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POIs Thread.Sleep the proper way to implement my own Timer in C#?
 

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  1. POIs Thread.Sleep the proper way to implement my own Timer in C#?
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    <p>I am aware that System.Threading.Timer exists, but I already have a Thread. This thread is supposed to stay alive all the time, but only execute every X seconds. The test implementation looks like this:</p> <pre><code>public class MailClass { private Action&lt;string&gt; LoggerAction; private bool _exit; public MailClass(Action&lt;string&gt; loggerAction) { LoggerAction = loggerAction; } public void Run() { LoggerAction("Run called"); _exit = false; while(!_exit) { Thread.Sleep(TimeSpan.FromSeconds(300)); LoggerAction("Waking up"); } LoggerAction("Run ended"); } public void Stop() { LoggerAction("Stop called"); _exit = true; } } </code></pre> <p>The Run method executes, then sleeps for 5 Minutes, then executes again. So it's basically a timer that fires every 5 Minutes + the time it takes to execute the action. (and yes, I should cache the TimeSpan instead of re-creating it over and over)</p> <p>Is this the proper way to do it? (In the real app, the Run action checks a Web Service, so I have no way to signal my Thread to wake up earlier)</p> <p>Or should I use some other concept to have the thread? One problem I see is the implementation of Stop. The Run Thread runs a loop that checks a bool every time, but if I call Stop() I have to wait until the Sleep Interval is over, which is inconvenient.</p> <p>Thread.Abort would be harsh, so I guess Thread.Interrupt would work somehow? The Stop() Method should allow Run to finish it's current iteration, so no hard abort. AutoResetEvent looks a bit like what I could need, but I don't fully understand what it does.</p> <p><strong>Edit:</strong> One way I would see this possible is to add a Timer (so a separate thread) and then have Run() end not with Thread.Sleep but with some "Wait until some object changes". I would then change that object either from the second Thread (when the 5 minutes expire) or from the Stop action. But that seems excessive? Essentially, Run needs to react to two conditions: 5 Minutes expire <em>or</em> some external signal (like the change of the _exit flag). Something tells me there should be something built-in, but maybe having another Timer Thread solely focused on sending a signal every 5 minutes is the way to go?</p>
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    1. USEli Bendersky
    1. USMichael Stum
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    1. COCan you rephrase what you want in a sentence or two at the end of your article? Your title suggests you want a timer, (which in the C# world is something to measure how long something takes), but I suspect you are coming from the VB world, where a timer means something that wakes up and fires an event?
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    2. COThere is no difference between VB and C# in that sense though: A Timer (System.Threading.Timer) wakes up and fires an Event, a Stopwatch (System.Diagnostics.Stopwatch) measures how long something takes. I want the former.
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      1. USMichael Stum
    3. CO@GalacticJello: You may be thinking of Stopwatch. Timer has tick events that fire off whatever method you want.
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