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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.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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
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