Re: Reading D-Bus messages

[Eli Zaretskii]

> Date: Fri, 24 Sep 2010 09:20:45 -0400
> From: Ken Brown <address@hidden>
> CC: emacs-devel <address@hidden>
> 
> Regardless of what decision is ultimately made about these questions, 
> I'd still like to know why one (and only one) of the calls to 
> gobble_input in keyboard.c is made only if SIGIO is defined.

Because SIGIO means input is interrupt-driven, and therefore can
arrive asynchronously, by raising an interrupt and invoking the
interrupt handler.  The other possibilities are synchronous, and
therefore don't need to be checked more than once in a loop.