av_reallocp()

On Sun, Sep 15, 2013 at 09:44:49PM +0200, Luca Barbato wrote:
> --- a/libavutil/mem.h
> +++ b/libavutil/mem.h
> @@ -117,6 +117,25 @@ av_alloc_size(1, 2) static inline void 
> *av_malloc_array(size_t nmemb, size_t siz
>  void *av_realloc(void *ptr, size_t size) av_alloc_size(2);
> 
>  /**
> + * Allocate or reallocate an block of memory.

a block

> + * If *ptr is NULL and size > 0, allocate a new block. If
> + * size is zero, free the memory block pointed to by ptr.
> + * @param ptr Pointer to a pointer to a memory block already allocated
> + * with av_realloc(), or pointer to a pointer to NULL.
> + * The pointer is updated on success, or freed on failure.
> + * @param size Size in bytes for the memory block to be allocated or
> + * reallocated
> + * @return Zero on success, an AVERROR error code on failure.
> + * @warning Pointers originating from the av_malloc() family of functions 
> must
> + *          not be passed to av_reallocp(). The former can be implemented 
> using
> + *          memalign() (or other functions), and there is no guarantee that
> + *          pointers from such functions can be passed to realloc() at all.
> + *          The situation is undefined according to POSIX and may crash with
> + *          some libc implementations.
> + */
> +int av_reallocp(void *ptr, size_t size);

Please indent the parameter description text like the @warning paragraph.

IIRC Martin already OKed the meat of this patch.

Diego
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