Question

我有许多读取xml文件的服务。为了确保没有冲突，我使用互斥锁。无论出于何种原因，如果我的所有服务都由同一个用户运行，则没有问题。但是，如果有不同的用户运行这些服务，即使一个服务释放了互斥锁，另一个服务在调用enter route mutex时会出现以下异常“Unhandled Exception：System.TypeInitializationException：'createMutex.Program'的类型初始值设定项引发了exception。---＆gt; System.UnauthorizedAccessException：拒绝访问路径'RETEST_MUTEX'。“

    public static readonly String ROUTE_MUTEX_STRING = "RETEST_MUTEX";
    private static Mutex _routeMutex = new Mutex(false, ROUTE_MUTEX_STRING);

    /// <summary>
    /// Thin wrapper around the static routeMutex WaitOne method
    /// Always call ExitRouteMutex when done in protected area
    /// </summary>
    /// <param name="millis_timeout"></param>
    /// <returns>true if signaled, like WaitOne</returns>
    public static bool EnterRouteMutex(int millis_timeout)
    {
        try
        {
            return _routeMutex.WaitOne(millis_timeout, false);
        }
        catch (AbandonedMutexException ame)
        {
            // swallow this exception - don't want to depend on other apps being healthy - like pre .NET 2.0 behavior
            // data integrity will be checked
            return _routeMutex.WaitOne(millis_timeout, false);
        }

    }

    public static void ExitRouteMutex()
    {
        try
        {
            _routeMutex.ReleaseMutex();
        }
        catch (ApplicationException)
        {
            // swallow, reduce complexity to client
        }
    }

    static void Main(string[] args)
    {
        Console.WriteLine("Start");
        bool get = EnterRouteMutex(1000);
        System.Console.WriteLine("Mutex created Press enter " + get.ToString());
        Console.ReadLine();            
        ExitRouteMutex();
        Console.WriteLine("Mutex Release");
        System.Console.WriteLine("Press enter");
        Console.ReadLine();
    }

Answer 1

以下是执行跨进程互斥锁的示例。

http://msdn.microsoft.com/en-us/library/c41ybyt3.aspx

它处理Mutex.OpenExisting的使用，并演示了cdhowie提到的安全方面。

即使我发布它后，Mutex似乎也不会释放

1 个答案: