libev是高性能事件循环/事件模型的网络库,并且包含大量新特性,除了提供了基本的三大类事件（IO事件、定时器事件、信号事件）支持外还提供了周期事件、子进程事件、文件状态改变事件等多个事件的支持((Libev is a high performance event loop/event model of the network library, and contains a large number of new features, in addition to providing three