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{-# LANGUAGE MagicHash #-}
{-# LANGUAGE UnboxedTuples #-}
{-# LANGUAGE UnliftedFFITypes #-}
{-# OPTIONS_GHC -fbyte-code #-}
module Main where
import GHC.Prim
import GHC.IO
import Foreign.C
main :: IO ()
main = testThreadId >> putStrLn "OK"
testThreadId :: IO CInt
testThreadId = IO $ \s0 ->
case myThreadId# s0 of
(# s1, tid #) -> (# s1, c_getThreadId tid #)
foreign import ccall unsafe "rts_getThreadId" c_getThreadId :: ThreadId# -> CInt
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