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Diffstat (limited to 'src/corelib/thread/qmutexpool_p.h')
-rw-r--r-- | src/corelib/thread/qmutexpool_p.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/corelib/thread/qmutexpool_p.h b/src/corelib/thread/qmutexpool_p.h new file mode 100644 index 0000000000..b2cd210d71 --- /dev/null +++ b/src/corelib/thread/qmutexpool_p.h @@ -0,0 +1,93 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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]; + 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; +}; + +extern Q_CORE_EXPORT QMutexPool *qt_global_mutexpool; + +QT_END_NAMESPACE + +#endif // QT_NO_THREAD + +#endif // QMUTEXPOOL_P_H |