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  */
  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 int
  38 _pthread_rwlockattr_destroy(pthread_rwlockattr_t *rwlockattr)
  39 {
  40         pthread_rwlockattr_t prwlockattr;
  41
  42         if (rwlockattr == NULL)
  43                 return (EINVAL);
  44         prwlockattr = *rwlockattr;
  45         if (prwlockattr == NULL)
  46                 return (EINVAL);
  47         free(prwlockattr);
  48         return (0);
  49 }
  50
  51 int
  52 _pthread_rwlockattr_getpshared(const pthread_rwlockattr_t * __restrict rwlockattr,
  53     int * __restrict pshared)
  54 {
  55         *pshared = (*rwlockattr)->pshared;
  56         return (0);
  57 }
  58
  59 int
  60 _pthread_rwlockattr_init(pthread_rwlockattr_t *rwlockattr)
  61 {
  62         pthread_rwlockattr_t prwlockattr;
  63
  64         if (rwlockattr == NULL)
  65                 return (EINVAL);
  66
  67         prwlockattr = malloc(sizeof(struct pthread_rwlockattr));
  68         if (prwlockattr == NULL)
  69                 return (ENOMEM);
  70
  71         prwlockattr->pshared = PTHREAD_PROCESS_PRIVATE;
  72         *rwlockattr = prwlockattr;
  73         return (0);
  74 }
  75
  76 int
  77 _pthread_rwlockattr_setpshared(pthread_rwlockattr_t *rwlockattr, int pshared)
  78 {
  79         /* Only PTHREAD_PROCESS_PRIVATE is supported. */
  80         if (pshared != PTHREAD_PROCESS_PRIVATE)
  81                 return (EINVAL);
  82         (*rwlockattr)->pshared = pshared;
  83         return (0);
  84 }
  85
  86 __strong_reference(_pthread_rwlockattr_destroy, pthread_rwlockattr_destroy);
  87 __strong_reference(_pthread_rwlockattr_getpshared, pthread_rwlockattr_getpshared);
  88 __strong_reference(_pthread_rwlockattr_init, pthread_rwlockattr_init);
  89 __strong_reference(_pthread_rwlockattr_setpshared, pthread_rwlockattr_setpshared);