[Pyobjc-dev] Refcounting problem - idea?

[Jack J. <Jac...@cw...>]

On zaterdag, aug 9, 2003, at 12:14 Europe/Amsterdam, Ronald Oussoren 
wrote:

>  As Martina already noted, the combobox probably doesn't retain it's 
> datasource. There's not much we can do about that. Cocoa seems to do 
> this quite often, probably to avoid reference counting cycles. Let's 
> hope that Apple adds a real garbage collector in the future.

I was just wondering: are there *any* places where the user is expected 
to pass a
wrapped ObjC object to a method call, and have that object be garbage 
collected
when the call returns?

Because if there aren't any such legal uses (as I expect) then we could 
warn about
this: the wrapper code could check (just before the DECREF) that the 
refcount is 1
*and* the object is a wrapped ObjC object, and in that case print a 
warning.

Down side is that it won't catch everything, of course:
     def awakeFromNib(self):
         tmp = WordTypeManager.alloc().init(self.db)
         self.word_type.setDataSource_(tmp)
will slip through silently.

--
- Jack Jansen        <Jac...@or...>        
http://www.cwi.nl/~jack -
- If I can't dance I don't want to be part of your revolution -- Emma 
Goldman -