include/wrapper/atomic.h

   1 /* SPDX-License-Identifier: (GPL-2.0-only OR LGPL-2.1-only)
   2  *
   3  * wrapper/atomic.h
   4  *
   5  * wrapper around linux/atomic.h.
   6  *
   7  * Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  */
   9
  10 #ifndef _LTTNG_WRAPPER_ATOMIC_H
  11 #define _LTTNG_WRAPPER_ATOMIC_H
  12
  13 #include <linux/version.h>
  14 #include <linux/atomic.h>
  15
  16 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0))
  17 static inline void lttng_smp_mb__before_atomic(void)
  18 {
  19         smp_mb__before_atomic();
  20 }
  21
  22 static inline void lttng_smp_mb__after_atomic(void)
  23 {
  24         smp_mb__after_atomic();
  25 }
  26 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)) */
  27 static inline void lttng_smp_mb__before_atomic(void)
  28 {
  29         smp_mb__before_atomic_inc();
  30 }
  31
  32 static inline void lttng_smp_mb__after_atomic(void)
  33 {
  34         smp_mb__after_atomic_inc();
  35 }
  36 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)) */
  37
  38 #endif /* _LTTNG_WRAPPER_ATOMIC_H */