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 */
37 int
pthread_rwlockattr_init(pthread_rwlockattr_t * attr)38 pthread_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 */
54 int
pthread_rwlockattr_destroy(pthread_rwlockattr_t * attr)55 pthread_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 */
68 int
pthread_rwlockattr_setpshared(pthread_rwlockattr_t * attr,int pshared)69 pthread_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 */
86 int
pthread_rwlockattr_getpshared(const pthread_rwlockattr_t * attr,int * pshared)87 pthread_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 */
104 int
pthread_rwlock_init(pthread_rwlock_t * _RESTRICT_KYWD rwlock,const pthread_rwlockattr_t * _RESTRICT_KYWD attr)105 pthread_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