Threading

[rakesh_nits]

I am using file watcher and a timer in a windows service and i want that timer_elapsed function should be called only when any file sytem watcher event is not working.i think it can be done using threading if i will assign lowest priority to the timer_elapsed thread.but i am not able to do it. can anybody can tell me how to do it in C#.

[Guffa]

I would use something as simple as a static variable as a counter. Increase the counter when a watcher event starts, and decrese it when it ends. Check the counter in the timer, and only do anything if the counter is zero. --- b { font-weight: normal; }

[Andy Brummer]

In C# the easiest way to accomplish this is to use a lock on an object.

 private static object sLock = new object();

 private void Timer\_elapsed(object source, EventArgs e)
 {
    lock (sLock)
    {
       //Timer code here.
    }
 }

 private void FileWatcher\_event(object source, EventArgs e)
 {
    lock (sLock)
    {
       //File code here.
    }
 }

any code in the lock blocks is protected from multiple threads accessing it at the same time. I do something similar with the timer that I wrote: http://www.codeproject.com/dotnet/ABTransClockArticle.asp[^]

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