Re: strange crush when using template singleton class

From:
"Alexander Grigoriev" <alegr@earthlink.net>
Newsgroups:
microsoft.public.vc.language
Date:
Sat, 17 Mar 2007 21:22:15 -0700
Message-ID:
<u2dbEURaHHA.4692@TK2MSFTNGP04.phx.gbl>
See if that's related to http://support.microsoft.com/kb/887185/

"andrew" <user@earth> wrote in message
news:uYQPZmPaHHA.4940@TK2MSFTNGP05.phx.gbl...

" Yes you will, as per the spec. This is trivially demonstrated, e.g.:"

No, in my opinion, it's not trivial at all to demonstrate if it's true or
not to use that template singleton implementation safely.
The only way is to know exactly what standards the VC++ 2003 compiler
supports.

I have just modified the template singleton class not to use the static
variable inside Instance( ) method.
I allocated it by new.
This requires a Release( ) method added to singleton (which i wanted to
avoid from the first place) but it removed the problems I had.
I had the same strange behaviour even with classes which where not
inherited from the Singleton< > and had their own Instance( ) method with
static variable inside.
After I made all classes to be singletons and have their inner objects
allocated by new, all problems were gone.
At one point It seemed like I had multiple copies of the same object.

I will do some small test application in order to see if the behaviour
with the first implementation can be reproduced.
In the mean while, if you have any other ideas\hints about this please
share.
I find it very inteersting.

thank you

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