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Throw exceptions from threads #86

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Throw exceptions from threads #86

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4 changes: 3 additions & 1 deletion Network/IRC/Client/Utils.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,7 @@ module Network.IRC.Client.Utils

import Control.Concurrent (ThreadId, forkFinally, myThreadId)
import Control.Concurrent.STM (STM, TVar, atomically, modifyTVar)
import Control.Exception (throwIO)
import Control.Monad.IO.Class (liftIO)
import qualified Data.Set as S
import Data.Text (Text)
Expand Down Expand Up @@ -149,8 +150,9 @@ fork :: IRC s () -> IRC s ThreadId
fork ma = do
s <- getIRCState
liftIO $ do
tid <- forkFinally (runIRCAction ma s) $ \_ -> do
tid <- forkFinally (runIRCAction ma s) $ \res -> do
tid <- myThreadId
atomically $ modifyTVar (_runningThreads s) (S.delete tid)
either throwIO pure res
atomically $ modifyTVar (_runningThreads s) (S.insert tid)
pure tid