由於AcceptSocket，Thread.Abort似乎沒有拋出ThreadAbortException

Question

我在下面的線程上調用ChannelServer.ListeningThread.Abort ，但似乎沒有任何事情發生。 我想更具體一點，但我想不出更多。 似乎沒有拋出ThreadAbortException ，並且無論阻塞偵聽器如何都應拋出此異常（它在阻塞接收的線程上完美運行）。

重要編輯 ：使用ManualResetEvent.WaitOne而不是AcceptSocket ，正如Lyrik建議進行測試一樣，它完美無缺。 為什么AcceptSocket阻止ThreadAbortException ？

鏈接 ：這個論壇主題似乎討論了同樣的問題，雖然我無法解決任何問題： http ： //www.tek-tips.com/viewthread.cfm？qid = 319436＆page = 413

ChannelServer.ListeningThread = new Thread(new ThreadStart(delegate()
{
    Log.Inform("Waiting for clients on thread {0}.", Thread.CurrentThread.ManagedThreadId);

    while (true)
    {
        try
        {
            new Thread(new ParameterizedThreadStart(ChannelClientHandler.Initialize)).Start(ChannelServer.Listener.AcceptSocket());
        }
        catch (ThreadAbortException)
        {
            Log.Inform("Aborted client listening thread {0}.", Thread.CurrentThread.ManagedThreadId);
            break;
        }
    }
}));
ChannelServer.ListeningThread.Start();

Answer 1

這里有一個簡單的AcceptSocket2擴展方法（對於名稱缺乏想象力而感到抱歉......）。 它與原始的AcceptSocket方法完全一樣。

using System;
using System.Net.Sockets;
using System.Threading;

/// <summary>
/// Extensions to TcpListener
/// </summary>
public static class TcpListenerExtensions
{
    /// <summary>
    /// Accepts a pending connection request.
    /// </summary>
    /// <param name="tcpListener">The TCP listener.</param>
    /// <returns>
    /// A <see cref="T:System.Net.Sockets.Socket" /> used to send and receive data.
    /// </returns>
    /// <exception cref="T:System.InvalidOperationException">The listener has not been started with a call to <see cref="M:System.Net.Sockets.TcpListener.Start" />.</exception>
    /// <PermissionSet><IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" /><IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" /><IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence" /><IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" /></PermissionSet>
    public static Socket AcceptSocket2(this TcpListener tcpListener)
    {
        Socket socket = null;
        var clientConnected = new ManualResetEvent(false);
        clientConnected.Reset();
        tcpListener.BeginAcceptSocket(delegate(IAsyncResult asyncResult)
        {
            try
            {
                socket = tcpListener.EndAcceptSocket(asyncResult);
            }
            catch (ObjectDisposedException)
            { }
            clientConnected.Set();
        }, null);
        clientConnected.WaitOne();
        return socket;
    }
}

Answer 2

我不確定你為什么會收到這個錯誤，但這是一個簡單的例子：

ManualResetEvent mrse = new ManualResetEvent(false);
Thread test = new Thread(() =>
    {
        while (true)
        {
            try
            {
                mrse.WaitOne();
            }
            catch (ThreadAbortException)
            {
                Console.WriteLine("No problem here...");
            }
        }
    });

test.IsBackground = true;
test.Start();

Thread.Sleep(1000);
test.Abort();
Console.ReadKey();

所以它適用於我...我假設你已經通過調試器並且你的catch語句中的斷點沒有被擊中，這是正確的嗎？

注意：調用Abort是不好的做法，而應該調用Interrupt並處理ThreadInterruptedException ...它更安全。

Answer 3

這很有效，但它非常邋and和線程浪費。 任何人都可以指出一種方法來拋出“AcceptSocket”不會自動捕獲的異常嗎？

ChannelServer.ListeningThread = new Thread(new ThreadStart(delegate()
{
    Log.Inform("Waiting for clients on thread {0}.", Thread.CurrentThread.ManagedThreadId);

    while (true)
    {
        try
        {
            ChannelServer.ClientConnected.Reset();
            ChannelServer.Listener.BeginAcceptSocket(new AsyncCallback(ChannelClientHandler.EndAcceptSocket), ChannelServer.Listener);
            ChannelServer.ClientConnected.WaitOne();
        }
        catch (ThreadInterruptedException)
        {
            Log.Inform("Interrupted client listening thread {0}.", Thread.CurrentThread.ManagedThreadId);
            break;
        }
    }
}));
ChannelServer.ListeningThread.Start();