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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QWINDOWSIUPOINTER_H
#define QWINDOWSIUPOINTER_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
template <class T>
class QWindowsIUPointer
{
public:
explicit QWindowsIUPointer(T *ptr = nullptr) : m_ptr(ptr) {}
QWindowsIUPointer(const QWindowsIUPointer<T> &uiPtr) : m_ptr(uiPtr.m_ptr) { if (m_ptr) m_ptr->AddRef(); }
QWindowsIUPointer(QWindowsIUPointer<T> &&uiPtr) : m_ptr(uiPtr.m_ptr) { uiPtr.m_ptr = nullptr; }
~QWindowsIUPointer() { if (m_ptr) m_ptr->Release(); }
QWindowsIUPointer& operator=(const QWindowsIUPointer<T> &rhs) {
if (this != &rhs) {
if (m_ptr)
m_ptr->Release();
m_ptr = rhs.m_ptr;
m_ptr->AddRef();
}
return *this;
}
QWindowsIUPointer& operator=(QWindowsIUPointer<T> &&rhs) noexcept {
if (m_ptr)
m_ptr->Release();
m_ptr = rhs.m_ptr;
rhs.m_ptr = nullptr;
return *this;
}
explicit operator bool() const { return m_ptr != nullptr; }
operator T*() const { return m_ptr; }
T* operator->() const { return m_ptr; }
T** address() { Q_ASSERT(m_ptr == nullptr); return &m_ptr; }
void reset(T* ptr = nullptr) { if (m_ptr) m_ptr->Release(); m_ptr = ptr; }
T* release() { T* ptr = m_ptr; m_ptr = nullptr; return ptr; }
private:
T* m_ptr;
};
#endif
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