hi, could lev cooperate with libzmq?

hi, could lev cooperate with libzmq?

My meaning is: if I wrote 

function (c, req, res)
ch = zmq.init(1)
ch:send(msg)
....
ch:recv()  -- this is a blocked call
end

as the callback of web.createServer(),

will this callback block the whole lev process?

Thank you
