GNU bug report logs - #5823
run-at-time and Setting system time

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: david <at> adboyd.com (J. David Boyd)
To: bug-gnu-emacs <at> gnu.org
Cc: help-gnu-emacs <at> gnu.org
Subject: Re: run-at-time and Setting system time
Date: Fri, 02 Apr 2010 13:36:51 -0400

chandan <chandan.babu <at> globaledgesoft.com> writes:

> Hi,
>    Consider the following code:
>
> (defun mwnn-timer-callback ()
>  (message "Hi, inside mwnn-timer-callback"))
>
> (run-at-time "60" nil 'mwnn-timer-callback)
>
> The above code is supposed to cause mwnn-timer-callback to get invoked
> after 60 seconds. But if the system time is changed to a future date
> (say 20 seconds after the timer is started) the timer fires
> immediately.
>
> Is this is a bug in the emacs code. If yes, can this be rectified?
>
> Regards,
> mwnn


It sounds like a good thing to me.

Say the time is 13:00, and you do what you said.  You told the machine
to give an invocation at 13:01.  

If you move the clock ahead, the code _should_ run, as it is now past
13:01.

Dave

Message #10 received at 5823 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: david <at> adboyd.com (J. David Boyd)
Cc: 5823 <at> debbugs.gnu.org
Subject: Re: run-at-time and Setting system time
Date: Sun, 18 Sep 2011 22:02:39 +0200

david <at> adboyd.com (J. David Boyd) writes:

>> (defun mwnn-timer-callback ()
>>  (message "Hi, inside mwnn-timer-callback"))
>>
>> (run-at-time "60" nil 'mwnn-timer-callback)
>>
>> The above code is supposed to cause mwnn-timer-callback to get invoked
>> after 60 seconds. But if the system time is changed to a future date
>> (say 20 seconds after the timer is started) the timer fires
>> immediately.
>>
>> Is this is a bug in the emacs code. If yes, can this be rectified?
>>
>> Regards,
>> mwnn
>
> It sounds like a good thing to me.
>
> Say the time is 13:00, and you do what you said.  You told the machine
> to give an invocation at 13:01.  
>
> If you move the clock ahead, the code _should_ run, as it is now past
> 13:01.

Yes, I don't think this is a bug, so I'm closing this report.

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

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