mirror of
https://https.git.savannah.gnu.org/git/gnulib.git
synced 2026-04-28 22:53:36 +00:00
54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
/* An aligned_alloc() function that works around platform bugs.
|
|
Copyright (C) 2020-2026 Free Software Foundation, Inc.
|
|
|
|
This file 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 file 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, see <https://www.gnu.org/licenses/>. */
|
|
|
|
#include <config.h>
|
|
|
|
/* Specification. */
|
|
#include <stdlib.h>
|
|
|
|
#include <errno.h>
|
|
|
|
void *
|
|
aligned_alloc (size_t alignment, size_t size)
|
|
#undef aligned_alloc
|
|
{
|
|
if (alignment != 0 && (alignment & (alignment - 1)) == 0)
|
|
{
|
|
/* alignment is a power of 2. */
|
|
if (size == 0)
|
|
size = 1;
|
|
if (alignment >= sizeof (void *))
|
|
{
|
|
/* Make size a multiple of alignment. */
|
|
size = (size + (alignment - 1)) & -alignment;
|
|
if (size > 0)
|
|
return aligned_alloc (alignment, size);
|
|
else
|
|
{
|
|
errno = ENOMEM;
|
|
return NULL;
|
|
}
|
|
}
|
|
else
|
|
return malloc (size);
|
|
}
|
|
else
|
|
{
|
|
errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
}
|