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Diffstat (limited to 'qtinterface/qt4/Qt/qmutex.h')
| -rw-r--r-- | qtinterface/qt4/Qt/qmutex.h | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/qtinterface/qt4/Qt/qmutex.h b/qtinterface/qt4/Qt/qmutex.h new file mode 100644 index 0000000..8b5663f --- /dev/null +++ b/qtinterface/qt4/Qt/qmutex.h @@ -0,0 +1,193 @@ +/**************************************************************************** +** +** Copyright (C) 2010 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. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial Usage +** Licensees holding valid Qt Commercial licenses may use this file in +** accordance with the Qt Commercial License Agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Nokia. +** +** 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. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QMUTEX_H +#define QMUTEX_H + +#include <QtCore/qglobal.h> +#include <new> + +QT_BEGIN_HEADER + +QT_BEGIN_NAMESPACE + +QT_MODULE(Core) + +#ifndef QT_NO_THREAD + +class QMutexPrivate; + +class Q_CORE_EXPORT QMutex +{ + friend class QWaitCondition; + friend class QWaitConditionPrivate; + +public: + enum RecursionMode { NonRecursive, Recursive }; + + explicit QMutex(RecursionMode mode = NonRecursive); + ~QMutex(); + + void lock(); + bool tryLock(); + bool tryLock(int timeout); + void unlock(); + +#if defined(QT3_SUPPORT) + inline QT3_SUPPORT bool locked() + { + if (!tryLock()) + return true; + unlock(); + return false; + } + inline QT3_SUPPORT_CONSTRUCTOR QMutex(bool recursive) + { + new (this) QMutex(recursive ? Recursive : NonRecursive); + } +#endif + +private: + Q_DISABLE_COPY(QMutex) + + QMutexPrivate *d; +}; + +class Q_CORE_EXPORT QMutexLocker +{ +public: + inline explicit QMutexLocker(QMutex *m) + : mtx(m) + { + Q_ASSERT_X((val & quintptr(1u)) == quintptr(0), + "QMutexLocker", "QMutex pointer is misaligned"); + relock(); + } + inline ~QMutexLocker() { unlock(); } + + inline void unlock() + { + if (mtx) { + if ((val & quintptr(1u)) == quintptr(1u)) { + val &= ~quintptr(1u); + mtx->unlock(); + } + } + } + + inline void relock() + { + if (mtx) { + if ((val & quintptr(1u)) == quintptr(0u)) { + mtx->lock(); + val |= quintptr(1u); + } + } + } + +#if defined(Q_CC_MSVC) +#pragma warning( push ) +#pragma warning( disable : 4312 ) // ignoring the warning from /Wp64 +#endif + + inline QMutex *mutex() const + { + return reinterpret_cast<QMutex *>(val & ~quintptr(1u)); + } + +#if defined(Q_CC_MSVC) +#pragma warning( pop ) +#endif + +private: + Q_DISABLE_COPY(QMutexLocker) + + union { + QMutex *mtx; + quintptr val; + }; +}; + +#else // QT_NO_THREAD + + +class Q_CORE_EXPORT QMutex +{ +public: + enum RecursionMode { NonRecursive, Recursive }; + + inline explicit QMutex(RecursionMode mode = NonRecursive) { Q_UNUSED(mode); } + inline ~QMutex() {} + + static inline void lock() {} + static inline bool tryLock() { return true; } + static inline bool tryLock(int timeout) { Q_UNUSED(timeout); return true; } + static void unlock() {} + +#if defined(QT3_SUPPORT) + static inline QT3_SUPPORT bool locked() { return false; } +#endif + +private: + Q_DISABLE_COPY(QMutex) +}; + +class Q_CORE_EXPORT QMutexLocker +{ +public: + inline explicit QMutexLocker(QMutex *) {} + inline ~QMutexLocker() {} + + static inline void unlock() {} + static void relock() {} + static inline QMutex *mutex() { return 0; } + +private: + Q_DISABLE_COPY(QMutexLocker) +}; + +#endif // QT_NO_THREAD + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif // QMUTEX_H |