说明：  C++ window下的IOCP， IOCP（I/O Completion Port）,常称I/O完成端口。 IOCP模型属于一种通讯模型，适用于能控制并发执行的高负载服务器的一个技术。 通俗一点说，就是用于高效处理很多很多的客户端进行数据交换的一个模型。或者可以说，就是能异步I/O操作的模型。
(It is often called I/O to complete the port. The IOCP model belongs to a communication model and is applicable to a high load server that can control concurrent execution. Popularly speaking, it is a model for efficient data processing of many, many clients. Or it can be said that it is asynchronous I/O operation model.)