Re: SIGPIPE-equivalent before writing?

[Greg Troxel <gdt%lexort.com@localhost>]

Taylor R Campbell <riastradh%NetBSD.org@localhost> writes:

> - Would you use EVFILT_WRITE?
>
>   Doesn't that entail a busy-wait for EV_EOF, because -- unless the
>   pipe buffer is full -- the producer can often write without blocking
>   while it's doing computation?

It is only a busy-wait if you loop back immediately.  It would not
do exactly what you want, but a thread that slept 100 ms and checked for
writability and did shutdown if not, would be reasonably prompt with
reasonable CPU time.  It is icky compared to having EVFILT_NO_WRITE or
the select equivalent.