wakelock.h
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/* 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