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how do set a timeout for a method

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情书的邮戳 2020-12-25 15:10

how do set a timeout for a busy method +C#.

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  • 谎友^
    谎友^ (楼主)
    2020-12-25 16:09

    Ok, here's the real answer.

    ...

void LongRunningMethod(object monitorSync)
{
   //do stuff    
   lock (monitorSync) {
     Monitor.Pulse(monitorSync);
   }
}

void ImpatientMethod() {
  Action longMethod = LongRunningMethod;
  object monitorSync = new object();
  bool timedOut;
  lock (monitorSync) {
    longMethod.BeginInvoke(monitorSync, null, null);
    timedOut = !Monitor.Wait(monitorSync, TimeSpan.FromSeconds(30)); // waiting 30 secs
  }
  if (timedOut) {
    // it timed out.
  }
}

   ...



    This combines two of the most fun parts of using C#.  First off, to call the method asynchronously, use a delegate which has the fancy-pants BeginInvoke magic.
    


    Then, use a monitor to send a message from the LongRunningMethod back to the ImpatientMethod to let it know when it's done, or if it hasn't heard from it in a certain amount of time, just give up on it.
    


    (p.s.- Just kidding about this being the real answer.  I know there are 2^9303 ways to skin a cat.  Especially in .Net)
    
    
    
             
    
                                                        
    
            
            
    
              
                
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