1 /*	$OpenBSD: rthread_rwlockattr.c,v 1.2 2012/02/15 04:58:42 guenther Exp $ */
2 /*
3  * Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org>
4  * All Rights Reserved.
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 /*
19  * rwlock attributes
20  */
21 
22 
23 #include <stdlib.h>
24 #include <unistd.h>
25 #include <errno.h>
26 
27 #include <pthread.h>
28 
29 #include "rthread.h"
30 
31 int
32 pthread_rwlockattr_init(pthread_rwlockattr_t *attrp)
33 {
34 	pthread_rwlockattr_t attr;
35 
36 	attr = calloc(1, sizeof(*attr));
37 	if (!attr)
38 		return (errno);
39 	attr->pshared = PTHREAD_PROCESS_PRIVATE;
40 	*attrp = attr;
41 
42 	return (0);
43 }
44 
45 int
46 pthread_rwlockattr_destroy(pthread_rwlockattr_t *attrp)
47 {
48 	free(*attrp);
49 	*attrp = NULL;
50 
51 	return (0);
52 }
53 
54 int
55 pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *attrp, int *pshared)
56 {
57 	*pshared = (*attrp)->pshared;
58 
59 	return (0);
60 }
61 
62 int
63 pthread_rwlockattr_setpshared(pthread_rwlockattr_t *attrp, int pshared)
64 {
65 	/* only PTHREAD_PROCESS_PRIVATE is supported */
66 	if (pshared != PTHREAD_PROCESS_PRIVATE)
67 		return (EINVAL);
68 
69 	(*attrp)->pshared = pshared;
70 
71 	return (0);
72 }
73