On Nov 15, 10:00 pm, "Gabriel Genellina" <[EMAIL PROTECTED]> wrote: > En Fri, 16 Nov 2007 00:27:42 -0300, <[EMAIL PROTECTED]> escribió: > > > > > On Nov 1, 11:04 pm, "Gabriel Genellina" <[EMAIL PROTECTED]> > > wrote: > >> En Thu, 01 Nov 2007 22:13:35 -0300, <[EMAIL PROTECTED]> escribió: > >> >> I'm in a situation when i don't really need to extend python with any > >> >> classes of my own but > >> >> i do have extra luggage for the python data structures such as > >> tuples, > >> >> lists, dictionaries, etc > >> >> on the c++ side. I see no place in PyObject_HEAD where i can stick a > >> >> void* to my extra data. > > >> Assuming you can recompile all the extensions you use, you could insert > >> your void* into _PyObject_HEAD_EXTRA and _PyObject_EXTRA_INIT > > > i added two void pointers to head_extra and 0,0, to the extra_init. > > For some reason i get garbage in them from PyEval_EvalCode :-( > > (that's after i blew the build dir and rebuilt 2.4.4 from scratch > > so i don't think i have a bad build) > > Can't you use instead the other approaches suggested on this thread? Like > keeping a weakkey dictionary holding your additional attributes? Seems a > lot safer to do that way. > > I've never changed that headers myself so I can't guarantee it works. > Perhaps there are some assumptions somewhere in the code about a specific > layout. But since _PyObject_HEAD_EXTRA is used in the debug build I think > you should be able to add your own fields, at least in principle...
i finally found that i need to reset my fields in _Py_NewReference(op) also. weakref approach won't work for me because i need extra data in lists/ dictionaries/tuples in addition to instances of classes (all instances of all classes: can't derive and essentially make my own bloated psl to maintain) > Remember that this change invalidates ALL binaries for ANY library or > extension you may be using. An additional check might be to change the that's not a problem since i build with a prefix other than /usr/local and the target is an embedded system so i have full control over the environment (until someone cracks it :-) i finally got most of the code working after i figured out that HEAD_INIT is ignored by tuple allocation code, etc and _Py_NewReference has to be modified. thank all of you for all the help. you got me unstuck. -- http://mail.python.org/mailman/listinfo/python-list
