Re: [boost] [any] new version

Subject: Re: [boost] [any] new version
From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2011-09-05 07:18:26

On 02/09/2011 20:58, Martin Bidlingmaier wrote:
> So there are actually two main issues that need to be taken care of:
>
> - 1. dlls
>    I think a good solution would be to add a new class, e.g. as
>    Andrey Semashev proposed 'local_any', that derives from the current
>    version of any.
>    The normal version could be used for inter dll passing, the new version
>    when the user can assure that a local_any instance won't be passed between
>    dlls.
>    Conversion could be provided from local_any to any.

I don't think Boost libraries should be designed for a single platform.

> - 2. thread safety
>    In c++03, variables defined at namespace scope are not necessarily
>    initialized before main()

Yes they are.

>    , so there could be data races for the
>    previous_id in next_id() in multi threaded applications.

That's not namespace scope, that's function scope.

The C++11 standard (the only one aware of multithreading) mandates that 
initialization of static variables at function scope is thread-safe.