X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=Foreign%2FPtr.hs;h=7ab3c02451674fea65f8c981da99a2fd26794690;hb=5d2171fd1b2a2fed99e1b2502d5611a11031efc5;hp=125759e0638dd8a469707a413e3be5a9444eec2c;hpb=c7b9b8a5aa78b28aa2f9a35b22a2f1416a6f2938;p=haskell-directory.git

diff --git a/Foreign/Ptr.hs b/Foreign/Ptr.hs
index 125759e..7ab3c02 100644
--- a/Foreign/Ptr.hs
+++ b/Foreign/Ptr.hs
@@ -1,4 +1,4 @@
-{-# OPTIONS -fno-implicit-prelude #-}
+{-# OPTIONS_GHC -fno-implicit-prelude #-}
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  Foreign.Ptr
@@ -9,7 +9,7 @@
 -- Stability   :  provisional
 -- Portability :  portable
 --
--- The "Ptr" module provides typed pointers to foreign data.  It is part
+-- This module provides typed pointers to foreign data.  It is part
 -- of the Foreign Function Interface (FFI) and will normally be
 -- imported via the "Foreign" module.
 --
@@ -50,15 +50,36 @@ import GHC.Show
 import Numeric
 #endif
 
-#include "MachDeps.h"
+#ifdef __NHC__
+import NHC.FFI
+  ( Ptr
+  , nullPtr
+  , castPtr
+  , plusPtr
+  , alignPtr
+  , minusPtr
+  , FunPtr
+  , nullFunPtr
+  , castFunPtr
+  , castFunPtrToPtr
+  , castPtrToFunPtr
+  , freeHaskellFunPtr
+  )
+#endif
+
+#ifdef __HUGS__
+import Hugs.Ptr
+#endif
 
 #ifdef __GLASGOW_HASKELL__
+#include "MachDeps.h"
+
 #if (WORD_SIZE_IN_BITS == 32 || WORD_SIZE_IN_BITS == 64)
 instance Show (Ptr a) where
    showsPrec p (Ptr a) rs = pad_out (showHex (word2Integer(int2Word#(addr2Int# a))) "") rs
      where
         -- want 0s prefixed to pad it out to a fixed length.
-       pad_out ('0':'x':ls) rs = 
+       pad_out ls rs = 
 	  '0':'x':(replicate (2*SIZEOF_HSPTR - length ls) '0') ++ ls ++ rs
        -- word2Integer :: Word# -> Integer (stolen from Word.lhs)
        word2Integer w = case word2Integer# w of
@@ -67,7 +88,11 @@ instance Show (Ptr a) where
 instance Show (FunPtr a) where
    showsPrec p = showsPrec p . castFunPtrToPtr
 #endif
-#endif
 
+-- | Release the storage associated with the given 'FunPtr', which
+-- must have been obtained from a wrapper stub.  This should be called
+-- whenever the return value from a foreign import wrapper function is
+-- no longer required; otherwise, the storage it uses will leak.
 foreign import ccall unsafe "freeHaskellFunctionPtr"
     freeHaskellFunPtr :: FunPtr a -> IO ()
+#endif