Re: [Mono-list] Dispose method is never called

Mon, 07 Jul 2003 09:45:29 -0700

Please someone correct me if I am wrong,
 
What I believe you created is a finalizer.  Dispose is implemented as a method you call on the object to clean up resources. The finalizer is not called until the object is actually garbage collected. So it could sit in memory for an undetermined amount of time before the finalizer is called. (after writing this and reading two more times, Gonzalo does have a point)
 
The IDispose interface is used to be able to clear up resources without necessarily being garbage collected right away.
 
Here are some articles on MSDN:
 
This article is particularly good...
 
Now I may be off base at what's being asked, but In general if you follow the linked articles, it generally should work.
 
Richard Norman
Web/Application Developer
 
El dom, 06-07-2003 a las 17:20, Giuseppe Greco escribi=:
> Hi all,
>
> I've a class that starts a worker thread like
> this:
>
> class MyClass
> {
>   bool isDisposed = false;
>   Thread myThread;
>
>   public MyClass()
>   {
>       ...
>       myThread = new Thread(new ThreadStart(MyThreadMethod));
>       myThread.Start();
>       myThread.IsBackground = true;
>    }
>
>   ~MyClass()
>   {
>     Dispose(false)
>   }
>
>   public void Dispose()
>   {
>     Dispose(true);
>     GC.SuppressFinalize(this);
>   }
>
>   protected virtual void Dispose(bool disposing)
>   {
>     if (!isDisposed) {
>       isDisposed = true;
>
>       myThread.Join(); // should wait until MyThreadMethod()
>                        // completes its work...
>       myThread = null;
>                                                                 
>       if (disposing) {
>         ...
>       }
>     }
>   }
>
>   private void MyThreadMethod()
>   {
>     while (!isDisposed) {
>       ...
>     {
>   }
> }
>
> Well, in the class above, the Dispose() method is never
> called. This is a problem if one needs to wait until the
> thread has finished its work -- Thread.Join() should block
> until then.
>
> The destructor -- ~MyClass() -- is never called.
 
Is it called under windows? I think it's not because MyThreadMethod is
accessing isDisposed field, which belongs to the class instance. That's
why it's never disposed.
 
-Gonzalo
 

 

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