由于AcceptSocket，Thread.Abort似乎没有抛出ThreadAbortException

Question

我在下面的线程上调用ChannelServer.ListeningThread.Abort ，但似乎没有任何事情发生。 我想更具体一点，但我想不出更多。 似乎没有抛出ThreadAbortException ，并且无论阻塞侦听器如何都应抛出此异常（它在阻塞接收的线程上完美运行）。

重要编辑 ：使用ManualResetEvent.WaitOne而不是AcceptSocket ，正如Lyrik建议进行测试一样，它完美无缺。 为什么AcceptSocket阻止ThreadAbortException ？

链接 ：这个论坛主题似乎讨论了同样的问题，虽然我无法解决任何问题： 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

这里有一个简单的AcceptSocket2扩展方法（对于名称缺乏想象力而感到抱歉......）。 它与原始的AcceptSocket方法完全一样。

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

我不确定你为什么会收到这个错误，但这是一个简单的例子：

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();

所以它适用于我...我假设你已经通过调试器并且你的catch语句中的断点没有被击中，这是正确的吗？

注意：调用Abort是不好的做法，而应该调用Interrupt并处理ThreadInterruptedException ...它更安全。

Answer 3

这很有效，但它非常邋and和线程浪费。 任何人都可以指出一种方法来抛出“AcceptSocket”不会自动捕获的异常吗？

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();