Function PyCom_InterfaceFromPyObject

com/win32com/src/PyComHelpers.cpp:191–237

}

BOOL PyCom_InterfaceFromPyObject(PyObject *ob, REFIID iid, LPVOID *ppv, BOOL bNoneOK /* = TRUE */)
{
	if ( ob == NULL )
	{
		// don't overwrite an error message
		if ( !PyErr_Occurred() )
			PyErr_SetString(PyExc_TypeError, "The Python object is NULL and no error occurred");
		return FALSE;
	}
	if ( ob == Py_None )
	{
		if ( bNoneOK )
		{
			*ppv = NULL;
			return TRUE;
		}
		else
		{
			PyErr_SetString(PyExc_TypeError, "None is not a valid interface object in this context");
			return FALSE;
		}
	}

	if ( !PyIBase::is_object(ob, &PyIUnknown::type) )
	{
		PyErr_Format(PyExc_ValueError,
                             "argument is not a COM object (got type=%s)",
                             ob->ob_type->tp_name);
		return FALSE;
	}
	IUnknown *punk = PyIUnknown::GetI(ob);
	if ( !punk )
		return FALSE;	/* exception was set by GetI() */
	/* note: we don't explicitly hold a reference to punk */
	HRESULT hr;
	Py_BEGIN_ALLOW_THREADS
	hr = punk->QueryInterface(iid, ppv);
	Py_END_ALLOW_THREADS
	if ( FAILED(hr) )
	{
		PyCom_BuildPyException(hr);
		return FALSE;
	}
	/* note: the QI added a ref for the return value */

	return TRUE;
}

HRESULT PyCom_MakeRegisteredGatewayObject(REFIID iid, PyObject *instance, PyGatewayBase *base, void **ppv)
{