fd6cbda31bef58441344dd23d45a5f28b377dc28
7 * Userspace RCU QSBR header.
9 * LGPL-compatible code should include this header with :
11 * #define _LGPL_SOURCE
14 * This library is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU Lesser General Public
16 * License as published by the Free Software Foundation; either
17 * version 2.1 of the License, or (at your option) any later version.
19 * This library is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 * Lesser General Public License for more details.
24 * You should have received a copy of the GNU Lesser General Public
25 * License along with this library; if not, write to the Free Software
26 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 * IBM's contributions to this file may be relicensed under LGPLv2 or later.
34 #include <urcu/config.h>
37 * See urcu/pointer.h and urcu/static/pointer.h for pointer
38 * publication headers.
40 #include <urcu/pointer.h>
46 #include <urcu/map/urcu-qsbr.h>
48 #ifdef RCU_DEBUG /* For backward compatibility */
55 * Each thread containing read-side critical sections must be registered
56 * with rcu_register_thread() before calling rcu_read_lock().
57 * rcu_unregister_thread() should be called before the thread exits.
62 #include <urcu/static/urcu-qsbr.h>
65 * Mappings for static use of the userspace RCU library.
66 * Should only be used in LGPL-compatible code.
73 * Mark the beginning and end of a read-side critical section.
74 * DON'T FORGET TO USE rcu_register_thread/rcu_unregister_thread()
75 * FOR EACH THREAD WITH READ-SIDE CRITICAL SECTION.
77 #define urcu_qsbr_read_lock _urcu_qsbr_read_lock
78 #define urcu_qsbr_read_unlock _urcu_qsbr_read_unlock
79 #define urcu_qsbr_read_ongoing _urcu_qsbr_read_ongoing
81 #define urcu_qsbr_quiescent_state _urcu_qsbr_quiescent_state
82 #define urcu_qsbr_thread_offline _urcu_qsbr_thread_offline
83 #define urcu_qsbr_thread_online _urcu_qsbr_thread_online
85 #else /* !_LGPL_SOURCE */
88 * library wrappers to be used by non-LGPL compatible source code.
92 * QSBR read lock/unlock are guaranteed to be no-ops. Therefore, we expose them
93 * in the LGPL header for any code to use. However, the debug version is not
94 * nops and may contain sanity checks. To activate it, applications must be
95 * recompiled with -DDEBUG_RCU (even non-LGPL/GPL applications), or
96 * compiled against a urcu/config.h that has CONFIG_RCU_DEBUG defined.
97 * This is the best trade-off between license/performance/code
98 * triviality and library debugging & tracing features we could come up
102 #if (!defined(BUILD_QSBR_LIB) && !defined(DEBUG_RCU) && !defined(CONFIG_RCU_DEBUG))
104 static inline void urcu_qsbr_read_lock(void)
108 static inline void urcu_qsbr_read_unlock(void)
112 #else /* #if (!defined(BUILD_QSBR_LIB) && !defined(DEBUG_RCU) && !defined(CONFIG_RCU_DEBUG)) */
114 extern void urcu_qsbr_read_lock(void);
115 extern void urcu_qsbr_read_unlock(void);
117 #endif /* #else #if (!defined(BUILD_QSBR_LIB) && !defined(DEBUG_RCU) && !defined(CONFIG_RCU_DEBUG)) */
119 extern int urcu_qsbr_read_ongoing(void);
120 extern void urcu_qsbr_quiescent_state(void);
121 extern void urcu_qsbr_thread_offline(void);
122 extern void urcu_qsbr_thread_online(void);
124 #endif /* !_LGPL_SOURCE */
126 extern void urcu_qsbr_synchronize_rcu(void);
129 * Reader thread registration.
131 extern void urcu_qsbr_register_thread(void);
132 extern void urcu_qsbr_unregister_thread(void);
138 #include <urcu/call-rcu.h>
139 #include <urcu/defer.h>
140 #include <urcu/flavor.h>
143 #include <urcu/map/clear.h>
146 #endif /* _URCU_QSBR_H */
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