套接字 重叠模型 ，重叠I / O（Overlapped I/O）

模型使应用程序能达到更佳的系统性能。重叠模型的基本设计原理便是让应用程序使用一个

重叠的数据结构，一次投递一个或多个Winsock I/O请求。针对那些提交的请求，在它们完成

之后，应用程序可为它们提供服务。该模型适用于除Windows CE之外的各种Wi n d o w s平台。

模型的总体设计以Wi n 3 2重叠I / O机制为基础。那个机制可通过R e a d F i l e和Wr i t e F i l e两个函数，

针对设备执行I / O操作。-Socket overlap model, overlapping I/O (Overlapped I/O) model so that applications can achieve better system performance. The basic design principles overlap model is to enable applications to use an overlapping of the data structure, a delivery of one or more Winsock I/O requests. For those requests submitted in their complete, the application can provide them with services. The model is applicable in addition to Windows CE platform outside of Wi ndows. The overall design of the model to Wi n 3 2 overlapping I/O mechanisms. That the mechanism by R ead F ile and Wr ite F ile two functions for the device performs I/O operations.