hrtimer高精度定时器的简单使用【学习笔记】

 #include <linux/module.h>

 #include <linux/kernel.h>

 #include <linux/hrtimer.h>

 #include <linux/jiffies.h>

 static struct hrtimer timer;

 ktime_t kt;

 static enum hrtimer_restart        hrtimer_hander(struct hrtimer *timer)

 {

     printk("zbzhuang:I am in hrtimer hander\r\n");

     hrtimer_forward(timer,timer->base->get_time(),kt);

     return HRTIMER_RESTART;

 }

 static int __init test_init(void)

 {

     printk("zbzhuang:---------%s-----------\r\n",__func__);

     kt = ktime_set(,);

     hrtimer_init(&timer,CLOCK_MONOTONIC,HRTIMER_MODE_REL);

     hrtimer_start(&timer,kt,HRTIMER_MODE_REL);

     timer.function = hrtimer_hander;

     return ;

 }

 static void __exit test_exit(void)

 {

     hrtimer_cancel(&timer);

     printk("zbzhuang------------test over---------------\r\n");

 }

 module_init(test_init);

 module_exit(test_exit);

 MODULE_LICENSE("GPL");

 MODULE_AUTHOR("[email protected]");