Refactor liburcu to support many flavors per compile unit
[urcu.git] / include / urcu / urcu-signal.h
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1#ifndef _URCU_SIGNAL_H
2#define _URCU_SIGNAL_H
27b012e2 3
b257a10b 4/*
4477a870 5 * urcu-signal.h
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6 *
7 * Userspace RCU header
8 *
6982d6d7 9 * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
af02d47e 10 * Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
5e7e64b9 11 *
121a5d44 12 * LGPL-compatible code should include this header with :
5e7e64b9 13 *
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14 * #define _LGPL_SOURCE
15 * #include <urcu.h>
16 *
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17 * This library is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU Lesser General Public
19 * License as published by the Free Software Foundation; either
20 * version 2.1 of the License, or (at your option) any later version.
21 *
22 * This library is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
25 * Lesser General Public License for more details.
26 *
27 * You should have received a copy of the GNU Lesser General Public
28 * License along with this library; if not, write to the Free Software
29 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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30 *
31 * IBM's contributions to this file may be relicensed under LGPLv2 or later.
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32 */
33
1430ee0b 34#include <stdlib.h>
69a757c9 35#include <pthread.h>
1430ee0b 36
7e30abe3 37/*
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38 * See urcu-pointer.h and urcu/static/urcu-pointer.h for pointer
39 * publication headers.
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40 */
41#include <urcu-pointer.h>
42
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43#ifdef __cplusplus
44extern "C" {
67ecffc0 45#endif
36bc70a8 46
4477a870 47#include <urcu/map/urcu-signal.h>
5e77fc1f 48
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49/*
50 * Important !
51 *
52 * Each thread containing read-side critical sections must be registered
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53 * with rcu_register_thread_mb() before calling rcu_read_lock_mb().
54 * rcu_unregister_thread_mb() should be called before the thread exits.
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55 */
56
121a5d44 57#ifdef _LGPL_SOURCE
b0d5e790 58
4477a870 59#include <urcu/static/urcu-signal.h>
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60
61/*
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62 * Mappings for static use of the userspace RCU library.
63 * Should only be used in LGPL-compatible code.
3a86deba 64 */
3a86deba 65
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66/*
67 * rcu_read_lock()
68 * rcu_read_unlock()
69 *
70 * Mark the beginning and end of a read-side critical section.
71 * DON'T FORGET TO USE RCU_REGISTER/UNREGISTER_THREAD() FOR EACH THREAD WITH
72 * READ-SIDE CRITICAL SECTION.
73 */
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74#define urcu_signal_read_lock _urcu_signal_read_lock
75#define urcu_signal_read_unlock _urcu_signal_read_unlock
76#define urcu_signal_read_ongoing _urcu_signal_read_ongoing
41718ff9 77
121a5d44 78#else /* !_LGPL_SOURCE */
27b012e2 79
40e140c9 80/*
121a5d44 81 * library wrappers to be used by non-LGPL compatible source code.
af7c2dbe 82 * See LGPL-only urcu/static/urcu-pointer.h for documentation.
40e140c9 83 */
cf380c2f 84
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85extern void urcu_signal_read_lock(void);
86extern void urcu_signal_read_unlock(void);
87extern int urcu_signal_read_ongoing(void);
cf380c2f 88
121a5d44 89#endif /* !_LGPL_SOURCE */
f4a486ac 90
4477a870 91extern void urcu_signal_synchronize_rcu(void);
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92
93/*
94 * Reader thread registration.
95 */
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96extern void urcu_signal_register_thread(void);
97extern void urcu_signal_unregister_thread(void);
27b012e2 98
e95f4e7f 99/*
02be5561 100 * Explicit rcu initialization, for "early" use within library constructors.
e95f4e7f 101 */
4477a870 102extern void urcu_signal_init(void);
e95f4e7f 103
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104/*
105 * Q.S. reporting are no-ops for these URCU flavors.
106 */
4477a870 107static inline void urcu_signal_quiescent_state(void)
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108{
109}
110
4477a870 111static inline void urcu_signal_thread_offline(void)
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112{
113}
114
4477a870 115static inline void urcu_signal_thread_online(void)
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116{
117}
118
67ecffc0 119#ifdef __cplusplus
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120}
121#endif
122
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123#include <urcu-call-rcu.h>
124#include <urcu-defer.h>
541d828d 125#include <urcu-flavor.h>
5e77fc1f 126
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127#ifndef URCU_API_MAP
128#include <urcu/map/clear.h>
129#endif
130
131#endif /* _URCU_SIGNAL_H */
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