c语言socket多线程编程限制客户端连接数

int main(){    WSADATA wsaData;    WSAStartup(MAKEWORD(2, 2), &wsaData);    HANDLE threads[MAXCLIENTS];

    SOCKET s=socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);

    sockaddr_in sockaddr;    sockaddr.sin_family=PF_INET;    sockaddr.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");    sockaddr.sin_port=htons(9000);    bind(s, (SOCKADDR*)&sockaddr, sizeof(SOCKADDR));

    listen(s, 1);

    printf("listening on port [%d].\n", 9000);

    int existingClientCount=0;    while(TRUE)    {        SOCKADDR clientAddr;        int size=sizeof(SOCKADDR);

        SOCKET clientsocket;        clientsocket=accept(s, &clientAddr, &size);        printf("***SYS***    New client touched.\n");

        if(existingClientCount<MAXCLIENTS)       //判断是否已经超出最大连接数了        {            threads[existingClientCount++]=CreateThread(NULL, 0, ProcessClientRequests, &clientsocket, 0, NULL);  //启动新线程，并且将socket传入        }        else        {            char* msg="Exceeded Max incoming requests, will refused this connect!\r\n";            send(clientsocket, msg, strlen(msg)+sizeof(char), NULL);       //发送拒绝连接消息给客户端            printf("***SYS***    REFUSED.\n");            closesocket(clientsocket);                                     //释放资源            break;        }    }

    printf("Maximize clients occurred for d%.\r\n", MAXCLIENTS);

    WaitForMultipleObjects(MAXCLIENTS, threads, TRUE, INFINITE);           //等待所有子线程，直到完成为止

    closesocket(s);    for(int i=0;i<MAXCLIENTS; i++)    {        CloseHandle(threads[i]);                                           //清理线程资源    }    WSACleanup();

    printf("Cleared all.\r\n");

    getchar();

    exit(0);}