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/****************************************************************************
**
** 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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
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