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Wireshark-dev: Re: [Wireshark-dev] Except.c build errors

From: Kovarththanan Rajaratnam <kovarththanan.rajaratnam@xxxxxxxxx>
Date: Mon, 17 Aug 2009 21:38:42 +0200
Guy Harris wrote:
On Aug 16, 2009, at 9:32 PM, Kovarththanan Rajaratnam wrote:

 > I'm not sure that casting a pointer to g_malloc() to a pointer to a
function taking a size_t as an argument would work on platforms where sizeof(size_t) != sizeof(gulong); Win64 is, as far as I know, one such platform, as it's LLP64, so "gulong" is 32 bits and "size_t" is 64 bits, and we do support Win64.

I really wish the GLib people had used gsize in a bunch of their APIs; gulong and size_t are the same size in ILP32 and LP64 platforms, so the only place where fixing that would cause problems would be LLP64 platforms such as Win64. Whether they *will* fix it is another matter....

I would vote either for using Martin's patch or for writing a wrapper around g_malloc() that takes a size_t as an argument.

I actually added the cast because I thought it would be safe for the same reasons you've already mentioned: gsize is only an issue on Win64 and on this platform we bundle the newest version of GLib where the gsize/gulong mismatch has already been fixed:

http://git.gnome.org/cgit/glib/commit/?id=1fcaf2fe8d5118451e5d9da3347f711b623d504d

Is it ok to keep r29451?

Best regards,
Kovarththanan Rajaratnam