[FFmpeg-devel] [PATCH] avutil/mem: fix outdated comment
michael at niedermayer.cc
Thu Jul 28 12:57:25 EEST 2016
On Thu, Jul 28, 2016 at 11:50:47AM +0200, Michael Niedermayer wrote:
> On Mon, Jul 18, 2016 at 11:36:49PM +0800, Zhao Zhili wrote:
> > ---
> > libavutil/mem.h | 6 +++---
> > 1 file changed, 3 insertions(+), 3 deletions(-)
> > diff --git a/libavutil/mem.h b/libavutil/mem.h
> > index d25b322..9dd9099 100644
> > --- a/libavutil/mem.h
> > +++ b/libavutil/mem.h
> > @@ -99,14 +99,14 @@ av_alloc_size(1, 2) static inline void
> > *av_malloc_array(size_t nmemb, size_t siz
> > /**
> > * Allocate or reallocate a block of memory.
> > - * If ptr is NULL and size > 0, allocate a new block. If
> > - * size is zero, free the memory block pointed to by ptr.
> > + * If ptr is NULL and size > 0, allocate a new block. The memory block
> > pointed
> > + * to by ptr won't be freed even when size is zero.
> av_realloc() can certainly free the source pointed to
> be ptr as it sees fit during reallocation also when the size is 0.
> we could document it either as
> The behavior with size 0 may be that an allocated array of small size
> is returned instead of the null pointer and complete deallocation
this in fact also doesnt work as description, as it would leave
identifying realloc errors with size 0 impossible
> or With size 0 an allocated array of minimal size is provided, accesses
> into such size 0 array result in undefined behavior.
> or similar
> question is how much room for changes we want ...
> Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
> Those who are too smart to engage in politics are punished by being
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> ffmpeg-devel at ffmpeg.org
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
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