1/****************************************************************************
2**
3** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
4** Contact: http://www.qt-project.org/legal
5**
6** This file is part of the QtCore module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and Digia. For licensing terms and
14** conditions see http://qt.digia.com/licensing. For further information
15** use the contact form at http://qt.digia.com/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 2.1 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 2.1 requirements
23** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
24**
25** In addition, as a special exception, Digia gives you certain additional
26** rights. These rights are described in the Digia Qt LGPL Exception
27** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
28**
29** GNU General Public License Usage
30** Alternatively, this file may be used under the terms of the GNU
31** General Public License version 3.0 as published by the Free Software
32** Foundation and appearing in the file LICENSE.GPL included in the
33** packaging of this file. Please review the following information to
34** ensure the GNU General Public License version 3.0 requirements will be
35** met: http://www.gnu.org/copyleft/gpl.html.
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37**
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#ifndef QTCONCURRENT_RUNBASE_H
43#define QTCONCURRENT_RUNBASE_H
44
45#include <QtCore/qglobal.h>
46
47#ifndef QT_NO_CONCURRENT
48
49#include <QtCore/qfuture.h>
50#include <QtCore/qrunnable.h>
51#include <QtCore/qthreadpool.h>
52
53QT_BEGIN_HEADER
54QT_BEGIN_NAMESPACE
55
56QT_MODULE(Core)
57
58#ifndef qdoc
59
60namespace QtConcurrent {
61
62template <typename T>
63struct SelectSpecialization
64{
65 template <class Normal, class Void>
66 struct Type { typedef Normal type; };
67};
68
69template <>
70struct SelectSpecialization<void>
71{
72 template <class Normal, class Void>
73 struct Type { typedef Void type; };
74};
75
76template <typename T>
77class RunFunctionTaskBase : public QFutureInterface<T> , public QRunnable
78{
79public:
80 QFuture<T> start()
81 {
82 this->setRunnable(this);
83 this->reportStarted();
84 QFuture<T> future = this->future();
85 QThreadPool::globalInstance()->start(this, /*m_priority*/ 0);
86 return future;
87 }
88
89 void run() {}
90 virtual void runFunctor() = 0;
91};
92
93template <typename T>
94class RunFunctionTask : public RunFunctionTaskBase<T>
95{
96public:
97 void run()
98 {
99 if (this->isCanceled()) {
100 this->reportFinished();
101 return;
102 }
103#ifndef QT_NO_EXCEPTIONS
104 try {
105#endif
106 this->runFunctor();
107#ifndef QT_NO_EXCEPTIONS
108 } catch (QtConcurrent::Exception &e) {
109 QFutureInterface<T>::reportException(e);
110 } catch (...) {
111 QFutureInterface<T>::reportException(QtConcurrent::UnhandledException());
112 }
113#endif
114
115 this->reportResult(result);
116 this->reportFinished();
117 }
118 T result;
119};
120
121template <>
122class RunFunctionTask<void> : public RunFunctionTaskBase<void>
123{
124public:
125 void run()
126 {
127 if (this->isCanceled()) {
128 this->reportFinished();
129 return;
130 }
131#ifndef QT_NO_EXCEPTIONS
132 try {
133#endif
134 this->runFunctor();
135#ifndef QT_NO_EXCEPTIONS
136 } catch (QtConcurrent::Exception &e) {
137 QFutureInterface<void>::reportException(e);
138 } catch (...) {
139 QFutureInterface<void>::reportException(QtConcurrent::UnhandledException());
140 }
141#endif
142 this->reportFinished();
143 }
144};
145
146} //namespace QtConcurrent
147
148#endif //qdoc
149
150QT_END_NAMESPACE
151QT_END_HEADER
152
153#endif // QT_NO_CONCURRENT
154
155#endif
156