函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\time\alarmtimer.c Create Date:2022-07-27 11:45:32
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：alarm_try_to_cancel - Tries to cancel an alarm timer*@alarm: ptr to alarm to be canceled* Returns 1 if the timer was canceled, 0 if it was not running,* and -1 if the callback was running

函数原型：int alarm_try_to_cancel(struct alarm *alarm)

返回类型：int

参数：

类型参数名称
struct alarm *alarm
416  base等于struct alarm_base - Alarm timer bases*@lock: Lock for syncrhonized access to the base*@timerqueue: Timerqueue head managing the list of events*@gettime: Function to read the time correlating to the base*@base_clockid: clockid for the base[type]
420  spin_lock_irqsave( & lock, flags)
421  ret等于hrtimer_try_to_cancel - try to deactivate a timer*@timer: hrtimer to stop* Returns:* * 0 when the timer was not active* * 1 when the timer was active* * -1 when the timer is currently executing the callback function and* cannot be stopped
422  如果ret大于等于0则alarmtimer_dequeue - Removes an alarm timer from an alarm_base timerqueue*@base: pointer to the base where the timer is running*@alarm: pointer to alarm being removed* Removes alarm to a alarm_base timerqueue* Must hold base->lock when calling.
424  spin_unlock_irqrestore( & lock, flags)
426  trace_alarmtimer_cancel(alarm, gettime())
427  返回:ret
调用者
名称描述
alarm_cancelalarm_cancel - Spins trying to cancel an alarm timer until it is done*@alarm: ptr to alarm to be canceled* Returns 1 if the timer was canceled, 0 if it was not active.
do_timerfd_settime