[boost] Re: shared_ptr changes

From: Jonathan Turkanis (technews_at_[hidden])
Date: 2005-03-19 22:29:53

"Peter Dimov" <pdimov_at_[hidden]> wrote in message
news:005501c52b5b$2cfccaf0$6501a8c0_at_pdimov2...
> I've made some pretty extensive changes to the implementation of shared_ptr.
> It now uses a lock-free algorithm (originally invented by Alexander
> Terekhov) on Windows, and the old detail/shared_count.hpp has been
> refactored into a number of smaller headers. A per-count pthread_mutex is
> still being used on non-Windows platforms, but this is also going to change
> soon.
>
> Now is the time to test the new implementation; please report any errors you
> encounter. Some of you have posted patches against the old implementation;
> these will need to be reexamined, too.
>
> detail/lightweight_mutex will also change "soon"; it will just map into a
> CRITICAL_SECTION or a pthread_mutex depending on the platform. The spin
> locks will disappear. shared_ptr no longer uses lightweight_mutex.
>
> If you use some of the undocumented features of shared_ptr -
> BOOST_SP_USE_STD_ALLOCATOR, BOOST_SP_ENABLE_DEBUG_HOOKS, sp_collector.cpp -
> please say so. During the refactoring I may drop some of these features in
> order to simplify and streamline the implementation.
>
> Thanks,
>
> --
> Peter Dimov
> http://www.pdimov.com
>
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