Question

我需要做一些跨过程的同步。

Process B should do some actions only when Process A is running. I tried using Mutex and EventWaitHandles like this :

进程A的主要部分:

EventWaitHandle eventWaitHandle = new EventWaitHandle(true, EventResetMode.ManualReset, "SOMEGUID");

进程B:

private static bool IsProcessARunning(string mutexStr)
{
    try
    {
        EventWaitHandle.OpenExisting(mutexStr);
        return true;
    }
    catch (WaitHandleCannotBeOpenedException e)
    {
        return false;
    }
}

But after process A starts once the IsProcessARunning method will always return true even if process A is closed. Any idea what am I doing wrong here ?

Answer 1

EventWaitHandle.OpenExisting(mutexStr); with EventWaitHandle.OpenExisting(mutexStr).Wait One(-1,false);,以便你可以等待活动。

EDIT:

更改:<代码>EventWaitHandle WaitHandle = 新的事件WaitHandle (true, MattResetMode.ManualReset, “SOMEGUID”);

纽约总部

WaitHandle = 新活动WaitHandle(false, FinalResetMode.ManualReset, “SOMEGUID”);

You must call eventWaitHandle.Set() when starting and eventWaitHandle.Reset() when s纽约总部ping in ProcessA

EDIT:

Because processA might have crashed you should impement System.Diagnostics.Process[] processes = System.Diagnostics.Process.GetProcessesByName(procAName); and check if it is running. If I knew how you will be using this exactly then I could possibly suggest a more appropriate solution. In this case you don t need mutexes.

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