/usr/include/gdnsd/prcu.h is in gdnsd-dev 2.2.0-1ubuntu1.
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 | /* Copyright © 2014 Brandon L Black <blblack@gmail.com>
*
* This file is part of gdnsd.
*
* gdnsd is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* gdnsd 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with gdnsd. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef GDNSD_PRCU_H
#define GDNSD_PRCU_H
#include <pthread.h>
// source for GDNSD_B_QSBR definition for out-of-tree includers
#ifndef GDNSD_SOURCE_TREE
#include <gdnsd/bopts.h>
#endif
#pragma GCC visibility push(default)
extern pthread_rwlock_t gdnsd_prcu_rwlock_;
#pragma GCC visibility pop
// comes from config.h in-tree, or above if out-of-tree
#if GDNSD_B_QSBR
// in-tree we define _LGPL_SOURCE anyways which is a superset of
// URCU_INLINE_SMALL_FUNCTIONS, but this will help for consumers
// of this header which aren't LGPL-compat
#define URCU_INLINE_SMALL_FUNCTIONS 1
#include <urcu-qsbr.h>
#define gdnsd_prcu_rdr_thread_start() rcu_register_thread()
#define gdnsd_prcu_rdr_online() rcu_thread_online()
#define gdnsd_prcu_rdr_quiesce() rcu_quiescent_state()
#define gdnsd_prcu_rdr_lock() rcu_read_lock()
#define gdnsd_prcu_rdr_deref(s) rcu_dereference((s))
#define gdnsd_prcu_rdr_unlock() rcu_read_unlock()
#define gdnsd_prcu_rdr_offline() rcu_thread_offline()
#define gdnsd_prcu_rdr_thread_end() rcu_unregister_thread()
#define gdnsd_prcu_upd_lock() do { } while(0)
#define gdnsd_prcu_upd_assign(d,s) rcu_assign_pointer((d),(s))
#define gdnsd_prcu_upd_unlock() synchronize_rcu()
#else // !GDNSD_B_QSBR
#define gdnsd_prcu_rdr_thread_start() do { } while(0)
#define gdnsd_prcu_rdr_online() do { } while(0)
#define gdnsd_prcu_rdr_quiesce() do { } while(0)
#define gdnsd_prcu_rdr_lock() pthread_rwlock_rdlock(&gdnsd_prcu_rwlock_)
#define gdnsd_prcu_rdr_deref(s) (s)
#define gdnsd_prcu_rdr_unlock() pthread_rwlock_unlock(&gdnsd_prcu_rwlock_)
#define gdnsd_prcu_rdr_offline() do { } while(0)
#define gdnsd_prcu_rdr_thread_end() do { } while(0)
#define gdnsd_prcu_upd_lock() pthread_rwlock_wrlock(&gdnsd_prcu_rwlock_)
#define gdnsd_prcu_upd_assign(d,s) (d) = (s)
#define gdnsd_prcu_upd_unlock() pthread_rwlock_unlock(&gdnsd_prcu_rwlock_)
#endif // GDNSD_B_QSBR
#endif // GDNSD_PRCU_H
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