You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
2.1 KiB
68 lines
2.1 KiB
6 years ago
|
/*****************************************************************************
|
||
|
|
* 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 __ANDROID__
|
||
|
|
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
|
||
|
|
}
|