[Patches] Re: Trashcan vs. GC vs. TRACE_REFS

[Neil Schemenauer]

On Wed, Apr 26, 2000 at 11:56:59AM +1000, Mark Hammond wrote:
> If you are saying that there are no (known) extension types
> that could possibly be affected, and that any written in the
> future must match Python's GC mode - then it sounds perfect,
> and a bridge to cross when we come to it (by which time of
> course the patch will prove so wonderful that it is made
> standard :-)

That's what I'm saying.  Types that want to "be involved in GC"
must:

    Use PyGC_NEW* instead of PyObject_NEW*.

    Use PyGC_Del to free the object structure.

    Call PyGC_Insert and PyGC_Remove appropriately.  Objects
    should only be included in the GC set when they are valid.
    
    Implement tp_recurse.

    Add the feature bit Py_TPFLAGS_HAVE_GCINFO.

Types which don't "op-in" for GC are safe.

> That's-one-long-sentence-ly,

Especially when its on one line. :)


    Neil