mem.h File Reference

memory handling functions More...

#include <limits.h>
#include <stdint.h>
#include "attributes.h"
#include "error.h"
#include "avutil.h"

Go to the source code of this file.

Macros
#define	DECLARE_ALIGNED(n, t, v)   t __attribute__ ((aligned (n))) v
#define	DECLARE_ASM_CONST(n, t, v)   static const t av_used __attribute__ ((aligned (n))) v
#define	av_malloc_attrib   __attribute__((__malloc__))
#define	av_alloc_size(...)   __attribute__((alloc_size(__VA_ARGS__)))

Functions
void *	av_malloc (size_t size) av_malloc_attrib 1(1)
	Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if available on the CPU). More...
static void *	av_malloc_array (size_t nmemb, size_t size)
void *	av_realloc (void *ptr, size_t size) 1(2)
	Allocate or reallocate a block of memory. More...
void *	av_realloc_f (void *ptr, size_t nelem, size_t elsize)
	Allocate or reallocate a block of memory. More...
av_warn_unused_result int	av_reallocp (void *ptr, size_t size)
	Allocate or reallocate a block of memory. More...
void *	av_realloc_array (void *ptr, size_t nmemb, size_t size)
int	av_reallocp_array (void *ptr, size_t nmemb, size_t size)
void	av_free (void *ptr)
	Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). More...
void *	av_mallocz (size_t size) av_malloc_attrib 1(1)
	Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if available on the CPU) and zero all the bytes of the block. More...
void *	av_calloc (size_t nmemb, size_t size) av_malloc_attrib
	Allocate a block of nmemb * size bytes with alignment suitable for all memory accesses (including vectors if available on the CPU) and zero all the bytes of the block. More...
static void *	av_mallocz_array (size_t nmemb, size_t size)
char *	av_strdup (const char *s) av_malloc_attrib
	Duplicate the string s. More...
char *	av_strndup (const char *s, size_t len) av_malloc_attrib
	Duplicate a substring of the string s. More...
void *	av_memdup (const void *p, size_t size)
	Duplicate the buffer p. More...
void	av_freep (void *ptr)
	Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer pointing to it to NULL. More...
void	av_dynarray_add (void *tab_ptr, int *nb_ptr, void *elem)
	Add an element to a dynamic array. More...
av_warn_unused_result int	av_dynarray_add_nofree (void *tab_ptr, int *nb_ptr, void *elem)
	Add an element to a dynamic array. More...
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. More...
static int	av_size_mult (size_t a, size_t b, size_t *r)
	Multiply two size_t values checking for overflow. More...
void	av_max_alloc (size_t max)
	Set the maximum size that may me allocated in one block. More...
void	av_memcpy_backptr (uint8_t *dst, int back, int cnt)
	deliberately overlapping memcpy implementation More...
void *	av_fast_realloc (void *ptr, unsigned int *size, size_t min_size)
	Reallocate the given block if it is not large enough, otherwise do nothing. More...
void	av_fast_malloc (void *ptr, unsigned int *size, size_t min_size)
	Allocate a buffer, reusing the given one if large enough. More...
void	av_fast_mallocz (void *ptr, unsigned int *size, size_t min_size)
	Allocate a buffer, reusing the given one if large enough. More...

Detailed Description

memory handling functions

Definition in file mem.h.