Hello, I've made a thread_safe_ptr class available at http://codepad.org/PxDEGaFm The idea is to use it like so: std::string data = "Hello world;"; thread_safe_ptr<std::string> data_ptr(&data); void thread1() { data_ptr->resize(3); } void thread2() { *data_ptr = "yeah"; } boost::thread t1(&thread1); boost::thread t2(&thread1); t1.join(); t2.join(); Do you see an obvious show-stopper for me not to continue developping this class? What's still to be done is worry about ownership of objects, my idea is to eventually somewhat model it after boost::shared_ptr that way it's easier to pass those around. When I'll be satisfied with the result, my plan is to "boostify" it (namespaces, license etc) and maybe propose it for inclusion in the smart pointer library. What are your thoughts? Philippe