线程和多线程问题 [英] Threads and Multi-Threads issue

问题描述

我正在构建一个用于扫描IP地址的程序.我建立了一个检查

端口的类

给定的IP地址.我将此类作为线程循环运行.我显然阻止了

的数量 可以并行运行的

线程.问题在于线程总是返回退出

代码:259，大约半分钟后，程序挂起.

我试图在google，论坛和代码259的含义中进行搜索.所以我发现了一些

认为它只返回不表示任何含义的代码.在其他论坛上，我看到的是

表示使用大量内存存在问题.所以我尝试在

中仅使用2个线程

平行.它仍然无法正常工作.我尝试查看使用线程的另一种方法，所以我读了

关于线程池，我将代码更改为使用线程池，但仍然无法正常工作.的

当然要确保在课堂上我不使用全局变量.

代码:

   private void Get_Port_With_Status_Thread_Inventer()
    {

        for (int Thread_Cnt_Get_Port_N_Status = 1; Thread_Cnt_Get_Port_N_Status < IP_Address.Length + 1; Thread_Cnt_Get_Port_N_Status++)
        {

            if (Open_Threads_Port_N_Status_Counter >= Max_Thread_Allowed)
            {
               Thread_Cnt_Get_Port_N_Status--;
               continue;
            }

            Thread New_Port_N_Status_Thread = new Thread(new ParameterizedThreadStart(Get_Port_With_Status_Thread));
            New_Port_N_Status_Thread.Start(Thread_Cnt_Get_Port_N_Status);

            Open_Threads_Port_N_Status_Counter++;
        }

        End_Get_Port_N_Status_Inventer = true;
    }

   private void Get_Port_With_Status_Thread(object Index_On_Array_Obj)
    {

        int Index_On_Array = (int)Index_On_Array_Obj;

        string IP_Address_Str = IP_Address[Index_On_Array - 1];


        IPEndPoint IP_Address_Connect_Data_Base = new IPEndPoint(IPAddress.Parse(IP_Address_Str), 80);

        Socket Socket_IP_Address_Connect_Data_Base = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

        string Ports_Rep_Index = 80.ToString();

        DateTime Current_New_Now_Seconds = DateTime.Now.Date;

        try
        {
            Socket_IP_Address_Connect_Data_Base.Connect(IP_Address_Connect_Data_Base);
            Socket_IP_Address_Connect_Data_Base.Disconnect(true);

            IP_Port[Index_On_Array - 1] = "Port 80 - Live";
        }

        catch (SocketException g)
        {
            IP_Port[Index_On_Array - 1] = "Port 80 - Dead";
        }

        Open_Threads_Port_N_Status_Counter--;
    }

解决方案

解决方案很简单.不要使用debugger运行多个线程，所以如果您有Microsoft

Visual Studio，您想运行很多线程，在没有调试器的情况下运行程序！

I'm building a program for scanning IP addresses. I built a class that checks the ports of

a given IP address. I run this class in loop as thread. I obviously blocking the amount of

thread that can be run in parallel. The problem is that always the thread returns an exit

code: 259, and after half a minute or so, the program hangs.

I tried to search in google, forums, and here what the code 259 means. So i found in some

forums that it simply return code that not meaning any thing. In other forums i see that is

means that there a problem with using a lot of memory. So i try to use only 2 threads in

paralel. It still doesnt work. I try to see another methods to work with threads, so i read

about threads pool, i change the code to use threads pool, but it still not work. I of

course made sure that in class i dont use global variableas.

Code :

   private void Get_Port_With_Status_Thread_Inventer()
    {

        for (int Thread_Cnt_Get_Port_N_Status = 1; Thread_Cnt_Get_Port_N_Status < IP_Address.Length + 1; Thread_Cnt_Get_Port_N_Status++)
        {

            if (Open_Threads_Port_N_Status_Counter >= Max_Thread_Allowed)
            {
               Thread_Cnt_Get_Port_N_Status--;
               continue;
            }

            Thread New_Port_N_Status_Thread = new Thread(new ParameterizedThreadStart(Get_Port_With_Status_Thread));
            New_Port_N_Status_Thread.Start(Thread_Cnt_Get_Port_N_Status);

            Open_Threads_Port_N_Status_Counter++;
        }

        End_Get_Port_N_Status_Inventer = true;
    }

   private void Get_Port_With_Status_Thread(object Index_On_Array_Obj)
    {

        int Index_On_Array = (int)Index_On_Array_Obj;

        string IP_Address_Str = IP_Address[Index_On_Array - 1];


        IPEndPoint IP_Address_Connect_Data_Base = new IPEndPoint(IPAddress.Parse(IP_Address_Str), 80);

        Socket Socket_IP_Address_Connect_Data_Base = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

        string Ports_Rep_Index = 80.ToString();

        DateTime Current_New_Now_Seconds = DateTime.Now.Date;

        try
        {
            Socket_IP_Address_Connect_Data_Base.Connect(IP_Address_Connect_Data_Base);
            Socket_IP_Address_Connect_Data_Base.Disconnect(true);

            IP_Port[Index_On_Array - 1] = "Port 80 - Live";
        }

        catch (SocketException g)
        {
            IP_Port[Index_On_Array - 1] = "Port 80 - Dead";
        }

        Open_Threads_Port_N_Status_Counter--;
    }

解决方案

The solution was simply . Dont run multiple threads with debugger , so if you have Microsoft

Visual Studio and you want run a lot of threads , run the program without the debugger !

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