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7e30abe3 MD |
1 | |
2 | /* | |
3 | * urcu-pointer.c | |
4 | * | |
5 | * library wrappers to be used by non-LGPL compatible source code. | |
6 | * | |
6982d6d7 | 7 | * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
7e30abe3 MD |
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 | ||
a2e7bf9c | 27 | #include <urcu/uatomic.h> |
49617de1 | 28 | |
af7c2dbe | 29 | #include "urcu/static/urcu-pointer.h" |
7e30abe3 MD |
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 | ||
2ff1db4a | 35 | void *rcu_dereference_sym(void *p) |
7e30abe3 MD |
36 | { |
37 | return _rcu_dereference(p); | |
38 | } | |
39 | ||
40 | void *rcu_set_pointer_sym(void **p, void *v) | |
41 | { | |
5481ddb3 | 42 | cmm_wmb(); |
424d4ed5 MD |
43 | uatomic_set(p, v); |
44 | return v; | |
7e30abe3 MD |
45 | } |
46 | ||
47 | void *rcu_xchg_pointer_sym(void **p, void *v) | |
48 | { | |
5481ddb3 | 49 | cmm_wmb(); |
7e30abe3 MD |
50 | return uatomic_xchg(p, v); |
51 | } | |
52 | ||
53 | void *rcu_cmpxchg_pointer_sym(void **p, void *old, void *_new) | |
54 | { | |
5481ddb3 | 55 | cmm_wmb(); |
bf9de1b7 | 56 | return uatomic_cmpxchg(p, old, _new); |
7e30abe3 | 57 | } |