c++ - 异步 winsock 服务器包装器，CPU 滞后 - C++

Question

我正在尝试编写一个服务器应用程序包装器，就像我对任何应用程序所做的那样，并且我已经搜索了一个多星期的时间来寻找关于异步套接字的至少体面的指南或教程(这个包装器必须是异步的)，到目前为止我能做的是:

#ifndef _SERVER_H
#define _SERVER_H

#include "asynserv.h" // header file with the important lib includes
#include <map>

namespace Connections
{
    DWORD WINAPI MainThread(LPVOID lParam); // Main thread
    DWORD WINAPI DataThread(LPVOID lParam); // thread that will be created for each client
    struct ClientServer // struct to keep a server and a client pair.
    {
    public:
        struct Client* Client;
        class Server* Server;
    };
    struct Client // a struct wrapper to keep clients
    {
    public:
        Client(SOCKET Connection, int BufferSize, UINT ID);
        ~Client();
        SOCKET WorkerSocket;
        char Buffer[255];
        bool Connected;
        int RecvSize;
        UINT UID;
        void Send(char * Data);
        void Disconnect();
    };
    class Server
    {
    private:
        SOCKET WorkerSocket;
        SOCKADDR_IN EndPnt;
        UINT ID;
        int CBufferSize;
    public:
        Server(int Port, int Backlog, int BufferSize);
        ~Server();
        __event void ClientRecieved(Client* Clientr, char * RecData);
        bool Enabled;
        int Port;
        int Backlog;
        HWND ReqhWnd;
        std::map<UINT, Client*> ClientPool;
        void WaitForConnections(Server*);
        void WaitForData(Client*);
        void InvokeClientDC(UINT);
        void Startup();
        void Shutdown();
    };
}
#endif

服务器.cpp:

#include "Server.h"

namespace Connections
{
    void Server::Startup()
    {
        WSADATA wsa;
        WSAStartup(0x0202, &wsa);
        this->WorkerSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
        this->EndPnt.sin_addr.s_addr = ADDR_ANY;
        this->EndPnt.sin_family = AF_INET;
        this->EndPnt.sin_port = htons(this->Port);
        this->Enabled = true;
        this->ID = 0;
        bind(this->WorkerSocket, (SOCKADDR*)&this->EndPnt, sizeof(this->EndPnt));
        printf("[AsynServer]Bound..\n");
        listen(this->WorkerSocket, this->Backlog);
                CreateThread(NULL, NULL, &MainThread, this, NULL, NULL);
    }
    void Server::WaitForConnections(Server * Ser)
    {
        WSAEVENT Handler = WSA_INVALID_EVENT;
        while(Ser->Enabled)
        {
            Handler = WSACreateEvent();
            WSAEventSelect(Ser->WorkerSocket, Handler, FD_ACCEPT);
            WaitForSingleObject(Handler, INFINITE);
            SOCKET accptsock = accept(Ser->WorkerSocket, NULL, NULL);
            Client * NewClient = new Client(accptsock, 255, Ser->ID++);
            NewClient->Connected = true;
            printf("[AsynServer]Client connected.\n");
            ClientServer * OurStruct = new ClientServer();
            OurStruct->Server = Ser;
            OurStruct->Client = NewClient;
            CreateThread(NULL, NULL, &DataThread, OurStruct, NULL, NULL);
        }
    }
    void Server::WaitForData(Client * RClient)
    {
        WSAEVENT Tem = WSA_INVALID_EVENT;
        Tem = WSACreateEvent();
        WSAEventSelect(RClient->WorkerSocket, Tem, FD_READ);
        while(RClient->Connected)
        {
            WaitForSingleObject(Tem, INFINITE);
            RClient->RecvSize = recv(RClient->WorkerSocket, RClient->Buffer, 255, NULL);
            if(RClient->RecvSize > 0)
            {
                RClient->Buffer[RClient->RecvSize] = '\0';
                __raise this->ClientRecieved(RClient, RClient->Buffer);
                Sleep(50);
            }
        }
        return;
    }
    DWORD WINAPI MainThread(LPVOID lParam)
    {
        ((Server*)lParam)->WaitForConnections((Server*)lParam);
        return 0;
    }
    DWORD WINAPI DataThread(LPVOID lParam)
    {
        ClientServer * Sta = ((ClientServer*)lParam);
        Sta->Server->WaitForData(Sta->Client);
        return 0;
    }
}

现在在创建服务器实例和创建主线程后，我可以同时接受客户端并读取他们发送的数据，但是在两个连接之后我的 CPU 滞后到 100% 使用率..我想我的方法不正确，所以我的问题是有人可以指出我的代码中可能存在的缺陷，或者只是指出一个不错的异步套接字指南，前提是我已经搜索了一个多星期但没有结果(可能是我的绝望阻碍了我选择正确的关键字 :| )。提前致谢，并对大量代码感到抱歉，在允许的情况下对其进行了修剪。

制造商，简单但完美。

Answer 1

第一个错误:在 Server::WaitForConnections 中，每次执行 while 循环时都会创建 HEVENT (Handler = WSACreateEvent()) 而不会破坏它。将 HEVENT 创建移到 while 循环之外。

第二个错误:你的缓冲区是 255 长(字符)但是你这样做:RClient->Buffer[RClient->RecvSize] = '\0';其中 RClient->RecvSize 可以是缓冲区大小的精确值——这意味着您创建了一个类“缓冲区溢出”。

希望对您有所帮助。多米尼克