Kernel timer application in advanced Linux systems

Article title: kernel timer application in advanced Linux systems. Linux is a technology channel of the IT lab in China. Including desktop applications, Linux system management, kernel research, embedded systems, open-source and other basic classification Linux kernel timer applications

[CODE]#include #include #include #include #include#include #include MODULE_LICENSE("GPL");static DECLARE_WAIT_QUEUE_HEAD(wq);static int flag = 0;struct timer_list my_timer;void timer_test(unsigned long data){ printk("this is a test\n"); flag = 1; wake_up_interruptible(&wq);}static int __init hello_init(void){ init_timer(&my_timer); my_timer.expires = jiffies + 5000; my_timer.data = 0; my_timer.function = timer_test; add_timer(&my_timer); wait_event_interruptible(wq, flag != 0); flag = 0; return 0;}static void __exit hello_exit(void){ del_timer(&my_timer); printk(KERN_ALERT "Goodbye\n");}module_init(hello_init);module_exit(hello_exit);[/CODE]