FFmpeg
mem_internal.h
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1 /*
2  * Copyright (c) 2002 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
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.
10  *
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.
15  *
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
19  */
20 
21 #ifndef AVUTIL_MEM_INTERNAL_H
22 #define AVUTIL_MEM_INTERNAL_H
23 
24 #include "avassert.h"
25 #include "mem.h"
26 
27 static inline int ff_fast_malloc(void *ptr, unsigned int *size, size_t min_size, int zero_realloc)
28 {
29  void *val;
30 
31  memcpy(&val, ptr, sizeof(val));
32  if (min_size <= *size) {
33  av_assert0(val || !min_size);
34  return 0;
35  }
36  min_size = FFMAX(min_size + min_size / 16 + 32, min_size);
37  av_freep(ptr);
38  val = zero_realloc ? av_mallocz(min_size) : av_malloc(min_size);
39  memcpy(ptr, &val, sizeof(val));
40  if (!val)
41  min_size = 0;
42  *size = min_size;
43  return 1;
44 }
45 #endif /* AVUTIL_MEM_INTERNAL_H */
const char const char void * val
Definition: avisynth_c.h:863
Memory handling functions.
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define av_malloc(s)
ptrdiff_t size
Definition: opengl_enc.c:100
simple assert() macros that are a bit more flexible than ISO C assert().
#define FFMAX(a, b)
Definition: common.h:94
#define av_freep(p)
static int ff_fast_malloc(void *ptr, unsigned int *size, size_t min_size, int zero_realloc)
Definition: mem_internal.h:27