[Boost-users] [shared_ptr] locking issues in Multithreads and singlethreaded env.

Hi As far as we know, boost::shared_ptr has a locking overhead when inc/dec is invoked. I wonder: 1. Is it using atomic op? 2. Why Alexandrescu policy based shared_ptr was rejected? 3. What can we do in order to be able to use shared_ptr without that overhead? Thanks, Kobi.