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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2007 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 "mt.h" 30 #include <stdlib.h> 31 32 void * 33 thr_get_storage(pthread_key_t *keyp, size_t size, void (*destructor)(void *)) 34 { 35 void *addr; 36 37 if (pthread_key_create_once_np(keyp, destructor) != 0) 38 return (NULL); 39 addr = pthread_getspecific(*keyp); 40 if (addr == NULL && size != 0) { 41 addr = calloc(1, size); 42 if (addr != NULL && pthread_setspecific(*keyp, addr) != 0) { 43 free(addr); 44 return (NULL); 45 } 46 } 47 48 return (addr); 49 } 50 51 /* 52 * sig_mutex_lock() and sig_mutex_unlock() are the same 53 * as mutex_lock() and mutex_unlock() except that all 54 * signals are deferred while the lock is held. Likewise 55 * for sig_rw_rdlock(), sig_rw_wrlock() and sig_rw_unlock(). 56 * 57 * _sigoff() and _sigon() are consolidation-private 58 * interfaces in libc that defer and enable signals. 59 * Calls to these can nest but must be balanced, so 60 * nested calls to these functions work properly. 61 */ 62 63 void 64 sig_mutex_lock(mutex_t *mp) 65 { 66 _sigoff(); 67 (void) mutex_lock(mp); 68 } 69 70 void 71 sig_mutex_unlock(mutex_t *mp) 72 { 73 (void) mutex_unlock(mp); 74 _sigon(); 75 } 76 77 void 78 sig_rw_rdlock(rwlock_t *rwlp) 79 { 80 _sigoff(); 81 (void) rw_rdlock(rwlp); 82 } 83 84 void 85 sig_rw_wrlock(rwlock_t *rwlp) 86 { 87 _sigoff(); 88 (void) rw_wrlock(rwlp); 89 } 90 91 void 92 sig_rw_unlock(rwlock_t *rwlp) 93 { 94 (void) rw_unlock(rwlp); 95 _sigon(); 96 } 97