blob: 268949b200c8a1466fb502d5c8fbad3038fff495 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
/*
* Copyright (c) 2003 Gunnar Ritter
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute
* it freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*/
/* Sccsid @(#)memalign.c 1.7 (gritter) 1/22/06 */
#if defined (__FreeBSD__) || defined (__dietlibc__) || defined (_AIX) || \
defined (__NetBSD__) || defined (__OpenBSD__) || \
defined (__DragonFly__) || defined (__APPLE__)
/*
* FreeBSD malloc(3) promises to page-align the return of malloc() calls
* if size is at least a page. This serves for a poor man's memalign()
* implementation that matches our needs.
*/
#include <unistd.h>
#include <stdlib.h>
#include "memalign.h"
void *
memalign(size_t alignment, size_t size)
{
static long pagesize;
if (pagesize == 0)
pagesize = sysconf(_SC_PAGESIZE);
if (alignment != pagesize)
return NULL;
if (size < pagesize)
size = pagesize;
return malloc(size);
}
#endif /* __FreeBSD__ || __dietlibc__ || _AIX || __NetBSD__ || __OpenBSD__ ||
__DragonFly__ || __APPLE__ */
|
