转 网络IO模型:同步IO和异步IO,阻塞IO和非阻塞IO
Stevens在文章中一共比较了五种IO Model:
* blocking IO
* nonblocking IO
* IO multiplexing
* signal driven IO
* asynchronous IO
由signal driven IO在实际中并不常用,所以主要介绍其余四种IO Model。
http://www.cnblogs.com/Forever-Kenlen-Ja/p/4480718.html