qatomic.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)
- **
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- **
- **
- ** 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
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- #ifndef QATOMIC_H
- #define QATOMIC_H
- #include <QtCore/qglobal.h>
- #include <QtCore/qbasicatomic.h>
- QT_BEGIN_HEADER
- QT_BEGIN_NAMESPACE
- QT_MODULE(Core)
- // High-level atomic integer operations
- class Q_CORE_EXPORT QAtomicInt : public QBasicAtomicInt
- {
- public:
- inline QAtomicInt(int value = 0)
- {
- #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;
- }
- inline QAtomicInt(const QAtomicInt &other)
- {
- #ifdef QT_ARCH_PARISC
- this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;
- #endif
- _q_value = other._q_value;
- }
- inline QAtomicInt &operator=(int value)
- {
- (void) QBasicAtomicInt::operator=(value);
- return *this;
- }
- inline QAtomicInt &operator=(const QAtomicInt &other)
- {
- (void) QBasicAtomicInt::operator=(other);
- return *this;
- }
- #ifdef qdoc
- bool operator==(int value) const;
- bool operator!=(int value) const;
- bool operator!() const;
- operator int() const;
- 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);
- #endif
- };
- // High-level atomic pointer operations
- template <typename T>
- class QAtomicPointer : public QBasicAtomicPointer<T>
- {
- public:
- inline QAtomicPointer(T *value = 0)
- {
- #ifdef QT_ARCH_PARISC
- this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;
- #endif
- QBasicAtomicPointer<T>::_q_value = value;
- }
- inline QAtomicPointer(const QAtomicPointer<T> &other)
- {
- #ifdef QT_ARCH_PARISC
- this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;
- #endif
- QBasicAtomicPointer<T>::_q_value = other._q_value;
- }
- inline QAtomicPointer<T> &operator=(T *value)
- {
- (void) QBasicAtomicPointer<T>::operator=(value);
- return *this;
- }
- inline QAtomicPointer<T> &operator=(const QAtomicPointer<T> &other)
- {
- (void) QBasicAtomicPointer<T>::operator=(other);
- return *this;
- }
- #ifdef qdoc
- bool operator==(T *value) const;
- bool operator!=(T *value) const;
- bool operator!() const;
- operator T *() const;
- T *operator->() const;
- 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);
- #endif
- };
- /*!
- This is a helper for the assignment operators of implicitly
- shared classes. Your assignment operator should look like this:
- snippet doc/src/snippets/code/src.corelib.thread.qatomic.h 0
- */
- template <typename T>
- inline void qAtomicAssign(T *&d, T *x)
- {
- if (d == x)
- return;
- x->ref.ref();
- if (!d->ref.deref())
- delete d;
- d = x;
- }
- /*!
- This is a helper for the detach method of implicitly shared
- classes. Your private class needs a copy constructor which copies
- the members and sets the refcount to 1. After that, your detach
- function should look like this:
- snippet doc/src/snippets/code/src.corelib.thread.qatomic.h 1
- */
- template <typename T>
- inline void qAtomicDetach(T *&d)
- {
- if (d->ref == 1)
- return;
- T *x = d;
- d = new T(*d);
- if (!x->ref.deref())
- delete x;
- }
- QT_END_NAMESPACE
- QT_END_HEADER
- #endif // QATOMIC_H