/* include/linux/wakelock.h
   *
   * Copyright (C) 2007-2012 Google, Inc.
   *
   * This software is licensed under the terms of the GNU General Public
   * License version 2, as published by the Free Software Foundation, and
   * may be copied, distributed, and modified under those terms.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   */
  
  #ifndef _LINUX_WAKELOCK_H
  #define _LINUX_WAKELOCK_H
  
  #include <linux/ktime.h>
  #include <linux/device.h>
  
  /* A wake_lock prevents the system from entering suspend or other low power
   * states when active. If the type is set to WAKE_LOCK_SUSPEND, the wake_lock
   * prevents a full system suspend.
   */
  
  enum {
  	WAKE_LOCK_SUSPEND, /* Prevent suspend */
  	WAKE_LOCK_TYPE_COUNT
  };
  
  struct wake_lock {
  	struct wakeup_source ws;
  };
  
  static inline void wake_lock_init(struct wake_lock *lock, int type,
  				  const char *name)
  {
  	wakeup_source_init(&lock->ws, name);
  }
  
  static inline void wake_lock_destroy(struct wake_lock *lock)
  {
  	wakeup_source_trash(&lock->ws);
  }
  
  static inline void wake_lock(struct wake_lock *lock)
  {
  	__pm_stay_awake(&lock->ws);
  }
  
  static inline void wake_lock_timeout(struct wake_lock *lock, long timeout)
  {
  	__pm_wakeup_event(&lock->ws, jiffies_to_msecs(timeout));
  }
  
  static inline void wake_unlock(struct wake_lock *lock)
  {
  	__pm_relax(&lock->ws);
  }
  
  static inline int wake_lock_active(struct wake_lock *lock)
  {
  	return lock->ws.active;
  }
  
  #endif