HeapWord* OneContigSpaceCardGeneration::allocate(size_t word_size,
                                                 bool is_tlab) {

  {- -------------------------------------------
  (1) (assert)
      ---------------------------------------- -}

      assert(!is_tlab, "OneContigSpaceCardGeneration does not support TLAB allocation");

  {- -------------------------------------------
  (1) ContiguousSpace::allocate() で確保を行い, 結果をリターン.
      ---------------------------------------- -}

      return the_space()->allocate(word_size);
    }