src/Streamly/Memory/Malloc.hs · streamly

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streamly/src/Streamly/Memory/Malloc.hs

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1{-# LANGUAGE CPP #-}

2{-# LANGUAGE BangPatterns #-}

3{-# LANGUAGE ExistentialQuantification #-}

4{-# LANGUAGE MagicHash #-}

5{-# LANGUAGE RecordWildCards #-}

6{-# LANGUAGE ScopedTypeVariables #-}

7{-# LANGUAGE TypeFamilies #-}

8{-# LANGUAGE UnboxedTuples #-}

9{-# LANGUAGE FlexibleContexts #-}

11#include "inline.hs"

13-- |

14-- Module : Streamly.Memory.Malloc

16--

17-- License : BSD3

18-- Maintainer : streamly@composewell.com

19-- Stability : experimental

20-- Portability : GHC

21--

22module Streamly.Memory.Malloc

23 (

24 mallocForeignPtrAlignedBytes

25 , mallocForeignPtrAlignedUnmanagedBytes

26 )

27where

29#define USE_GHC_MALLOC

31import Foreign.ForeignPtr (ForeignPtr, newForeignPtr_)

32import Foreign.Marshal.Alloc (mallocBytes)

33#ifndef USE_GHC_MALLOC

34import Foreign.ForeignPtr (newForeignPtr)

35import Foreign.Marshal.Alloc (finalizerFree)

36#endif

38import qualified GHC.ForeignPtr as GHC

40{-# INLINE mallocForeignPtrAlignedBytes #-}

41mallocForeignPtrAlignedBytes :: Int -> Int -> IO (GHC.ForeignPtr a)

42#ifdef USE_GHC_MALLOC

43mallocForeignPtrAlignedBytes size alignment = do

44 GHC.mallocPlainForeignPtrAlignedBytes size alignment

45#else

46mallocForeignPtrAlignedBytes size _alignment = do

47 p <- mallocBytes size

48 newForeignPtr finalizerFree p

49#endif

51-- memalign alignment size

52-- foreign import ccall unsafe "stdlib.h posix_memalign" _memalign :: CSize -> CSize -> IO (Ptr a)

54mallocForeignPtrAlignedUnmanagedBytes :: Int -> Int -> IO (ForeignPtr a)

55mallocForeignPtrAlignedUnmanagedBytes size _alignment = do

56 -- XXX use posix_memalign/aligned_alloc for aligned allocation

57 p <- mallocBytes size

58 newForeignPtr_ p