[Haskell-cafe] peekCString & free memory
bulat.ziganshin at gmail.com
Sun Nov 29 12:55:52 EST 2009
Sunday, November 29, 2009, 8:00:02 PM, you wrote:
segfault is due to free, you may omit peekCString call.
you should free only memory that was malloced and not freed other way
> I get a segfault when I do
> str <- peekCString ptr
> free ptr
> return (Just str)
> But not when I don't free the C pointer.
> I also get the same behaviour with ByteString.packCString...
> Could you please tell me if the memory is correctly freed by GHC when I don't do it myself?
> And how can I specify a custom free function (i.e. xmlFree function in libxml2)?
> Maybe I should use a data type with two fields : the
> String/ByteString and the ForeignPtr to the CString?
Bulat mailto:Bulat.Ziganshin at gmail.com
More information about the Haskell-Cafe