bug#50043: 28.0.50; USABLE_SIGOI undef code paths do not work correctly

[Lars Ingebrigtsen]

Ken Brown <kbrown@cornell.edu> writes:

> Namely, whenever wait_reading_process_output is polling for input,
> avoid getting stuck in select, something like this:

[...]

> +#ifndef USABLE_SIGIO
> +         /* If we're polling for input, don't get stuck in select for
> +            more than 25 msec. */
> +         struct timespec short_timeout = make_timespec (0, 25000000);
> +         if ((read_kbd || !NILP (wait_for_cell))
> +             && timespec_cmp (short_timeout, timeout) < 0)
> +           timeout = short_timeout;
> +#endif

Sounds like a good general solution to me (but I guess this will also
affect `accept-process-output'?  So it should probably be documented
there).

-- 
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   bloggy blog: http://lars.ingebrigtsen.no