mem.h File Reference

Memory handling functions. More...

#include <stddef.h>
#include <stdint.h>
#include "attributes.h"

Go to the source code of this file.

Macros
#define	av_malloc_attrib   __attribute__((__malloc__))
	Function attribute denoting a malloc-like function.
#define	av_alloc_size(...)   __attribute__((alloc_size(__VA_ARGS__)))
	Function attribute used on a function that allocates memory, whose size is given by the specified parameter(s).

Functions
void *	av_malloc (size_t size) av_malloc_attrib
	Allocate a memory block with alignment suitable for all memory accesses (including vectors if available on the CPU).
void *	av_mallocz (size_t size) av_malloc_attrib
	Allocate a memory block with alignment suitable for all memory accesses (including vectors if available on the CPU) and zero all the bytes of the block.
void *	av_malloc_array (size_t nmemb, size_t size)
	Allocate a memory block for an array with av_malloc().
void *	av_calloc (size_t nmemb, size_t size) av_malloc_attrib
	Allocate a memory block for an array with av_mallocz().
void *	av_realloc (void *ptr, size_t size)
	Allocate, reallocate, or free a block of memory.
av_warn_unused_result int	av_reallocp (void *ptr, size_t size)
	Allocate, reallocate, or free a block of memory through a pointer to a pointer.
void *	av_realloc_f (void *ptr, size_t nelem, size_t elsize)
	Allocate, reallocate, or free a block of memory.
void *	av_realloc_array (void *ptr, size_t nmemb, size_t size)
	Allocate, reallocate, or free an array.
int	av_reallocp_array (void *ptr, size_t nmemb, size_t size)
	Allocate, reallocate an array through a pointer to a pointer.
void *	av_fast_realloc (void *ptr, unsigned int *size, size_t min_size)
	Reallocate the given buffer if it is not large enough, otherwise do nothing.
void	av_fast_malloc (void *ptr, unsigned int *size, size_t min_size)
	Allocate a buffer, reusing the given one if large enough.
void	av_fast_mallocz (void *ptr, unsigned int *size, size_t min_size)
	Allocate and clear a buffer, reusing the given one if large enough.
void	av_free (void *ptr)
	Free a memory block which has been allocated with a function of av_malloc() or av_realloc() family.
void	av_freep (void *ptr)
	Free a memory block which has been allocated with a function of av_malloc() or av_realloc() family, and set the pointer pointing to it to NULL.
char *	av_strdup (const char *s) av_malloc_attrib
	Duplicate a string.
char *	av_strndup (const char *s, size_t len) av_malloc_attrib
	Duplicate a substring of a string.
void *	av_memdup (const void *p, size_t size)
	Duplicate a buffer with av_malloc().
void	av_memcpy_backptr (uint8_t *dst, int back, int cnt)
	Overlapping memcpy() implementation.
void	av_dynarray_add (void *tab_ptr, int *nb_ptr, void *elem)
	Add the pointer to an element to a dynamic array.
av_warn_unused_result int	av_dynarray_add_nofree (void *tab_ptr, int *nb_ptr, void *elem)
	Add an element to a dynamic array.
void *	av_dynarray2_add (void **tab_ptr, int *nb_ptr, size_t elem_size, const uint8_t *elem_data)
	Add an element of size elem_size to a dynamic array.
int	av_size_mult (size_t a, size_t b, size_t *r)
	Multiply two size_t values checking for overflow.
void	av_max_alloc (size_t max)
	Set the maximum size that may be allocated in one block.

Detailed Description

Memory handling functions.

Definition in file mem.h.