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 #include "lint.h"
28 #include <sys/types.h>
29 #include <sys/mman.h>
30 #include <errno.h>
31
32 /*
33 * SUSv3 - memory advisory information and alignment control
34 *
35 * The POSIX_MADV_* constants below are defined in <sys/mman.h>
36 * to have the same values as the corresponding MADV_* constants,
37 * also defined in <sys/mman.h>, so a direct call to madvise()
38 * can be made here without further ado.
39 */
40 int
posix_madvise(void * addr,size_t len,int advice)41 posix_madvise(void *addr, size_t len, int advice)
42 {
43 switch (advice) {
44 case POSIX_MADV_NORMAL:
45 case POSIX_MADV_SEQUENTIAL:
46 case POSIX_MADV_RANDOM:
47 case POSIX_MADV_WILLNEED:
48 case POSIX_MADV_DONTNEED:
49 break;
50 default:
51 return (EINVAL);
52 }
53 if (madvise(addr, len, advice) == 0)
54 return (0);
55 return (errno);
56 }
57