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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt for Python.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef AUTODECREF_H
#define AUTODECREF_H
#include "sbkpython.h"
#include "basewrapper.h"
struct SbkObject;
namespace Shiboken
{
/**
* AutoDecRef holds a PyObject pointer and decrement its reference counter when destroyed.
*/
struct LIBSHIBOKEN_API AutoDecRef
{
public:
AutoDecRef(const AutoDecRef &) = delete;
AutoDecRef(AutoDecRef &&) = delete;
AutoDecRef &operator=(const AutoDecRef &) = delete;
AutoDecRef &operator=(AutoDecRef &&) = delete;
/**
* 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 == nullptr; }
/// Returns the pointer of the Python object being held.
inline PyObject *object() { return m_pyObj; }
inline operator PyObject *() { return m_pyObj; }
#ifndef Py_LIMITED_API
inline operator PyTupleObject *() { return reinterpret_cast<PyTupleObject *>(m_pyObj); }
#endif
inline operator bool() const { return m_pyObj != nullptr; }
inline PyObject *operator->() { return m_pyObj; }
template<typename T>
T cast()
{
return reinterpret_cast<T>(m_pyObj);
}
/**
* Decref the current borrowed python reference and borrow \p other.
*/
void reset(PyObject *other)
{
// Safely decref m_pyObj. See Py_XSETREF in object.h .
PyObject *_py_tmp = m_pyObj;
m_pyObj = other;
Py_XDECREF(_py_tmp);
}
private:
PyObject *m_pyObj;
};
} // namespace Shiboken
#endif // AUTODECREF_H
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