wrapper/atomic.h

   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 */