如何在最后一个命令未完成时接收第二个命令？我有一个从消息队列接收命令并处理解析器命令的应用程序。但如果最后一个命令是“start”，它需要一些时间才能完成，如while循环中的1分钟。在同一时间，另一个命令“stop”传入，如何实现？通过线程？

main()
{

    while(true)
    {
        rc = mq_receive(rmqID, rbuff)
        if (rc < 0)
        {
            cout <<"receive timeout !!"<< endl;
        }
        else
        {
            cout <<"receive message : "<< rbuff << endl;
            std::string cmd = rbuff;
            
            if (cmd == "start")
            {           
                cout <<"[receive message] flash_cmd = true"<< endl;
                flash_cmd = true;
            }
            else if (cmd == "stop")
            {           
                cout <<"[receive message] stop command = true"<< endl;
                stop_cmd = true;
            }
            else
            {
                cout <<"[receive message] Command error!"<< endl;
            }
        }

        if (stop_cmd == true)
        {
            cout <<"stop process ......."<< endl;
            stop_flag = true;
        }

        if (flash_cmd == true)
        {
            cout <<"[programming] Start install Processing"<< endl;
            while
            {
              // do flash....
              if(stop_flag == true)
              {
                  break;
              }
            }
        }
}