lib/libthread_xu/thread/thr_condattr.c

   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