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Re: bug#5822: run-at-time and Setting system time

From: chandan
Subject: Re: bug#5822: run-at-time and Setting system time
Date: Mon, 05 Apr 2010 03:43:29 -0000
User-agent: Thunderbird (X11/20090605)

Eli Zaretskii wrote:
Date: Fri, 02 Apr 2010 12:29:42 +0530
From: chandan <>
(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?

I think this how the timers are supposed to behave.  They are not
interval timers, if that's what you expected.

Emacs seems to use setitimer & getitimer (interval timers) for implementing the timer module. This may be the cause of the problem. Using timer_create, timer_delete, timer_settime, timer_gettime etc.

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