Im kinda noob only 2 years of c++ When joining two threads using a recursive_mutex. The recursive_mutex is not shared resulting in dead lock. Is this a "bug" or am i missing something. also what would be a good solution to this? Example code of my problem. ---------------------------------------------------------------------- class Test{ public: boost::recursive_mutex m_mutex; boost::thread* m_thread; bool m_endThread; // start thread Test() : m_endThread( false ) { m_thread = new boost::thread( boost::bind( &Test::threaded, this ) ); } // cleanup virtual ~Test() { boost::recursive_mutex::scoped_lock l( m_mutex ); m_endThread = true; m_thread->join(); //< DEAD LOCK delete m_thread; } // the thread that will block void threaded() { for (;;){ boost::recursive_mutex::scoped_lock l( m_mutex ); //< DEAD LOCK if ( m_endThread ) return; } } }; int main() { Test t; } ----------------------------------------------------------------------