折腾了好久，写了一个基础的IOCP网络模型类

最近在业余时间折腾了一下IOCP，IOCP模型在windows平台上网络通信这块效率还是蛮高的，所以特别是对游戏服务端开发来说，至少要对IOCP有一定的了解吧！！

 

发下代码，希望看到的大鸟们，帮忙指正下

 

IocpModel.h

#ifndef __IOCPMODEL_H
#define __IOCPMODEL_H

#include <iostream>
#include <WinSock2.h>

#pragma comment(lib,"ws2_32.lib")


#define OP_READ 1
#define OP_WRITE 2
#define OP_ACCEPT 3
#define OP_END -1

#define BUFFER_SIZE 1024

using namespace std;
//自定义结构，即“完成键”(单句柄数据)
typedef struct tagPER_HANDLE_DATA
{
    SOCKET Socket;
    SOCKADDR_STORAGE ClientAddr;
}PER_HANDLE_DATA,*LPPER_HANDLE_DATA;

//单个I/O操作数据
typedef struct tagPer_IO_DATA
{
    OVERLAPPED Overlapped;
    WSABUF DataBuf;
    char buffer[1024];
    int BufferLen;
    int OperationType;            //IO操作类型

}PER_IO_DATA, *LPPER_IO_DATA;

//线程方法
DWORD WINAPI ServerWorkerThread(LPVOID lpParam);


#endif

 

 

IocpModel.cpp

 

 

// IocpModel.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include "IocpModel.h"

#define Op_READ 1
#define Op_WRITE 2




WSADATA wsa;
HANDLE CompletionPort;
SYSTEM_INFO Systeminfo;
SOCKADDR_IN InternetAddr;

HANDLE ThreadHanle;


void ChangeHandleData(LPPER_IO_DATA lpPerIoContext,int state)
{
/**
    Fucntion Description:
        根据传进来的state，来进行改变下一步的IO操作
    Parameter：
        lpPerIoContext:上一个IO操作的结果
        state           上一个IO操作的状态
    Return Value:
        返回值为空
**/
    if(OP_READ == state)
    {
        //完成了读取客户端数据，并且返回数据
        lpPerIoContext->OperationType = OP_WRITE;
        ZeroMemory(&(lpPerIoContext->Overlapped),sizeof(OVERLAPPED));
        //返回数据给客户端
        char *sendClientData = "sendClientData";
        lpPerIoContext->DataBuf.buf = sendClientData;
        lpPerIoContext->DataBuf.len = BUFFER_SIZE;
    }
    if(OP_WRITE == state)
    {    
        //上一个IO数据发送客户端完成，结束就用 OP_END
        //继续接受，叫类型设置为OP_READ,注意清空下 buff
        //继续发送，将数据设置为OP_WRITE
        lpPerIoContext->OperationType = OP_READ;
        lpPerIoContext->DataBuf.buf = lpPerIoContext->buffer;
        lpPerIoContext->DataBuf.len = BUFFER_SIZE;
    }
    if(OP_ACCEPT == state)
    {
        //立起来的连接，把句柄设为读类型
        lpPerIoContext->OperationType = OP_READ;
        ZeroMemory(&(lpPerIoContext->Overlapped),sizeof(OVERLAPPED));
        ZeroMemory(&(lpPerIoContext->DataBuf),sizeof(lpPerIoContext->DataBuf));
        lpPerIoContext->DataBuf.buf = lpPerIoContext->buffer;
        lpPerIoContext->DataBuf.len = BUFFER_SIZE;
        cout << "数据包操作类型被改为 : OP_READ"<<endl;
    }
}

void SendHandleData(LPPER_IO_DATA lpPerIoContext,LPPER_HANDLE_DATA perHandData)
{
    /**
        根据lpPerIoContext对象OperationType来进行下一步的操作
    **/
    DWORD dwIosize = 0;
    int nResult  =0;
    DWORD RecvBytes = 0;
    DWORD nFlag = 0;
    if(lpPerIoContext->OperationType  == OP_WRITE)
    {
        /*发送数据到客户端*/
        nResult = WSASend(perHandData->Socket,&(lpPerIoContext->DataBuf),1,&dwIosize,0,&(lpPerIoContext->Overlapped),NULL);
        if((nResult == SOCKET_ERROR) && WSAGetLastError() != ERROR_IO_PENDING )
        {
            cout<< "WSASend error :"<<WSAGetLastError()<<endl;
            ::closesocket(perHandData->Socket);
            return;
        }

    }
    else if(lpPerIoContext->OperationType == OP_READ)
    {
        //清空，准备下个I/O数据
        ZeroMemory(&(lpPerIoContext->Overlapped),sizeof(OVERLAPPED));
        //注意：这里清空下buffer，要不然数据会跟上一条粘在一起
        ZeroMemory(&(lpPerIoContext->buffer),sizeof(lpPerIoContext->buffer));
        lpPerIoContext->DataBuf.len = BUFFER_SIZE;
        if(SOCKET_ERROR == WSARecv(perHandData->Socket, &(lpPerIoContext->DataBuf), 1,&RecvBytes,&nFlag,&(lpPerIoContext->Overlapped),NULL)){
            cout << "WSARecv() failed: " << WSAGetLastError() << endl;
            return;
        }
    }
    else if(lpPerIoContext->OperationType == OP_END)
    {
        ::closesocket(perHandData->Socket);
    }
}

int main()
{
    SOCKET ListenSock;
    SOCKET accpSocket;
    PER_HANDLE_DATA *PerHandleData = NULL;
    SOCKADDR_IN saRemote;
    int RemoteLen;

    cout<<"Server start......"<<endl;
    WSAStartup(MAKEWORD(2,2),&wsa);
    GetSystemInfo(&Systeminfo);

    //创建一个IO完成端口
    CompletionPort = CreateIoCompletionPort(INVALID_HANDLE_VALUE,NULL,0,0);
    if ( CompletionPort == INVALID_HANDLE_VALUE ) 
    {
        cout<<"完成端口创建失败!!!!"<<endl;
        return 0;
    }

    //创建IOCP工作线程(根据CPU个数 * 2)
    for(int i = 0;i< Systeminfo.dwNumberOfProcessors * 2 ; ++ i)
    {
        //创建线程
        ThreadHanle = CreateThread(NULL,0,ServerWorkerThread,CompletionPort,0,NULL);
        CloseHandle(ThreadHanle);
    }

    //4. 创建一个监听套接字，
    ListenSock = WSASocket(AF_INET,SOCK_STREAM,0,NULL,0,WSA_FLAG_OVERLAPPED);
    if(ListenSock == INVALID_SOCKET)
    {
        cout<<"套接字创建 失败!!"<<endl;
        return 0;
    }

    InternetAddr.sin_family = AF_INET;
    InternetAddr.sin_port = htons(5000);
    InternetAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    if(SOCKET_ERROR == bind(ListenSock,(SOCKADDR*)&InternetAddr,sizeof(InternetAddr)))
    {
        cout<<"服务器绑定地址信息 失败!! errid:"<<GetLastError()<<endl;
        closesocket(ListenSock);
        return 0;
    }
    int ret = listen(ListenSock, 5);
    if (ret == SOCKET_ERROR)
    {
        cout<<"监听套接字失败!! errid:"<<GetLastError()<<endl;
        closesocket(ListenSock);
        return 0;
    }

    while(TRUE)
    {
        //接受连接
        RemoteLen = sizeof(saRemote);
        //accpSocket = WSAAccept(ListenSock,NULL,NULL,NULL,0);
        accpSocket = accept(ListenSock, (SOCKADDR*)&saRemote, &RemoteLen);
        if(SOCKET_ERROR == accpSocket)
        {
            cout<<"接受套接字错误!! errid:"<<GetLastError()<<endl;
            closesocket(accpSocket);
            return 0;
        }

        //创建用来和套接字关联句柄信息结构
        PerHandleData =(LPPER_HANDLE_DATA)GlobalAlloc(GPTR,sizeof(PER_HANDLE_DATA));
        if(PerHandleData == NULL)
        {
            cout<<"PerHandleData = null!! errid:"<<GetLastError()<<endl;
            closesocket(accpSocket);
            return 0;
        }
        cout<< "Socker number: "<< accpSocket << " connected" << endl;
        PerHandleData->Socket = accpSocket;
        memcpy(&PerHandleData->ClientAddr,&saRemote,RemoteLen);


        //将接受的套接字关联到 完成端口
        if(CreateIoCompletionPort((HANDLE)accpSocket,CompletionPort,(DWORD)PerHandleData,0) == NULL)
        {
            cout<<"create complertion port error! errid:"<<GetLastError()<<endl;
            return 0;
        }

        LPPER_IO_DATA PerIoData = (LPPER_IO_DATA)GlobalAlloc(GPTR,sizeof(PER_IO_DATA));;
        ChangeHandleData(PerIoData,OP_ACCEPT);
        SendHandleData(PerIoData,PerHandleData);
    }
    return 0;
}


//创建线程函数
DWORD WINAPI ServerWorkerThread(LPVOID lpParam)
{
    HANDLE CompletionPort = (HANDLE)lpParam;
    DWORD ByresTransferred;
    LPOVERLAPPED lpOverlapped = NULL;
    LPPER_HANDLE_DATA PerHandleData = NULL;
    //LPPER_IO_DATA PerHandleData = NULL;
    LPPER_IO_DATA PerIoData = NULL;

    DWORD SendBytes;
    DWORD RecvBytes = 0;
    DWORD Flags = 0;
    BOOL bRet = FALSE;

    while (TRUE)
    {
        bRet = GetQueuedCompletionStatus(CompletionPort,
                                         &ByresTransferred,                    //的I/O操作所传送数据的字节数
                                         (PULONG_PTR)&PerHandleData,        //用于存放与之关联的Completion键
                                         (LPOVERLAPPED*)&lpOverlapped,
                                          INFINITE);

        if(!bRet)
        {
            closesocket(PerHandleData->Socket);
            ::GlobalFree(PerHandleData);
            ::GlobalFree(PerIoData);
            ::GlobalFree(lpOverlapped);
            cout<< "失去客户端连接！！！！" << bRet <<endl;
            return 0;
        }
        PerIoData = (LPPER_IO_DATA)lpOverlapped;

        //先检查一下,看看是否套接字有错误发生
        if(0 == ByresTransferred)
        {
            if(SOCKET_ERROR  == closesocket(PerHandleData->Socket)){
                cout<< "ByresTransferred SOCKET_ERROR err:" << GetLastError() << endl;
            }
            ::GlobalFree(PerHandleData);
            ::GlobalFree(PerIoData);
            cout<< "发生错误！ error" <<endl;
            continue;
        }

        
        //处理操作
        switch(PerIoData->OperationType)
        {
        case OP_ACCEPT:
            if(ByresTransferred)
            {
                //第一次连接接受到的数据
                ChangeHandleData(PerIoData,OP_ACCEPT);
                SendHandleData(PerIoData,PerHandleData);
            }
            else
            {
                //连接成功，数据没接受到，继续接受
                ChangeHandleData(PerIoData,OP_ACCEPT);
                SendHandleData(PerIoData,PerHandleData);
            }
            break;
        case OP_READ:
            cout<<"-----------------reader----------------------"<< endl;
            cout<<"传送数据的字节数:"<< ByresTransferred  <<endl;
            cout<<"接受数据为："<<PerIoData->DataBuf.buf<< endl;
            cout<<"---------------------------------------------"<< endl;
            ChangeHandleData(PerIoData,OP_READ);
            SendHandleData(PerIoData,PerHandleData);
            break;
        case OP_WRITE:
            ChangeHandleData(PerIoData,OP_WRITE);
            SendHandleData(PerIoData,PerHandleData);
            break;
        default:
            //其他操作
            break;
            
        }
        
    }

    return 0 ;
}