[Stackless] PySide problem, take #2: typeobject clash

Christian Tismer tismer at stackless.com
Tue Oct 22 18:27:00 CEST 2013


On 22.10.13 16:24, John Ehresman wrote:
>> On 21.10.13 22:10, John Ehresman wrote:
>>>
>>> I think I see the problem; to me, at least, it's useful to see the
>>> stackless version of object.h at
>>> http://www.stackless.com/browser/Include/object.h  It looks like
>>> stackless moves the fields defined in PyHeapTypeObject into
>>> PyTypeObject, adds at least one additional field, and then #define's
>>> PyHeapTypeObject to PyTypeObject.  This leads to two problems, which
>>> are somewhat separable --
>>>
>>> 1) When compiling, there is no ht_type field in PyHeapTypeObject. This
>>> is what Christian's patch addresses.
>
> Wouldn't it be possible to use something like the following in 
> shiboken's basewrapper.h (untested code below):
>
> /// PyTypeObject extended with C++ multiple inheritance information.
> #ifndef STACKLESS
>
> struct LIBSHIBOKEN_API SbkObjectType
> {
>     PyHeapTypeObject super;
>     SbkObjectTypePrivate* d;
> };
>
> #else // STACKLESS
>
> // Work around stackless's modification of PyTypeObject and 
> PyHeapTypeObject
> struct LIBSHIBOKEN_API SbkObjectType
> {
>     struct {
>         PyTypeObject ht_type;
>     } super;
>     SbkObjectTypePrivate* d;
> };
>
> #endif
>
> This would have the advantage of not sprinkling macros across the code 
> base.  It does not address the binary compatibility problem.

Hmm, good idea!
That would really be a minimal patch with much less ugliness and clutter.
Well, not sure yet if I want to try that really right now...maybe

ciao - chris

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