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include/linux/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 |