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 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _LIBNSL_INCLUDE_MT_H 28 #define _LIBNSL_INCLUDE_MT_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 /* 33 * Threading and mutual exclusion declarations of primitives used for 34 * MT operation of libnsl code. 35 * 36 * Note: These primitives are designed to achieve the effect of avoiding a 37 * deadlock possibility by an interface operation being called from 38 * a signal handler while holding a lock. 39 * Note: the sig_*() functions use the _sigoff() and _sigon() consolidation 40 * private interfaces provided by libc to defer all asynchronously 41 * generated signals for the duration of holding the lock. Unlike 42 * blocking all signals with sigprocmask() or thr_sigsetmask(), 43 * _sigoff() allows signals with default dispositions to exercise 44 * their default actions (killing the process, stopping the process). 45 */ 46 47 #include <thread.h> 48 #include <pthread.h> 49 #include <signal.h> 50 #include <synch.h> 51 52 #ifdef __cplusplus 53 extern "C" { 54 #endif 55 56 extern sigset_t fillset; /* for actually blocking all signals */ 57 58 extern void sig_mutex_lock(mutex_t *); 59 extern void sig_mutex_unlock(mutex_t *); 60 extern void sig_rw_rdlock(rwlock_t *); 61 extern void sig_rw_wrlock(rwlock_t *); 62 extern void sig_rw_unlock(rwlock_t *); 63 64 extern void _sigoff(void); 65 extern void _sigon(void); 66 67 extern void *thr_get_storage(pthread_key_t *, size_t, void(*)(void *)); 68 69 #ifdef __cplusplus 70 } 71 #endif 72 73 #endif /* _LIBNSL_INCLUDE_MT_H */ 74