Cleanup: remove leftover manual pthread detection
[urcu.git] / urcu.h
1 #ifndef _URCU_H
2 #define _URCU_H
3
4 /*
5 * urcu.h
6 *
7 * Userspace RCU header
8 *
9 * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
10 * Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
11 *
12 * LGPL-compatible code should include this header with :
13 *
14 * #define _LGPL_SOURCE
15 * #include <urcu.h>
16 *
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
30 *
31 * IBM's contributions to this file may be relicensed under LGPLv2 or later.
32 */
33
34 #include <stdlib.h>
35 #include <pthread.h>
36
37 /*
38 * See urcu-pointer.h and urcu/static/urcu-pointer.h for pointer
39 * publication headers.
40 */
41 #include <urcu-pointer.h>
42
43 #ifdef __cplusplus
44 extern "C" {
45 #endif
46
47 #include <urcu/map/urcu.h>
48
49 /*
50 * Important !
51 *
52 * Each thread containing read-side critical sections must be registered
53 * with rcu_register_thread_mb() before calling rcu_read_lock_mb().
54 * rcu_unregister_thread_mb() should be called before the thread exits.
55 */
56
57 #ifdef _LGPL_SOURCE
58
59 #include <urcu/static/urcu.h>
60
61 /*
62 * Mappings for static use of the userspace RCU library.
63 * Should only be used in LGPL-compatible code.
64 */
65
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 */
74 #ifdef RCU_MEMBARRIER
75 #define rcu_read_lock_memb _rcu_read_lock
76 #define rcu_read_unlock_memb _rcu_read_unlock
77 #define rcu_read_ongoing_memb _rcu_read_ongoing
78 #elif defined(RCU_SIGNAL)
79 #define rcu_read_lock_sig _rcu_read_lock
80 #define rcu_read_unlock_sig _rcu_read_unlock
81 #define rcu_read_ongoing_sig _rcu_read_ongoing
82 #elif defined(RCU_MB)
83 #define rcu_read_lock_mb _rcu_read_lock
84 #define rcu_read_unlock_mb _rcu_read_unlock
85 #define rcu_read_ongoing_mb _rcu_read_ongoing
86 #endif
87
88 #else /* !_LGPL_SOURCE */
89
90 /*
91 * library wrappers to be used by non-LGPL compatible source code.
92 * See LGPL-only urcu/static/urcu-pointer.h for documentation.
93 */
94
95 extern void rcu_read_lock(void);
96 extern void rcu_read_unlock(void);
97 extern int rcu_read_ongoing(void);
98
99 #endif /* !_LGPL_SOURCE */
100
101 extern void synchronize_rcu(void);
102
103 /*
104 * Reader thread registration.
105 */
106 extern void rcu_register_thread(void);
107 extern void rcu_unregister_thread(void);
108
109 /*
110 * Explicit rcu initialization, for "early" use within library constructors.
111 */
112 extern void rcu_init(void);
113
114 /*
115 * Q.S. reporting are no-ops for these URCU flavors.
116 */
117 static inline void rcu_quiescent_state(void)
118 {
119 }
120
121 static inline void rcu_thread_offline(void)
122 {
123 }
124
125 static inline void rcu_thread_online(void)
126 {
127 }
128
129 #ifdef __cplusplus
130 }
131 #endif
132
133 #include <urcu-call-rcu.h>
134 #include <urcu-defer.h>
135 #include <urcu-flavor.h>
136
137 #endif /* _URCU_H */
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