mirror of https://github.com/Icinga/icinga2.git
133 lines
4.1 KiB
C++
133 lines
4.1 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012-2013 Icinga Development Team (http://www.icinga.org/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (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 St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#include "python/pythoninterpreter.h"
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#include "base/objectlock.h"
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#include "base/utility.h"
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#include <boost/foreach.hpp>
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using namespace icinga;
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PythonInterpreter::PythonInterpreter(const PythonLanguage::Ptr& language,
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const Script::Ptr& script)
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: ScriptInterpreter(script), m_Language(language), m_ThreadState(NULL)
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{
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PyEval_AcquireLock();
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PythonInterpreter *interp = m_Language->GetCurrentInterpreter();
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m_Language->SetCurrentInterpreter(this);
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PyInterpreterState *pinterp = m_Language->GetMainThreadState()->interp;
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m_ThreadState = PyThreadState_New(pinterp);
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(void) PyThreadState_Swap(m_ThreadState);
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PyRun_SimpleString(script->GetCode().CStr());
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(void) PyThreadState_Swap(NULL);
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m_Language->SetCurrentInterpreter(interp);
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PyEval_ReleaseLock();
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}
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PythonInterpreter::~PythonInterpreter(void)
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{
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PyEval_AcquireLock();
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(void) PyThreadState_Swap(NULL);
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PyThreadState_Clear(m_ThreadState);
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PyThreadState_Delete(m_ThreadState);
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PyEval_ReleaseLock();
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}
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void PythonInterpreter::RegisterPythonFunction(const String& name, PyObject *function)
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{
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ObjectLock olock(this);
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SubscribeFunction(name);
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Py_INCREF(function);
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m_Functions[name] = function;
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}
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void PythonInterpreter::UnregisterPythonFunction(const String& name)
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{
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ObjectLock olock(this);
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UnsubscribeFunction(name);
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m_Functions.erase(name);
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}
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Value PythonInterpreter::ProcessCall(const String& function, const std::vector<Value>& arguments)
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{
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ObjectLock olock(this);
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PyEval_AcquireThread(m_ThreadState);
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PythonInterpreter *interp = m_Language->GetCurrentInterpreter();
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m_Language->SetCurrentInterpreter(this);
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try {
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std::map<String, PyObject *>::iterator it = m_Functions.find(function);
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if (it == m_Functions.end())
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BOOST_THROW_EXCEPTION(std::invalid_argument("Function '" + function + "' does not exist."));
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PyObject *func = it->second;
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PyObject *args = PyTuple_New(arguments.size());
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int i = 0;
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BOOST_FOREACH(const Value& argument, arguments) {
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PyObject *arg = PythonLanguage::MarshalToPython(argument);
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PyTuple_SetItem(args, i, arg);
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}
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PyObject *result = PyObject_CallObject(func, args);
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Py_DECREF(args);
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if (PyErr_Occurred()) {
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PyObject *ptype, *pvalue, *ptraceback;
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PyErr_Fetch(&ptype, &pvalue, &ptraceback);
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String msg = m_Language->ExceptionInfoToString(ptype, pvalue, ptraceback);
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Py_XDECREF(ptype);
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Py_XDECREF(pvalue);
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Py_XDECREF(ptraceback);
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BOOST_THROW_EXCEPTION(std::runtime_error("Error in Python script: " + msg));
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}
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Value vresult = PythonLanguage::MarshalFromPython(result);
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Py_DECREF(result);
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m_Language->SetCurrentInterpreter(interp);
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PyEval_ReleaseThread(m_ThreadState);
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return vresult;
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} catch (...) {
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m_Language->SetCurrentInterpreter(interp);
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PyEval_ReleaseThread(m_ThreadState);
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throw;
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}
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}
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