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{-# LANGUAGE CPP #-}
module Network.Socket.BufferPool.Windows
( windowsThreadBlockHack
) where
#ifdef mingw32_HOST_OS
import Control.Concurrent.MVar
import Control.Concurrent
import qualified Control.Exception
import Control.Monad
-- | Allow main socket listening thread to be interrupted on Windows platform
windowsThreadBlockHack :: IO a -> IO a
windowsThreadBlockHack act = do
var <- newEmptyMVar :: IO (MVar (Either Control.Exception.SomeException a))
-- Catch and rethrow even async exceptions, so don't bother with UnliftIO
void . forkIO $ Control.Exception.try act >>= putMVar var
res <- takeMVar var
case res of
Left e -> Control.Exception.throwIO e
Right r -> return r
#else
windowsThreadBlockHack :: IO a -> IO a
windowsThreadBlockHack = id
#endif
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