--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/corelib/thread/qatomic.h Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,227 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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 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