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 */
42int
43posix_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