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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtCore module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #ifndef QTCONCURRENT_RUNBASE_H |
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43 #define QTCONCURRENT_RUNBASE_H |
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44 |
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45 #include <QtCore/qglobal.h> |
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46 |
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47 #ifndef QT_NO_CONCURRENT |
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48 |
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49 #include <QtCore/qfuture.h> |
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50 #include <QtCore/qrunnable.h> |
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51 #include <QtCore/qthreadpool.h> |
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52 |
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53 QT_BEGIN_HEADER |
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54 QT_BEGIN_NAMESPACE |
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55 |
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56 QT_MODULE(Core) |
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57 |
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58 #ifndef qdoc |
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59 |
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60 namespace QtConcurrent { |
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61 |
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62 template <typename T> |
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63 struct SelectSpecialization |
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64 { |
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65 template <class Normal, class Void> |
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66 struct Type { typedef Normal type; }; |
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67 }; |
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68 |
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69 template <> |
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70 struct SelectSpecialization<void> |
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71 { |
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72 template <class Normal, class Void> |
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73 struct Type { typedef Void type; }; |
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74 }; |
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75 |
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76 template <typename T> |
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77 class RunFunctionTaskBase : public QFutureInterface<T> , public QRunnable |
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78 { |
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79 public: |
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80 QFuture<T> start() |
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81 { |
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82 this->setRunnable(this); |
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83 this->reportStarted(); |
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84 QFuture<T> future = this->future(); |
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85 QThreadPool::globalInstance()->start(this, /*m_priority*/ 0); |
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86 return future; |
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87 } |
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88 |
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89 void run() {} |
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90 virtual void runFunctor() = 0; |
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91 }; |
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92 |
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93 template <typename T> |
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94 class RunFunctionTask : public RunFunctionTaskBase<T> |
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95 { |
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96 public: |
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97 void run() |
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98 { |
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99 if (this->isCanceled()) { |
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100 this->reportFinished(); |
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101 return; |
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102 } |
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103 this->runFunctor(); |
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104 this->reportResult(result); |
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105 this->reportFinished(); |
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106 } |
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107 T result; |
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108 }; |
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109 |
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110 template <> |
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111 class RunFunctionTask<void> : public RunFunctionTaskBase<void> |
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112 { |
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113 public: |
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114 void run() |
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115 { |
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116 if (this->isCanceled()) { |
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117 this->reportFinished(); |
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118 return; |
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119 } |
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120 this->runFunctor(); |
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121 this->reportFinished(); |
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122 } |
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123 }; |
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124 |
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125 } //namespace QtConcurrent |
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126 |
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127 #endif //qdoc |
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128 |
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129 QT_END_NAMESPACE |
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130 QT_END_HEADER |
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131 |
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132 #endif // QT_NO_CONCURRENT |
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133 |
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134 #endif |