1 /* posix_memalign for uClibc
2 *
3 * Copyright (C) 1996-2002, 2003, 2004, 2005 Free Software Foundation, Inc.
4 * Copyright (C) 2005 by Erik Andersen <andersen@uclibc.org>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU Library General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
14 * for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this program; see the file COPYING.LIB. If not, see
18 * <http://www.gnu.org/licenses/>.
19 */
20
21 #include <stdlib.h>
22 #include <malloc.h>
23 #include <sys/types.h>
24 #include <errno.h>
25 #include <sys/param.h>
26
posix_memalign(void ** memptr,size_t alignment,size_t size)27 int posix_memalign(void **memptr, size_t alignment, size_t size)
28 {
29 /* Make sure alignment is correct. */
30 if (alignment % sizeof(void *) != 0)
31 /* Skip these checks because the memalign() func does them for us
32 || !powerof2(alignment / sizeof(void *)) != 0
33 || alignment == 0
34 */
35 return EINVAL;
36 void *mem = memalign(alignment, size);
37 if (mem != NULL) {
38 *memptr = mem;
39 return 0;
40 } else
41 return ENOMEM;
42 }
43