Re: Why doesn't Emacs have an `active-timer-p' command, or why can't I find it?

[Rudolf Schlatte]

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outdated as soon as the function returns..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