linux底层驱动机制之简单睡眠机制

//7简单睡眠机制
//1.定义
wait_queue_head_t readq;
//初始化
init_waitqueue_head(&readq);

//等队列待被唤醒
wait_event_interruptible(readq, flags != 0);

//唤醒等待的队列
wake_up_interruptible(&readq);