mirror of
https://github.com/worldforge/cyphesis
synced 2026-08-13 12:26:04 -04:00
122 lines
4 KiB
C++
122 lines
4 KiB
C++
// Cyphesis Online RPG Server and AI Engine
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// Copyright (C) 2011 Alistair Riddoch
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software Foundation,
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// Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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// $Id$
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#include <Python.h>
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#include "PythonClass.h"
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#include "rulesets/Python_Script_Utils.h"
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#include "common/log.h"
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#include "common/compose.hpp"
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/// \brief ScriptKit constructor
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///
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/// @param package name of the script package scripts are to be created from
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/// @param type name of the type instanced to create scripts
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PythonClass::PythonClass(const std::string & package,
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const std::string & type,
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PyTypeObject * base) : m_package(package),
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m_type(type),
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m_base(base),
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m_module(0),
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m_class(0)
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{
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}
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PythonClass::~PythonClass()
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{
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if (m_class != 0) {
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Py_DECREF(m_class);
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}
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if (m_module != 0) {
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Py_DECREF(m_module);
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}
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}
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int PythonClass::load()
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{
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m_module = Get_PyModule(m_package);
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if (m_module == NULL) {
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return -1;
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}
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return getClass(m_module);
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}
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/// \brief Retrieve the pythonclass object from the module which has
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/// already been loaded.
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int PythonClass::getClass(PyObject * module)
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{
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PyObject * new_class = Get_PyClass(module, m_package, m_type);
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if (new_class == 0) {
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// If this is a new class, leave it as zero and fail and this
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// should be discarded by <*>RuleHandler
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// If this is an existing class, leave it as the old value, but
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// fail the update. This should signal back to the client.
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return -1;
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}
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if (!PyType_IsSubtype((PyTypeObject*)new_class, m_base)) {
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log(ERROR, String::compose("Python class \"%1.%2\" does not inherit "
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"from a core server type \"%3\".",
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m_package, m_type, m_base->tp_name));
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Py_DECREF(new_class);
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return -1;
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}
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if (m_class != 0) {
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Py_DECREF(m_class);
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}
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m_class = new_class;
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return 0;
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}
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int PythonClass::refresh()
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{
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if (m_module == 0) {
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log(ERROR, "bort");
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return -1;
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}
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PyObject * new_module = PyImport_ReloadModule(m_module);
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if (new_module == 0) {
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log(ERROR, String::compose("Error reloading python module \"%1\"",
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m_package));
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PyErr_Clear();
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return -1;
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}
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int ret = getClass(new_module);
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if (ret != 0) {
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log(ERROR, String::compose("Error finding python class \"%1\" in \"%2\"",
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m_type, m_package));
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return -1;
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// After reloading, but failing to get the class, I think the old class
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// should still work, but is no longer bound to the name. It won't
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// be collected at least until we release the reference we hold
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// in m_class
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}
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// We decref even though this is probably an identical pointer to the
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// module because the PyImport_ call returned a new reference
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Py_DECREF(m_module);
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if (m_module != new_module) {
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log(WARNING, String::compose("Python module \"%1.%2\" has changed "
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"its pointer on reload",
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m_package, m_type));
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m_module = new_module;
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}
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return 0;
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}
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