blob: 44be459259bd1908e3fb5e436e8e1f209b86f4dc (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include "lint.h"
#include "thr_uberdata.h"
/*
* UNIX98
* pthread_rwlockattr_init: allocates the mutex attribute object and
* initializes it with the default values.
*/
int
pthread_rwlockattr_init(pthread_rwlockattr_t *attr)
{
rwlattr_t *ap;
if ((ap = lmalloc(sizeof (rwlattr_t))) == NULL)
return (ENOMEM);
ap->pshared = PTHREAD_PROCESS_PRIVATE;
attr->__pthread_rwlockattrp = ap;
return (0);
}
/*
* UNIX98
* pthread_rwlockattr_destroy: frees the rwlock attribute object and
* invalidates it with NULL value.
*/
int
pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr)
{
if (attr == NULL || attr->__pthread_rwlockattrp == NULL)
return (EINVAL);
lfree(attr->__pthread_rwlockattrp, sizeof (rwlattr_t));
attr->__pthread_rwlockattrp = NULL;
return (0);
}
/*
* UNIX98
* pthread_rwlockattr_setpshared: sets the shared attr to PRIVATE or SHARED.
*/
int
pthread_rwlockattr_setpshared(pthread_rwlockattr_t *attr, int pshared)
{
rwlattr_t *ap;
if (attr != NULL && (ap = attr->__pthread_rwlockattrp) != NULL &&
(pshared == PTHREAD_PROCESS_PRIVATE ||
pshared == PTHREAD_PROCESS_SHARED)) {
ap->pshared = pshared;
return (0);
}
return (EINVAL);
}
/*
* UNIX98
* pthread_rwlockattr_getpshared: gets the shared attr.
*/
int
pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *attr, int *pshared)
{
rwlattr_t *ap;
if (attr != NULL && (ap = attr->__pthread_rwlockattrp) != NULL &&
pshared != NULL) {
*pshared = ap->pshared;
return (0);
}
return (EINVAL);
}
/*
* UNIX98
* pthread_rwlock_init: Initializes the rwlock object. It copies the
* pshared attr into type argument and calls rwlock_init().
*/
int
pthread_rwlock_init(pthread_rwlock_t *_RESTRICT_KYWD rwlock,
const pthread_rwlockattr_t *_RESTRICT_KYWD attr)
{
rwlattr_t *ap;
int type;
if (attr == NULL)
type = PTHREAD_PROCESS_PRIVATE;
else if ((ap = attr->__pthread_rwlockattrp) != NULL)
type = ap->pshared;
else
return (EINVAL);
return (rwlock_init((rwlock_t *)rwlock, type, NULL));
}
|
