/usr/include/urcu-bp.h is in liburcu-dev 0.7.12-0ubuntu2.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 | #ifndef _URCU_BP_H
#define _URCU_BP_H
/*
* urcu-bp.h
*
* Userspace RCU header, "bulletproof" version.
*
* Slower RCU read-side adapted for tracing library. Does not require thread
* registration nor unregistration. Also signal-safe.
*
* Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
* Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
*
* 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>
#ifdef __cplusplus
extern "C" {
#endif
#include <urcu/map/urcu-bp.h>
/*
* 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.
*/
/*
* See urcu-pointer.h and urcu/static/urcu-pointer.h for pointer
* publication headers.
*/
#include <urcu-pointer.h>
#ifdef _LGPL_SOURCE
#include <urcu/static/urcu-bp.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.
*/
#define rcu_read_lock_bp _rcu_read_lock
#define rcu_read_unlock_bp _rcu_read_unlock
#define rcu_dereference_bp rcu_dereference
#define rcu_cmpxchg_pointer_bp rcu_cmpxchg_pointer
#define rcu_xchg_pointer_bp rcu_xchg_pointer
#define rcu_set_pointer_bp rcu_set_pointer
#else /* !_LGPL_SOURCE */
/*
* library wrappers to be used by non-LGPL compatible source code.
* See LGPL-only urcu/static/urcu-pointer.h for documentation.
*/
extern void rcu_read_lock(void);
extern void rcu_read_unlock(void);
extern void *rcu_dereference_sym_bp(void *p);
#define rcu_dereference_bp(p) \
({ \
__typeof__(p) _________p1 = URCU_FORCE_CAST(__typeof__(p), \
rcu_dereference_sym_bp(URCU_FORCE_CAST(void *, p))); \
(_________p1); \
})
extern void *rcu_cmpxchg_pointer_sym_bp(void **p, void *old, void *_new);
#define rcu_cmpxchg_pointer_bp(p, old, _new) \
({ \
__typeof__(*(p)) _________pold = (old); \
__typeof__(*(p)) _________pnew = (_new); \
__typeof__(*(p)) _________p1 = URCU_FORCE_CAST(__typeof__(*(p)), \
rcu_cmpxchg_pointer_sym_bp(URCU_FORCE_CAST(void **, p), \
_________pold, \
_________pnew)); \
(_________p1); \
})
extern void *rcu_xchg_pointer_sym_bp(void **p, void *v);
#define rcu_xchg_pointer_bp(p, v) \
({ \
__typeof__(*(p)) _________pv = (v); \
__typeof__(*(p)) _________p1 = URCU_FORCE_CAST(__typeof__(*(p)),\
rcu_xchg_pointer_sym_bp(URCU_FORCE_CAST(void **, p), \
_________pv)); \
(_________p1); \
})
extern void *rcu_set_pointer_sym_bp(void **p, void *v);
#define rcu_set_pointer_bp(p, v) \
({ \
__typeof__(*(p)) _________pv = (v); \
__typeof__(*(p)) _________p1 = URCU_FORCE_CAST(__typeof__(*(p)), \
rcu_set_pointer_sym_bp(URCU_FORCE_CAST(void **, p), \
_________pv)); \
(_________p1); \
})
#endif /* !_LGPL_SOURCE */
extern void synchronize_rcu(void);
/*
* rcu_bp_before_fork, rcu_bp_after_fork_parent and rcu_bp_after_fork_child
* should be called around fork() system calls when the child process is not
* expected to immediately perform an exec(). For pthread users, see
* pthread_atfork(3).
*/
extern void rcu_bp_before_fork(void);
extern void rcu_bp_after_fork_parent(void);
extern void rcu_bp_after_fork_child(void);
/*
* In the bulletproof version, the following functions are no-ops.
*/
static inline void rcu_register_thread(void)
{
}
static inline void rcu_unregister_thread(void)
{
}
static inline void rcu_init(void)
{
}
/*
* Q.S. reporting are no-ops for these URCU flavors.
*/
static inline void rcu_quiescent_state(void)
{
}
static inline void rcu_thread_offline(void)
{
}
static inline void rcu_thread_online(void)
{
}
#ifdef __cplusplus
}
#endif
#include <urcu-call-rcu.h>
#include <urcu-defer.h>
#include <urcu-flavor.h>
#endif /* _URCU_BP_H */
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