[C++-sig] BPL and Py_Clear()

[Niall Douglas]

On 10 Jun 2005 at 13:08, David Abrahams wrote:

> > How do you absolutely ensure a BPL wrapped object ceases to exist?
> > In other words, if python code has ten references to a BPL wrapped
> > object and I want that object to die immediately, therefore I would
> > have to ensure either (a) the BPL wrapped object becomes a zombie or
> > (b) each and every reference to that object is set to None.
> >
> > The latter sounds more appealing. I'm assuming I'd have to walk some
> > table in Python?
> 
> There is no known mechanism for the latter.
> 
> The former is easy: make sure the object is held by auto_ptr<T>, and
> pass the object to a function accepting an auto_ptr<T>.

The latter could probably be made to work if given enough time, but 
it would require a substantial amount of alterations to pyste to 
achieve it - and even then, I still can see issues which may arise.

Hence I must go the quick & dirty route. I was thinking of throwing a 
dummy exception, reading the traceback & stack frame info and 
recursing up through the globals() in each deleting any references to 
my object. This would surely do it for the current interpreter at 
least?

Cheers,
Niall