[libuv] Return value from uv_run(l, UV_RUN_NOWAIT)?

[Benjamin Ylvisaker]

I'm curious about the return value from a call to uv_run(l, UV_RUN_NOWAIT). 
 It's pretty clear to me that if there is nothing in the loop at all it 
will return 0.  What I'm not clear on is the situation where there are 
handlers left in the loop, but none of them is ready to go right now.  What 
I would like to write is something like:

    while( events ready to go right now ) {
        uv_run( l, UV_RUN_NOWAIT );
    }

Is this easy/possible?

Thanks,
Ben

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