1
2#ifndef _LINUX_ALARMTIMER_H
3#define _LINUX_ALARMTIMER_H
4
5#include <linux/time.h>
6#include <linux/hrtimer.h>
7#include <linux/timerqueue.h>
8
9struct rtc_device;
10
11enum alarmtimer_type {
12 ALARM_REALTIME,
13 ALARM_BOOTTIME,
14
15
16 ALARM_NUMTYPE,
17
18
19 ALARM_REALTIME_FREEZER,
20 ALARM_BOOTTIME_FREEZER,
21};
22
23enum alarmtimer_restart {
24 ALARMTIMER_NORESTART,
25 ALARMTIMER_RESTART,
26};
27
28
29#define ALARMTIMER_STATE_INACTIVE 0x00
30#define ALARMTIMER_STATE_ENQUEUED 0x01
31
32
33
34
35
36
37
38
39
40
41
42struct alarm {
43 struct timerqueue_node node;
44 struct hrtimer timer;
45 enum alarmtimer_restart (*function)(struct alarm *, ktime_t now);
46 enum alarmtimer_type type;
47 int state;
48 void *data;
49};
50
51void alarm_init(struct alarm *alarm, enum alarmtimer_type type,
52 enum alarmtimer_restart (*function)(struct alarm *, ktime_t));
53void alarm_start(struct alarm *alarm, ktime_t start);
54void alarm_start_relative(struct alarm *alarm, ktime_t start);
55void alarm_restart(struct alarm *alarm);
56int alarm_try_to_cancel(struct alarm *alarm);
57int alarm_cancel(struct alarm *alarm);
58
59u64 alarm_forward(struct alarm *alarm, ktime_t now, ktime_t interval);
60u64 alarm_forward_now(struct alarm *alarm, ktime_t interval);
61ktime_t alarm_expires_remaining(const struct alarm *alarm);
62
63
64struct rtc_device *alarmtimer_get_rtcdev(void);
65
66#endif
67