[Python-Dev] Omit Py_buffer struct from Stable ABI for Python 3.2?

[Antoine Pitrou]

On Wed, 5 Jan 2011 12:55:55 +0000
Mark Dickinson <dickinsm at gmail.com> wrote:
> On Wed, Jan 5, 2011 at 12:31 PM, Nick Coghlan <ncoghlan at gmail.com> wrote:
> > Currently [1], the implementation and the documentation for PEP 3118's
> > Py_buffer struct don't line up (there's an extra field in the
> > implementation that the PEP doesn't mention).
> 
> I think there are actually two such fields:  smalltable and obj.
> 
> The need for obj is a little ugly:  as far as I can tell, it's
> meaningless for a 3rd-party object that wants to export buffers---it's
> only really used by the memoryview object and by internal Python
> types.

I don't think it's ugly. It's the only way to know which object exported
a Py_buffer. Otherwise you have to track the information separately,
which is quite a bit uglier (especially when in conjunction with
PyArg_ParseTuple and friends).

Regards

Antoine.