lib/libthr/thread/thr_rwlockattr.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 1998 Alex Nash
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __FBSDID("$FreeBSD$");
  31
  32 #include "namespace.h"
  33 #include <errno.h>
  34 #include <stdlib.h>
  35 #include <pthread.h>
  36 #include "un-namespace.h"
  37
  38 #include "thr_private.h"
  39
  40 __weak_reference(_pthread_rwlockattr_destroy, pthread_rwlockattr_destroy);
  41 __weak_reference(_pthread_rwlockattr_getpshared, pthread_rwlockattr_getpshared);
  42 __weak_reference(_pthread_rwlockattr_init, pthread_rwlockattr_init);
  43 __weak_reference(_pthread_rwlockattr_setpshared, pthread_rwlockattr_setpshared);
  44
  45 int
  46 _pthread_rwlockattr_destroy(pthread_rwlockattr_t *rwlockattr)
  47 {
  48         pthread_rwlockattr_t prwlockattr;
  49
  50         if (rwlockattr == NULL)
  51                 return (EINVAL);
  52         prwlockattr = *rwlockattr;
  53         if (prwlockattr == NULL)
  54                 return (EINVAL);
  55         free(prwlockattr);
  56         return (0);
  57 }
  58
  59 int
  60 _pthread_rwlockattr_getpshared(
  61     const pthread_rwlockattr_t * __restrict rwlockattr,
  62     int * __restrict pshared)
  63 {
  64
  65         *pshared = (*rwlockattr)->pshared;
  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 = malloc(sizeof(struct pthread_rwlockattr));
  78         if (prwlockattr == NULL)
  79                 return (ENOMEM);
  80
  81         prwlockattr->pshared = PTHREAD_PROCESS_PRIVATE;
  82         *rwlockattr = prwlockattr;
  83         return (0);
  84 }
  85
  86 int
  87 _pthread_rwlockattr_setpshared(pthread_rwlockattr_t *rwlockattr, int pshared)
  88 {
  89
  90         if (pshared != PTHREAD_PROCESS_PRIVATE &&
  91             pshared != PTHREAD_PROCESS_SHARED)
  92                 return (EINVAL);
  93         (*rwlockattr)->pshared = pshared;
  94         return (0);
  95 }