[epcoa]

> self-socket is much better since you can't select on a pipe.

This needs further explanation. Why can’t you select on a pipe? You certainly can use select/poll on pipes in general and I’m not sure of any reason in particular they won’t work for the self pipe notification.

Its even right in the original: https://cr.yp.to/docs/selfpipe.html

[cperciva]

Oops, brainfart. Sadly it's too late for me to edit that comment.

Yes, you can select just fine on pipes. What I was thinking of is that recv and send doesn't work on pipes, and asynchronous I/O frameworks typically want to use send/recv rather than write/read because the latter don't have a flags parameter.