lib/libthread_xu/thread/thr_mutexattr.c

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