mirror of
git://sourceware.org/git/newlib-cygwin.git
synced 2025-01-19 04:49:25 +08:00
0f785536f3
The original implementation had multiple issues: - Only worked when posix_memalign was available (Linux, RTEMS). - Violated C11 link namespace rules by calling posix_memalign. - Failed to set errno on error. These can be fixed by essentially using the same implementation for aligned_alloc as for memalign, i.e. simply calling _memalign_r (which is always available and a "more reserved name" although technically still not in the reserved link namespace, at least code written in c cannot define a colliding symbol, newlib has plenty such namespace issues so this is fine). It is not clear what the right policy is when MALLOC_PROVIDED is set, currently that does not cover aligned_alloc so it is kept that way. Tested on aarch64-none-elf
37 lines
1.6 KiB
C
37 lines
1.6 KiB
C
/* C11 aligned_alloc
|
|
Copyright (c) 2020 Arm Ltd. All rights reserved.
|
|
|
|
SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
1. Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
2. Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
3. The name of the company may not be used to endorse or promote
|
|
products derived from this software without specific prior written
|
|
permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
|
|
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
|
|
|
|
#include <reent.h>
|
|
#include <stdlib.h>
|
|
|
|
void *
|
|
aligned_alloc (size_t align, size_t size)
|
|
{
|
|
return _memalign_r (_REENT, align, size);
|
|
}
|