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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 QFUTRUESYNCHRONIZER_H |
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43 #define QFUTRUESYNCHRONIZER_H |
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44 |
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45 #include <QtCore/qfuture.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 QT_BEGIN_HEADER |
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50 QT_BEGIN_NAMESPACE |
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51 |
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52 QT_MODULE(Core) |
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53 |
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54 template <typename T> |
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55 class QFutureSynchronizer |
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56 { |
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57 Q_DISABLE_COPY(QFutureSynchronizer) |
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58 |
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59 public: |
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60 QFutureSynchronizer() : m_cancelOnWait(false) { } |
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61 explicit QFutureSynchronizer(const QFuture<T> &future) |
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62 : m_cancelOnWait(false) |
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63 { addFuture(future); } |
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64 ~QFutureSynchronizer() { waitForFinished(); } |
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65 |
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66 void setFuture(const QFuture<T> &future) |
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67 { |
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68 waitForFinished(); |
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69 m_futures.clear(); |
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70 addFuture(future); |
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71 } |
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72 |
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73 void addFuture(const QFuture<T> &future) |
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74 { |
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75 m_futures.append(future); |
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76 } |
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77 |
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78 void waitForFinished() |
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79 { |
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80 if (m_cancelOnWait) { |
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81 for (int i = 0; i < m_futures.count(); ++i) { |
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82 m_futures[i].cancel(); |
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83 } |
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84 } |
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85 |
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86 for (int i = 0; i < m_futures.count(); ++i) { |
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87 m_futures[i].waitForFinished(); |
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88 } |
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89 } |
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90 |
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91 void clearFutures() |
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92 { |
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93 m_futures.clear(); |
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94 } |
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95 |
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96 QList<QFuture<T> > futures() const |
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97 { |
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98 return m_futures; |
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99 } |
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100 |
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101 void setCancelOnWait(bool enabled) |
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102 { |
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103 m_cancelOnWait = enabled; |
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104 } |
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105 |
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106 bool cancelOnWait() const |
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107 { |
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108 return m_cancelOnWait; |
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109 } |
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110 |
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111 protected: |
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112 QList<QFuture<T> > m_futures; |
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113 bool m_cancelOnWait; |
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114 }; |
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115 |
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116 QT_END_NAMESPACE |
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117 QT_END_HEADER |
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118 |
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119 #endif // QT_NO_CONCURRENT |
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120 |
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121 #endif // QFUTRUESYNCHRONIZER_H |