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Diffstat (limited to 'src/corelib/thread/qbasicatomic.h')
| -rw-r--r-- | src/corelib/thread/qbasicatomic.h | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/src/corelib/thread/qbasicatomic.h b/src/corelib/thread/qbasicatomic.h new file mode 100644 index 0000000000..72fd55ad7f --- /dev/null +++ b/src/corelib/thread/qbasicatomic.h @@ -0,0 +1,230 @@ +/**************************************************************************** +** +** 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 QBASICATOMIC_H +#define QBASICATOMIC_H + +#include <QtCore/qglobal.h> + +QT_BEGIN_HEADER + +QT_BEGIN_NAMESPACE + +QT_MODULE(Core) + +class Q_CORE_EXPORT QBasicAtomicInt +{ +public: +#ifdef QT_ARCH_PARISC + int _q_lock[4]; +#endif +#if defined(QT_ARCH_WINDOWS) || defined(QT_ARCH_WINDOWSCE) + union { // needed for Q_BASIC_ATOMIC_INITIALIZER + volatile long _q_value; + }; +#else + volatile int _q_value; +#endif + + // Non-atomic API + inline bool operator==(int value) const + { + return _q_value == value; + } + + inline bool operator!=(int value) const + { + return _q_value != value; + } + + inline bool operator!() const + { + return _q_value == 0; + } + + inline operator int() const + { + return _q_value; + } + + inline QBasicAtomicInt &operator=(int value) + { +#ifdef QT_ARCH_PARISC + this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1; +#endif + _q_value = value; + return *this; + } + + // Atomic API, implemented in qatomic_XXX.h + + static bool isReferenceCountingNative(); + static bool isReferenceCountingWaitFree(); + + bool ref(); + bool deref(); + + static bool isTestAndSetNative(); + static bool isTestAndSetWaitFree(); + + bool testAndSetRelaxed(int expectedValue, int newValue); + bool testAndSetAcquire(int expectedValue, int newValue); + bool testAndSetRelease(int expectedValue, int newValue); + bool testAndSetOrdered(int expectedValue, int newValue); + + static bool isFetchAndStoreNative(); + static bool isFetchAndStoreWaitFree(); + + int fetchAndStoreRelaxed(int newValue); + int fetchAndStoreAcquire(int newValue); + int fetchAndStoreRelease(int newValue); + int fetchAndStoreOrdered(int newValue); + + static bool isFetchAndAddNative(); + static bool isFetchAndAddWaitFree(); + + int fetchAndAddRelaxed(int valueToAdd); + int fetchAndAddAcquire(int valueToAdd); + int fetchAndAddRelease(int valueToAdd); + int fetchAndAddOrdered(int valueToAdd); +}; + +template <typename T> +class QBasicAtomicPointer +{ +public: +#ifdef QT_ARCH_PARISC + int _q_lock[4]; +#endif +#if defined(QT_ARCH_WINDOWS) || defined(QT_ARCH_WINDOWSCE) + union { + T * volatile _q_value; +# if !defined(Q_OS_WINCE) && !defined(__i386__) && !defined(_M_IX86) + qint64 +# else + long +# endif + volatile _q_value_integral; + }; +#else + T * volatile _q_value; +#endif + + // Non-atomic API + inline bool operator==(T *value) const + { + return _q_value == value; + } + + inline bool operator!=(T *value) const + { + return !operator==(value); + } + + inline bool operator!() const + { + return operator==(0); + } + + inline operator T *() const + { + return _q_value; + } + + inline T *operator->() const + { + return _q_value; + } + + inline QBasicAtomicPointer<T> &operator=(T *value) + { +#ifdef QT_ARCH_PARISC + this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1; +#endif + _q_value = value; + return *this; + } + + // Atomic API, implemented in qatomic_XXX.h + + static bool isTestAndSetNative(); + static bool isTestAndSetWaitFree(); + + bool testAndSetRelaxed(T *expectedValue, T *newValue); + bool testAndSetAcquire(T *expectedValue, T *newValue); + bool testAndSetRelease(T *expectedValue, T *newValue); + bool testAndSetOrdered(T *expectedValue, T *newValue); + + static bool isFetchAndStoreNative(); + static bool isFetchAndStoreWaitFree(); + + T *fetchAndStoreRelaxed(T *newValue); + T *fetchAndStoreAcquire(T *newValue); + T *fetchAndStoreRelease(T *newValue); + T *fetchAndStoreOrdered(T *newValue); + + static bool isFetchAndAddNative(); + static bool isFetchAndAddWaitFree(); + + T *fetchAndAddRelaxed(qptrdiff valueToAdd); + T *fetchAndAddAcquire(qptrdiff valueToAdd); + T *fetchAndAddRelease(qptrdiff valueToAdd); + T *fetchAndAddOrdered(qptrdiff valueToAdd); +}; + +#ifdef QT_ARCH_PARISC +# define Q_BASIC_ATOMIC_INITIALIZER(a) {{-1,-1,-1,-1},(a)} +#elif defined(QT_ARCH_WINDOWS) || defined(QT_ARCH_WINDOWSCE) +# define Q_BASIC_ATOMIC_INITIALIZER(a) { {(a)} } +#else +# define Q_BASIC_ATOMIC_INITIALIZER(a) { (a) } +#endif + +QT_END_NAMESPACE +QT_END_HEADER + +#if defined(QT_MOC) || defined(QT_BUILD_QMAKE) || defined(QT_RCC) || defined(QT_UIC) || defined(QT_BOOTSTRAPPED) +# include <QtCore/qatomic_bootstrap.h> +#else +# include <QtCore/qatomic_arch.h> +#endif + +#endif // QBASIC_ATOMIC |