blob: 0e0d38c9c78435035ecc312e16bdd2e9421392cc (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
/****************************************************************************
**
** 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 {
struct StringToIntCache
{
QReadWriteLock lock;
QHash<QString, int> map = QHash<QString, int>();
QVector<QString> reverseMap = QVector<QString>();
static StringToIntCache& instance()
{
static StringToIntCache c;
return c;
}
};
} // anonymous
int StringToInt::lookupId(QLatin1String str)
{
// ### optimize me
return lookupId(QString(str));
}
int StringToInt::lookupId(const QString &str)
{
auto& cache = StringToIntCache::instance();
int idx;
{
QReadLocker readLocker(&cache.lock);
idx = cache.map.value(str, -1);
}
if (Q_UNLIKELY(idx < 0)) {
QWriteLocker writeLocker(&cache.lock);
idx = cache.map.value(str, -1);
if (idx < 0) {
idx = cache.reverseMap.size();
Q_ASSERT(cache.map.size() == cache.reverseMap.size());
cache.map.insert(str, idx);
cache.reverseMap.append(str);
}
}
return idx;
}
QString StringToInt::lookupString(int idx)
{
auto& cache = StringToIntCache::instance();
QReadLocker readLocker(&cache.lock);
if (Q_LIKELY(cache.reverseMap.size() > idx))
return cache.reverseMap.at(idx);
return QString();
}
} // Render
} // Qt3DRender
QT_END_NAMESPACE
|
