bug#12447: 24.1.50; Stuck in garbage collection on OS X

[Jan Djärv]

15 sep 2012 kl. 13:07 skrev Harald Hanche-Olsen <hanche@math.ntnu.no>:

> [Jan Djärv <jan.h.d@swipnet.se> (2012-09-15 09:55:55 UTC)]
> 
>> I think this is probably the same bug as in #12326.  I.e. a timer gets added 
>> over and over again.
>> Please consider how to fix the original problem as described in 
>> http://debbugs.gnu.org/cgi/bugreport.cgi?bug=12326#11 before removing the 
>> break statement.
> 
> Thanks for the pointer. There are certainly timers involved in the code that 
> runs when I get the hangs; I'll review it and see if that is where the 
> problem lies.
> 
> However, I am not sure exactly what to look for. Or, more precisely, what is 
> the undefined behaviour in js2-mode that you complain about it bug 12326?
> 

The undefined behaviour was before adding the break, timers could run at a time 
in the future that depended on other timers.  The defined behaviour is with the 
break, timers run when they should.

I suspect there is some bug in the C code when adding a timer from within a 
timer callback.

> On a side note, I see that only a few timer functions are described in the 
> elisp manual. It appears one has to read timer.el to find out how timers work 
> at a lower level. Or did I miss something?

As Eli has answered, the timers are handeled in C as a list sorted by time when 
the timers are to be run.  I.e. the next timer to run is at the head of the 
list.

        Jan D.