# File tokyotyrant.rb, line 771
    def size()
      if !@sock
        @ecode = EINVALID
        return 0
      end
      sbuf = [0xC8, 0x81].pack("CC")
      if !_send(sbuf)
        @ecode = ESEND
        return 0
      end
      code = _recvcode
      if code == -1
        @ecode = ERECV
        return 0
      end
      if code != 0
        @ecode = EMISC
        return 0
      end
      rv = _recvint64
      if rv < 0
        @ecode = ERECV
        return 0
      end
      return rv
    end