94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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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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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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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 General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QREFCOUNT_H
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#define QREFCOUNT_H
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#include <QtCore/qatomic.h>
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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namespace QtPrivate
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{
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class RefCount
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{
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public:
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inline void ref() {
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if (atomic.load() > 0)
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atomic.ref();
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}
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inline bool deref() {
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if (atomic.load() <= 0)
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return true;
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return atomic.deref();
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}
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inline bool operator==(int value) const
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{ return atomic.load() == value; }
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inline bool operator!=(int value) const
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{ return atomic.load() != value; }
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inline bool operator!() const
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{ return !atomic.load(); }
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inline operator int() const
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{ return atomic.load(); }
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inline RefCount &operator=(int value)
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{ atomic.store(value); return *this; }
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inline RefCount &operator=(const RefCount &other)
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{ atomic.store(other.atomic.load()); return *this; }
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QBasicAtomicInt atomic;
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};
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#define Q_REFCOUNT_INITIALIZER(a) { Q_BASIC_ATOMIC_INITIALIZER(a) }
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}
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif
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