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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 test suite 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 |
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43 #ifndef QSYSTEMLOCK_H |
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44 #define QSYSTEMLOCK_H |
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45 |
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46 #include <QtCore/qstring.h> |
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47 |
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48 QT_BEGIN_HEADER |
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49 |
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50 #ifndef QT_NO_SYSTEMLOCK |
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51 |
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52 QT_FORWARD_DECLARE_CLASS(QSystemLockPrivate) |
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53 |
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54 class QSystemLock |
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55 { |
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56 |
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57 public: |
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58 enum SystemLockError |
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59 { |
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60 NoError, |
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61 UnknownError |
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62 }; |
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63 |
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64 QSystemLock(const QString &key); |
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65 ~QSystemLock(); |
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66 |
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67 void setKey(const QString &key); |
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68 QString key() const; |
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69 |
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70 enum LockMode |
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71 { |
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72 ReadOnly, |
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73 ReadWrite |
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74 }; |
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75 |
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76 bool lock(LockMode mode = ReadWrite); |
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77 bool unlock(); |
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78 |
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79 SystemLockError error() const; |
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80 QString errorString() const; |
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81 |
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82 private: |
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83 Q_DISABLE_COPY(QSystemLock) |
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84 |
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85 QSystemLockPrivate *d; |
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86 }; |
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87 |
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88 class QSystemLocker |
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89 { |
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90 |
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91 public: |
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92 inline QSystemLocker(QSystemLock *systemLock, |
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93 QSystemLock::LockMode mode = QSystemLock::ReadWrite) : q_lock(systemLock) |
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94 { |
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95 autoUnLocked = relock(mode); |
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96 } |
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97 |
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98 inline ~QSystemLocker() |
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99 { |
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100 if (autoUnLocked) |
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101 unlock(); |
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102 } |
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103 |
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104 inline QSystemLock *systemLock() const |
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105 { |
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106 return q_lock; |
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107 } |
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108 |
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109 inline bool relock(QSystemLock::LockMode mode = QSystemLock::ReadWrite) |
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110 { |
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111 return (q_lock && q_lock->lock(mode)); |
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112 } |
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113 |
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114 inline bool unlock() |
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115 { |
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116 if (q_lock && q_lock->unlock()) { |
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117 autoUnLocked = false; |
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118 return true; |
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119 } |
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120 return false; |
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121 } |
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122 |
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123 private: |
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124 Q_DISABLE_COPY(QSystemLocker) |
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125 |
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126 bool autoUnLocked; |
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127 QSystemLock *q_lock; |
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128 }; |
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129 |
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130 #endif // QT_NO_SYSTEMLOCK |
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131 |
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132 QT_END_HEADER |
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133 |
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134 #endif // QSYSTEMLOCK_H |
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135 |