Is there a class in Boost that implements functionality similar to Andrei Alexandrescu's mutex-synchronized LockingPtr as described in his Feb. 2001 CUJ article http://www.cuj.com/documents/s=7998/cujcexp1902alexandr/? I checkout boost::smart_ptr but don't see that any of these deal with interprocess / interthread synchronization. - Regards Chris -- --- Chris Russell, Encapsule Systems, Inc., Yarmouth, Maine USA 04096 http://encapsule.com // http://hyperworx.org // http://chrisrussell.net cdr@encapsule.com // voice (207) 846-7773 // mobile (207) 671-5963 Skype user "encapsule"