From 3feb3d6ce4be0a09a9f8f13d613bed25b523b6e7 Mon Sep 17 00:00:00 2001 From: Luca Barbato Date: Sun, 15 Sep 2013 21:42:07 +0200 Subject: mem: Introduce av_reallocp --- libavutil/mem.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'libavutil/mem.h') diff --git a/libavutil/mem.h b/libavutil/mem.h index b473dd7460..f51682bb08 100644 --- a/libavutil/mem.h +++ b/libavutil/mem.h @@ -116,6 +116,25 @@ 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 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. + * @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); + /** * Allocate or reallocate an array. * If ptr is NULL and nmemb > 0, allocate a new block. If -- cgit v1.2.3