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
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include "namespace.h"
  31 #include <errno.h>
  32 #include <stdlib.h>
  33 #include <pthread.h>
  34 #include "un-namespace.h"
  35
  36 #include "thr_private.h"
  37
  38 __weak_reference(_pthread_rwlockattr_destroy, pthread_rwlockattr_destroy);
  39 __weak_reference(_pthread_rwlockattr_getpshared, pthread_rwlockattr_getpshared);
  40 __weak_reference(_pthread_rwlockattr_init, pthread_rwlockattr_init);
  41 __weak_reference(_pthread_rwlockattr_setpshared, pthread_rwlockattr_setpshared);
  42
  43 int
  44 _pthread_rwlockattr_destroy(pthread_rwlockattr_t *rwlockattr)
  45 {
  46         pthread_rwlockattr_t prwlockattr;
  47
  48         if (rwlockattr == NULL)
  49                 return (EINVAL);
  50         prwlockattr = *rwlockattr;
  51         if (prwlockattr == NULL)
  52                 return (EINVAL);
  53         free(prwlockattr);
  54         return (0);
  55 }
  56
  57 int
  58 _pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *rwlockattr,
  59     int *pshared)
  60 {
  61
  62         *pshared = (*rwlockattr)->pshared;
  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 = malloc(sizeof(struct pthread_rwlockattr));
  75         if (prwlockattr == NULL)
  76                 return (ENOMEM);
  77
  78         prwlockattr->pshared = PTHREAD_PROCESS_PRIVATE;
  79         *rwlockattr = prwlockattr;
  80         return (0);
  81 }
  82
  83 int
  84 _pthread_rwlockattr_setpshared(pthread_rwlockattr_t *rwlockattr, int pshared)
  85 {
  86
  87         if (pshared != PTHREAD_PROCESS_PRIVATE &&
  88             pshared != PTHREAD_PROCESS_SHARED)
  89                 return (EINVAL);
  90         (*rwlockattr)->pshared = pshared;
  91         return (0);
  92 }