ap/os/linux/linux-3.4.x/include/linux/wakelock.h

#ifndef _LINUX_WAKELOCK_H
#define _LINUX_WAKELOCK_H

#include <linux/ktime.h>
#include <linux/device.h>

struct wake_lock {
	struct wakeup_source ws;
};

enum {
	WAKE_LOCK_SUSPEND,
	WAKE_LOCK_TYPE_COUNT
};

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(struct wake_lock *lock)
{
	__pm_stay_awake(&lock->ws);
}

static inline void wake_unlock(struct wake_lock *lock)
{
	__pm_relax(&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 int wake_lock_active(struct wake_lock *lock)
{
	return lock->ws.active;
}

static inline void wake_lock_destroy(struct wake_lock *lock)
{
	wakeup_source_trash(&lock->ws);
}

#endif