Determining if an object has been finalized.

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Phil Jones - 03 Dec 2004 03:14 GMT

Is there a way to determine if an object has been finalized? I figured
you'd ask the GC somehow - but I can't see a method for doing this.

Thanks everyone.
==
Phil

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Joyjit Mukherjee - 03 Dec 2004 04:56 GMT

Hi,

After you call GC.Collect(), the GC calls the finalizers for the object.
From this onwards, we can't predict when the object has completed its
finalization process and the GC had reclaimed it because the process is
InDeterministic.

Any other suggestions welcome.

Thanks
Joyjit

> Is there a way to determine if an object has been finalized? I figured
> you'd ask the GC somehow - but I can't see a method for doing this.
>
> Thanks everyone.
> ==
> Phil

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David Browne - 03 Dec 2004 06:00 GMT

> Is there a way to determine if an object has been finalized? I figured
> you'd ask the GC somehow - but I can't see a method for doing this.

Here's the method to do it:

public static bool HasBeenFinalized(object o)
{
return false;
}

If you have a reference to the object, then it hasn't been finalized
(unless it's been resurected, but that's another story).

David

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Jon Skeet [C# MVP] - 03 Dec 2004 08:53 GMT

> > Is there a way to determine if an object has been finalized? I figured
> > you'd ask the GC somehow - but I can't see a method for doing this.
[quoted text clipped - 8 lines]
> If you have a reference to the object, then it hasn't been finalized
> (unless it's been resurected, but that's another story).

Not true - you could have a reference to it and you're being finalized
as well.

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David Browne - 03 Dec 2004 15:16 GMT

>> > Is there a way to determine if an object has been finalized? I figured
>> > you'd ask the GC somehow - but I can't see a method for doing this.
[quoted text clipped - 11 lines]
> Not true - you could have a reference to it and you're being finalized
> as well.

Aah, which, of course, is probably the only time you would care if another
object has already been finalized.

David

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Phil Jones - 05 Dec 2004 02:22 GMT

Very interesting - thanks guys.

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Mike Blake-Knox - 05 Dec 2004 16:48 GMT

> Aah, which, of course, is probably the only time you would care if another
> object has already been finalized.

Is there another way to obtain a count of the unfinalized (un garbage
collected would be better) instances of a class? (I've inherited some
software that had put finalizers and destructors in place purely so that
performance monitoring counters could be generated.) I removed this when we
started having memory problems.

Thanks

Mike

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David Levine - 05 Dec 2004 23:57 GMT

You would have to do this yourself - the runtime does not track instances,
only whether or not the object is reachable or not.

>> Aah, which, of course, is probably the only time you would care if
>> another
[quoted text clipped - 10 lines]
>
> Mike

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Determining if an object has been finalized.

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