class ThreadSafe::Util::Striped64

def expand_table_unless_stale(current_cells)
  try_in_busy do
    if current_cells == cells # Recheck under lock
      new_cells = current_cells.next_in_size_table
      current_cells.each_with_index {|x, i| new_cells.volatile_set(i, x)}
      self.cells = new_cells
    end
  end
end