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. |
36 | ** |
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 | |
53 | QT_BEGIN_HEADER |
54 | QT_BEGIN_NAMESPACE |
55 | |
56 | QT_MODULE(Core) |
57 | |
58 | #ifndef qdoc |
59 | |
60 | namespace QtConcurrent { |
61 | |
62 | template <typename T> |
63 | struct SelectSpecialization |
64 | { |
65 | template <class Normal, class Void> |
66 | struct Type { typedef Normal type; }; |
67 | }; |
68 | |
69 | template <> |
70 | struct SelectSpecialization<void> |
71 | { |
72 | template <class Normal, class Void> |
73 | struct Type { typedef Void type; }; |
74 | }; |
75 | |
76 | template <typename T> |
77 | class RunFunctionTaskBase : public QFutureInterface<T> , public QRunnable |
78 | { |
79 | public: |
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 | |
93 | template <typename T> |
94 | class RunFunctionTask : public RunFunctionTaskBase<T> |
95 | { |
96 | public: |
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 | |
121 | template <> |
122 | class RunFunctionTask<void> : public RunFunctionTaskBase<void> |
123 | { |
124 | public: |
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 | |
150 | QT_END_NAMESPACE |
151 | QT_END_HEADER |
152 | |
153 | #endif // QT_NO_CONCURRENT |
154 | |
155 | #endif |
156 | |