30.多线程，分组服务端，接收数据性能瓶颈与优化

客户端只发，服务端只收。

服务端代码进行了优化：

1.fd_set进行了备份，如果客户端没有发生接入，离开。则，每次select的时候，使用备份的fd_set。

2.使用std::map<SOCKET, ClientSocket*> _clients;替代vector加快了客户端的查找操作。

 

客户端：

DataHeader.hpp 

#ifndef _MessageHeader_hpp_
#define _MessageHeader_hpp_


enum CMD
{
    CMD_LOGIN,
    CMD_LOGIN_RET,
    CMD_LOGOUT,
    CMD_LOGOUT_RET,
    CMD_NEW_USER_JOIN,
    CMD_ERROR
};

struct DataHeader
{
    DataHeader()
    {
        dataLength = sizeof(DataHeader);
        cmd = CMD_ERROR;
    }
    short dataLength;
    short cmd;
};

struct Login :public DataHeader
{
    Login()
    {
        dataLength = sizeof(Login);
        cmd = CMD_LOGIN;
    }
    char userName[32];
    char passWord[32];
    //char data[932];
    char data[32];
};

struct LoginResult :public DataHeader
{
    LoginResult()
    {
        dataLength = sizeof(LoginResult);
        cmd = CMD_LOGIN_RET;
        ret = 1;
    }
    int ret;
    //char data[992];
    char data[92];
};

struct LogOut :public DataHeader
{
    LogOut()
    {
        dataLength = sizeof(LogOut);
        cmd = CMD_LOGOUT;
    }
    char userName[32];
};

struct LogOutResult :public DataHeader
{
    LogOutResult()
    {
        dataLength = sizeof(LogOutResult);
        cmd = CMD_LOGOUT_RET;
        ret = 1;
    }
    int ret;

};

struct NewUserJoin :public DataHeader
{
    NewUserJoin()
    {
        dataLength = sizeof(NewUserJoin);
        cmd = CMD_NEW_USER_JOIN;
        sock = -1;
    }
    int sock;
};

#endif

 

EasyTcpClient.hpp 

#ifndef _EasyTcpClient_hpp_
#define _EasyTcpClient_hpp_

#ifdef _WIN32
    #include <windows.h>
    #include <WinSock2.h>
#else
    #include<unistd.h>
    #include<arpa/inet.h>
    #include<string.h>
    #define SOCKET int
    #define INVALID_SOCKET (SOCKET)(~0)
    #define SOCKET_ERROR (-1)
#endif

#include <stdio.h>
#include "DataHeader.hpp"

#define RECV_BUFF_SIZE 10240

class  EasyTcpClient
{
public:
    EasyTcpClient()
    {
        _sock = INVALID_SOCKET;

        _isConnect = false;
    }
    //虚析构函数
    virtual ~EasyTcpClient()
    {
        Close();
    }

    //初始化socket
    void InitSocket()
    {
#ifdef _WIN32
        WORD ver = MAKEWORD(2, 2);
        WSADATA dat;
        WSAStartup(ver, &dat);
#endif // _WIN32

        if (_sock != INVALID_SOCKET)
        {
            Close();
        }

        _sock = socket(AF_INET, SOCK_STREAM, 0);
        if (INVALID_SOCKET == _sock)
        {
            printf("错误，建立Socket失败...\n");
        }
        else
        {
            printf("建立Socket成功...\n");
        }

    }

    int Connect(const char* ip, unsigned short port)
    {
        if (INVALID_SOCKET == _sock)
        {
            InitSocket();
        }

        sockaddr_in _sin = {};
        _sin.sin_family = AF_INET;
        _sin.sin_port = htons(port);
#ifdef _WIN32
        _sin.sin_addr.S_un.S_addr = inet_addr(ip);
#else
        _sin.sin_addr.s_addr = inet_addr(ip);
#endif

        int ret = connect(_sock, (const sockaddr*)&_sin, sizeof(sockaddr_in));
        if (SOCKET_ERROR == ret)
        {
            printf("错误，连接服务端失败...\n");
        }
        else
        {
            _isConnect = true;
            printf("连接服务端成功...\n");
        }

        return ret;
    }

    bool isRun()
    {
        return (_sock != INVALID_SOCKET) && _isConnect;
    }

    bool onRun()
    {
        if (isRun())
        {
            fd_set fdRead;
            FD_ZERO(&fdRead);
            FD_SET(_sock, &fdRead);

            timeval t = { 0, 0};
            int ret = select(_sock + 1, &fdRead, 0, 0, &t);
            if (ret < 0)
            {
                Close();
                printf("select任务结束1。\n");
                return false;
            }

            if (FD_ISSET(_sock, &fdRead))
            {
                FD_CLR(_sock, &fdRead);//从集合移除了_sock
                if (-1 == RecvData())
                {
                    Close();
                    printf("select任务结束2。\n");
                    return false;
                }
            }

        }
        return false;
    }

    //接收数据 处理粘包 拆分包
    int RecvData()
    {
        int nLen = recv(_sock, _szRecv, RECV_BUFF_SIZE, 0);
        //printf("nLen=%d\n", nLen);
        if (nLen <= 0)
        {
            printf("服务端%d已退出。\n", _sock);
            return -1;
        }

        //将收到的数据拷贝到消息缓冲区
        memcpy(_szMsgBuf + _lastPos, _szRecv, nLen);
        //消息缓冲区的数据尾部位置后移
        _lastPos += nLen;

        //判断消息缓冲区的数据长度大于消息头DataHeader长度
        while (_lastPos >= sizeof(DataHeader))
        {
            //这时就可以知道当前消息的长度
            DataHeader* header = (DataHeader*)_szMsgBuf;
            //判断是否可以获取一个完整消息
            if (_lastPos >= header->dataLength)
            {
                //剩余的未处理消息缓冲区数据的长度
                int nSize = _lastPos - header->dataLength;
                //处理网络消息
                onNetMsg(header);
                //将消息缓冲区剩余未处理数据前移
                memcpy(_szMsgBuf, _szMsgBuf + header->dataLength, nSize);
                //将消息缓冲区的数据尾部位置前移
                _lastPos = nSize;
            }
            else
            {
                //消息缓冲区剩余数据不够一条完整消息
                break;
            }
        }

        return 0;
    }

    void onNetMsg(DataHeader* pData)
    {
        switch (pData->cmd)
        {
        case CMD_LOGIN_RET:
        {
            LoginResult *pLogin = (LoginResult*)pData;
            //printf("login result:%d\n", pLogin->ret);
        }
        break;
        case CMD_LOGOUT_RET:
        {
            LogOutResult *pLogOut = (LogOutResult*)pData;
            printf("log out result:%d\n", pLogOut->ret);
        }
        break;
        case CMD_NEW_USER_JOIN:
        {
            NewUserJoin *pMsg = (NewUserJoin*)pData;
            printf("new user:%d join.\n", pMsg->sock);
        }
        break;
        case CMD_ERROR:
        {
            printf("收到服务端消息:CMD_ERROR，数据长度:%d\n", pData->dataLength);
        }
        break;
        default:
        {
            printf("收到未定义消息，数据长度:%d\n", pData->dataLength);
        }
        }
    }

    //发送数据
    int SendData(DataHeader pHeader[])
    {    
        int ret = SOCKET_ERROR;
        if (isRun() && pHeader)
        {
            ret =  send(_sock, (const char*)pHeader, pHeader->dataLength, 0);
            if (SOCKET_ERROR == ret)
            {
                Close();
            }
        }
        return ret;
    }

    //发送数据
    int SendData(DataHeader* header, int nLen)
    {
        int ret = SOCKET_ERROR;
        if (isRun() && header)
        {
            ret = send(_sock, (const char*)header, nLen, 0);
            if (SOCKET_ERROR == ret)
            {
                Close();
            }
        }
        return ret;
    }

    void Close()
    {
        if (_sock != INVALID_SOCKET)
        {
#ifdef _WIN32
            closesocket(_sock);
            //清除Windows socket环境
            WSACleanup();
#else
            close(_sock);
#endif
            _sock = INVALID_SOCKET;
        }

        _isConnect = false;
    }

private:
    SOCKET _sock;

    //接收缓冲区
    char _szRecv[RECV_BUFF_SIZE] = {};

    //第二缓冲区 消息缓冲区
    char _szMsgBuf[RECV_BUFF_SIZE * 5] = {};

    //消息缓冲区的数据尾部位置
    int _lastPos = 0;

    bool _isConnect;
};


#endif

 

 

main.cpp

#ifdef  _WIN32
    #define WIN32_LEAN_AND_MEAN
    #define _WINSOCK_DEPRECATED_NO_WARNINGS //也可以放到工程属性，预处理中
    #define _CRT_SECURE_NO_WARNINGS
    #pragma comment(lib, "ws2_32.lib")
#endif 

#include <stdio.h>
#include <thread>
#include "EasyTcpClient.hpp"

//开启4个线程，每个线程250个客户端

const int cCount = 10000;
const int tCount = 4;

EasyTcpClient* client[cCount];

bool g_bRun = true;
void cmdThread()
{
    while (true)
    {
        //3输入请求命令
        char cmdBuf[128] = {};
        scanf("%s", cmdBuf);
        getchar();
        //4处理请求
        if (0 == strcmp(cmdBuf, "exit"))
        {
            printf("退出cmdThread线程\n");
            g_bRun = false;
            return;
        }
        else
        {
            printf("wrong cmd, please input cmd again.\n");
        }
    }
}

void sendThread(int id)
{
    int c = cCount / tCount;
    int begin = (id - 1)*c;
    int end = id*c;
    for (int n = begin; n<end; n++)
    {
        if (!g_bRun)
        {
            return;
        }

        client[n] = new EasyTcpClient();

    }

    for (int n = begin; n<end; n++)
    {
        if (!g_bRun)
        {
            return;
        }

        client[n]->Connect("127.0.0.1", 4567);
        printf("connect=%d\n", n);
    }

    std::chrono::milliseconds t(3000);
    std::this_thread::sleep_for(t);

    //Login login = {};
    //strcpy(login.userName, "jj");
    //strcpy(login.passWord, "ww");

    Login login[10];
    for (int n = 0; n < 10; n++)
    {
        strcpy(login[n].userName, "lyd");
        strcpy(login[n].passWord, "lydmm");
    }
    const int nLen = sizeof(login);

    while (g_bRun)
    {
        for (int n = begin; n < end; n++)
        {
            client[n]->SendData(login, nLen);
            //client[n]->SendData(&login);
            //client[n]->onRun();
        }

    }

    for (int n = begin; n < end; n++)
    {
        client[n]->Close();
    }

    for (int n = begin; n < end; n++)
    {
        delete client[n];
        client[n] = nullptr;
    }
}


int main()
{
    std::thread t(cmdThread);
    t.detach();

    std::thread client_th[tCount];
    for (int n=0;n<tCount;n++)
    {
        client_th[n] = std::thread(sendThread, n+1);
    }

    for (int n = 0; n<tCount; n++)
    {
        client_th[n].join();
    }

    printf("已退出");
    getchar();
    return 0;
}

 

 

 

服务端：

DataHeader.hpp 同客户端

CELLTimestamp.hpp

#ifndef _CELLTimestamp_hpp_
#define _CELLTimestamp_hpp_


#include <chrono>

using namespace std::chrono;

class CELLTimestamp
{
public:
    CELLTimestamp()
    {
        update();
    }

    ~CELLTimestamp()
    {

    }

    void update()
    {
        _begin = high_resolution_clock::now();
    }

    //获取当前秒
    double getElapsedTimeInSec()
    {
        return getElapsedTimeInMicroSec()*0.000001;
    }

    //获取当前毫秒
    double getElapsedTimeInMilliSec()
    {
        return getElapsedTimeInMicroSec()*0.001;
    }

    //获取当前微妙
    long long getElapsedTimeInMicroSec()
    {
        return duration_cast<microseconds>(high_resolution_clock::now() - _begin).count();
    }

private:
    time_point<high_resolution_clock> _begin;
};

#endif // !

 

 

EasyTcpServer.hpp

#ifndef _EasyTcpServer_hpp_
#define _EasyTcpServer_hpp_

#ifdef _WIN32
    #define FD_SETSIZE      2506
    #define WIN32_LEAN_AND_MEAN
    #define _WINSOCK_DEPRECATED_NO_WARNINGS //也可以放到工程属性，预处理中
    #define _CRT_SECURE_NO_WARNINGS
    #include <windows.h>
    #include <WinSock2.h>
    #pragma comment(lib, "ws2_32.lib")
#else
    #include<unistd.h>
    #include<arpa/inet.h>
    #include<string.h>
    #define SOCKET int
    #define INVALID_SOCKET (SOCKET)(~0)
    #define SOCKET_ERROR (-1)
#endif

#include <stdio.h>
#include <vector>
#include <map>
#include <thread>
#include <mutex>
#include <atomic>
#include "DataHeader.hpp"
#include "CELLTimestamp.hpp"

#define _CELLSERVERS_THREAD_COUNT 4

#define RECV_BUFF_SIZE 10240

//客户端数据类型
class ClientSocket
{
public:
    ClientSocket(SOCKET sockfd = INVALID_SOCKET)
    {
        _sockfd = sockfd;
        //memset(_szMsgBuf, 0, sizeof(_szMsgBuf));
    }

    SOCKET sockfd()
    {
        return _sockfd;
    }

    char* msgBuf()
    {
        return _szMsgBuf;
    }

    int getlastPos()
    {
        return _lastPos;
    }

    void setlastPos(int pos)
    {
        _lastPos = pos;
    }


    //指定socket发送数据
    int SendData(DataHeader* header)
    {
        if (header)
        {
            return send(_sockfd, (const char*)header, header->dataLength, 0);
        }
        return SOCKET_ERROR;
    }

private:
    SOCKET _sockfd = INVALID_SOCKET;
    char _szMsgBuf[RECV_BUFF_SIZE * 5] = {};
    int _lastPos = 0;
};

//网络事件接口
class INetEvent
{
public:
    //客户端加入事件
    virtual void OnNetJoin(ClientSocket* pClient) = 0;
    //客户端离开事件
    virtual void OnNetLeave(ClientSocket* pClient) = 0;
    //客户端消息事件
    virtual void OnNetMsg(ClientSocket* pClient, DataHeader* header) = 0;
};

class CellServer
{
public:
    CellServer(SOCKET sock = INVALID_SOCKET)
    {
        _sock = sock;
        _pNetEvent = nullptr;
    }

    ~CellServer()
    {
        Close();

        //_sock = INVALID_SOCKET;
    }

    //关闭socket
    void Close()
    {

#ifdef _WIN32
        // 关闭套接字
        for (auto iter : _clients)
        {
            closesocket(iter.second->sockfd());
            delete iter.second;
        }
#else
        for (auto iter : _clients)
        {
            close(iter.second->sockfd());
            delete iter.second;
        }
#endif

        _clients.clear();

    }

    //是否工作中
    bool isRun()
    {
        return _sock != INVALID_SOCKET;
    }

    void Start()
    {
        //std::thread t(&CellServer::onRun, this);
        _pThread =  std::thread(std::mem_fn(&CellServer::onRun), this);

    }

    //接收数据 处理粘包 拆分包
    int RecvData(ClientSocket* pClient)
    {

        // 接收客户端数据
        int nLen = (int)recv(pClient->sockfd(), _szRecv, RECV_BUFF_SIZE, 0);
        //printf("nLen=%d\n", nLen);
        if (nLen <= 0)
        {
            //printf("客户端%d已退出。\n", pClient->sockfd());
            return -1;
        }

        memcpy(pClient->msgBuf() + pClient->getlastPos(), _szRecv, nLen);
        //消息缓冲区的数据尾部位置后移
        pClient->setlastPos(pClient->getlastPos() + nLen);


        //判断消息缓冲区的数据长度大于消息头DataHeader长度
        while (pClient->getlastPos() >= sizeof(DataHeader))
        {
            //这时就可以知道当前消息的长度
            DataHeader* header = (DataHeader*)pClient->msgBuf();
            //判断是否可以获取一个完整消息
            if (pClient->getlastPos() >= header->dataLength)
            {
                //剩余的未处理消息缓冲区数据的长度
                int nSize = pClient->getlastPos() - header->dataLength;
                //处理网络消息
                OnNetMsg(pClient, header);
                //将消息缓冲区剩余未处理数据前移
                memcpy(pClient->msgBuf(), pClient->msgBuf() + header->dataLength, nSize);
                //将消息缓冲区的数据尾部位置前移
                pClient->setlastPos(nSize);
            }
            else
            {
                //消息缓冲区剩余数据不够一条完整消息
                break;
            }
        }

        return 0;
    }


    //响应网络消息
    //响应网络消息
    virtual void OnNetMsg(ClientSocket* pClient, DataHeader* header)
    {
        _pNetEvent->OnNetMsg(pClient, header);
    }


    FD_SET _fdRead_bak;//备份
    bool _clients_change;
    SOCKET _maxSock;
    bool onRun()
    {
        _clients_change = true;
        while ( isRun() )
        {

            if (_clientsBuff.size() > 0)
            {
                std::lock_guard<std::mutex> lock(_mutex);
                for (auto pClient : _clientsBuff)
                {
                    _clients[pClient->sockfd()] = pClient;
                }
                _clientsBuff.clear();

                _clients_change = true;
            }

            //如果没有需要处理的客户端，就跳过
            if (_clients.empty())
            {
                std::chrono::milliseconds t(1);
                std::this_thread::sleep_for(t);
                continue;
            }

            fd_set fdRead;
            //fd_set fdWrite;
            //fd_set fdExp;

            FD_ZERO(&fdRead);
            if (_clients_change)//如果有客户端，加入，退出
            {
                _maxSock = _clients.begin()->second->sockfd();
                for (auto iter : _clients)
                {
                    FD_SET(iter.second->sockfd(), &fdRead);
                    if (_maxSock < iter.second->sockfd())
                    {
                        _maxSock = iter.second->sockfd();
                    }
                }

                memcpy(&_fdRead_bak, &fdRead, sizeof(fd_set));
                _clients_change = false;
            }
            else
            {
                memcpy(&fdRead, &_fdRead_bak, sizeof(fd_set));
            }



            //timeval t = { 0, 0};
            //int ret = select(maxSock + 1, &fdRead, &fdWrite, &fdExp, &t);
            int ret = select(_maxSock + 1, &fdRead, nullptr, nullptr, nullptr);
            if (ret < 0)
            {
                printf("select任务结束。\n");
                Close();
                return false;
            }
            else if (ret == 0)
            {
                continue;
            }

#ifdef _WIN32
            for (int n = 0; n < fdRead.fd_count; n++)
            {
                auto iter = _clients.find(fdRead.fd_array[n]);
                if (iter != _clients.end())
                {
                    if (-1 == RecvData(iter->second))
                    {
                        if (_pNetEvent)
                            _pNetEvent->OnNetLeave(iter->second);
                        _clients_change = true;
                        delete iter->second;
                        _clients.erase(iter->first);
                    }
                }
                else {
                    printf("error. if (iter != _clients.end())\n");
                }

            }
#else
            std::vector<ClientSocket*> temp;
            for (auto iter : _clients)
            {
                if (FD_ISSET(iter.second->sockfd(), &fdRead))
                {
                    if (-1 == RecvData(iter.second))
                    {
                        if (_pNetEvent)
                            _pNetEvent->OnNetLeave(iter.second);
                        _clients_change = true;
                        temp.push_back(iter.second);
                    }
                }
            }
            for (auto pClient : temp)
            {
                _clients.erase(pClient->sockfd());
                delete pClient;
            }
#endif

        }

        return true;
    }

    void addClient(ClientSocket* pClient)
    {
        _mutex.lock();
        _clientsBuff.push_back(pClient);
        _mutex.unlock();
    }

    size_t getClientCount()
    {
        return _clients.size() + _clientsBuff.size();
    }

    void setEventObj(INetEvent* event)
    {
        _pNetEvent = event;
    }

private:
    SOCKET _sock;
    //正式客户队列
    //std::vector<ClientSocket*> _clients;
    std::map<SOCKET, ClientSocket*> _clients;
    //缓冲客户队列
    std::vector<ClientSocket*> _clientsBuff;
    //缓冲客户端队列的锁
    std::mutex _mutex;
    std::thread _pThread;
    char _szRecv[RECV_BUFF_SIZE] = { };
private:
    //网络事件对象
    INetEvent* _pNetEvent;
};


class EasyTcpServer:public INetEvent
{
public:
    EasyTcpServer()
    {
        _sock = INVALID_SOCKET;
        _clientCount = 0;
        _recvCount = 0;
    }

    virtual ~EasyTcpServer()
    {
        Close();
    }

    //初始化socket
    SOCKET InitSocket()
    {
#ifdef _WIN32
        WORD ver = MAKEWORD(2, 2);
        WSADATA dat;
        WSAStartup(ver, &dat);
#endif // _WIN32

        if (_sock != INVALID_SOCKET)
        {
            Close();
        }

        _sock = socket(AF_INET, SOCK_STREAM, 0);
        if (INVALID_SOCKET == _sock)
        {
            printf("错误，建立Socket失败...\n");
        }
        else
        {
            printf("建立Socket成功...\n");
        }

        return _sock;
    }

    //绑定端口号
    int Bind(const char* ip, unsigned short port)
    {
        sockaddr_in _sin = {};
        _sin.sin_family = AF_INET;
        _sin.sin_port = htons(4567);//host to net unsigned short

                                    //使用127.0.0.1可以防止外网访问
                                    //启用本机全部的ip地址可以使用，INADDR_ANY

#ifdef _WIN32
        if (ip)
        {
            _sin.sin_addr.S_un.S_addr = inet_addr(ip);
        }
        else
        {
            _sin.sin_addr.S_un.S_addr = INADDR_ANY;
        }

#else
        if (ip)
        {
            _sin.sin_addr.s_addr = inet_addr(ip);
        }
        else
        {
            _sin.sin_addr.s_addr = INADDR_ANY;
        }

#endif

        int ret = bind(_sock, (sockaddr*)&_sin, sizeof(sockaddr_in));
        if (SOCKET_ERROR == ret)
        {
            printf("错误，绑定网络端口失败...\n");
        }
        else
        {
            printf("绑定网络端口成功...\n");
        }

        return ret;
    }

    //监听端口号
    int Listen(int cnt)
    {
        int ret = listen(_sock, cnt);
        if (SOCKET_ERROR == ret)
        {
            printf("错误，监听网络端口失败...\n");
        }
        else
        {
            printf("监听网络端口成功...\n");
        }

        return ret;
    }

    //接收客户端连接
    int Accept()
    {
        sockaddr_in clientAddr = {};
        int nAddrLen = sizeof(clientAddr);
        SOCKET _cSock = INVALID_SOCKET;
#ifdef _WIN32
        _cSock = accept(_sock, (sockaddr*)&clientAddr, &nAddrLen);
#else
        _cSock = accept(_sock, (sockaddr*)&clientAddr, (socklen_t*)&nAddrLen);
#endif
        if (INVALID_SOCKET == _cSock)
        {
            printf("错误，接受到无效客户端socket...\n");
        }
        else
        {

            //NewUserJoin msg;
            //msg.sock = _cSock;
            //Send2All(&msg);
            //_clients.push_back(new ClientSocket(_cSock));
            //将新客户端分配给客户端数量最少的cellServer
            addClientToCellServer(new ClientSocket(_cSock));

            //printf("new user join in:socket=%d,IP=%s,count=%d\n", _cSock, inet_ntoa(clientAddr.sin_addr), _clients.size());
        }

        return _cSock;
    }

    void Start(int nCellServer)
    {
        for (int n=0; n<nCellServer; n++)
        {
            auto ser = new CellServer(_sock);
            _cellServers.push_back(ser);
            //注册网络事件接收对象
            ser->setEventObj(this);
            //启动消息处理线程
            ser->Start();
        }
    }

    //关闭socket
    void Close()
    {

        if (_sock != INVALID_SOCKET)
        {
#ifdef _WIN32

            closesocket(_sock);
            //清除Windows socket环境
            WSACleanup();
#else
            close(_sock);
#endif

            _sock = INVALID_SOCKET;
        }

    }

    void addClientToCellServer(ClientSocket*  pClient)
    {
        OnNetJoin(pClient);

        //查找客户数量最少的CellServer消息处理对象
        auto pMinServer = _cellServers[0];
        for (auto pCellServer : _cellServers)
        {
            if (pCellServer->getClientCount() < pMinServer->getClientCount())
            {
                pMinServer = pCellServer;
            }
            
        }

        pMinServer->addClient(pClient);
    }

    //处理网络消息
    bool OnRun()
    {
        if (!isRun())
        {
            return false;
        }

        time4msg();

        fd_set fdRead;
        //fd_set fdWrite;
        //fd_set fdExp;

        FD_ZERO(&fdRead);
        //FD_ZERO(&fdWrite);
        //FD_ZERO(&fdExp);

        FD_SET(_sock, &fdRead);
        //FD_SET(_sock, &fdWrite);
        //FD_SET(_sock, &fdExp);

        SOCKET maxSock = _sock;

        timeval t = {0, 10};
        //int ret = select(maxSock + 1, &fdRead, &fdWrite, &fdExp, &t);
        int ret = select(maxSock + 1, &fdRead, 0, 0, &t);
        if (ret < 0)
        {
            printf("select任务结束。\n");
            Close();
            return false;
        }


        if (FD_ISSET(_sock, &fdRead))
        {
            FD_CLR(_sock, &fdRead);//从集合移除了_sock

            Accept();
        }

        return true;
    }

    //是否工作中
    bool isRun()
    {
        return _sock != INVALID_SOCKET;
    }

    //计算每秒钟收到了多少网络消息
    void time4msg()
    {
        
        auto t1 =  _tTime.getElapsedTimeInSec();
        if (t1 > 1.0)
        {
            printf("time:%lf,sock:%d,clients:%d,recv count:%d\n", t1, _sock, _clientCount, (int)(_recvCount/t1));
            _recvCount = 0;
            _tTime.update();
        }
        
    }

    //void Send2All(DataHeader* header)
    //{
    //    if (isRun() && header)
    //    {
    //        for (int n = (int)_clients.size() - 1; n >= 0; n--)
    //        {
    //            SendData(_clients[n]->sockfd(), header);
    //        }
    //    }

    //}

    virtual void OnNetJoin(ClientSocket* pClient)
    {
        _clientCount++;
    }

    virtual void OnNetLeave(ClientSocket* pClient)
    {
        _clientCount--;
    }

    virtual void OnNetMsg(ClientSocket* pClient, DataHeader* header)
    {
        _recvCount++;
    }

private:
    SOCKET _sock;
    //消息处理对象，内部会创建线程
    std::vector<CellServer*> _cellServers;
    CELLTimestamp _tTime;

protected:
    std::atomic<int> _clientCount;
    //收到消息计数
    std::atomic<int> _recvCount;
};

#endif

 

main.cpp

#include "EasyTcpServer.hpp"

#include <thread>

bool g_bRun = true;

void cmdThread()
{
    while (true)
    {
        //3输入请求命令
        char cmdBuf[128] = {};
        scanf("%s", cmdBuf);
        getchar();
        //4处理请求
        if (0 == strcmp(cmdBuf, "exit"))
        {
            printf("退出cmdThread线程\n");
            g_bRun = false;
            return;
        }
        else
        {
            printf("wrong cmd, please input cmd again.\n");
        }
    }
}


class MyServer : public EasyTcpServer
{
public:

    //只会被一个线程触发 安全
    virtual void OnNetJoin(ClientSocket* pClient)
    {
        _clientCount++;
        //printf("client<%d> join\n", pClient->sockfd());
    }
    //cellServer 4 多个线程触发 不安全
    //如果只开启1个cellServer就是安全的
    virtual void OnNetLeave(ClientSocket* pClient)
    {
        _clientCount--;
        //printf("client<%d> leave\n", pClient->sockfd());
    }
    //cellServer 4 多个线程触发 不安全
    //如果只开启1个cellServer就是安全的
    virtual void OnNetMsg(ClientSocket* pClient, DataHeader* header)
    {
        _recvCount++;
        switch (header->cmd)
        {
        case CMD_LOGIN:
        {

            Login* login = (Login*)header;
            //printf("收到客户端<Socket=%d>请求：CMD_LOGIN,数据长度：%d,userName=%s PassWord=%s\n", cSock, login->dataLength, login->userName, login->PassWord);
            //忽略判断用户密码是否正确的过程
            //LoginResult ret;
            //pClient->SendData(&ret);
        }
        break;
        case CMD_LOGOUT:
        {
            LogOut* logout = (LogOut*)header;
            //printf("收到客户端<Socket=%d>请求：CMD_LOGOUT,数据长度：%d,userName=%s \n", cSock, logout->dataLength, logout->userName);
            //忽略判断用户密码是否正确的过程
            //LogoutResult ret;
            //SendData(cSock, &ret);
        }
        break;
        default:
        {
            printf("<socket=%d>收到未定义消息,数据长度：%d\n", pClient->sockfd(), header->dataLength);
            //DataHeader ret;
            //SendData(cSock, &ret);
        }
        break;
        }
    }
private:

};


int main()
{

    MyServer  server;
    server.InitSocket();
    server.Bind(nullptr, 4567);
    server.Listen(5);
    //创建4个线程，收发客户端消息
    server.Start(4);

    std::thread t(cmdThread);
    t.detach();

    while (g_bRun)
    {
        server.OnRun();
    }

    server.Close();
    printf("已退出。\n");
    getchar();
    return 0;
}