From: Rudolf Schlatte <rudi@constantly.at>
To: emacs-devel@gnu.org
Subject: Re: Why doesn't Emacs have an `active-timer-p' command, or why can't I find it?
Date: Fri, 12 Nov 2021 14:13:00 +0100 [thread overview]
Message-ID: <m2k0hdsejn.fsf@constantly.at> (raw)
In-Reply-To: 87h7ci3x6h.fsf@gnus.org
Lars Ingebrigtsen <larsi@gnus.org> writes:
> Óscar Fuentes <ofv@wanadoo.es> writes:
>
>> An implementation would be
>>
>> (defun timer-active-p (timer)
>> (timer--check timer)
>> (or (memq timer timer-list))
>> (memq timer timer-idle-list))
>
> Sounds useful to me.
Of course, the form
(when (timer-active-p my-timer)
(do-something-that-errors-when-timer-inactive my-timer))
can still throw an error, since the return value of `timer-active-p' is
outdated as soon as the function returns.. (Or can timers only fire
when Emacs is otherwise idle?)
Rudi
next prev parent reply other threads:[~2021-11-12 13:13 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-11 20:31 Why doesn't Emacs have an `active-timer-p' command, or why can't I find it? Alan Mackenzie
2021-11-11 20:37 ` Eli Zaretskii
2021-11-11 21:08 ` Alan Mackenzie
2021-11-11 21:24 ` Óscar Fuentes
2021-11-12 2:49 ` Lars Ingebrigtsen
2021-11-12 7:55 ` ๊Unsubscribe Sakesun Roykiattisak
2021-11-12 13:13 ` Rudolf Schlatte [this message]
2021-11-12 14:12 ` Why doesn't Emacs have an `active-timer-p' command, or why can't I find it? Filipp Gunbin
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