Re: [Boost-users] lock-free shared_ptr on solaris

Subject: Re: [Boost-users] lock-free shared_ptr on solaris
From: Frank Meerkötter (frank_at_[hidden])
Date: 2009-09-01 15:29:41

On Tue, 2009-09-01 at 21:51 +0300, Peter Dimov wrote:

Hello Peter,

> > from looking at [1] i understood that there is no lock-free
> > implementation of shared_ptrs on solaris.
> 
> It depends on the compiler and CPU. There are lock-free implementations for 
> g++ on x86/x64 and Sparc. See sp_counted_base.hpp for the details.

I forgot to mention that i am using Sun Studio...

> > When snooping around in the source i noticed that there is a
> > ./smart_ptr/detail/atomic_count_solaris.hpp
> > It is using the solaris specific <atomic.h> to implement an
> > atomic counter.
> >
> > frank_at_dexter:~/boost_1_40_0/boost$ find -type f | xargs grep
> > atomic_count_solaris.hpp
> > ./smart_ptr/detail/atomic_count_solaris.hpp://
> > boost/detail/atomic_count_solaris.hpp
> >
> > But apparently it is not in use. I am currently wondering why?
> 
> I don't remember the exact reason. We probably couldn't figure out a way to 
> reliably detect Solaris. 

Hmm, that is a pity. Do you see any reason why i shouldn't modify my
local copy of boost to use boost/detail/atomic_count_solaris.hpp on sun
studio/solaris?

Thank you for your advice!

KR,
   Frank