1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1999-2003 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include "lint.h" 30 #include "thr_uberdata.h" 31 32 /* 33 * UNIX98 34 * pthread_rwlockattr_init: allocates the mutex attribute object and 35 * initializes it with the default values. 36 */ 37 #pragma weak pthread_rwlockattr_init = _pthread_rwlockattr_init 38 int 39 _pthread_rwlockattr_init(pthread_rwlockattr_t *attr) 40 { 41 rwlattr_t *ap; 42 43 if ((ap = lmalloc(sizeof (rwlattr_t))) == NULL) 44 return (ENOMEM); 45 ap->pshared = DEFAULT_TYPE; 46 attr->__pthread_rwlockattrp = ap; 47 return (0); 48 } 49 50 /* 51 * UNIX98 52 * pthread_rwlockattr_destroy: frees the rwlock attribute object and 53 * invalidates it with NULL value. 54 */ 55 #pragma weak pthread_rwlockattr_destroy = _pthread_rwlockattr_destroy 56 int 57 _pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr) 58 { 59 if (attr == NULL || attr->__pthread_rwlockattrp == NULL) 60 return (EINVAL); 61 lfree(attr->__pthread_rwlockattrp, sizeof (rwlattr_t)); 62 attr->__pthread_rwlockattrp = NULL; 63 return (0); 64 } 65 66 /* 67 * UNIX98 68 * pthread_rwlockattr_setpshared: sets the shared attr to PRIVATE or SHARED. 69 */ 70 #pragma weak pthread_rwlockattr_setpshared = _pthread_rwlockattr_setpshared 71 int 72 _pthread_rwlockattr_setpshared(pthread_rwlockattr_t *attr, int pshared) 73 { 74 rwlattr_t *ap; 75 76 if (attr != NULL && (ap = attr->__pthread_rwlockattrp) != NULL && 77 (pshared == PTHREAD_PROCESS_PRIVATE || 78 pshared == PTHREAD_PROCESS_SHARED)) { 79 ap->pshared = pshared; 80 return (0); 81 } 82 return (EINVAL); 83 } 84 85 /* 86 * UNIX98 87 * pthread_rwlockattr_getpshared: gets the shared attr. 88 */ 89 #pragma weak pthread_rwlockattr_getpshared = _pthread_rwlockattr_getpshared 90 int 91 _pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *attr, int *pshared) 92 { 93 rwlattr_t *ap; 94 95 if (attr != NULL && (ap = attr->__pthread_rwlockattrp) != NULL && 96 pshared != NULL) { 97 *pshared = ap->pshared; 98 return (0); 99 } 100 return (EINVAL); 101 } 102 103 /* 104 * UNIX98 105 * pthread_rwlock_init: Initializes the rwlock object. It copies the 106 * pshared attr into type argument and calls rwlock_init(). 107 */ 108 #pragma weak pthread_rwlock_init = _pthread_rwlock_init 109 int 110 _pthread_rwlock_init(pthread_rwlock_t *rwlock, pthread_rwlockattr_t *attr) 111 { 112 rwlattr_t *ap; 113 int type; 114 115 if (attr == NULL) 116 type = DEFAULT_TYPE; 117 else if ((ap = attr->__pthread_rwlockattrp) != NULL) 118 type = ap->pshared; 119 else 120 return (EINVAL); 121 122 return (__rwlock_init((rwlock_t *)rwlock, type, NULL)); 123 } 124