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 "thr_uberdata.h"
31
32/*
33 * UNIX98
34 * pthread_rwlockattr_init: allocates the mutex attribute object and
35 * initializes it with the default values.
36 */
37int
38pthread_rwlockattr_init(pthread_rwlockattr_t *attr)
39{
40	rwlattr_t *ap;
41
42	if ((ap = lmalloc(sizeof (rwlattr_t))) == NULL)
43		return (ENOMEM);
44	ap->pshared = DEFAULT_TYPE;
45	attr->__pthread_rwlockattrp = ap;
46	return (0);
47}
48
49/*
50 * UNIX98
51 * pthread_rwlockattr_destroy: frees the rwlock attribute object and
52 * invalidates it with NULL value.
53 */
54int
55pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr)
56{
57	if (attr == NULL || attr->__pthread_rwlockattrp == NULL)
58		return (EINVAL);
59	lfree(attr->__pthread_rwlockattrp, sizeof (rwlattr_t));
60	attr->__pthread_rwlockattrp = NULL;
61	return (0);
62}
63
64/*
65 * UNIX98
66 * pthread_rwlockattr_setpshared: sets the shared attr to PRIVATE or SHARED.
67 */
68int
69pthread_rwlockattr_setpshared(pthread_rwlockattr_t *attr, int pshared)
70{
71	rwlattr_t *ap;
72
73	if (attr != NULL && (ap = attr->__pthread_rwlockattrp) != NULL &&
74	    (pshared == PTHREAD_PROCESS_PRIVATE ||
75	    pshared == PTHREAD_PROCESS_SHARED)) {
76		ap->pshared = pshared;
77		return (0);
78	}
79	return (EINVAL);
80}
81
82/*
83 * UNIX98
84 * pthread_rwlockattr_getpshared: gets the shared attr.
85 */
86int
87pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *attr, int *pshared)
88{
89	rwlattr_t *ap;
90
91	if (attr != NULL && (ap = attr->__pthread_rwlockattrp) != NULL &&
92	    pshared != NULL) {
93		*pshared = ap->pshared;
94		return (0);
95	}
96	return (EINVAL);
97}
98
99/*
100 * UNIX98
101 * pthread_rwlock_init: Initializes the rwlock object. It copies the
102 * pshared attr into type argument and calls rwlock_init().
103 */
104int
105pthread_rwlock_init(pthread_rwlock_t *_RESTRICT_KYWD rwlock,
106    const pthread_rwlockattr_t *_RESTRICT_KYWD attr)
107{
108	rwlattr_t *ap;
109	int type;
110
111	if (attr == NULL)
112		type = DEFAULT_TYPE;
113	else if ((ap = attr->__pthread_rwlockattrp) != NULL)
114		type = ap->pshared;
115	else
116		return (EINVAL);
117
118	return (rwlock_init((rwlock_t *)rwlock, type, NULL));
119}
120