Hi Tomas,

> The comment is a bit misleading as it does not prevent blocking
> really.  The data might be available but the 'read' function might
> still block.

Yes, all those comments regarding non-blocking (also in the way Konrad
used it) mean that during normal operations (i.e. not hanging in an
error condition) everything will go smoothly. It does not mean
"non-blocking" in the technical sense. But for those "normal"
operations, it goes surprisingly well when messages observe the PIPE_BUF
limit. So the *application* is non-blocking, not the underlying
protocol. Without *Run and (poll) the input would always block even on a
single input channel.

Cheers,
- Alex
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