[C#][VB.NET].NET 4.0 Barrier Class

Module Module1

Private sync As Barrier

Sub Main(ByVal args() As String)
    sync = New Barrier(3)

    Dim charlie = New Thread(Sub() DriveToBoston("Charlie", TimeSpan.FromSeconds(1)))
    charlie.Start()
    Dim mac = New Thread(Sub() DriveToBoston("Mac", TimeSpan.FromSeconds(2)))
    mac.Start()
    Dim dennis = New Thread(Sub() DriveToBoston("Dennis", TimeSpan.FromSeconds(3)))
    dennis.Start()

    charlie.Join()
    mac.Join()
    dennis.Join()

    Console.ReadKey()
End Sub

Sub DriveToBoston(ByVal name As String, ByVal timeToGasStation As TimeSpan)

    Console.WriteLine("[{0}] Leaving House", name)

    ' Perform some work
    Thread.Sleep(timeToGasStation)
    Console.WriteLine("[{0}] Arrived at Gas Station", name)

    ' Need to sync here
    sync.SignalAndWait()

    ' Perform some more work
    Console.WriteLine("[{0}] Leaving for Gas Station", name)

End Sub

End Module   C# using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading;

namespace BarrierDemo { class Program { static Barrier sync;

    static void Main(string[] args)
    {
        sync = new Barrier(3);

        var charlie = new Thread(() => DriveToBoston("Charlie", TimeSpan.FromSeconds(1))); charlie.Start();
        var mac = new Thread(() => DriveToBoston("Mac", TimeSpan.FromSeconds(2))); mac.Start();
        var dennis = new Thread(() => DriveToBoston("Dennis", TimeSpan.FromSeconds(3))); dennis.Start();

        charlie.Join();
        mac.Join();
        dennis.Join();

        Console.ReadKey();
    }

    static void DriveToBoston(string name, TimeSpan timeToGasStation)
    {
        Console.WriteLine("[{0}] Leaving House", name);

        // Perform some work
        Thread.Sleep(timeToGasStation);
        Console.WriteLine("[{0}] Arrived at Gas Station", name);

        // Need to sync here
        sync.SignalAndWait();

        // Perform some more work
        Console.WriteLine("[{0}] Leaving for Gas Station", name);

    }
}

}  運行結果  若是不使用Barrier去同步，這邊我們可以拿掉sync.SignalAndWait()再做一次運行，則三個人就會變成各自前往西雅圖喝咖啡了。  LinkMSDN - Barrier ClassStackOverFlow - Difference between Barrier in C# 4.0 and WaitHandle in C# 3.0?Managed World - An Intro to Barrier

• VB.NET
• CSharp