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Label a couple of internal threads #163

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Label a couple of internal threads #163

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4 changes: 3 additions & 1 deletion Control/Concurrent/Async/Internal.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -55,7 +55,7 @@ import Data.IORef

import GHC.Exts
import GHC.IO hiding (finally, onException)
import GHC.Conc (ThreadId(..))
import GHC.Conc (ThreadId(..), labelThread)

-- -----------------------------------------------------------------------------
-- STM Async API
Expand Down Expand Up @@ -504,6 +504,7 @@ linkOnly
linkOnly shouldThrow a = do
me <- myThreadId
void $ forkRepeat $ do
myThreadId >>= flip labelThread ("linkOnly " ++ show (asyncThreadId a) ++ " -> " ++ show me)
r <- waitCatch a
case r of
Left e | shouldThrow e -> throwTo me (ExceptionInLinkedThread a e)
Expand Down Expand Up @@ -684,6 +685,7 @@ concurrently' left right collect = do
-- putMVar.
when (count' > 0) $
void $ forkIO $ do
myThreadId >>= flip labelThread "concurrent stop"
throwTo rid AsyncCancelled
throwTo lid AsyncCancelled
-- ensure the children are really dead
Expand Down