1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include "lint.h"
30 #include <sys/types.h>
31 #include <sys/mman.h>
32 #include <errno.h>
33
34 /*
35 * SUSv3 - memory advisory information and alignment control
36 *
37 * The POSIX_MADV_* constants below are defined in <sys/mman.h>
38 * to have the same values as the corresponding MADV_* constants,
39 * also defined in <sys/mman.h>, so a direct call to madvise()
40 * can be made here without further ado.
41 */
42 int
posix_madvise(void * addr,size_t len,int advice)43 posix_madvise(void *addr, size_t len, int advice)
44 {
45 switch (advice) {
46 case POSIX_MADV_NORMAL:
47 case POSIX_MADV_SEQUENTIAL:
48 case POSIX_MADV_RANDOM:
49 case POSIX_MADV_WILLNEED:
50 case POSIX_MADV_DONTNEED:
51 break;
52 default:
53 return (EINVAL);
54 }
55 if (madvise(addr, len, advice) == 0)
56 return (0);
57 return (errno);
58 }
59