| 1 | |
| 2 | /* |
| 3 | * urcu-pointer.c |
| 4 | * |
| 5 | * library wrappers to be used by non-LGPL compatible source code. |
| 6 | * |
| 7 | * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 8 | * Copyright (c) 2009 Paul E. McKenney, IBM Corporation. |
| 9 | * |
| 10 | * This library is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU Lesser General Public |
| 12 | * License as published by the Free Software Foundation; either |
| 13 | * version 2.1 of the License, or (at your option) any later version. |
| 14 | * |
| 15 | * This library is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * Lesser General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU Lesser General Public |
| 21 | * License along with this library; if not, write to the Free Software |
| 22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 23 | * |
| 24 | * IBM's contributions to this file may be relicensed under LGPLv2 or later. |
| 25 | */ |
| 26 | |
| 27 | #include <urcu/uatomic_arch.h> |
| 28 | |
| 29 | #include "urcu-pointer-static.h" |
| 30 | /* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */ |
| 31 | #include "urcu-pointer.h" |
| 32 | |
| 33 | extern void synchronize_rcu(void); |
| 34 | |
| 35 | void *rcu_dereference_sym(void *p) |
| 36 | { |
| 37 | return _rcu_dereference(p); |
| 38 | } |
| 39 | |
| 40 | void *rcu_set_pointer_sym(void **p, void *v) |
| 41 | { |
| 42 | cmm_wmb(); |
| 43 | return uatomic_set(p, v); |
| 44 | } |
| 45 | |
| 46 | void *rcu_xchg_pointer_sym(void **p, void *v) |
| 47 | { |
| 48 | cmm_wmb(); |
| 49 | return uatomic_xchg(p, v); |
| 50 | } |
| 51 | |
| 52 | void *rcu_cmpxchg_pointer_sym(void **p, void *old, void *_new) |
| 53 | { |
| 54 | cmm_wmb(); |
| 55 | return uatomic_cmpxchg(p, old, _new); |
| 56 | } |