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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 <Python.h>
#include "shibokenmacros.h"

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() {
        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);
    }
private:
    PyObject* m_pyobj;
    AutoDecRef(const AutoDecRef&);
    AutoDecRef& operator=(const AutoDecRef&);
};


} // namespace Shiboken

#endif // AUTODECREF_H