[Python-Dev] Memory management question

[M.-A. Lemburg]

Thomas Heller wrote:
> 
> I'm trying to port Don Beaudry's objectmodule to Python 2.0
> and encountered the following problem. Here is a part from Don's code:
> 
>   co = (MetaClassObject*) PyClass_New(NULL, methods, name);
>   co = PyObject_Realloc(co, sizeof (MetaClassObject));
> 
> As you see, he is trying to achive cheap code reuse.
> This code does not work.
> 
> I have tracked it down to the following sample, which does also not
> work. In the debug version on windows, the PyObject_REALLOC
> fails with an assertion-error: _CrtIsValidHeapPointer(pUserData)
> 
>  op = PyObject_NEW(PyClassObject, &PyClass_Type);
>  op = PyObject_REALLOC(op, sizeof(PyClassObject) + 20);
> 
> Should the above work or am I doing something wrong?

Wouldn't it be safer to first create a MetaClassObject and then
let the standard ClassObject initialize it ?

-- 
Marc-Andre Lemburg
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