lib/libthread_xu/thread/thr_barrierattr.c

   1 /*
   2  * Copyright (c) 2003 David Xu <davidxu@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(s), this list of conditions and the following disclaimer as
  10  *    the first lines of this file unmodified other than the possible
  11  *    addition of one or more copyright notices.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice(s), this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
  17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  18  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  19  * DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
  20  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  22  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  23  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  26  * DAMAGE.
  27  *
  28  * $FreeBSD: src/lib/libpthread/thread/thr_barrierattr.c,v 1.1 2003/09/04 14:06:43 davidxu Exp $
  29  */
  30
  31 #include "namespace.h"
  32 #include <errno.h>
  33 #include <stdlib.h>
  34 #include <pthread.h>
  35 #include "un-namespace.h"
  36
  37 #include "thr_private.h"
  38
  39 int
  40 _pthread_barrierattr_destroy(pthread_barrierattr_t *attr)
  41 {
  42
  43         if (attr == NULL || *attr == NULL)
  44                 return (EINVAL);
  45
  46         free(*attr);
  47         return (0);
  48 }
  49
  50 int
  51 _pthread_barrierattr_getpshared(const pthread_barrierattr_t * __restrict attr,
  52     int * __restrict pshared)
  53 {
  54
  55         if (attr == NULL || *attr == NULL)
  56                 return (EINVAL);
  57
  58         *pshared = (*attr)->pshared;
  59         return (0);
  60 }
  61
  62 int
  63 _pthread_barrierattr_init(pthread_barrierattr_t *attr)
  64 {
  65
  66         if (attr == NULL)
  67                 return (EINVAL);
  68
  69         if ((*attr = malloc(sizeof(struct pthread_barrierattr))) == NULL)
  70                 return (ENOMEM);
  71
  72         (*attr)->pshared = PTHREAD_PROCESS_PRIVATE;
  73         return (0);
  74 }
  75
  76 int
  77 _pthread_barrierattr_setpshared(pthread_barrierattr_t *attr, int pshared)
  78 {
  79
  80         if (attr == NULL || *attr == NULL)
  81                 return (EINVAL);
  82
  83         /* Only PTHREAD_PROCESS_PRIVATE is supported. */
  84         if (pshared != PTHREAD_PROCESS_PRIVATE)
  85                 return (EINVAL);
  86
  87         (*attr)->pshared = pshared;
  88         return (0);
  89 }
  90
  91 __strong_reference(_pthread_barrierattr_destroy, pthread_barrierattr_destroy);
  92 __strong_reference(_pthread_barrierattr_init, pthread_barrierattr_init);
  93 __strong_reference(_pthread_barrierattr_setpshared,
  94         pthread_barrierattr_setpshared);
  95 __strong_reference(_pthread_barrierattr_getpshared,
  96         pthread_barrierattr_getpshared);