Skip wrote:
> When defining ExtensionClass types, you need to create and initialize a
> PyExtensionClass struct. It looks something like so:
>
> PyExtensionClass PyGtkTreeSortable_Type = {
> PyObject_HEAD_INIT(NULL)
> 0, /* ob_size */
> "GtkTreeSortable", /* tp_name */
> sizeof(PyPureMixinObject), /* tp_basicsize */
> ...
> };
>
> Note that the parameter to the PyObject_HEAD_INIT macro is NULL. It would
> normally be the address of a type object (e.g. &PyType_Type). However, Jim
> Fulton pointed out that on Windows you can't get the address of &PyType_Type
> object at compile time. Accordingly, ExtensionClass provides a
> PyExtensionClass_Export macro whose responsibility is, in part, to set the
> ob_type field appropriately at runtime
footnote: this is usually done in the module init function, *before*
the call to Py_InitModule. see:
http://www.python.org/doc/FAQ.html#3.24
if the garbage collector can run after Python calls a module's init-
function, but before that module calls back into Python, anything
can happen...
Cheers /F
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