Method CreateNewPythonInstance

com/win32com/src/PyFactory.cpp:114–151

NOTE NOTE: CreateNewPythonInstance assumes that you have the Python thread lock already acquired.

// NOTE NOTE: CreateNewPythonInstance assumes that you have the Python thread lock 
// already acquired.
STDMETHODIMP CPyFactory::CreateNewPythonInstance(REFCLSID rclsid, REFCLSID rReqiid, PyObject **ppNewInstance)
{
	extern BOOL LoadGatewayModule(PyObject **);
	PyObject *pPyModule;

	if ( ppNewInstance == NULL )
		return E_INVALIDARG;

	if ( !LoadGatewayModule(&pPyModule) )
		return E_FAIL;

	// zap any existing errors so we can reliably check for errors
	// after object creation.
	PyErr_Clear();
	PyObject *obiid = PyWinObject_FromIID(rclsid);
	PyObject *obReqiid = PyWinObject_FromIID(rReqiid);
	if ( !obiid || !obReqiid)
	{
		Py_XDECREF(pPyModule);
		Py_XDECREF(obiid);
		Py_XDECREF(obReqiid);
		PyErr_Clear(); // nothing Python can do!
		return E_OUTOFMEMORY;
	}

	*ppNewInstance = PyObject_CallMethod(pPyModule, "CreateInstance",
	                                     "OO", obiid, obReqiid);
	// Check the error state before DECREFs, otherwise they may
	// change the error state.
	if ( !*ppNewInstance )
		PyCom_LoggerException(NULL, "ERROR: server.policy could not create an instance.");
	HRESULT hr = PyCom_SetCOMErrorFromPyException(IID_IClassFactory);
	Py_DECREF(obiid);
	Py_DECREF(obReqiid);
	Py_DECREF(pPyModule);

	return hr;
}

/*
** Load our C <-> Python gateway module if needed