class DRb::ThreadObject

def method_missing(msg, *arg, &blk)
  synchronize do
    @wait_ev.wait_until { @status == :wait }
    @req = [msg] + arg
    @status = :req
    @req_ev.broadcast
    @res_ev.wait_until { @status == :res }
    value = @res
    @req = @res = nil
    @status = :wait
    @wait_ev.broadcast
    return value
  end
end