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| ** Copyright (C) 2011 Thiago Macieira <thiago@kde.org> |
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| |
| #ifndef QATOMIC_BOOTSTRAP_H |
| #define QATOMIC_BOOTSTRAP_H |
| |
| #include <QtCore/qgenericatomic.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| #if 0 |
| // silence syncqt warnings |
| QT_END_NAMESPACE |
| #pragma qt_sync_skip_header_check |
| #pragma qt_sync_stop_processing |
| #endif |
| |
| template <typename T> struct QAtomicOps: QGenericAtomicOps<QAtomicOps<T> > |
| { |
| typedef T Type; |
| |
| static bool ref(T &_q_value) noexcept |
| { |
| return ++_q_value != 0; |
| } |
| static bool deref(T &_q_value) noexcept |
| { |
| return --_q_value != 0; |
| } |
| |
| static bool testAndSetRelaxed(T &_q_value, T expectedValue, T newValue, T *currentValue = nullptr) noexcept |
| { |
| if (currentValue) |
| *currentValue = _q_value; |
| if (_q_value == expectedValue) { |
| _q_value = newValue; |
| return true; |
| } |
| return false; |
| } |
| |
| static T fetchAndStoreRelaxed(T &_q_value, T newValue) noexcept |
| { |
| T tmp = _q_value; |
| _q_value = newValue; |
| return tmp; |
| } |
| |
| template <typename AdditiveType> static |
| T fetchAndAddRelaxed(T &_q_value, AdditiveType valueToAdd) noexcept |
| { |
| T returnValue = _q_value; |
| _q_value += valueToAdd; |
| return returnValue; |
| } |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QATOMIC_BOOTSTRAP_H |