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569f6effa8
Replace av_realloc with regular realloc, as there's no aligned_realloc and pointers are not compatible with regular free.
82 lines
2.2 KiB
C++
82 lines
2.2 KiB
C++
/*
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* default memory allocator for libavutil
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* Copyright (c) 2002 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* default memory allocator for libavutil
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*/
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#define _XOPEN_SOURCE 600
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#include <limits.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include "Common/MemoryUtil.h"
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#include "compat.h"
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#include "intreadwrite.h"
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#include "mem.h"
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/**
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* Multiply two size_t values checking for overflow.
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* @return 0 if success, AVERROR(EINVAL) if overflow.
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*/
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static inline int av_size_mult(size_t a, size_t b, size_t *r) {
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size_t t = a * b;
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/* Hack inspired from glibc: only try the division if nelem and elsize
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* are both greater than sqrt(SIZE_MAX). */
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if ((a | b) >= ((size_t)1 << (sizeof(size_t) * 4)) && a && t / a != b)
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return AVERROR(EINVAL);
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*r = t;
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return 0;
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}
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void *av_malloc(size_t size) {
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void *ptr = NULL;
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// Some code requires av malloc to have an alignment of 32 at least. See #20155
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ptr = AllocateAlignedMemory(size, 32);
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if (!ptr && !size) {
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// Compensate for platforms that don't allow zero-size allocations (not sure if this is actually an issue)
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return av_malloc(1);
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}
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return ptr;
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}
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void av_free(void *ptr) {
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FreeAlignedMemory(ptr);
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}
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void av_freep(void *arg) {
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void *val;
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memcpy(&val, arg, sizeof(val));
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memset(arg, 0, sizeof(val));
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av_free(val);
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}
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void *av_mallocz(size_t size) {
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void *ptr = av_malloc(size);
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if (ptr)
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memset(ptr, 0, size);
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return ptr;
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}
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