1 /*
2  * Copyright (c) 1997 John Birrell <jb@cimlogic.com.au>.
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  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *	This product includes software developed by John Birrell.
16  * 4. Neither the name of the author nor the names of any co-contributors
17  *    may be used to endorse or promote products derived from this software
18  *    without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  *
32  * $DragonFly: src/lib/libthread_xu/thread/thr_condattr.c,v 1.6 2006/04/06 13:03:09 davidxu Exp $
33  */
34 
35 #include "namespace.h"
36 #include <errno.h>
37 #include <stdlib.h>
38 #include <string.h>
39 #include <pthread.h>
40 #include "un-namespace.h"
41 
42 #include "thr_private.h"
43 
44 /* Default condition variable attributes. */
45 struct pthread_cond_attr _pthread_condattr_default = {
46 	.c_pshared = PTHREAD_PROCESS_PRIVATE,
47 	.c_clockid = CLOCK_REALTIME
48 };
49 
50 int
51 _pthread_condattr_init(pthread_condattr_t *attr)
52 {
53 	pthread_condattr_t pattr;
54 	int ret;
55 
56 	if ((pattr = (pthread_condattr_t)
57 	    malloc(sizeof(struct pthread_cond_attr))) == NULL) {
58 		ret = ENOMEM;
59 	} else {
60 		memcpy(pattr, &_pthread_condattr_default,
61 		    sizeof(struct pthread_cond_attr));
62 		*attr = pattr;
63 		ret = 0;
64 	}
65 	return (ret);
66 }
67 
68 int
69 _pthread_condattr_destroy(pthread_condattr_t *attr)
70 {
71 	int	ret;
72 
73 	if (attr == NULL || *attr == NULL) {
74 		ret = EINVAL;
75 	} else {
76 		free(*attr);
77 		*attr = NULL;
78 		ret = 0;
79 	}
80 	return(ret);
81 }
82 
83 int
84 _pthread_condattr_getclock(const pthread_condattr_t *attr,
85        clockid_t *clock_id)
86 {
87 	if (attr == NULL || *attr == NULL)
88 		return (EINVAL);
89 	*clock_id = (*attr)->c_clockid;
90 	return (0);
91 }
92 
93 int
94 _pthread_condattr_setclock(pthread_condattr_t *attr,
95        clockid_t clock_id)
96 {
97 	if (attr == NULL || *attr == NULL)
98 		return (EINVAL);
99 	if (clock_id != CLOCK_REALTIME ||
100 	    clock_id != CLOCK_MONOTONIC)
101 		return (EINVAL);
102 	(*attr)->c_clockid = clock_id;
103 	return (0);
104 }
105 
106 int
107 _pthread_condattr_getpshared(const pthread_condattr_t *attr,
108 	int *pshared)
109 {
110 	if (attr == NULL || *attr == NULL)
111 		return (EINVAL);
112 
113 	pshared = PTHREAD_PROCESS_PRIVATE;
114 	return (0);
115 }
116 
117 int
118 _pthread_condattr_setpshared(pthread_condattr_t *attr, int pshared)
119 {
120 	if (attr == NULL || *attr == NULL)
121 		return (EINVAL);
122 
123 	if  (pshared != PTHREAD_PROCESS_PRIVATE)
124 		return (EINVAL);
125 	return (0);
126 }
127 
128 __strong_reference(_pthread_condattr_init, pthread_condattr_init);
129 __strong_reference(_pthread_condattr_destroy, pthread_condattr_destroy);
130 __strong_reference(_pthread_condattr_getclock, pthread_condattr_getclock);
131 __strong_reference(_pthread_condattr_setclock, pthread_condattr_setclock);
132 __strong_reference(_pthread_condattr_getpshared, pthread_condattr_getpshared);
133 __strong_reference(_pthread_condattr_setpshared, pthread_condattr_setpshared);
134 
135