/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the QtCore module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 3 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL3 included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 3 requirements ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 2.0 or (at your option) the GNU General ** Public license version 3 or any later version approved by the KDE Free ** Qt Foundation. The licenses are as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 ** included in the packaging of this file. Please review the following ** information to ensure the GNU General Public License requirements will ** be met: https://www.gnu.org/licenses/gpl-2.0.html and ** https://www.gnu.org/licenses/gpl-3.0.html. ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #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].load(); if (m) return m; else return createMutex(index); } static QMutexPool *instance(); static QMutex *globalInstanceGet(const void *address); private: QMutex *createMutex(int index); QVarLengthArray, 131> mutexes; QMutex::RecursionMode recursionMode; }; QT_END_NAMESPACE #endif // QT_NO_THREAD #endif // QMUTEXPOOL_P_H