lib/libthr/thread/thr_rwlockattr.c

   1 /*-
   2  * Copyright (c) 1998 Alex Nash
   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  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD$
  27  */
  28
  29 #include "namespace.h"
  30 #include <errno.h>
  31 #include <stdlib.h>
  32 #include <pthread.h>
  33 #include "un-namespace.h"
  34
  35 #include "thr_private.h"
  36
  37 __weak_reference(_pthread_rwlockattr_destroy, pthread_rwlockattr_destroy);
  38 __weak_reference(_pthread_rwlockattr_getpshared, pthread_rwlockattr_getpshared);
  39 __weak_reference(_pthread_rwlockattr_init, pthread_rwlockattr_init);
  40 __weak_reference(_pthread_rwlockattr_setpshared, pthread_rwlockattr_setpshared);
  41
  42 int
  43 _pthread_rwlockattr_destroy(pthread_rwlockattr_t *rwlockattr)
  44 {
  45         pthread_rwlockattr_t prwlockattr;
  46
  47         if (rwlockattr == NULL)
  48                 return(EINVAL);
  49
  50         prwlockattr = *rwlockattr;
  51
  52         if (prwlockattr == NULL)
  53                 return(EINVAL);
  54
  55         free(prwlockattr);
  56
  57         return(0);
  58 }
  59
  60 int
  61 _pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *rwlockattr,
  62         int *pshared)
  63 {
  64         *pshared = (*rwlockattr)->pshared;
  65
  66         return(0);
  67 }
  68
  69 int
  70 _pthread_rwlockattr_init(pthread_rwlockattr_t *rwlockattr)
  71 {
  72         pthread_rwlockattr_t prwlockattr;
  73
  74         if (rwlockattr == NULL)
  75                 return(EINVAL);
  76
  77         prwlockattr = (pthread_rwlockattr_t)
  78                 malloc(sizeof(struct pthread_rwlockattr));
  79
  80         if (prwlockattr == NULL)
  81                 return(ENOMEM);
  82
  83         prwlockattr->pshared    = PTHREAD_PROCESS_PRIVATE;
  84         *rwlockattr             = prwlockattr;
  85
  86         return(0);
  87 }
  88
  89 int
  90 _pthread_rwlockattr_setpshared(pthread_rwlockattr_t *rwlockattr, int pshared)
  91 {
  92         /* Only PTHREAD_PROCESS_PRIVATE is supported. */
  93         if (pshared != PTHREAD_PROCESS_PRIVATE)
  94                 return(EINVAL);
  95
  96         (*rwlockattr)->pshared = pshared;
  97
  98         return(0);
  99 }