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97 lines
2.9 KiB
C++
97 lines
2.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Sérgio Martins <sergio.martins@kdab.com>
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QSCOPEGUARD_H
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#define QSCOPEGUARD_H
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#include <QtCore/qglobal.h>
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QT_BEGIN_NAMESPACE
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template <typename F> class QScopeGuard;
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template <typename F> QScopeGuard<F> qScopeGuard(F f);
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template <typename F>
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class QScopeGuard
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{
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public:
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QScopeGuard(QScopeGuard &&other) Q_DECL_NOEXCEPT
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: m_func(std::move(other.m_func))
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, m_invoke(other.m_invoke)
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{
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other.dismiss();
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}
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~QScopeGuard()
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{
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if (m_invoke)
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m_func();
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}
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void dismiss() Q_DECL_NOEXCEPT
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{
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m_invoke = false;
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}
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private:
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explicit QScopeGuard(F f) Q_DECL_NOEXCEPT
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: m_func(std::move(f))
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{
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}
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Q_DISABLE_COPY(QScopeGuard)
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F m_func;
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bool m_invoke = true;
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friend QScopeGuard qScopeGuard<F>(F);
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};
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template <typename F>
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QScopeGuard<F> qScopeGuard(F f)
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{
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return QScopeGuard<F>(std::move(f));
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}
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QT_END_NAMESPACE
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#endif // QSCOPEGUARD_H
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