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  */
28 
29 #include "namespace.h"
30 #include <errno.h>
31 #include <stdlib.h>
32 #include <pthread.h>
33 #include "un-namespace.h"
34 
35 #include "thr_private.h"
36 
37 int
38 _pthread_rwlockattr_destroy(pthread_rwlockattr_t *rwlockattr)
39 {
40 	pthread_rwlockattr_t prwlockattr;
41 
42 	if (rwlockattr == NULL)
43 		return (EINVAL);
44 	prwlockattr = *rwlockattr;
45 	if (prwlockattr == NULL)
46 		return (EINVAL);
47 	__free(prwlockattr);
48 	return (0);
49 }
50 
51 int
52 _pthread_rwlockattr_getpshared(
53 	const pthread_rwlockattr_t * __restrict rwlockattr,
54 	int * __restrict pshared)
55 {
56 	*pshared = (*rwlockattr)->pshared;
57 	return (0);
58 }
59 
60 int
61 _pthread_rwlockattr_init(pthread_rwlockattr_t *rwlockattr)
62 {
63 	pthread_rwlockattr_t prwlockattr;
64 
65 	if (rwlockattr == NULL)
66 		return (EINVAL);
67 
68 	prwlockattr = __malloc(sizeof(struct pthread_rwlockattr));
69 	if (prwlockattr == NULL)
70 		return (ENOMEM);
71 
72 	prwlockattr->pshared = PTHREAD_PROCESS_PRIVATE;
73 	*rwlockattr = prwlockattr;
74 	return (0);
75 }
76 
77 int
78 _pthread_rwlockattr_setpshared(pthread_rwlockattr_t *rwlockattr, int pshared)
79 {
80 	/* Only PTHREAD_PROCESS_PRIVATE is supported. */
81 	if (pshared != PTHREAD_PROCESS_PRIVATE)
82 		return (EINVAL);
83 	(*rwlockattr)->pshared = pshared;
84 	return (0);
85 }
86 
87 __strong_reference(_pthread_rwlockattr_destroy, pthread_rwlockattr_destroy);
88 __strong_reference(_pthread_rwlockattr_getpshared, pthread_rwlockattr_getpshared);
89 __strong_reference(_pthread_rwlockattr_init, pthread_rwlockattr_init);
90 __strong_reference(_pthread_rwlockattr_setpshared, pthread_rwlockattr_setpshared);
91