On Sun, Nov 25, 2018 at 05:55:37PM -0800, Mark Harris wrote: > On 2018-11-25 17:29, James Almer wrote: > > On 11/25/2018 10:01 PM, Michael Niedermayer wrote: > >> On Sat, Nov 24, 2018 at 01:02:02PM -0800, Mark Harris wrote: > >>> The alloc_size attribute is valid only on functions that return a > >>> pointer. GCC 9 (not yet released) warns about invalid usage: > >>> > >>> ./libavutil/mem.h:342:1: warning: 'alloc_size' attribute ignored on a > >>> function returning int' [-Wattributes] > >>> 342 | av_alloc_size(2, 3) int av_reallocp_array(void *ptr, size_t > >>> nmemb, size_t size); > >>> | ^~~~~~~~~~~~~ > >> > >> Is the attribute also useless on all other compilers ? > > > > The attribute is only used when __GNUC__ is defined, so it should for > > any such compiler (GCC and Clang). > > > > https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html > > > > The Clang documentation does note a minor difference from GCC, but both > GCC and Clang agree that it applies to functions that return a pointer. > The size is the number of bytes allocated at that pointer. It doesn't > support an indirect reference to the allocated memory; if it did it > would likely need an additional parameter to indicate which argument was > the indirect reference.
ok, will apply thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Never trust a computer, one day, it may think you are the virus. -- Compn
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