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/*
* This file is part of the Shiboken Python Bindings Generator project.
*
* Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
*
* Contact: PySide team <contact@pyside.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AUTODECREF_H
#define AUTODECREF_H
#include "sbkpython.h"
#include "shibokenmacros.h"
class SbkObject;
namespace Shiboken
{
/**
* AutoDecRef holds a PyObject pointer and decrement its reference counter when destroyed.
*/
class LIBSHIBOKEN_API AutoDecRef
{
public:
/**
* AutoDecRef constructor.
* \param pyobj A borrowed reference to a Python object
*/
explicit AutoDecRef(PyObject* pyObj) : m_pyObj(pyObj) {}
/**
* AutoDecRef constructor.
* \param pyobj A borrowed reference to a Python object
*/
explicit AutoDecRef(SbkObject* pyObj) : m_pyObj(reinterpret_cast<PyObject*>(pyObj)) {}
/// Decref the borrowed python reference
~AutoDecRef()
{
Py_XDECREF(m_pyObj);
}
inline bool isNull() const { return m_pyObj == 0; }
/// Returns the pointer of the Python object being held.
inline PyObject* object() { return m_pyObj; }
inline operator PyObject*() { return m_pyObj; }
inline operator PyTupleObject*() { return reinterpret_cast<PyTupleObject*>(m_pyObj); }
inline operator bool() const { return m_pyObj; }
inline PyObject* operator->() { return m_pyObj; }
template<typename T>
T cast()
{
return reinterpret_cast<T>(m_pyObj);
}
/**
* Decref the current borrowed python reference and take the reference
* borrowed by \p other, so other.isNull() will return true.
*/
void operator=(AutoDecRef& other)
{
Py_XDECREF(m_pyObj);
m_pyObj = other.m_pyObj;
other.m_pyObj = 0;
}
/**
* Decref the current borrowed python reference and borrow \p other.
*/
void operator=(PyObject* other)
{
Py_XDECREF(m_pyObj);
m_pyObj = other;
}
private:
PyObject* m_pyObj;
AutoDecRef(const AutoDecRef&);
AutoDecRef& operator=(const AutoDecRef&);
};
} // namespace Shiboken
#endif // AUTODECREF_H
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