From: Tomohiro Matsuyama <tomo@cx4a.org>
To: emacs-devel@gnu.org
Subject: Timer scheduling and cancel-timer
Date: Mon, 21 Jan 2013 00:58:02 +0900 [thread overview]
Message-ID: <20130121005802.c7383f4994ead287e738f96f@cx4a.org> (raw)
Hi,
I have found a problem that cancel-timer will not work in a particular
situation where the timer takes more time to execute than a
rescheduling interval of the timer. Here is the reproducible code:
(setq my-timer
(run-with-timer
nil 0.1
(lambda ()
(when my-timer
(cancel-timer my-timer)
(setq my-timer nil)
(sit-for 0.3)))))
After evaluating this code several times, you may see "zombie" timers
in timer-list, though the code intends to keep at most one timer.
As my quick look, the problem may be caused by timer_check in
keyboard.c by firing the timer twice at the same time, that makes the
timer remain in timer-list though the timer has been canceled.
Regards,
Tomohiro
--
Tomohiro Matsuyama <tomo@cx4a.org>
next reply other threads:[~2013-01-20 15:58 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-20 15:58 Tomohiro Matsuyama [this message]
2013-01-20 19:22 ` Timer scheduling and cancel-timer Paul Eggert
2013-01-20 21:04 ` Drew Adams
2013-01-20 21:35 ` Drew Adams
2013-01-21 1:36 ` Stefan Monnier
2013-01-21 1:39 ` Drew Adams
2013-01-22 3:50 ` Drew Adams
2013-01-22 11:28 ` Stephen Berman
2013-01-22 16:00 ` Stephen Berman
2013-01-22 16:09 ` Bastien
2013-01-23 9:32 ` Bastien
2013-01-23 13:03 ` Stefan Monnier
2013-01-23 13:29 ` Bastien
2013-01-23 20:35 ` Stefan Monnier
2013-01-23 22:01 ` Bastien
2013-01-24 16:32 ` Drew Adams
2013-01-24 19:02 ` Bastien
2013-01-22 13:34 ` Stefan Monnier
2013-01-22 13:57 ` Bastien
2013-01-22 14:14 ` Stefan Monnier
2013-03-31 11:17 ` Tomohiro Matsuyama
2013-03-31 16:44 ` Michael Heerdegen
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