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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: Why doesn't Emacs have an `active-timer-p' command, or why can't I
 find it?
Date: Thu, 11 Nov 2021 22:37:43 +0200
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To: Alan Mackenzie <acm@muc.de>
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In-Reply-To: <YY19nE+b9j35ZLq7@ACM> (message from Alan Mackenzie on Thu, 11
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> Date: Thu, 11 Nov 2021 20:31:24 +0000
> From: Alan Mackenzie <acm@muc.de>
> 
> There doesn't appear to be an easy way in a Lisp program to determine if
> a timer object is active.

What is an "active timer", and how does it differ from a non-active
one?