lib/libthread_xu/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: src/lib/libpthread/thread/thr_rwlockattr.c,v 1.8 2002/09/16 08:45:35 mini Exp $
  27  * $DragonFly: src/lib/libthread_xu/thread/thr_rwlockattr.c,v 1.3 2006/04/06 13:03:09 davidxu Exp $
  28  */
  29
  30 #include "namespace.h"
  31 #include <errno.h>
  32 #include <stdlib.h>
  33
  34 #include <pthread.h>
  35 #include "un-namespace.h"
  36
  37 #include "thr_private.h"
  38
  39 int
  40 _pthread_rwlockattr_destroy(pthread_rwlockattr_t *rwlockattr)
  41 {
  42         pthread_rwlockattr_t prwlockattr;
  43
  44         if (rwlockattr == NULL)
  45                 return(EINVAL);
  46
  47         prwlockattr = *rwlockattr;
  48
  49         if (prwlockattr == NULL)
  50                 return(EINVAL);
  51
  52         free(prwlockattr);
  53
  54         return(0);
  55 }
  56
  57 int
  58 _pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *rwlockattr,
  59         int *pshared)
  60 {
  61         *pshared = (*rwlockattr)->pshared;
  62
  63         return(0);
  64 }
  65
  66 int
  67 _pthread_rwlockattr_init(pthread_rwlockattr_t *rwlockattr)
  68 {
  69         pthread_rwlockattr_t prwlockattr;
  70
  71         if (rwlockattr == NULL)
  72                 return(EINVAL);
  73
  74         prwlockattr = (pthread_rwlockattr_t)
  75                 malloc(sizeof(struct pthread_rwlockattr));
  76
  77         if (prwlockattr == NULL)
  78                 return(ENOMEM);
  79
  80         prwlockattr->pshared    = PTHREAD_PROCESS_PRIVATE;
  81         *rwlockattr             = prwlockattr;
  82
  83         return(0);
  84 }
  85
  86 int
  87 _pthread_rwlockattr_setpshared(pthread_rwlockattr_t *rwlockattr, int pshared)
  88 {
  89         /* Only PTHREAD_PROCESS_PRIVATE is supported. */
  90         if (pshared != PTHREAD_PROCESS_PRIVATE)
  91                 return(EINVAL);
  92
  93         (*rwlockattr)->pshared = pshared;
  94
  95         return(0);
  96 }
  97
  98 __strong_reference(_pthread_rwlockattr_destroy, pthread_rwlockattr_destroy);
  99 __strong_reference(_pthread_rwlockattr_getpshared, pthread_rwlockattr_getpshared);
 100 __strong_reference(_pthread_rwlockattr_init, pthread_rwlockattr_init);
 101 __strong_reference(_pthread_rwlockattr_setpshared, pthread_rwlockattr_setpshared);
 102