projects / urcu.git / blame
| Commit | Line | Data |
|---|---|---|
| fdee2e6d MD |
1 | #ifndef _URCU_BP_H |
| 2 | #define _URCU_BP_H | |
| 3 | ||
| 4 | /* | |
| 5 | * urcu-bp.h | |
| 6 | * | |
| 7 | * Userspace RCU header, "bulletproof" version. | |
| 8 | * | |
| 9 | * Slower RCU read-side adapted for tracing library. Does not require thread | |
| 10 | * registration nor unregistration. Also signal-safe. | |
| 11 | * | |
| 12 | * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | |
| 13 | * Copyright (c) 2009 Paul E. McKenney, IBM Corporation. | |
| 14 | * | |
| 15 | * LGPL-compatible code should include this header with : | |
| 16 | * | |
| 17 | * #define _LGPL_SOURCE | |
| 18 | * #include <urcu.h> | |
| 19 | * | |
| 20 | * This library is free software; you can redistribute it and/or | |
| 21 | * modify it under the terms of the GNU Lesser General Public | |
| 22 | * License as published by the Free Software Foundation; either | |
| 23 | * version 2.1 of the License, or (at your option) any later version. | |
| 24 | * | |
| 25 | * This library is distributed in the hope that it will be useful, | |
| 26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 28 | * Lesser General Public License for more details. | |
| 29 | * | |
| 30 | * You should have received a copy of the GNU Lesser General Public | |
| 31 | * License along with this library; if not, write to the Free Software | |
| 32 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 33 | * | |
| 34 | * IBM's contributions to this file may be relicensed under LGPLv2 or later. | |
| 35 | */ | |
| 36 | ||
| 37 | #include <stdlib.h> | |
| 38 | #include <pthread.h> | |
| 39 | ||
| 40 | /* | |
| 41 | * See urcu-pointer.h and urcu-pointer-static.h for pointer publication headers. | |
| 42 | */ | |
| 43 | #include <urcu-pointer.h> | |
| 44 | ||
| 45 | /* | |
| 46 | * Important ! | |
| 47 | * | |
| 48 | * Each thread containing read-side critical sections must be registered | |
| 49 | * with rcu_register_thread() before calling rcu_read_lock(). | |
| 50 | * rcu_unregister_thread() should be called before the thread exits. | |
| 51 | */ | |
| 52 | ||
| 53 | #ifdef _LGPL_SOURCE | |
| 54 | ||
| 55 | #include <urcu-bp-static.h> | |
| 56 | ||
| 57 | /* | |
| 58 | * Mappings for static use of the userspace RCU library. | |
| 59 | * Should only be used in LGPL-compatible code. | |
| 60 | */ | |
| 61 | ||
| 62 | /* | |
| 63 | * rcu_read_lock() | |
| 64 | * rcu_read_unlock() | |
| 65 | * | |
| 66 | * Mark the beginning and end of a read-side critical section. | |
| 67 | */ | |
| 68 | #define rcu_read_lock() _rcu_read_lock() | |
| 69 | #define rcu_read_unlock() _rcu_read_unlock() | |
| 70 | ||
| 71 | #else /* !_LGPL_SOURCE */ | |
| 72 | ||
| 73 | /* | |
| 74 | * library wrappers to be used by non-LGPL compatible source code. | |
| 75 | * See LGPL-only urcu-pointer-static.h for documentation. | |
| 76 | */ | |
| 77 | ||
| 78 | extern void rcu_read_lock(void); | |
| 79 | extern void rcu_read_unlock(void); | |
| 80 | ||
| 81 | #endif /* !_LGPL_SOURCE */ | |
| 82 | ||
| 83 | extern void synchronize_rcu(void); | |
| 84 | ||
| 85 | /* | |
| 86 | * In the bulletproof version, the following functions are no-ops. | |
| 87 | */ | |
| 88 | static inline void rcu_register_thread(void) | |
| 89 | { | |
| 90 | } | |
| 91 | ||
| 92 | static inline void rcu_unregister_thread(void) | |
| 93 | { | |
| 94 | } | |
| 95 | ||
| 96 | static inline void urcu_init(void) | |
| 97 | { | |
| 98 | } | |
| 99 | ||
| 100 | #endif /* _URCU_BP_H */ |