#ifndef _LINUX_ALARMTIMER_H#define _LINUX_ALARMTIMER_H #include <linux/time.h>#include <linux/hrtimer.h>#include <linux/timerqueue.h>#include <linux/rtc.h> enum alarmtimer_type {	ALARM_REALTIME,	ALARM_BOOTTIME, 	ALARM_NUMTYPE,}; enum alarmtimer_restart {	ALARMTIMER_NORESTART,	ALARMTIMER_RESTART,};  #define ALARMTIMER_STATE_INACTIVE	0x00#define ALARMTIMER_STATE_ENQUEUED	0x01 /** * struct alarm - Alarm timer structure * @node:	timerqueue node for adding to the event list this value *		also includes the expiration time. * @period:	Period for recuring alarms * @function:	Function pointer to be executed when the timer fires. * @type:	Alarm type (BOOTTIME/REALTIME) * @enabled:	Flag that represents if the alarm is set to fire or not * @data:	Internal data value. */struct alarm {	struct timerqueue_node	node;	struct hrtimer		timer;	enum alarmtimer_restart	(*function)(struct alarm *, ktime_t now);	enum alarmtimer_type	type;	int			state;	void			*data;}; void alarm_init(struct alarm *alarm, enum alarmtimer_type type,		enum alarmtimer_restart (*function)(struct alarm *, ktime_t));int alarm_start(struct alarm *alarm, ktime_t start);int alarm_start_relative(struct alarm *alarm, ktime_t start);void alarm_restart(struct alarm *alarm);int alarm_try_to_cancel(struct alarm *alarm);int alarm_cancel(struct alarm *alarm); u64 alarm_forward(struct alarm *alarm, ktime_t now, ktime_t interval);u64 alarm_forward_now(struct alarm *alarm, ktime_t interval);ktime_t alarm_expires_remaining(const struct alarm *alarm); /* Provide way to access the rtc device being used by alarmtimers */struct rtc_device *alarmtimer_get_rtcdev(void); #endif