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Merge pull request #77 from gamazeps/cancel

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Make cancel blocking
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Michael Walker 2017-04-05 20:33:23 +01:00 committed by GitHub
commit dcddfa42a5
1 changed files with 1 additions and 1 deletions
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concurrency/Control/Concurrent/Classy/Async.hs
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@ -292,7 +292,7 @@ waitCatchSTM (Async _ w) = w
-- 'cancel' can of course be obtained by wrapping 'cancel' itself in
-- 'async'.
cancel :: MonadConc m => Async m a -> m ()
cancel (Async tid _) = throwTo tid ThreadKilled
cancel a@(Async tid _) = throwTo tid ThreadKilled <* waitCatch a
-- | Cancel an asynchronous action by throwing the supplied exception
-- to it.