wrapper/spinlock.h

   1 /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
   2  *
   3  * wrapper/spinlock.h
   4  *
   5  * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  */
   7
   8 #ifndef _LTTNG_WRAPPER_SPINLOCK_H
   9 #define _LTTNG_WRAPPER_SPINLOCK_H
  10
  11 #include <linux/version.h>
  12
  13 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33))
  14
  15 #include <linux/string.h>
  16
  17 #define raw_spin_lock_init(lock)                                        \
  18         do {                                                            \
  19                 raw_spinlock_t __lock = __RAW_SPIN_LOCK_UNLOCKED;       \
  20                 memcpy(lock, &__lock, sizeof(lock));                    \
  21         } while (0)
  22
  23 #define raw_spin_is_locked(lock)        __raw_spin_is_locked(lock)
  24
  25 #define wrapper_desc_spin_lock(lock)    spin_lock(lock)
  26 #define wrapper_desc_spin_unlock(lock)  spin_unlock(lock)
  27
  28 #else
  29
  30 #define wrapper_desc_spin_lock(lock)    raw_spin_lock(lock)
  31 #define wrapper_desc_spin_unlock(lock)  raw_spin_unlock(lock)
  32
  33 #endif
  34 #endif /* _LTTNG_WRAPPER_SPINLOCK_H */