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Diffstat (limited to 'src/corelib/tools/qrefcount.cpp')
-rw-r--r-- | src/corelib/tools/qrefcount.cpp | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/corelib/tools/qrefcount.cpp b/src/corelib/tools/qrefcount.cpp new file mode 100644 index 0000000000..c40214b2ab --- /dev/null +++ b/src/corelib/tools/qrefcount.cpp @@ -0,0 +1,51 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/*! + \class QtPrivate::RefCount + \internal + + QRefCount implements atomic ref counting for Qt's shared classes. It behaves very similar + to QAtomicInt, but ignores negative ref counts. + + This can be used to allow to implement e.g. const read-only QStringData objects. QString::shared_null and + the qs(...) macro make use of this feature. +*/ |