/usr/include/urcu-qsbr.h is in liburcu-dev 0.9.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 | #ifndef _URCU_QSBR_H
#define _URCU_QSBR_H
/*
* urcu-qsbr.h
*
* Userspace RCU QSBR header.
*
* LGPL-compatible code should include this header with :
*
* #define _LGPL_SOURCE
* #include <urcu.h>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* IBM's contributions to this file may be relicensed under LGPLv2 or later.
*/
#include <stdlib.h>
#include <pthread.h>
/*
* See urcu-pointer.h and urcu/static/urcu-pointer.h for pointer
* publication headers.
*/
#include <urcu-pointer.h>
#ifdef __cplusplus
extern "C" {
#endif
#include <urcu/map/urcu-qsbr.h>
#ifdef RCU_DEBUG /* For backward compatibility */
#define DEBUG_RCU
#endif
/*
* Important !
*
* Each thread containing read-side critical sections must be registered
* with rcu_register_thread() before calling rcu_read_lock().
* rcu_unregister_thread() should be called before the thread exits.
*/
#ifdef _LGPL_SOURCE
#include <urcu/static/urcu-qsbr.h>
/*
* Mappings for static use of the userspace RCU library.
* Should only be used in LGPL-compatible code.
*/
/*
* rcu_read_lock()
* rcu_read_unlock()
*
* Mark the beginning and end of a read-side critical section.
* DON'T FORGET TO USE rcu_register_thread/rcu_unregister_thread()
* FOR EACH THREAD WITH READ-SIDE CRITICAL SECTION.
*/
#define rcu_read_lock_qsbr _rcu_read_lock
#define rcu_read_unlock_qsbr _rcu_read_unlock
#define rcu_read_ongoing_qsbr _rcu_read_ongoing
#define rcu_quiescent_state_qsbr _rcu_quiescent_state
#define rcu_thread_offline_qsbr _rcu_thread_offline
#define rcu_thread_online_qsbr _rcu_thread_online
#else /* !_LGPL_SOURCE */
/*
* library wrappers to be used by non-LGPL compatible source code.
*/
/*
* QSBR read lock/unlock are guaranteed to be no-ops. Therefore, we expose them
* in the LGPL header for any code to use. However, the debug version is not
* nops and may contain sanity checks. To activate it, applications must be
* recompiled with -DDEBUG_RCU (even non-LGPL/GPL applications). This is the
* best trade-off between license/performance/code triviality and
* library debugging & tracing features we could come up with.
*/
#if (!defined(BUILD_QSBR_LIB) && !defined(DEBUG_RCU))
static inline void rcu_read_lock(void)
{
}
static inline void rcu_read_unlock(void)
{
}
#else /* !DEBUG_RCU */
extern void rcu_read_lock(void);
extern void rcu_read_unlock(void);
#endif /* !DEBUG_RCU */
extern int rcu_read_ongoing(void);
extern void rcu_quiescent_state(void);
extern void rcu_thread_offline(void);
extern void rcu_thread_online(void);
#endif /* !_LGPL_SOURCE */
extern void synchronize_rcu(void);
/*
* Reader thread registration.
*/
extern void rcu_register_thread(void);
extern void rcu_unregister_thread(void);
#ifdef __cplusplus
}
#endif
#include <urcu-call-rcu.h>
#include <urcu-defer.h>
#include <urcu-flavor.h>
#endif /* _URCU_QSBR_H */
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