414   // An upper bound on the number of live bytes in the region.

   414   // An upper bound on the number of live bytes in the region.

   415   size_t max_live_bytes() { return used() - garbage_bytes(); }

   415   size_t max_live_bytes() { return used() - garbage_bytes(); }

   416 

   416 

   417   void add_to_marked_bytes(size_t incr_bytes) {

   417   void add_to_marked_bytes(size_t incr_bytes) {

   418     _next_marked_bytes = _next_marked_bytes + incr_bytes;

   418     _next_marked_bytes = _next_marked_bytes + incr_bytes;

   420   }

   420   }

   421 

   421 

   422   void zero_marked_bytes()      {

   422   void zero_marked_bytes()      {

   423     _prev_marked_bytes = _next_marked_bytes = 0;

   423     _prev_marked_bytes = _next_marked_bytes = 0;

   424   }

   424   }