waitEither_, waitBoth, -- ** Linking link, link2, -- * Convenient utilities race, race_, concurrently, mapConcurrently, Concurrently(..), ) where import Control.Concurrent.STM import Control.Exception import Control.Concurrent #if !MIN_VERSION_base(4,6,0) import Prelude hiding (catch) #endif import Control.Monad import Control.Applicative import Data.Traversable import GHC.Exts import GHC.IO hiding (finally, onException) import GHC.Conc -- ----------------------------------------------------------------------------- -- STM Async API -- | An asynchronous action spawned by 'async' or 'withAsync'. -- Asynchronous actions are executed in a separate thread, and -- operations are provided for waiting for asynchronous actions to -- complete and obtaining their results (see e.g. 'wait'). -- data Async a = Async { asyncThreadId :: {-# UNPACK #-} !ThreadId -- ^ Returns the 'ThreadId' of the thread running the given 'Async'. , _asyncWait :: STM (Either SomeException a) } instance Eq (Async a) where Async a _ == Async b _ = a == b instance Ord (Async a) where Async a _ `compare` Async b _ = a `compare` b instance Functor Async where fmap f (Async a w) = Async a (fmap (fmap f) w) -- | Spawn an asynchronous action in a separate thread. async :: IO a -> IO (Async a) async = inline asyncUsing rawForkIO -- | Like 'async' but using 'forkOS' internally. asyncBound :: IO a -> IO (Async a) asyncBound = asyncUsing forkOS -- | Like 'async' but using 'forkOn' internally. asyncOn :: Int -> IO a -> IO (Async a) asyncOn = asyncUsing . rawForkOn -- | Like 'async' but using 'forkIOWithUnmask' internally. -- The child thread is passed a function that can be used to unmask asynchronous exceptions. asyncWithUnmask :: ((forall b . IO b -> IO b) -> IO a) -> IO (Async a) asyncWithUnmask actionWith = asyncUsing rawForkIO (actionWith unsafeUnmask) -- | Like 'asyncOn' but using 'forkOnWithUnmask' internally. -- The child thread is passed a function that can be used to unmask asynchronous exceptions. asyncOnWithUnmask :: Int -> ((forall b . IO b -> IO b) -> IO a) -> IO (Async a) asyncOnWithUnmask cpu actionWith = asyncUsing (rawForkOn cpu) (actionWith unsafeUnmask) asyncUsing :: (IO () -> IO ThreadId) -> IO a -> IO (Async a) asyncUsing doFork = \action -> do var <- newEmptyTMVarIO -- t <- forkFinally action (\r -> atomically $ putTMVar var r) -- slightly faster: t <- mask $ \restore -> doFork $ try (restore action) >>= atomically . putTMVar var return (Async t (readTMVar var)) -- | Spawn an asynchronous action in a separate thread, and pass its -- @Async@ handle to the supplied function. When the function returns -- or throws an exception, 'cancel' is called on the @Async@. -- -- > withAsync action inner = bracket (async action) cancel inner -- -- This is a useful variant of 'async' that ensures an @Async@ is -- never left running unintentionally. -- -- Since 'cancel' may block, 'withAsync' may also block; see 'cancel' -- for details. -- withAsync :: IO a -> (Async a -> IO b) -> IO b withAsync = inline withAsyncUsing rawForkIO -- | Like 'withAsync' but uses 'forkOS' internally. withAsyncBound :: IO a -> (Async a -> IO b) -> IO b withAsyncBound = withAsyncUsing forkOS -- | Like 'withAsync' but uses 'forkOn' internally. withAsyncOn :: Int -> IO a -> (Async a -> IO b) -> IO b withAsyncOn = withAsyncUsing . rawForkOn -- | Like 'withAsync' but uses 'forkIOWithUnmask' internally. -- The child thread is passed a function that can be used to unmask asynchronous exceptions. withAsyncWithUnmask :: ((forall c. IO c -> IO c) -> IO a) -> (Async a -> IO b) -> IO b withAsyncWithUnmask actionWith = withAsyncUsing rawForkIO (actionWith unsafeUnmask) -- | Like 'withAsyncOn' but uses 'forkOnWithUnmask' internally. -- The child thread is passed a function that can be used to unmask asynchronous exceptions withAsyncOnWithUnmask :: Int -> ((forall c. IO c -> IO c) -> IO a) -> (Async a -> IO b) -> IO b withAsyncOnWithUnmask cpu actionWith = withAsyncUsing (rawForkOn cpu) (actionWith unsafeUnmask) withAsyncUsing :: (IO () -> IO ThreadId) -> IO a -> (Async a -> IO b) -> IO b -- The bracket version works, but is slow. We can do better by -- hand-coding it: withAsyncUsing doFork = \action inner -> do var <- newEmptyTMVarIO mask $ \restore -> do t <- doFork $ try (restore action) >>= atomically . putTMVar var let a = Async t (readTMVar var) r <- restore (inner a) `catchAll` \e -> do cancel a; throwIO e cancel a return r -- | Wait for an asynchronous action to complete, and return its -- value. If the asynchronous action threw an exception, then the -- exception is re-thrown by 'wait'. -- -- > wait = atomically . waitSTM -- {-# INLINE wait #-} wait :: Async a -> IO a wait = atomically . waitSTM -- | Wait for an asynchronous action to complete, and return either -- @Left e@ if the action raised an exception @e@, or @Right a@ if it -- returned a value @a@. -- -- > waitCatch = atomically . waitCatchSTM -- {-# INLINE waitCatch #-} waitCatch :: Async a -> IO (Either SomeException a) waitCatch = atomically . waitCatchSTM -- | Check whether an 'Async' has completed yet. If it has not -- completed yet, then the result is @Nothing@, otherwise the result -- is @Just e@ where @e@ is @Left x@ if the @Async@ raised an -- exception @x@, or @Right a@ if it returned a value @a@. -- -- > poll = atomically . pollSTM -- {-# INLINE poll #-} poll :: Async a -> IO (Maybe (Either SomeException a)) poll = atomically . pollSTM -- | A version of 'wait' that can be used inside an STM transaction. -- waitSTM :: Async a -> STM a waitSTM a = do r <- waitCatchSTM a either throwSTM return r -- | A version of 'waitCatch' that can be used inside an STM transaction. -- {-# INLINE waitCatchSTM #-} waitCatchSTM :: Async a -> STM (Either SomeException a) waitCatchSTM (Async _ w) = w -- | A version of 'poll' that can be used inside an STM transaction. -- {-# INLINE pollSTM #-} pollSTM :: Async a -> STM (Maybe (Either SomeException a)) pollSTM (Async _ w) = (Just <$> w) `orElse` return Nothing -- | Cancel an asynchronous action by throwing the @ThreadKilled@ -- exception to it. Has no effect if the 'Async' has already -- completed. -- -- > cancel a = throwTo (asyncThreadId a) ThreadKilled -- -- Note that 'cancel' is synchronous in the same sense as 'throwTo'. -- It does not return until the exception has been thrown in the -- target thread, or the target thread has completed. In particular, -- if the target thread is making a foreign call, the exception will -- not be thrown until the foreign call returns, and in this case -- 'cancel' may block indefinitely. An asynchronous 'cancel' can -- of course be obtained by wrapping 'cancel' itself in 'async'. -- {-# INLINE cancel #-} cancel :: Async a -> IO () cancel (Async t _) = throwTo t ThreadKilled -- | Cancel an asynchronous action by throwing the supplied exception -- to it. -- -- > cancelWith a x = throwTo (asyncThreadId a) x -- -- The notes about the synchronous nature of 'cancel' also apply to -- 'cancelWith'. cancelWith :: Exception e => Async a -> e -> IO () cancelWith (Async t _) e = throwTo t e -- | Wait for any of the supplied asynchronous operations to complete. -- The value returned is a pair of the 'Async' that completed, and the -- result that would be returned by 'wait' on that 'Async'. -- -- If multiple 'Async's complete or have completed, then the value -- returned corresponds to the first completed 'Async' in the list. -- waitAnyCatch :: [Async a] -> IO (Async a, Either SomeException a) waitAnyCatch asyncs = atomically $ foldr orElse retry $ map (\a -> do r <- waitCatchSTM a; return (a, r)) asyncs -- | Like 'waitAnyCatch', but also cancels the other asynchronous -- operations as soon as one has completed. -- waitAnyCatchCancel :: [Async a] -> IO (Async a, Either SomeException a) waitAnyCatchCancel asyncs = waitAnyCatch asyncs `finally` mapM_ cancel asyncs -- | Wait for any of the supplied @Async@s to complete. If the first -- to complete throws an exception, then that exception is re-thrown -- by 'waitAny'. -- -- If multiple 'Async's complete or have completed, then the value -- returned corresponds to the first completed 'Async' in the list. -- waitAny :: [Async a] -> IO (Async a, a) waitAny asyncs = atomically $ foldr orElse retry $ map (\a -> do r <- waitSTM a; return (a, r)) asyncs -- | Like 'waitAny', but also cancels the other asynchronous -- operations as soon as one has completed. -- waitAnyCancel :: [Async a] -> IO (Async a, a) waitAnyCancel asyncs = waitAny asyncs `finally` mapM_ cancel asyncs -- | Wait for the first of two @Async@s to finish. waitEitherCatch :: Async a -> Async b -> IO (Either (Either SomeException a) (Either SomeException b)) waitEitherCatch left right = atomically $ (Left <$> waitCatchSTM left) `orElse` (Right <$> waitCatchSTM right) -- | Like 'waitEitherCatch', but also 'cancel's both @Async@s before -- returning. -- waitEitherCatchCancel :: Async a -> Async b -> IO (Either (Either SomeException a) (Either SomeException b)) waitEitherCatchCancel left right = waitEitherCatch left right `finally` (cancel left >> cancel right) -- | Wait for the first of two @Async@s to finish. If the @Async@ -- that finished first raised an exception, then the exception is -- re-thrown by 'waitEither'. -- waitEither :: Async a -> Async b -> IO (Either a b) waitEither left right = atomically $ (Left <$> waitSTM left) `orElse` (Right <$> waitSTM right) -- | Like 'waitEither', but the result is ignored. -- waitEither_ :: Async a -> Async b -> IO () waitEither_ left right = atomically $ (void $ waitSTM left) `orElse` (void $ waitSTM right) -- | Like 'waitEither', but also 'cancel's both @Async@s before -- returning. -- waitEitherCancel :: Async a -> Async b -> IO (Either a b) waitEitherCancel left right = waitEither left right `finally` (cancel left >> cancel right) -- | Waits for both @Async@s to finish, but if either of them throws -- an exception before they have both finished, then the exception is -- re-thrown by 'waitBoth'. -- waitBoth :: Async a -> Async b -> IO (a,b) waitBoth left right = atomically $ do a <- waitSTM left `orElse` (waitSTM right >> retry) b <- waitSTM right return (a,b) -- | Link the given @Async@ to the current thread, such that if the -- @Async@ raises an exception, that exception will be re-thrown in -- the current thread. -- link :: Async a -> IO () link (Async _ w) = do me <- myThreadId void $ forkRepeat $ do r <- atomically $ w case r of Left e -> throwTo me e _ -> return () -- | Link two @Async@s together, such that if either raises an -- exception, the same exception is re-thrown in the other @Async@. -- link2 :: Async a -> Async b -> IO () link2 left@(Async tl _) right@(Async tr _) = void $ forkRepeat $ do r <- waitEitherCatch left right case r of Left (Left e) -> throwTo tr e Right (Left e) -> throwTo tl e _ -> return () -- ----------------------------------------------------------------------------- -- | Run two @IO@ actions concurrently, and return the first to -- finish. The loser of the race is 'cancel'led. -- -- > race left right = -- > withAsync left $ \a -> -- > withAsync right $ \b -> -- > waitEither a b -- race :: IO a -> IO b -> IO (Either a b) -- | Like 'race', but the result is ignored. -- race_ :: IO a -> IO b -> IO () -- | Run two @IO@ actions concurrently, and return both results. If -- either action throws an exception at any time, then the other -- action is 'cancel'led, and the exception is re-thrown by -- 'concurrently'. -- -- > concurrently left right = -- > withAsync left $ \a -> -- > withAsync right $ \b -> -- > waitBoth a b concurrently :: IO a -> IO b -> IO (a,b) #define USE_ASYNC_VERSIONS 0 #if USE_ASYNC_VERSIONS race left right = withAsync left $ \a -> withAsync right $ \b -> waitEither a b race_ left right = withAsync left $ \a -> withAsync right $ \b -> waitEither_ a b concurrently left right = withAsync left $ \a -> withAsync right $ \b -> waitBoth a b #else -- MVar versions of race/concurrently -- More ugly than the Async versions, but quite a bit faster. -- race :: IO a -> IO b -> IO (Either a b) race left right = concurrently' left right collect where collect m = do e <- takeMVar m case e of Left ex -> throwIO ex Right r -> return r -- race_ :: IO a -> IO b -> IO () race_ left right = void $ race left right -- concurrently :: IO a -> IO b -> IO (a,b) concurrently left right = concurrently' left right (collect []) where collect [Left a, Right b] _ = return (a,b) collect [Right b, Left a] _ = return (a,b) collect xs m = do e <- takeMVar m case e of Left ex -> throwIO ex Right r -> collect (r:xs) m concurrently' :: IO a -> IO b -> (MVar (Either SomeException (Either a b)) -> IO r) -> IO r concurrently' left right collect = do done <- newEmptyMVar mask $ \restore -> do lid <- forkIO $ restore (left >>= putMVar done . Right . Left) `catchAll` (putMVar done . Left) rid <- forkIO $ restore (right >>= putMVar done . Right . Right) `catchAll` (putMVar done . Left) let stop = killThread lid >> killThread rid r <- restore (collect done) `onException` stop stop return r #endif -- | maps an @IO@-performing function over any @Traversable@ data -- type, performing all the @IO@ actions concurrently, and returning -- the original data structure with the arguments replaced by the -- results. -- -- For example, @mapConcurrently@ works with lists: -- -- > pages <- mapConcurrently getURL ["url1", "url2", "url3"] -- mapConcurrently :: Traversable t => (a -> IO b) -> t a -> IO (t b) mapConcurrently f = runConcurrently . traverse (Concurrently . f) -- ----------------------------------------------------------------------------- -- | A value of type @Concurrently a@ is an @IO@ operation that can be -- composed with other @Concurrently@ values, using the @Applicative@ -- and @Alternative@ instances. -- -- Calling @runConcurrently@ on a value of type @Concurrently a@ will -- execute the @IO@ operations it contains concurrently, before -- delivering the result of type @a@. -- -- For example -- -- > (page1, page2, page3) -- > <- runConcurrently $ (,,) -- > <$> Concurrently (getURL "url1") -- > <*> Concurrently (getURL "url2") -- > <*> Concurrently (getURL "url3") -- newtype Concurrently a = Concurrently { runConcurrently :: IO a } instance Functor Concurrently where fmap f (Concurrently a) = Concurrently $ f <$> a instance Applicative Concurrently where pure = Concurrently . return Concurrently fs <*> Concurrently as = Concurrently $ (\(f, a) -> f a) <$> concurrently fs as instance Alternative Concurrently where empty = Concurrently $ forever (threadDelay maxBound) Concurrently as <|> Concurrently bs = Concurrently $ either id id <$> race as bs -- ---------------------------------------------------------------------------- -- | Fork a thread that runs the supplied action, and if it raises an -- exception, re-runs the action. The thread terminates only when the -- action runs to completion without raising an exception. forkRepeat :: IO a -> IO ThreadId forkRepeat action = mask $ \restore -> let go = do r <- tryAll (restore action) case r of Left _ -> go _ -> return () in forkIO go catchAll :: IO a -> (SomeException -> IO a) -> IO a catchAll = catch tryAll :: IO a -> IO (Either SomeException a) tryAll = try -- A version of forkIO that does not include the outer exception -- handler: saves a bit of time when we will be installing our own -- exception handler. {-# INLINE rawForkIO #-} rawForkIO :: IO () -> IO ThreadId rawForkIO action = IO $ \ s -> case (fork# action s) of (# s1, tid #) -> (# s1, ThreadId tid #) {-# INLINE rawForkOn #-} rawForkOn :: Int -> IO () -> IO ThreadId rawForkOn (I# cpu) action = IO $ \ s -> case (forkOn# cpu action s) of (# s1, tid #) -> (# s1, ThreadId tid #) async-2.0.1.4/test/0000755000000000000000000000000012041202635012131 5ustar0000000000000000async-2.0.1.4/test/test-async.hs0000644000000000000000000000525512041202635014566 0ustar0000000000000000{-# LANGUAGE ScopedTypeVariables,DeriveDataTypeable #-} module Main where import Test.Framework (defaultMain, testGroup) import Test.Framework.Providers.HUnit import Test.HUnit import Control.Concurrent.Async import Control.Exception import Data.Typeable import Control.Concurrent import Control.Monad import Data.Maybe import Prelude hiding (catch) main = defaultMain tests tests = [ testCase "async_wait" async_wait , testCase "async_waitCatch" async_waitCatch , testCase "async_exwait" async_exwait , testCase "async_exwaitCatch" async_exwaitCatch , testCase "withasync_waitCatch" withasync_waitCatch , testCase "withasync_wait2" withasync_wait2 , testGroup "async_cancel_rep" $ replicate 1000 $ testCase "async_cancel" async_cancel , testCase "async_poll" async_poll , testCase "async_poll2" async_poll2 ] value = 42 :: Int data TestException = TestException deriving (Eq,Show,Typeable) instance Exception TestException async_waitCatch :: Assertion async_waitCatch = do a <- async (return value) r <- waitCatch a case r of Left _ -> assertFailure "" Right e -> e @?= value async_wait :: Assertion async_wait = do a <- async (return value) r <- wait a assertEqual "async_wait" r value async_exwaitCatch :: Assertion async_exwaitCatch = do a <- async (throwIO TestException) r <- waitCatch a case r of Left e -> fromException e @?= Just TestException Right _ -> assertFailure "" async_exwait :: Assertion async_exwait = do a <- async (throwIO TestException) (wait a >> assertFailure "") `catch` \e -> e @?= TestException withasync_waitCatch :: Assertion withasync_waitCatch = do withAsync (return value) $ \a -> do r <- waitCatch a case r of Left _ -> assertFailure "" Right e -> e @?= value withasync_wait2 :: Assertion withasync_wait2 = do a <- withAsync (threadDelay 1000000) $ return r <- waitCatch a case r of Left e -> fromException e @?= Just ThreadKilled Right _ -> assertFailure "" async_cancel :: Assertion async_cancel = do a <- async (return value) cancelWith a TestException r <- waitCatch a case r of Left e -> fromException e @?= Just TestException Right r -> r @?= value async_poll :: Assertion async_poll = do a <- async (threadDelay 1000000) r <- poll a when (isJust r) $ assertFailure "" r <- poll a -- poll twice, just to check we don't deadlock when (isJust r) $ assertFailure "" async_poll2 :: Assertion async_poll2 = do a <- async (return value) wait a r <- poll a when (isNothing r) $ assertFailure "" r <- poll a -- poll twice, just to check we don't deadlock when (isNothing r) $ assertFailure "" async-2.0.1.4/bench/0000755000000000000000000000000012041202635012231 5ustar0000000000000000async-2.0.1.4/bench/race.hs0000644000000000000000000000033012041202635013473 0ustar0000000000000000import Control.Concurrent.Async import System.Environment import Control.Monad import Control.Concurrent main = runInUnboundThread $ do [n] <- fmap (fmap read) getArgs replicateM_ n $ race (return 1) (return 2)