Linux异步通知的相关内容

文章 2012-05-24 来自：开发者社区

Linux设备驱动开发-linux驱动中的异步通知

前面已经说了阻塞与非阻塞的访问方式，这里我们就继续说下异步通知的机制。什么是异步通知呢？异步通知的意思就是，一旦设备就绪，则主动通知应用程序，应用程序根本就不需要查询设备状态，类似于中断的概念，一个进程收到一个信号与处理器收到一个中断请求可以说是一样的。信号是异步的，一个进程不必通过任何操作来等待信号的到达。下面我们就看一下在linux中机制的实现方式。在linux中，异步通知是使用信号....

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