Method Callback

isapi/src/PythonEng.cpp:275–349

}

PyObject *CPythonHandler::Callback(
	HANDLER_TYPE typ,
	const char *format /* = NULL */,
	...
	)
{
	va_list va;
	PyObject *args;
	PyObject *ret = NULL;

	if (format && *format) {
		va_start(va, format);
		args = Py_VaBuildValue((char *)format, va);
		va_end(va);
	}
	else
		args = PyTuple_New(0);

	if (args == NULL)
		return NULL;

	if (!PyTuple_Check(args)) {
		PyObject *a;

		a = PyTuple_New(1);
		if (a == NULL)
			goto done;
		if (PyTuple_SET_ITEM(a, 0, args) < 0) {
			Py_DECREF(a);
			goto done;
		}
		// 'args' ref consumed by _SET_ITEM.
		args = a;
	}

	ret = DoCallback(typ, args);
	if (!ret) {
		if (m_engine->m_reload_exception &&
			PyErr_ExceptionMatches(m_engine->m_reload_exception)) {
			PyErr_Clear();
			// Need to call term first
			PyObject *temp_args = Py_BuildValue("(i)", 0);
			ret = DoCallback(HANDLER_TERM, temp_args);
			Py_XDECREF(temp_args);
			if (!ret) {
				ExtensionError(NULL, "Terminating for reload failed");
				PyErr_Clear();
			}
			Py_XDECREF(ret);
			// Now force the reload and refresh of all callbacks.
			if (!LoadHandler(true))
				goto done;
			Py_XDECREF(m_callback_init);
			m_callback_init = NULL;
			Py_XDECREF(m_callback_do);
			m_callback_do = NULL;
			Py_XDECREF(m_callback_term);
			m_callback_term = NULL;