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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#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) : m_ptr(ptr) {}
QWindowsIUPointer() : m_ptr(nullptr) {}
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; }
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; }
T *get() const { return m_ptr; }
private:
T *m_ptr;
};
#endif
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