Re: [boost] Does lock-free boost::shared_ptr<T> implementation exist?

Subject: Re: [boost] Does lock-free boost::shared_ptr<T> implementation exist?
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2010-07-12 12:11:44

AMDG

Anqing Xu wrote:
> I'm trying to find a production quality lock free reference counted pointer implementation and boost::shared_ptr seems promising.  However boost::atomic_is_lock_free(shared_ptr) returns false on Windows.  I'm going to try on SUSE linux soon. 
>
> According to http://www.boost.org/doc/libs/1_43_0/libs/smart_ptr/shared_ptr.htm, 
>
> Starting with Boost release 1.33.0, shared_ptr uses a
>  lock-free
> 			implementation on the following platforms:
>
> 		
> 			GNU GCC on x86 or x86-64;
> 			
> 			GNU GCC on IA64;
> 			
> 			Metrowerks CodeWarrior on PowerPC;
> 			
> 			GNU GCC on PowerPC;
> 			
> 				Windows.
> Then why does boost::atomic_is_lock_free(shared_ptr) returns false?
>   

atomic_is_lock_free indicates whether atomic operations on the 
shared_ptr object
are lock-free.  The reference count is lock free.

In Christ,
Steven Watanabe