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1 /**************************************************************************** |
1 /**************************************************************************** |
2 ** |
2 ** |
3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
4 ** All rights reserved. |
4 ** All rights reserved. |
5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
6 ** |
6 ** |
7 ** This file is part of the QtCore module of the Qt Toolkit. |
7 ** This file is part of the QtCore module of the Qt Toolkit. |
8 ** |
8 ** |
93 |
93 |
94 class Q_CORE_EXPORT QMutexLocker |
94 class Q_CORE_EXPORT QMutexLocker |
95 { |
95 { |
96 public: |
96 public: |
97 inline explicit QMutexLocker(QMutex *m) |
97 inline explicit QMutexLocker(QMutex *m) |
98 : mtx(m) |
98 : val(reinterpret_cast<quintptr>(m)) |
99 { |
99 { |
100 Q_ASSERT_X((val & quintptr(1u)) == quintptr(0), |
100 Q_ASSERT_X((val & quintptr(1u)) == quintptr(0), |
101 "QMutexLocker", "QMutex pointer is misaligned"); |
101 "QMutexLocker", "QMutex pointer is misaligned"); |
102 relock(); |
102 relock(); |
103 } |
103 } |
104 inline ~QMutexLocker() { unlock(); } |
104 inline ~QMutexLocker() { unlock(); } |
105 |
105 |
106 inline void unlock() |
106 inline void unlock() |
107 { |
107 { |
108 if (mtx) { |
108 if (val) { |
109 if ((val & quintptr(1u)) == quintptr(1u)) { |
109 if ((val & quintptr(1u)) == quintptr(1u)) { |
110 val &= ~quintptr(1u); |
110 val &= ~quintptr(1u); |
111 mtx->unlock(); |
111 mutex()->unlock(); |
112 } |
112 } |
113 } |
113 } |
114 } |
114 } |
115 |
115 |
116 inline void relock() |
116 inline void relock() |
117 { |
117 { |
118 if (mtx) { |
118 if (val) { |
119 if ((val & quintptr(1u)) == quintptr(0u)) { |
119 if ((val & quintptr(1u)) == quintptr(0u)) { |
120 mtx->lock(); |
120 mutex()->lock(); |
121 val |= quintptr(1u); |
121 val |= quintptr(1u); |
122 } |
122 } |
123 } |
123 } |
124 } |
124 } |
125 |
125 |
138 #endif |
138 #endif |
139 |
139 |
140 private: |
140 private: |
141 Q_DISABLE_COPY(QMutexLocker) |
141 Q_DISABLE_COPY(QMutexLocker) |
142 |
142 |
143 union { |
143 quintptr val; |
144 QMutex *mtx; |
|
145 quintptr val; |
|
146 }; |
|
147 }; |
144 }; |
148 |
145 |
149 #else // QT_NO_THREAD |
146 #else // QT_NO_THREAD |
150 |
147 |
151 |
148 |