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{-# LANGUAGE NoImplicitPrelude, MagicHash, UnboxedTuples #-}
module Control.Concurrent.Raw ( rawForkIO, rawForkOn ) where
import Data.Function ( ($) )
import GHC.IO ( IO(IO) )
import GHC.Exts ( Int(I#), fork#, forkOn# )
import GHC.Conc ( ThreadId(ThreadId) )
-- A version of forkIO that does not include the outer exception
-- handler: saves a bit of time when we will be installing our own
-- exception handler.
{-# INLINE rawForkIO #-}
rawForkIO :: IO () -> IO ThreadId
rawForkIO action = IO $ \s ->
case (fork# action s) of (# s1, tid #) -> (# s1, ThreadId tid #)
{-# INLINE rawForkOn #-}
rawForkOn :: Int -> IO () -> IO ThreadId
rawForkOn (I# cpu) action = IO $ \s ->
case (forkOn# cpu action s) of (# s1, tid #) -> (# s1, ThreadId tid #)
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