id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc 6672,upgrade_lock:: missing constructors from time related types,viboes,viboes,"The constructors {{{ template upgrade_lock(Mutex& mtx, const chrono::time_point& t); template upgrade_lock(Mutex& mtx, const chrono::duration& d); }}} should be added to upgrade_lock to be coherent with unique_lock and shared_lock.",Feature Requests,closed,Boost 1.50.0,thread,Boost 1.49.0,Problem,fixed,,