Re: Confused by Lua garbage collection tear down order when there are references between objects

[Philipp Janda <siffiejoe@...>]

Am 21.05.2014 23:44 schröbte Eric Wing:
> > I have another idea: What about splitting the A objects into two objects
> > A and A_finalizer. The A_finalizer only lives in A's uservalue table, so
> > it usually will become garbage at the same time as A. Whenever you
> > associate a B object with the A object, you "disarm" the old
> > A_finalizer, create a new one, and put both the B object and the new
> > A_finalizer in A's uservalue table. Since the A_finalizer was created
> > after the B object, it will be finalized before it.
>
> Nice thought.

I have tested this idea by now, and it works fine. You can even write a 
general `remark_for_finalization` function for all[*] userdata and put 
it in a library.


Philipp

  [*] my implementation still requires a uservalue table