1 /* 2 * Copyright (c) 1996 Jeffrey Hsu <hsu@freebsd.org>. 3 * Copyright (c) 1997 John Birrell <jb@cimlogic.com.au>. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by John Birrell. 17 * 4. Neither the name of the author nor the names of any co-contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $DragonFly: src/lib/libthread_xu/thread/thr_mutexattr.c,v 1.5 2006/04/06 13:03:09 davidxu Exp $ 34 */ 35 36 #include "namespace.h" 37 #include <string.h> 38 #include <stdlib.h> 39 #include <errno.h> 40 #include <pthread.h> 41 #include <pthread_np.h> 42 #include "un-namespace.h" 43 44 #include "thr_private.h" 45 46 /* Default mutex attributes. */ 47 struct pthread_mutex_attr _pthread_mutexattr_default = { 48 .m_type = PTHREAD_MUTEX_DEFAULT, 49 .m_protocol = PTHREAD_PRIO_NONE, 50 .m_ceiling = 0, 51 .m_flags = 0 52 }; 53 54 int 55 _pthread_mutexattr_init(pthread_mutexattr_t *attr) 56 { 57 int ret; 58 pthread_mutexattr_t pattr; 59 60 if ((pattr = (pthread_mutexattr_t) 61 malloc(sizeof(struct pthread_mutex_attr))) == NULL) { 62 ret = ENOMEM; 63 } else { 64 memcpy(pattr, &_pthread_mutexattr_default, 65 sizeof(struct pthread_mutex_attr)); 66 *attr = pattr; 67 ret = 0; 68 } 69 return (ret); 70 } 71 72 int 73 _pthread_mutexattr_setkind_np(pthread_mutexattr_t *attr, int kind) 74 { 75 int ret; 76 if (attr == NULL || *attr == NULL) { 77 errno = EINVAL; 78 ret = -1; 79 } else { 80 (*attr)->m_type = kind; 81 ret = 0; 82 } 83 return(ret); 84 } 85 86 int 87 _pthread_mutexattr_getkind_np(pthread_mutexattr_t attr) 88 { 89 int ret; 90 if (attr == NULL) { 91 errno = EINVAL; 92 ret = -1; 93 } else { 94 ret = attr->m_type; 95 } 96 return(ret); 97 } 98 99 int 100 _pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type) 101 { 102 int ret; 103 if (attr == NULL || *attr == NULL || type >= MUTEX_TYPE_MAX) { 104 errno = EINVAL; 105 ret = -1; 106 } else { 107 (*attr)->m_type = type; 108 ret = 0; 109 } 110 return(ret); 111 } 112 113 int 114 _pthread_mutexattr_gettype(pthread_mutexattr_t *attr, int *type) 115 { 116 int ret; 117 118 if (attr == NULL || *attr == NULL || (*attr)->m_type >= 119 MUTEX_TYPE_MAX) { 120 ret = EINVAL; 121 } else { 122 *type = (*attr)->m_type; 123 ret = 0; 124 } 125 return ret; 126 } 127 128 int 129 _pthread_mutexattr_destroy(pthread_mutexattr_t *attr) 130 { 131 int ret; 132 if (attr == NULL || *attr == NULL) { 133 ret = EINVAL; 134 } else { 135 free(*attr); 136 *attr = NULL; 137 ret = 0; 138 } 139 return(ret); 140 } 141 142 int 143 _pthread_mutexattr_getpshared(const pthread_mutexattr_t *attr, 144 int *pshared) 145 { 146 147 if (attr == NULL || *attr == NULL) 148 return (EINVAL); 149 150 *pshared = PTHREAD_PROCESS_PRIVATE; 151 return (0); 152 } 153 154 int 155 _pthread_mutexattr_setpshared(pthread_mutexattr_t *attr, int pshared) 156 { 157 158 if (attr == NULL || *attr == NULL) 159 return (EINVAL); 160 161 /* Only PTHREAD_PROCESS_PRIVATE is supported. */ 162 if (pshared != PTHREAD_PROCESS_PRIVATE) 163 return (EINVAL); 164 165 return (0); 166 } 167 168 __strong_reference(_pthread_mutexattr_init, pthread_mutexattr_init); 169 __strong_reference(_pthread_mutexattr_setkind_np, pthread_mutexattr_setkind_np); 170 __strong_reference(_pthread_mutexattr_getkind_np, pthread_mutexattr_getkind_np); 171 __strong_reference(_pthread_mutexattr_gettype, pthread_mutexattr_gettype); 172 __strong_reference(_pthread_mutexattr_settype, pthread_mutexattr_settype); 173 __strong_reference(_pthread_mutexattr_destroy, pthread_mutexattr_destroy); 174