c# - DotnetCore 1.0.x 中的 TcpListener.BeginAcceptTcpClient I/O 模型是什么

Question

我已经知道 BeginXXX(AMP) 或 XXXAsync(TAP) 在 .NetFramework 中使用 IOCP，那么现在我想在 dotnetcore 上构建 httpServer。所以我需要知道内部机制。

我在 .NetworkFramework 中的旧版本如下代码:

private void continueAccept(TcpListener tcpListener,Action<TcpClient> processConnection)
    {

        //IOCP
        tcpListener.BeginAcceptTcpClient(ar =>
        {

            if (listening)
                continueAccept(tcpListener, processConnection);
            else
                return;

            try
            {

                TcpClient tcpClient = tcpListener.EndAcceptTcpClient(ar);

                acceptCount++;

                tcpClient.SendTimeout = 300000;
                tcpClient.ReceiveTimeout = 300000;

                ConsoleHost1.trace(System.Diagnostics.TraceEventType.Verbose, $"Client Accept { tcpClient.Client.RemoteEndPoint.ToString()}");

                ThreadPool.QueueUserWorkItem((o) => {

                    processConnection((TcpClient)o);

                }, tcpClient);

            }
            catch (Exception e)
            {
                ConsoleHost1.trace(System.Diagnostics.TraceEventType.Error, $"acceptTD:{e.Message}");
            }

        }, null);

    }

    public void startListen(Action<TcpClient> processConnection)
    {

        tcpListener = new TcpListener(IPAddress.Parse("0.0.0.0"), port1);
        tcpListener.Start(maxQueue1);
        listening = true;

        continueAccept(tcpListener, processConnection);

    }

Answer 1

我刚刚解决了。

在 Windows 中:

AcceptAsync 使用 AcceptEx+SocketAsyncEventArgs(IOCP)
BeginAccept 使用 AcceptEx+SafeNativeOverlapped(IOCP)

引用资料来自: https://github.com/dotnet/corefx/blob/release/1.0.0/src/System.Net.Sockets/src/System/Net/Sockets/Socket.Windows.cs https://github.com/dotnet/corefx/blob/release/1.0.0/src/System.Net.Sockets/src/System/Net/Sockets/SocketAsyncEventArgs.Windows.cs

在类 Unix 操作系统中:

AcceptAsync 或 AcceptAsync 在用户模式下使用 Interop.Sys.Accept + ThreadPool。

引用资料来自:https://github.com/dotnet/corefx/blob/release/1.0.0/src/System.Net.Sockets/src/System/Net/Sockets/SocketPal.Unix.cshttps://github.com/dotnet/corefx/blob/release/1.0.0/src/System.Net.Sockets/src/System/Net/Sockets/SocketAsyncContext.Unix.cs