ROUTER: poll() and not just recv() ?

[Theodlz]

Hi!

I've been playing with the router socket and everything has been great so far. However I do have one issue. With the python client of zeromq, I can poll from a router socket like .poll(0), effectively ensuring that I do not wait for a message to come in. I can poll if something is pending and otherwise continue.

However, I can't do that here in rust, at least not to my knowledge.

For context: I'm implementing a job queue with a Router dispatching jobs to workers with dealer sockets.

Thanks!