228   }

   228   }

   229 }

   229 }

   230 

   230 

   231 void BFSClosure::do_root(const oop* ref) {

   231 void BFSClosure::do_root(const oop* ref) {

   232   assert(ref != NULL, "invariant");

   232   assert(ref != NULL, "invariant");

   235   if (!_edge_queue->is_full()) {

   233   if (!_edge_queue->is_full()) {

   236     _edge_queue->add(NULL, ref);

   234     _edge_queue->add(NULL, ref);

   237   }

   235   }

   238 }

   236 }