Re: [boost] [thread] thread_specific_ptr performance (was: Re: Boostlibrary submission (poll for interest))

Subject: Re: [boost] [thread] thread_specific_ptr performance (was: Re: Boostlibrary submission (poll for interest))
From: Stefan Strasser (strasser_at_[hidden])
Date: 2010-01-08 19:19:58

Am Friday 08 January 2010 20:36:46 schrieb vicente.botet:
> > is there any chance for a thread_specific_ptr implementation based on GCC
> > __thread and MSVC __declspec(thread)?
> >
> > __thread results in a simple read access using a thread-specific memory
> > segment.
>
> Hi,
> As Anthony has already state on other threads this seems to be not posible
> (the semantic is different). 

could you point me towards that thread? the one about dynamically loaded 
libraries?

> What about defining a macro BOOST_LOCAL_THREAD 
> that do the needed portable issues? Have you make some measures with
> __thread and/or MSVC __declspec(thread)?

I'm not sure if you can bring together all the different semantics of those 
extensions using a macro.
the proposal of C++0x thread local storage is about 10 pages:
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2659.htm

>
> BTW, Anthony has made some improvements to which thread_specific_ptr in
> 1.41. Which version are you using?

1.41