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  * $DragonFly: src/lib/libthread_xu/thread/thr_barrierattr.c,v 1.3 2006/04/06 13:03:09 davidxu Exp $
  30  */
  31
  32 #include "namespace.h"
  33 #include <errno.h>
  34 #include <stdlib.h>
  35 #include <pthread.h>
  36 #include "un-namespace.h"
  37
  38 #include "thr_private.h"
  39
  40 int
  41 _pthread_barrierattr_destroy(pthread_barrierattr_t *attr)
  42 {
  43
  44         if (attr == NULL || *attr == NULL)
  45                 return (EINVAL);
  46
  47         free(*attr);
  48         return (0);
  49 }
  50
  51 int
  52 _pthread_barrierattr_getpshared(const pthread_barrierattr_t *attr,
  53         int *pshared)
  54 {
  55
  56         if (attr == NULL || *attr == NULL)
  57                 return (EINVAL);
  58
  59         *pshared = (*attr)->pshared;
  60         return (0);
  61 }
  62
  63 int
  64 _pthread_barrierattr_init(pthread_barrierattr_t *attr)
  65 {
  66
  67         if (attr == NULL)
  68                 return (EINVAL);
  69
  70         if ((*attr = malloc(sizeof(struct pthread_barrierattr))) == NULL)
  71                 return (ENOMEM);
  72
  73         (*attr)->pshared = PTHREAD_PROCESS_PRIVATE;
  74         return (0);
  75 }
  76
  77 int
  78 _pthread_barrierattr_setpshared(pthread_barrierattr_t *attr, int pshared)
  79 {
  80
  81         if (attr == NULL || *attr == NULL)
  82                 return (EINVAL);
  83
  84         /* Only PTHREAD_PROCESS_PRIVATE is supported. */
  85         if (pshared != PTHREAD_PROCESS_PRIVATE)
  86                 return (EINVAL);
  87
  88         (*attr)->pshared = pshared;
  89         return (0);
  90 }
  91
  92 __strong_reference(_pthread_barrierattr_destroy, pthread_barrierattr_destroy);
  93 __strong_reference(_pthread_barrierattr_init, pthread_barrierattr_init);
  94 __strong_reference(_pthread_barrierattr_setpshared,
  95         pthread_barrierattr_setpshared);
  96 __strong_reference(_pthread_barrierattr_getpshared,
  97         pthread_barrierattr_getpshared);
  98