From: Eli Zaretskii <eliz@gnu.org>
To: Alexander Miller <alexanderm@web.de>
Cc: yyoncho@gmail.com, emacs-devel@gnu.org
Subject: Re: Questions about throw-on-input
Date: Mon, 11 May 2020 17:13:28 +0300 [thread overview]
Message-ID: <834ksmd0fr.fsf@gnu.org> (raw)
In-Reply-To: <1f5456b9-1fd6-5084-1578-8f6a413fe1b4@web.de> (message from Alexander Miller on Sun, 10 May 2020 15:47:18 +0200)
> From: Alexander Miller <alexanderm@web.de>
> Date: Sun, 10 May 2020 15:47:18 +0200
> Cc: emacs-devel@gnu.org
>
> Checking (input-pending-p) does not work in this scenario. When your
> worker thread is actually busy (simulated by the 10000 calls to random
> below) input-pending-p will not return t, no matter how much you hammer
> the keyboard in the meatime. The yield-time message will not appear even
> once. So it looks like keeping the CPU busy also prevents the processing
> of input events.
It is unusual for non-main threads to wait for keyboard input
descriptor. You shouldn't rely on that because it can only work very
rarely, if at all, and when it does, you are likely to see serious
problems. Normally, the 'pselect' call issued by a non-main thread
will not mark the keyboard descriptor as being waited for.
At least, that's my understanding of the code and its implications.
next prev parent reply other threads:[~2020-05-11 14:13 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-10 13:47 Questions about throw-on-input Alexander Miller
2020-05-11 14:13 ` Eli Zaretskii [this message]
2020-05-11 15:21 ` Stefan Monnier
2020-05-11 16:19 ` Eli Zaretskii
2020-05-11 17:27 ` Stefan Monnier
2020-05-11 17:39 ` Alexander Miller
2020-05-11 18:23 ` Eli Zaretskii
2020-05-11 18:24 ` Stefan Monnier
2020-05-11 19:48 ` Alexander Miller
2020-05-11 20:14 ` Stefan Monnier
2020-05-12 22:33 ` Alexander Miller
2020-05-13 14:43 ` Eli Zaretskii
2020-05-13 18:47 ` Alexander Miller
2020-05-14 8:32 ` Philipp Stephani
2020-05-14 14:23 ` Eli Zaretskii
2020-05-14 14:37 ` Philipp Stephani
2020-05-14 16:56 ` Drew Adams
2020-05-15 3:21 ` Richard Stallman
2020-05-15 3:54 ` Stefan Monnier
2020-05-15 8:19 ` Arthur Miller
2020-05-15 15:45 ` Stefan Monnier
2020-05-15 16:46 ` Yuan Fu
2020-05-15 17:31 ` Stefan Monnier
2020-05-15 17:50 ` yyoncho
2020-05-15 18:44 ` Alexander Miller
2020-05-15 18:55 ` Stefan Monnier
2020-05-15 19:46 ` Philipp Stephani
2020-05-15 18:00 ` Andrea Corallo
2020-05-15 17:35 ` Arthur Miller
2020-05-15 19:47 ` chad
2020-05-16 11:29 ` Eli Zaretskii
2020-05-12 2:39 ` Daniel Colascione
2020-05-12 14:37 ` Eli Zaretskii
2020-05-11 18:17 ` Eli Zaretskii
-- strict thread matches above, loose matches on Subject: below --
2020-05-09 13:09 Alexander Miller
2020-05-10 11:11 ` yyoncho
2020-05-07 7:31 Ivan Yonchovski
2020-05-07 12:36 ` Eli Zaretskii
2020-05-07 14:28 ` Ivan Yonchovski
2020-05-07 21:11 ` yyoncho
2020-05-08 1:58 ` Stefan Monnier
2020-05-08 4:36 ` yyoncho
2020-05-08 4:43 ` yyoncho
2020-05-12 4:15 ` Michael Heerdegen
2020-05-08 10:41 ` Eli Zaretskii
2020-05-08 11:23 ` Ivan Yonchovski
2020-05-08 11:45 ` Eli Zaretskii
2020-05-08 11:55 ` yyoncho
2020-05-08 14:55 ` Stefan Monnier
2020-05-08 18:04 ` yyoncho
2020-05-07 13:49 ` Stefan Monnier
2020-05-07 15:36 ` Ivan Yonchovski
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