# File lib_core/rucy/restart.rb, line 109
    def wait
      # call on parent process
      case (@pin.read(CMD_LEN))
      when RESTART
        @server.restart
      when CLOSE
        @server.close
      end
      @lock.synchronize{
        @pout.close
        @pin.close
        @closed = true
      }
      nil
    end