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mem: Introduce av_reallocp

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Luca Barbato
2013-09-15 21:42:07 +02:00
parent 187105ff8a
commit 3feb3d6ce4
4 changed files with 39 additions and 1 deletions
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19
libavutil/mem.h
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@@ -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