lib/libc_r/uthread/uthread_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: src/lib/libc_r/uthread/uthread_rwlockattr.c,v 1.5.2.1 2002/10/22 14:44:03 fjoe Exp $
  27  */
  28
  29 #include <errno.h>
  30 #include <stdlib.h>
  31
  32 #include <pthread.h>
  33 #include "pthread_private.h"
  34
  35 __weak_reference(_pthread_rwlockattr_destroy, pthread_rwlockattr_destroy);
  36 __weak_reference(_pthread_rwlockattr_getpshared, pthread_rwlockattr_getpshared);
  37 __weak_reference(_pthread_rwlockattr_init, pthread_rwlockattr_init);
  38 __weak_reference(_pthread_rwlockattr_setpshared, pthread_rwlockattr_setpshared);
  39
  40 int
  41 _pthread_rwlockattr_destroy(pthread_rwlockattr_t *rwlockattr)
  42 {
  43         pthread_rwlockattr_t prwlockattr;
  44
  45         if (rwlockattr == NULL)
  46                 return(EINVAL);
  47
  48         prwlockattr = *rwlockattr;
  49
  50         if (prwlockattr == NULL)
  51                 return(EINVAL);
  52
  53         free(prwlockattr);
  54
  55         return(0);
  56 }
  57
  58 int
  59 _pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *rwlockattr,
  60         int *pshared)
  61 {
  62         *pshared = (*rwlockattr)->pshared;
  63
  64         return(0);
  65 }
  66
  67 int
  68 _pthread_rwlockattr_init(pthread_rwlockattr_t *rwlockattr)
  69 {
  70         pthread_rwlockattr_t prwlockattr;
  71
  72         if (rwlockattr == NULL)
  73                 return(EINVAL);
  74
  75         prwlockattr = (pthread_rwlockattr_t)
  76                 malloc(sizeof(struct pthread_rwlockattr));
  77
  78         if (prwlockattr == NULL)
  79                 return(ENOMEM);
  80
  81         prwlockattr->pshared    = PTHREAD_PROCESS_PRIVATE;
  82         *rwlockattr             = prwlockattr;
  83
  84         return(0);
  85 }
  86
  87 int
  88 _pthread_rwlockattr_setpshared(pthread_rwlockattr_t *rwlockattr, int pshared)
  89 {
  90         /* Only PTHREAD_PROCESS_PRIVATE is supported. */
  91         if (pshared != PTHREAD_PROCESS_PRIVATE)
  92                 return(EINVAL);
  93
  94         (*rwlockattr)->pshared = pshared;
  95
  96         return(0);
  97 }
  98