1 /*-
2  * Copyright (c) 1998 Alex Nash
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  * $FreeBSD: src/lib/libpthread/thread/thr_rwlockattr.c,v 1.8 2002/09/16 08:45:35 mini Exp $
27  * $DragonFly: src/lib/libthread_xu/thread/thr_rwlockattr.c,v 1.3 2006/04/06 13:03:09 davidxu Exp $
28  */
29 
30 #include "namespace.h"
31 #include <errno.h>
32 #include <stdlib.h>
33 
34 #include <pthread.h>
35 #include "un-namespace.h"
36 
37 #include "thr_private.h"
38 
39 int
40 _pthread_rwlockattr_destroy(pthread_rwlockattr_t *rwlockattr)
41 {
42 	pthread_rwlockattr_t prwlockattr;
43 
44 	if (rwlockattr == NULL)
45 		return(EINVAL);
46 
47 	prwlockattr = *rwlockattr;
48 
49 	if (prwlockattr == NULL)
50 		return(EINVAL);
51 
52 	free(prwlockattr);
53 
54 	return(0);
55 }
56 
57 int
58 _pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *rwlockattr,
59 	int *pshared)
60 {
61 	*pshared = (*rwlockattr)->pshared;
62 
63 	return(0);
64 }
65 
66 int
67 _pthread_rwlockattr_init(pthread_rwlockattr_t *rwlockattr)
68 {
69 	pthread_rwlockattr_t prwlockattr;
70 
71 	if (rwlockattr == NULL)
72 		return(EINVAL);
73 
74 	prwlockattr = (pthread_rwlockattr_t)
75 		malloc(sizeof(struct pthread_rwlockattr));
76 
77 	if (prwlockattr == NULL)
78 		return(ENOMEM);
79 
80 	prwlockattr->pshared 	= PTHREAD_PROCESS_PRIVATE;
81 	*rwlockattr		= prwlockattr;
82 
83 	return(0);
84 }
85 
86 int
87 _pthread_rwlockattr_setpshared(pthread_rwlockattr_t *rwlockattr, int pshared)
88 {
89 	/* Only PTHREAD_PROCESS_PRIVATE is supported. */
90 	if (pshared != PTHREAD_PROCESS_PRIVATE)
91 		return(EINVAL);
92 
93 	(*rwlockattr)->pshared = pshared;
94 
95 	return(0);
96 }
97 
98 __strong_reference(_pthread_rwlockattr_destroy, pthread_rwlockattr_destroy);
99 __strong_reference(_pthread_rwlockattr_getpshared, pthread_rwlockattr_getpshared);
100 __strong_reference(_pthread_rwlockattr_init, pthread_rwlockattr_init);
101 __strong_reference(_pthread_rwlockattr_setpshared, pthread_rwlockattr_setpshared);
102 
103