2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * Memory handling functions.
30 #define DECLARE_ALIGNED(n,t,v) t v __attribute__ ((aligned (n)))
32 #define DECLARE_ALIGNED(n,t,v) __declspec(align(n)) t v
36 * Allocate a block of \p size bytes with alignment suitable for all
37 * memory accesses (including vectors if available on the CPU).
38 * @param size Size in bytes for the memory block to be allocated.
39 * @return Pointer to the allocated block, NULL if it cannot allocate
43 void *av_malloc(unsigned int size);
46 * Allocate or reallocate a block of memory.
47 * If \p ptr is NULL and \p size > 0, allocate a new block. If \p
48 * size is zero, free the memory block pointed by \p ptr.
49 * @param size Size in bytes for the memory block to be allocated or
51 * @param ptr Pointer to a memory block already allocated with
52 * av_malloc(z)() or av_realloc() or NULL.
53 * @return Pointer to a newly reallocated block or NULL if it cannot
54 * reallocate or the function is used to free the memory block.
55 * @see av_fast_realloc()
57 void *av_realloc(void *ptr, unsigned int size);
60 * Free a memory block which has been allocated with av_malloc(z)() or
62 * @param ptr Pointer to the memory block which should be freed.
63 * @note ptr = NULL is explicitly allowed.
64 * @note It is recommended that you use av_freep() instead.
67 void av_free(void *ptr);
70 * Allocate a block of \p size bytes with alignment suitable for all
71 * memory accesses (including vectors if available on the CPU) and
72 * set to zeroes all the bytes of the block.
73 * @param size Size in bytes for the memory block to be allocated.
74 * @return Pointer to the allocated block, NULL if it cannot allocate
78 void *av_mallocz(unsigned int size);
81 * Duplicate the string \p s.
82 * @param s String to be duplicated.
83 * @return Pointer to a newly allocated string containing a
84 * copy of \p s or NULL if it cannot be allocated.
86 char *av_strdup(const char *s);
89 * Free a memory block which has been allocated with av_malloc(z)() or
90 * av_realloc() and set to NULL the pointer to it.
91 * @param ptr Pointer to the pointer to the memory block which should
95 void av_freep(void *ptr);
97 #endif /* FFMPEG_MEM_H */