qbasicatomic.h
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上传日期:2022-06-22
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- /****************************************************************************
- **
- ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
- ** Contact: Qt Software Information (qt-info@nokia.com)
- **
- ** This file is part of the QtCore module of the Qt Toolkit.
- **
- ** Commercial Usage
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- ** 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 General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License versions 2.0 or 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 GNU General Public Licensing requirements will be met:
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- ** http://www.gnu.org/copyleft/gpl.html. In addition, as a special
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- ****************************************************************************/
- #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
- volatile int _q_value;
- // 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
- T * volatile _q_value;
- // 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)}
- #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