Revision control
++ // Copyright (C) 2016 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
++
++ /*!
++ \class QtPrivate::RefCount
++ \inmodule QtCore
++ \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.
++ */