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mem: Document the av_realloc family of functions properly

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realloc() does not accept pointers from memalign().
This commit is contained in:
Luca Barbato 2013-09-01 19:46:59 +02:00
parent 7f9e893f56
commit b4ec7a5fee
1 changed files with 9 additions and 3 deletions
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12
libavutil/mem.h
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@ -101,8 +101,10 @@ 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.
* @note Pointers provided by av_malloc family of functions cannot be
* passed to av_realloc().
* @param ptr Pointer to a memory block already allocated with
* av_malloc(z)() or av_realloc() or NULL.
* av_realloc() or NULL.
* @param size Size in bytes for the memory block to be allocated or
* reallocated.
* @return Pointer to a newly reallocated block or NULL if the block
@ -115,8 +117,10 @@ void *av_realloc(void *ptr, size_t size) av_alloc_size(2);
* Allocate or reallocate an array.
* If ptr is NULL and nmemb > 0, allocate a new block. If
* nmemb is zero, free the memory block pointed to by ptr.
* @note Pointers provided by av_malloc family of functions cannot be
* passed to av_realloc_array().
* @param ptr Pointer to a memory block already allocated with
* av_malloc(z)() or av_realloc() or NULL.
* av_realloc() or NULL.
* @param nmemb Number of elements
* @param size Size of the single element
* @return Pointer to a newly reallocated block or NULL if the block
@ -128,8 +132,10 @@ av_alloc_size(2, 3) void *av_realloc_array(void *ptr, size_t nmemb, size_t size)
* Allocate or reallocate an array.
* If *ptr is NULL and nmemb > 0, allocate a new block. If
* nmemb is zero, free the memory block pointed to by ptr.
* @note Pointers provided by av_malloc family of functions cannot be
* passed to av_reallocp_array().
* @param ptr Pointer to a pointer to a memory block already allocated
* with av_malloc(z)() or av_realloc(), or pointer to a pointer to NULL.
* with av_realloc(), or pointer to a pointer to NULL.
* The pointer is updated on success, or freed on failure.
* @param nmemb Number of elements
* @param size Size of the single element