xref: /freebsd/lib/libthr/thread/thr_mutexattr.c (revision 195ebc7e9e4b129de810833791a19dfb4349d6a9)
1 /*
2  * Copyright (c) 1996 Jeffrey Hsu <hsu@freebsd.org>.
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. Neither the name of the author nor the names of any co-contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * $FreeBSD$
30  */
31 
32 /*
33  * Copyright (c) 1997 John Birrell <jb@cimlogic.com.au>.
34  * All rights reserved.
35  *
36  * Redistribution and use in source and binary forms, with or without
37  * modification, are permitted provided that the following conditions
38  * are met:
39  * 1. Redistributions of source code must retain the above copyright
40  *    notice, this list of conditions and the following disclaimer.
41  * 2. Redistributions in binary form must reproduce the above copyright
42  *    notice, this list of conditions and the following disclaimer in the
43  *    documentation and/or other materials provided with the distribution.
44  * 3. Neither the name of the author nor the names of any co-contributors
45  *    may be used to endorse or promote products derived from this software
46  *    without specific prior written permission.
47  *
48  * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58  * SUCH DAMAGE.
59  *
60  */
61 
62 #include "namespace.h"
63 #include <string.h>
64 #include <stdlib.h>
65 #include <errno.h>
66 #include <pthread.h>
67 #include <pthread_np.h>
68 #include "un-namespace.h"
69 
70 #include "thr_private.h"
71 
72 __weak_reference(_pthread_mutexattr_init, pthread_mutexattr_init);
73 __weak_reference(_pthread_mutexattr_setkind_np, pthread_mutexattr_setkind_np);
74 __weak_reference(_pthread_mutexattr_getkind_np, pthread_mutexattr_getkind_np);
75 __weak_reference(_pthread_mutexattr_gettype, pthread_mutexattr_gettype);
76 __weak_reference(_pthread_mutexattr_settype, pthread_mutexattr_settype);
77 __weak_reference(_pthread_mutexattr_destroy, pthread_mutexattr_destroy);
78 __weak_reference(_pthread_mutexattr_getpshared, pthread_mutexattr_getpshared);
79 __weak_reference(_pthread_mutexattr_setpshared, pthread_mutexattr_setpshared);
80 __weak_reference(_pthread_mutexattr_getprotocol, pthread_mutexattr_getprotocol);
81 __weak_reference(_pthread_mutexattr_setprotocol, pthread_mutexattr_setprotocol);
82 __weak_reference(_pthread_mutexattr_getprioceiling, pthread_mutexattr_getprioceiling);
83 __weak_reference(_pthread_mutexattr_setprioceiling, pthread_mutexattr_setprioceiling);
84 
85 int
86 _pthread_mutexattr_init(pthread_mutexattr_t *attr)
87 {
88 	int ret;
89 	pthread_mutexattr_t pattr;
90 
91 	if ((pattr = (pthread_mutexattr_t)
92 	    malloc(sizeof(struct pthread_mutex_attr))) == NULL) {
93 		ret = ENOMEM;
94 	} else {
95 		memcpy(pattr, &_pthread_mutexattr_default,
96 		    sizeof(struct pthread_mutex_attr));
97 		*attr = pattr;
98 		ret = 0;
99 	}
100 	return (ret);
101 }
102 
103 int
104 _pthread_mutexattr_setkind_np(pthread_mutexattr_t *attr, int kind)
105 {
106 	int	ret;
107 	if (attr == NULL || *attr == NULL) {
108 		errno = EINVAL;
109 		ret = -1;
110 	} else {
111 		(*attr)->m_type = kind;
112 		ret = 0;
113 	}
114 	return(ret);
115 }
116 
117 int
118 _pthread_mutexattr_getkind_np(pthread_mutexattr_t attr)
119 {
120 	int	ret;
121 	if (attr == NULL) {
122 		errno = EINVAL;
123 		ret = -1;
124 	} else {
125 		ret = attr->m_type;
126 	}
127 	return(ret);
128 }
129 
130 int
131 _pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type)
132 {
133 	int	ret;
134 	if (attr == NULL || *attr == NULL || type >= PTHREAD_MUTEX_TYPE_MAX) {
135 		ret = EINVAL;
136 	} else {
137 		(*attr)->m_type = type;
138 		ret = 0;
139 	}
140 	return(ret);
141 }
142 
143 int
144 _pthread_mutexattr_gettype(pthread_mutexattr_t *attr, int *type)
145 {
146 	int	ret;
147 
148 	if (attr == NULL || *attr == NULL || (*attr)->m_type >=
149 	    PTHREAD_MUTEX_TYPE_MAX) {
150 		ret = EINVAL;
151 	} else {
152 		*type = (*attr)->m_type;
153 		ret = 0;
154 	}
155 	return ret;
156 }
157 
158 int
159 _pthread_mutexattr_destroy(pthread_mutexattr_t *attr)
160 {
161 	int	ret;
162 	if (attr == NULL || *attr == NULL) {
163 		ret = EINVAL;
164 	} else {
165 		free(*attr);
166 		*attr = NULL;
167 		ret = 0;
168 	}
169 	return(ret);
170 }
171 
172 int
173 _pthread_mutexattr_getpshared(const pthread_mutexattr_t *attr,
174 	int *pshared)
175 {
176 
177 	if (attr == NULL || *attr == NULL)
178 		return (EINVAL);
179 
180 	*pshared = PTHREAD_PROCESS_PRIVATE;
181 	return (0);
182 }
183 
184 int
185 _pthread_mutexattr_setpshared(pthread_mutexattr_t *attr, int pshared)
186 {
187 
188 	if (attr == NULL || *attr == NULL)
189 		return (EINVAL);
190 
191 	/* Only PTHREAD_PROCESS_PRIVATE is supported. */
192 	if (pshared != PTHREAD_PROCESS_PRIVATE)
193 		return (EINVAL);
194 
195 	return (0);
196 }
197 
198 int
199 _pthread_mutexattr_getprotocol(pthread_mutexattr_t *mattr, int *protocol)
200 {
201 	int ret = 0;
202 
203 	if ((mattr == NULL) || (*mattr == NULL))
204 		ret = EINVAL;
205 	else
206 		*protocol = (*mattr)->m_protocol;
207 
208 	return(ret);
209 }
210 
211 int
212 _pthread_mutexattr_setprotocol(pthread_mutexattr_t *mattr, int protocol)
213 {
214 	int ret = 0;
215 
216 	if ((mattr == NULL) || (*mattr == NULL) ||
217 	    (protocol < PTHREAD_PRIO_NONE) || (protocol > PTHREAD_PRIO_PROTECT))
218 		ret = EINVAL;
219 	else {
220 		(*mattr)->m_protocol = protocol;
221 		(*mattr)->m_ceiling = THR_MAX_RR_PRIORITY;
222 	}
223 	return(ret);
224 }
225 
226 int
227 _pthread_mutexattr_getprioceiling(pthread_mutexattr_t *mattr, int *prioceiling)
228 {
229 	int ret = 0;
230 
231 	if ((mattr == NULL) || (*mattr == NULL))
232 		ret = EINVAL;
233 	else if ((*mattr)->m_protocol != PTHREAD_PRIO_PROTECT)
234 		ret = EINVAL;
235 	else
236 		*prioceiling = (*mattr)->m_ceiling;
237 
238 	return(ret);
239 }
240 
241 int
242 _pthread_mutexattr_setprioceiling(pthread_mutexattr_t *mattr, int prioceiling)
243 {
244 	int ret = 0;
245 
246 	if ((mattr == NULL) || (*mattr == NULL))
247 		ret = EINVAL;
248 	else if ((*mattr)->m_protocol != PTHREAD_PRIO_PROTECT)
249 		ret = EINVAL;
250 	else
251 		(*mattr)->m_ceiling = prioceiling;
252 
253 	return(ret);
254 }
255 
256