WSAEventSelect模型 应用实例，重写TCP服务器实例

// WSAEvent.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <winsock2.h>
#include <stdio.h>
  
#pragma comment(lib,"WS2_32")
class CInitSock
{
public:
     CInitSock(BYTE minorVer=2,BYTE majorVer=2)
     {
         WSADATA wsaData;
         WORD sockVersion = MAKEWORD(minorVer,majorVer);
         if(::WSAStartup(sockVersion,&wsaData)!=0)
         {
             exit(0);
         }
     }
     ~CInitSock()
     {
         ::WSACleanup();
     }
 };
CInitSock initSock;
int _tmain(int argc, _TCHAR* argv[])
{
    //事件句柄和套接字句柄表
    WSAEVENT eventArray[WSA_MAXIMUM_WAIT_EVENTS];
    SOCKET sockArray[WSA_MAXIMUM_WAIT_EVENTS];
    int nEventTotal = 0;
    USHORT nPort = 4567;
    SOCKET sListen = ::socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
    sockaddr_in sin;
    sin.sin_family = AF_INET;
    sin.sin_port = htons(nPort);
    sin.sin_addr.S_un.S_addr = INADDR_ANY;
    if(::bind(sListen,(sockaddr*)&sin,sizeof(sin))==SOCKET_ERROR)
    {
        printf("Failed bind()\n");
        return -1;
    }
    ::listen(sListen,5);
    //创建事件对象，并关联到新的套接字
    WSAEVENT event = ::WSACreateEvent();
    ::WSAEventSelect(sListen,event,FD_ACCEPT|FD_CLOSE);
    //添加到表中
    eventArray[nEventTotal] = event;
    sockArray[nEventTotal] = sListen;
    nEventTotal++;
    //处理网络事件
    while(TRUE)
    {
        //在所有事件上等待
        int nIndex = ::WSAWaitForMultipleEvents(nEventTotal,eventArray,FALSE,WSA_INFINITE,FALSE);
        //对每个事件调用函数，确定它的状态
        nIndex = nIndex-WSA_WAIT_EVENT_0;
        for(int i=nIndex;i<nEventTotal;i++)
        {
            nIndex = ::WSAWaitForMultipleEvents(1,&eventArray[i],TRUE,1000,FALSE);
            if(nIndex == WSA_WAIT_FAILED || nIndex == WSA_WAIT_TIMEOUT)
            {
                continue;
            }
            else
            {
                //获取到来的通知消息，自动重置受信事件
                WSANETWORKEVENTS event;
                ::WSAEnumNetworkEvents(sockArray[i],eventArray[i],&event);
                if(event.lNetworkEvents & FD_ACCEPT)
                {
                    if(event.iErrorCode[FD_ACCEPT_BIT] == 0)
                    {
                        if(nEventTotal>WSA_MAXIMUM_WAIT_EVENTS)
                        {
                            printf("Too many connections!");
                            continue;
                        }
                        SOCKET sNew = ::accept(sockArray[i],NULL,NULL);
                        WSAEVENT event = ::WSACreateEvent();
                        ::WSAEventSelect(sNew,event,FD_READ|FD_CLOSE|FD_WRITE);
                        //添加到表中
                        eventArray[nEventTotal] = event;
                        sockArray[nEventTotal] = sNew;
                        nEventTotal++;
                    }
                }
                else if(event.lNetworkEvents & FD_READ)
                {
                    if(event.iErrorCode[FD_ACCEPT_BIT] == 0)
                    {
                        char szText[256];
                        int nRecv = ::recv(sockArray[i],szText,strlen(szText),0);
                        if(nRecv > 0)
                        {
                            szText[nRecv] = '\0';
                            printf("接收到数据：%s\n",szText);
                        }
                    }
                }
                else if(event.lNetworkEvents & FD_CLOSE)
                {
                    if(event.iErrorCode[FD_ACCEPT_BIT] == 0)
                    {
                        ::closesocket(sockArray[i]);
                        for(int j=i;j<nEventTotal-1;j++)
                        {
                            eventArray[j] = eventArray[j+1];
                            sockArray[j] = sockArray[j+1];
                        }
                        nEventTotal--;
                    }
                }
                else if(event.lNetworkEvents & FD_WRITE)
                {

                }
            }
        }

    }
    return 0;
}