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1 | #ifndef _LTTNG_WRAPPER_ATOMIC_H |
2 | #define _LTTNG_WRAPPER_ATOMIC_H | |
3 | ||
4 | /* | |
5 | * wrapper/atomic.h | |
6 | * | |
7 | * wrapper around linux/atomic.h. | |
8 | * | |
9 | * Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
10 | * | |
11 | * This library is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU Lesser General Public | |
13 | * License as published by the Free Software Foundation; only | |
14 | * version 2.1 of the License. | |
15 | * | |
16 | * This library is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * Lesser General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU Lesser General Public | |
22 | * License along with this library; if not, write to the Free Software | |
23 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
24 | */ | |
25 | ||
26 | #include <linux/version.h> | |
27 | #include <linux/atomic.h> | |
28 | ||
29 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)) | |
30 | static inline void lttng_smp_mb__before_atomic(void) | |
31 | { | |
32 | smp_mb__before_atomic(); | |
33 | } | |
34 | ||
35 | static inline void lttng_smp_mb__after_atomic(void) | |
36 | { | |
37 | smp_mb__after_atomic(); | |
38 | } | |
39 | #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)) */ | |
40 | static inline void lttng_smp_mb__before_atomic(void) | |
41 | { | |
42 | smp_mb__before_atomic_inc(); | |
43 | } | |
44 | ||
45 | static inline void lttng_smp_mb__after_atomic(void) | |
46 | { | |
47 | smp_mb__after_atomic_inc(); | |
48 | } | |
49 | #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)) */ | |
50 | ||
51 | #endif /* _LTTNG_WRAPPER_ATOMIC_H */ |