System/IO/Unsafe.hs

{-# LANGUAGE CPP, NoImplicitPrelude #-}

-----------------------------------------------------------------------------
-- |
-- Module : System.IO.Unsafe
-- Copyright : (c) The University of Glasgow 2001
-- License : BSD-style (see the file libraries/base/LICENSE)
-- 
-- Maintainer : libraries@haskell.org
-- Stability : provisional
-- Portability : portable
--
-- \"Unsafe\" IO operations.
--
-----------------------------------------------------------------------------

module System.IO.Unsafe (
 -- * Unsafe 'System.IO.IO' operations
 unsafePerformIO, -- :: IO a -> a
 unsafeDupablePerformIO, -- :: IO a -> a
 unsafeInterleaveIO, -- :: IO a -> IO a
 ) where

#ifdef __GLASGOW_HASKELL__
import GHC.IO (unsafePerformIO, unsafeInterleaveIO, unsafeDupablePerformIO)
#endif

#ifdef __HUGS__
import Hugs.IOExts (unsafePerformIO, unsafeInterleaveIO)
unsafeDupablePerformIO = unsafePerformIO
#endif

#ifdef __NHC__
import NHC.Internal (unsafePerformIO, unsafeInterleaveIO)
unsafeDupablePerformIO = unsafePerformIO
#endif