[FFmpeg-devel] [RFC] Windows issues with av_destruct_packet_nofree

[Michael Niedermayer]

On Thu, Feb 19, 2009 at 08:50:42AM -0800, Art Clarke wrote:
> On Thu, Feb 19, 2009 at 8:14 AM, M?ns Rullg?rd <mans at mansr.com> wrote:
> 
> > Michael Niedermayer <michaelni at gmx.at> writes:
> >
> > > On Thu, Feb 19, 2009 at 07:57:47AM -0800, Art Clarke wrote:
> > > [...]
> > >> As Mans' pointed out, comparing function pointer across shared-object
> > >> boundaries is undefined.  It turns out to work fine for Linux and Mac
> > OS's,
> > >> but on Windows, our copy of "av_destruct_packet_nofree" is actually a
> > stub
> > >> pointing to the method in AVFORMAT.DLL, and inside
> > libavutils/utils.c:316
> > >> av_dup_packet, the following code then return false when we expected
> > true:
> > >
> > > what mans meant i think was that it is perfectly well defined and some
> > things
> > > are broken and violate the C standard
> >
> > Yes, that is what I meant.  I am also in favour of a restraining order
> > on Ulrich Drepper.
> >
> 
> Fair enough, although I am not aware of a C compiler that will work as
> specified in this area on Microsoft Windows (without all the __dllimport,
> __dllexport crap) (GCC/G++ and MSVC both fail).
> 
> That said, I think we an all admit it's Windows being stupid.  The question
> is, do we modify avformat.h to warn users, or wait 6-months for the next
> nincompoop to run into this?

ill think about this once someone posts a patch

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

He who knows, does not speak. He who speaks, does not know. -- Lao Tsu
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