Re: Threadsafe singletons

From:
"Matthias Hofmann" <hofmann@anvil-soft.com>
Newsgroups:
comp.lang.c++.moderated,comp.programming.threads
Date:
2 Aug 2006 11:40:30 -0400
Message-ID:
<44d0c269$0$18515$9b4e6d93@newsread2.arcor-online.net>
"kanze" <kanze@gabi-soft.fr> schrieb im Newsbeitrag
news:1154513641.311594.134690@h48g2000cwc.googlegroups.com...

Strangely, I found no text in the standard that explicitly
guarantees that an object will be initialized before it is
first used... Or maybe I just overlooked it?


No. This guarantee is explicitly not given; there are even
cases where the standard guarantees that the dynamic
initialization will NOT have taken place before the object is
used. (My solution to this problem, with:
    Singleton* Singleton::ourInstance = &Singleton::instance() ;
is an example of code which counts on the function seeing the
zero initialization, before the dynamic initialization has
terminated.)


You mean, you are checking for a null pointer whereever
Singleton::ourInstance is used?

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Matthias Hofmann
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