put 'unsafeCoerce' in a standard location

[haskell-directory.git] / GHC / ForeignPtr.hs

diff --git a/GHC/ForeignPtr.hs b/GHC/ForeignPtr.hs
index b0850df..bb74f0b 100644 (file)
--- a/GHC/ForeignPtr.hs
+++ b/GHC/ForeignPtr.hs
@@ -86,22 +86,6 @@ instance Ord (ForeignPtr a) where
 instance Show (ForeignPtr a) where
     showsPrec p f = showsPrec p (unsafeForeignPtrToPtr f)
 
-#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 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
-                       (# s, d #) -> J# s d
-
-instance Show (FunPtr a) where
-   showsPrec p = showsPrec p . castFunPtrToPtr
-#endif
 
 -- |A Finalizer is represented as a pointer to a foreign function that, at
 -- finalisation time, gets as an argument a plain pointer variant of the
@@ -183,7 +167,7 @@ mallocForeignPtrBytes (I# size) = do
 -- mallocPlainForeignPtr. This is useful for ForeignPtrs that will live
 -- only inside Haskell (such as those created for packed strings).
 -- Attempts to add a finalizer to a ForeignPtr created this way, or to
--- finalize such a pointer, will have no effect.
+-- finalize such a pointer, will throw an exception.
 -- 
 mallocPlainForeignPtr :: Storable a => IO (ForeignPtr a)
 mallocPlainForeignPtr = doMalloc undefined
@@ -197,7 +181,8 @@ mallocPlainForeignPtr = doMalloc undefined
 
 -- | This function is similar to 'mallocForeignPtrBytes', except that
 -- the internally an optimised ForeignPtr representation with no
--- finalizer is used.
+-- finalizer is used. Attempts to add a finalizer will cause an
+-- exception to be thrown.
 mallocPlainForeignPtrBytes :: Int -> IO (ForeignPtr a)
 mallocPlainForeignPtrBytes (I# size) = IO $ \s ->
     case newPinnedByteArray# size s      of { (# s, mbarr# #) ->