Subj : Re: Can C++ local static objects be made thread safe?
To   : comp.programming.threads
From : Alexander Terekhov
Date : Wed Feb 16 2005 11:40 am


David Schwartz wrote:
[...]
>     I am saying that. That is what makes them thread local.

The mappings are local. Objects are not.

[...]
>     That's ridiculous. Providing no strictly-conforming code can tell the
> difference, POSIX is silent. And strictly conforming POSIX code can't use
> the '__thread' specifier.

Sure it is extension and no "strictly-conforming code" can use. But 
extensions are not supposed to break the model, only extend it.

> 
>     In any event, many implementations have at least one page that is not
> shared by all the threads. This is a common way to, for example, tell which
> thread you are.

The stuff on those pages isn't addressable by C/POSIX object 
addresses. It's irrelevant implementation detail.

regards,
alexander.

.