核心timer使用

 

init_timer，初始化
add_timer，啟動
mod_timer，修改
del_timer，刪除

timer_list結構
function定時函數
data定時函數所需的參數
expires期望的定時時間如jiffies+xx*HZ表示幾秒後

// declare timer_list, define function
struct timer_list* ti;
static void timer_handler(unsigned long l)
{
// do something
// then start timer again
mod_timer((timer_list*)l, jiffers+2*HZ);
}

// start timer
ti = kmalloc(sizeof(struct timer_list)), GFP_KERNEL);
init_timer(ti);
ti->expires = jiffers+2*HZ;
ti->data = (unsigned long)ti;
ti->function = &timer_handler;
add_timer(ti);