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 1.1 2005/02/01 12:38:27 davidxu Exp $ 28 */ 29 30 #include <errno.h> 31 #include <stdlib.h> 32 33 #include <pthread.h> 34 #include "thr_private.h" 35 36 __weak_reference(_pthread_rwlockattr_destroy, pthread_rwlockattr_destroy); 37 __weak_reference(_pthread_rwlockattr_getpshared, pthread_rwlockattr_getpshared); 38 __weak_reference(_pthread_rwlockattr_init, pthread_rwlockattr_init); 39 __weak_reference(_pthread_rwlockattr_setpshared, pthread_rwlockattr_setpshared); 40 41 int 42 _pthread_rwlockattr_destroy(pthread_rwlockattr_t *rwlockattr) 43 { 44 pthread_rwlockattr_t prwlockattr; 45 46 if (rwlockattr == NULL) 47 return(EINVAL); 48 49 prwlockattr = *rwlockattr; 50 51 if (prwlockattr == NULL) 52 return(EINVAL); 53 54 free(prwlockattr); 55 56 return(0); 57 } 58 59 int 60 _pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *rwlockattr, 61 int *pshared) 62 { 63 *pshared = (*rwlockattr)->pshared; 64 65 return(0); 66 } 67 68 int 69 _pthread_rwlockattr_init(pthread_rwlockattr_t *rwlockattr) 70 { 71 pthread_rwlockattr_t prwlockattr; 72 73 if (rwlockattr == NULL) 74 return(EINVAL); 75 76 prwlockattr = (pthread_rwlockattr_t) 77 malloc(sizeof(struct pthread_rwlockattr)); 78 79 if (prwlockattr == NULL) 80 return(ENOMEM); 81 82 prwlockattr->pshared = PTHREAD_PROCESS_PRIVATE; 83 *rwlockattr = prwlockattr; 84 85 return(0); 86 } 87 88 int 89 _pthread_rwlockattr_setpshared(pthread_rwlockattr_t *rwlockattr, int pshared) 90 { 91 /* Only PTHREAD_PROCESS_PRIVATE is supported. */ 92 if (pshared != PTHREAD_PROCESS_PRIVATE) 93 return(EINVAL); 94 95 (*rwlockattr)->pshared = pshared; 96 97 return(0); 98 } 99 100