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/****************************************************************************
**
** Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "stringtoint_p.h"
#include <QMutex>
#include <QReadWriteLock>
#include <QHash>
QT_BEGIN_NAMESPACE
namespace Qt3DRender {
namespace Render {
namespace {
QReadWriteLock lock;
QHash<QString, int> map = QHash<QString, int>();
QVector<QString> reverseMap = QVector<QString>();
} // anonymous
int StringToInt::lookupId(QLatin1String str)
{
// ### optimize me
return lookupId(QString(str));
}
int StringToInt::lookupId(const QString &str)
{
int idx;
{
QReadLocker readLocker(&lock);
idx = map.value(str, -1);
}
if (Q_UNLIKELY(idx < 0)) {
QWriteLocker writeLocker(&lock);
idx = map.value(str, -1);
if (idx < 0) {
idx = reverseMap.size();
Q_ASSERT(map.size() == reverseMap.size());
map.insert(str, idx);
reverseMap.append(str);
}
}
return idx;
}
QString StringToInt::lookupString(int idx)
{
QReadLocker readLocker(&lock);
if (Q_LIKELY(reverseMap.size() > idx))
return reverseMap.at(idx);
return QString();
}
} // Render
} // Qt3DRender
QT_END_NAMESPACE
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