From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Eli Zaretskii <eliz@gnu.org>
Cc: lekktu@gmail.com, eggert@cs.ucla.edu, 12450@debbugs.gnu.org
Subject: bug#12450: Remove configure's --without-sync-input option.
Date: Sun, 16 Sep 2012 14:37:42 -0400 [thread overview]
Message-ID: <jwva9wp95r7.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <83pq5mq8dm.fsf@gnu.org> (Eli Zaretskii's message of "Sun, 16 Sep 2012 18:45:25 +0300")
>> > Could you please describe how the SYNC_INPUT code is supposed to work
>> > in the following situations:
>> > . keyboard input on a TTY that comes while Lisp is running
>> > . an X event that exposes an Emacs frame in a GUI session, coming
>> > while Lisp is running
>> - The keyboard input or the X event causes a signal to be delivered.
> Which signals are those, specifically?
I'm not familiar enough to be sure (I changed the code of the signal
handler, but not the code that sets it up), but I think it's SIGIO
(basically, both the tty and the X11 code end up having
a file-descriptor on which inputs arrive, and the code sets up this
file-descriptor so that the kernel sends us a signal when input is
ready).
>> - QUIT processes the pending signals which will read the (keyboard/X11)
>> input and turn it in an event in the event queue (so input-pending-p
>> will know something has arrived), it may also do some more processing
>> such as redraw the window if the GUI needs it. Currently it also
>> handles things like mouse-face highlighting.
> Perhaps you could update the relevant portions in the commentary at
> the beginning of xdisp.c, as they tell a somewhat different story
> (probably about a soon-to-become-extinct non-SYNC_INPUT mode).
I'll try and take a look, thanks.
Stefan
next prev parent reply other threads:[~2012-09-16 18:37 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-15 7:54 bug#12450: Remove configure's --without-sync-input option Paul Eggert
2012-09-15 9:32 ` Eli Zaretskii
2012-09-15 10:14 ` Paul Eggert
2012-09-15 11:03 ` Eli Zaretskii
2012-09-15 19:59 ` Paul Eggert
2012-09-15 20:15 ` Eli Zaretskii
2012-09-15 20:31 ` Paul Eggert
2012-09-16 6:33 ` Eli Zaretskii
2012-09-16 7:47 ` Paul Eggert
2012-09-16 8:05 ` Eli Zaretskii
2012-09-16 8:17 ` Paul Eggert
2012-09-16 8:21 ` Eli Zaretskii
2012-09-16 8:24 ` Eli Zaretskii
2012-09-16 8:34 ` Paul Eggert
2012-09-16 8:53 ` Eli Zaretskii
2012-09-15 21:12 ` Stefan Monnier
2012-09-16 5:55 ` Eli Zaretskii
2012-09-16 14:58 ` Stefan Monnier
2012-09-16 15:45 ` Eli Zaretskii
2012-09-16 16:30 ` Paul Eggert
2012-09-16 18:40 ` Eli Zaretskii
2012-09-16 19:55 ` Jan Djärv
2012-09-16 18:37 ` Stefan Monnier [this message]
2012-09-16 9:33 ` Daniel Colascione
2012-09-16 10:43 ` Eli Zaretskii
2012-09-16 15:10 ` Stefan Monnier
2012-09-16 15:40 ` Eli Zaretskii
2012-09-15 22:18 ` Richard Stallman
2012-09-16 3:15 ` Paul Eggert
2012-09-16 6:10 ` Eli Zaretskii
2012-09-16 8:23 ` Paul Eggert
2012-09-16 8:32 ` Eli Zaretskii
2012-09-16 21:48 ` Paul Eggert
2012-09-17 7:42 ` Eli Zaretskii
2012-09-21 20:50 ` Paul Eggert
2012-09-22 9:03 ` Eli Zaretskii
2012-09-22 9:34 ` Paul Eggert
2012-09-22 9:50 ` Eli Zaretskii
2012-09-22 10:01 ` Paul Eggert
2012-09-16 9:52 ` Daniel Colascione
2012-09-16 10:44 ` Eli Zaretskii
2012-09-16 10:56 ` Daniel Colascione
2012-09-17 7:41 ` Eli Zaretskii
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