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NathanHowell/gist:5557902

Created May 10, 2013 22:27
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gistfile1.hs
{-# LANGUAGE FlexibleContexts #-}
import Control.Monad.Base
import Control.Monad.Trans.Control
import Control.Concurrent.MSem as MSem
withMSem :: (MonadBaseControl IO m, Integral i) => MSem i -> m a -> m a
withMSem = liftBaseOp_ . MSem.with
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