内核定时器struct timer

内核定时器struct timer_list


 1 #include<linux/module.h>
 2 #include<linux/timer.h>
 3 #include <linux/fs.h>
 4 MODULE_LICENSE("GPL");
 5 
 6 struct timer_list mytimer;
 7 void mytimer_func(unsigned long data)
 8 {
 9     static int count=0;
10     printk("---------%d",data);
11 }
12 int __init mytimer_init(void)
13 {
14     printk("timer init!
");
15     
16     init_timer(&mytimer);
17     mytimer.expires=jiffies+HZ*5;
18     mytimer.function=mytimer_func;
19     mytimer.data=100;
20     add_timer(&mytimer);
21     return 0;
22 }
23 void __exit mytimer_exit(void)
24 {
25     del_timer(&mytimer);
26     printk("timer exit!
");
27 }
28 module_init(mytimer_init);
29 module_exit(mytimer_exit);

struct timer_list {
    /*
     * All fields that change during normal runtime grouped to the
     * same cacheline
     */
    struct list_head entry;
    unsigned long expires;
    struct tvec_base *base;

    void (*function)(unsigned long);
    unsigned long data;

    int slack;

#ifdef CONFIG_TIMER_STATS
    int start_pid;
    void *start_site;
    char start_comm[16];
#endif
#ifdef CONFIG_LOCKDEP
    struct lockdep_map lockdep_map;
#endif
};

编程时候需要用到struct timer_list 结构体。

expires 需要设置，如果需要5秒之后定时器自动调用函数，则：

mytimer.expires=jiffies+HZ*5;
5秒之后自动调用.function 指向的函数。

另外给一个不错的链接：http://blog.sina.com.cn/s/blog_6a1837e90100oarr.html