mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-04 09:11:33 +02:00
![Steve Lhomme](/assets/img/avatar_default.png)
On Windows if you allocate aligned memory you need to free it with an aligned version of free. This is similar to the old vlc_memalign() + vlc_free() Signed-off-by: Thomas Guillem <thomas@gllm.fr>
68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
/*****************************************************************************
|
|
* aligned_alloc.c: C11 aligned_alloc() replacement
|
|
*****************************************************************************
|
|
* Copyright © 2012, 2017 Rémi Denis-Courmont
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation; either version 2.1 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this program; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
|
|
*****************************************************************************/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include <assert.h>
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#if !defined (HAVE_POSIX_MEMALIGN)
|
|
# include <malloc.h>
|
|
#endif
|
|
|
|
void *aligned_alloc(size_t align, size_t size)
|
|
{
|
|
/* align must be a power of 2 */
|
|
/* size must be a multiple of align */
|
|
if ((align & (align - 1)) || (size & (align - 1)))
|
|
{
|
|
errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
#ifdef HAVE_POSIX_MEMALIGN
|
|
if (align < sizeof (void *)) /* POSIX does not allow small alignment */
|
|
align = sizeof (void *);
|
|
|
|
void *ptr;
|
|
int err = posix_memalign(&ptr, align, size);
|
|
if (err)
|
|
{
|
|
errno = err;
|
|
ptr = NULL;
|
|
}
|
|
return ptr;
|
|
|
|
#elif defined(HAVE_MEMALIGN)
|
|
return memalign(align, size);
|
|
#elif defined (_WIN32) && defined(__MINGW32__)
|
|
return __mingw_aligned_malloc(size, align);
|
|
#elif defined (_WIN32) && defined(_MSC_VER)
|
|
return _aligned_malloc(size, align);
|
|
#else
|
|
#warning unsupported aligned allocation!
|
|
if (size > 0)
|
|
errno = ENOMEM;
|
|
return NULL;
|
|
#endif
|
|
}
|