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
53extern "C" {
54#endif
55
56extern sigset_t fillset;	/* for actually blocking all signals */
57
58extern void sig_mutex_lock(mutex_t *);
59extern void sig_mutex_unlock(mutex_t *);
60extern void sig_rw_rdlock(rwlock_t *);
61extern void sig_rw_wrlock(rwlock_t *);
62extern void sig_rw_unlock(rwlock_t *);
63
64extern void _sigoff(void);
65extern void _sigon(void);
66
67extern 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