<map id="Graphical Class Hierarchy" name="Graphical Class Hierarchy"> <area shape="rect" id="node1" href="$a02768.html" title="A shared mutex type implemented using std::condition_variable." alt="" coords="5,5,160,31"/> <area shape="rect" id="node2" href="$a02772.html" title="The standard shared timed mutex type." alt="" coords="208,5,367,31"/> </map>