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| ** |
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| ** This file is part of the QtCore module of the Qt Toolkit. |
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| |
| #ifndef QMUTEXPOOL_P_H |
| #define QMUTEXPOOL_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists for the convenience |
| // of QSettings. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include "QtCore/qatomic.h" |
| #include "QtCore/qmutex.h" |
| #include "QtCore/qvarlengtharray.h" |
| |
| #ifndef QT_NO_THREAD |
| |
| QT_BEGIN_NAMESPACE |
| |
| class Q_CORE_EXPORT QMutexPool |
| { |
| public: |
| explicit QMutexPool(QMutex::RecursionMode recursionMode = QMutex::NonRecursive, int size = 131); |
| ~QMutexPool(); |
| |
| inline QMutex *get(const void *address) { |
| int index = uint(quintptr(address)) % mutexes.count(); |
| QMutex *m = mutexes[index].load(); |
| if (m) |
| return m; |
| else |
| return createMutex(index); |
| } |
| static QMutexPool *instance(); |
| static QMutex *globalInstanceGet(const void *address); |
| |
| private: |
| QMutex *createMutex(int index); |
| QVarLengthArray<QAtomicPointer<QMutex>, 131> mutexes; |
| QMutex::RecursionMode recursionMode; |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QT_NO_THREAD |
| |
| #endif // QMUTEXPOOL_P_H |