[Bf-committers] Reference counting, deleting data and fake users

Daniel Salazar - 3Developer.com zanqdo at gmail.com
Wed Mar 14 22:06:22 CET 2012

-1 I like the new default. However the UI could be made more comunicative
about this, instead of displaying just a 0 it could somehow say this is
going to be deleted, not sure how yet but will give it a thought

Daniel Salazar

On Wed, Mar 14, 2012 at 12:40 PM, Tom Edwards <contact at steamreview.org>wrote:

> This is a problem specific to Actions. An object can have any number of
> relevant Actions, but it can only _use_ one at a time. Shameless plug:
> there's a patch at
> <http://projects.blender.org/tracker/index.php?func=detail&aid=28453>
> that fixes this problem.
> It's possible to get into this situation with other data types, but that
> requires the user to do advanced things like manually change an object's
> data or to explicitly delete the datablock.
> On 14/03/2012 6:20, Antony Riakiotakis wrote:
> > Interesting ranting post on blenderartists about data lost due to user
> > not setting fake user on datablock.
> >
> >
> http://blenderartists.org/forum/showthread.php?248813-MAJOR-BUG-in-2.62-loosing-Actions/page1
> >
> > The point is, in my opinion: Should the user care about the number of
> > datablock references? This looks like something that would concern the
> > reference counting system of a memory manager/garbage collector rather
> > than users.
> >
> > This would not have been a problem if we had an explicit way to delete
> > data and data always stayed in blender even after closing the program.
> > A user will usually want his data to stay if he creates it and go if
> > he deletes it. Currently there are two problems with the approach we
> > have: 1) You have to close the program to delete all unreferenced data
> > and 2) You can't create a library of datablocks without explicitly
> > setting a fake user, which is not the best of options.
> >
> > I realize this might have been a popular theme of debate but I am not
> > up to the facts. Is this a design choice or simply not  implemented
> > yet? Is this part of the asset browser project?
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> >
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