1、内核定时器定义:函数
struct timer_list { struct list_head entry; unsigned long expires; void (*function)(unsigned long); unsigned long data; struct tvec_base *base; #ifdef CONFIG_TIMER_STATS void *start_site; char start_comm[16]; int start_pid; #endif #ifdef CONFIG_LOCKDEP struct lockdep_map lockdep_map; #endif };
2、使用方法:ui
①struct timer_list timer;spa
void fun (unsigned long arg);code
unsigned long = 0;blog
②init_timer (&timer);it
③setup_timer (&timer, fun, (unsigned long )arg); io
④timer.expires = jiffires + 60 * HZ; //自定义一个超时时间,jiffires是计时器的当前值(单位是中断),HZ是每秒对应的中断次数。function
⑤add_timer (&timer);class
⑥若是是但愿周期运行,则每次在注册的函数执行完毕后须要从新设置、激活定时器,能够使用mod_timer()。内核注释:map
* mod_timer(timer, expires) is equivalent to:
*
* del_timer(timer); timer->expires = expires; add_timer(timer);
mod_timer (&timer, jiffires + 60 * HZ); //写在fun函数的最后
⑦del_timer (&timer);
ps:我的快速笔记,若有错误期待指出。