mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-11 21:14:07 +08:00
3758b0f86e
rtc.h is not needed in alarmtimers when a forward declaration of struct rtc_device is provided. That allows to include posix-timers.h without adding more includes to alarmtimer.h or creating circular include dependencies. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Link: https://lkml.kernel.org/r/20190819143801.565389536@linutronix.de
67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_ALARMTIMER_H
|
|
#define _LINUX_ALARMTIMER_H
|
|
|
|
#include <linux/time.h>
|
|
#include <linux/hrtimer.h>
|
|
#include <linux/timerqueue.h>
|
|
|
|
struct rtc_device;
|
|
|
|
enum alarmtimer_type {
|
|
ALARM_REALTIME,
|
|
ALARM_BOOTTIME,
|
|
|
|
/* Supported types end here */
|
|
ALARM_NUMTYPE,
|
|
|
|
/* Used for tracing information. No usable types. */
|
|
ALARM_REALTIME_FREEZER,
|
|
ALARM_BOOTTIME_FREEZER,
|
|
};
|
|
|
|
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.
|
|
* @timer: hrtimer used to schedule events while running
|
|
* @function: Function pointer to be executed when the timer fires.
|
|
* @type: Alarm type (BOOTTIME/REALTIME).
|
|
* @state: 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));
|
|
void alarm_start(struct alarm *alarm, ktime_t start);
|
|
void 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
|