/**************************************************************************** ** ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/ ** ** This file is part of the QtGui 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_INTEGRITY_H #define QATOMIC_INTEGRITY_H #include #include QT_BEGIN_HEADER QT_BEGIN_NAMESPACE #define qt_i2addr(a) reinterpret_cast
(const_cast(a)) #define qt_p2addr(a) reinterpret_cast
(const_cast(a)) #define qt_addr(a) reinterpret_cast
(a) #define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_NOT_NATIVE inline bool QBasicAtomicInt::isReferenceCountingNative() { return false; } inline bool QBasicAtomicInt::isReferenceCountingWaitFree() { return false; } #define Q_ATOMIC_INT_TEST_AND_SET_IS_NOT_NATIVE inline bool QBasicAtomicInt::isTestAndSetNative() { return true; } inline bool QBasicAtomicInt::isTestAndSetWaitFree() { return true; } #define Q_ATOMIC_INT_FETCH_AND_STORE_IS_NOT_NATIVE inline bool QBasicAtomicInt::isFetchAndStoreNative() { return true; } inline bool QBasicAtomicInt::isFetchAndStoreWaitFree() { return true; } #define Q_ATOMIC_INT_FETCH_AND_ADD_IS_NOT_NATIVE inline bool QBasicAtomicInt::isFetchAndAddNative() { return true; } inline bool QBasicAtomicInt::isFetchAndAddWaitFree() { return true; } #define Q_ATOMIC_POINTER_TEST_AND_SET_IS_NOT_NATIVE template Q_INLINE_TEMPLATE bool QBasicAtomicPointer::isTestAndSetNative() { return true; } template Q_INLINE_TEMPLATE bool QBasicAtomicPointer::isTestAndSetWaitFree() { return true; } #define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_NOT_NATIVE template Q_INLINE_TEMPLATE bool QBasicAtomicPointer::isFetchAndStoreNative() { return true; } template Q_INLINE_TEMPLATE bool QBasicAtomicPointer::isFetchAndStoreWaitFree() { return true; } #define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_NOT_NATIVE template Q_INLINE_TEMPLATE bool QBasicAtomicPointer::isFetchAndAddNative() { return true; } template Q_INLINE_TEMPLATE bool QBasicAtomicPointer::isFetchAndAddWaitFree() { return true; } // Reference counting inline bool QBasicAtomicInt::ref() { int oldval; AtomicModify(qt_i2addr(&_q_value), qt_i2addr(&oldval), 0, 1); return _q_value != -1; } inline bool QBasicAtomicInt::deref() { int oldval; AtomicModify(qt_i2addr(&_q_value), qt_i2addr(&oldval), 0, -1U); return _q_value != 0; } // Test and set for integers inline bool QBasicAtomicInt::testAndSetOrdered(int expectedValue, int newValue) { return TestAndSet(qt_i2addr(&_q_value), expectedValue, newValue) == Success; } inline bool QBasicAtomicInt::testAndSetRelaxed(int expectedValue, int newValue) { return testAndSetOrdered(expectedValue, newValue); } inline bool QBasicAtomicInt::testAndSetAcquire(int expectedValue, int newValue) { return testAndSetOrdered(expectedValue, newValue); } inline bool QBasicAtomicInt::testAndSetRelease(int expectedValue, int newValue) { return testAndSetOrdered(expectedValue, newValue); } // Fetch and store for integers inline int QBasicAtomicInt::fetchAndStoreOrdered(int newValue) { int old_val; do { old_val = _q_value; } while (TestAndSet(qt_i2addr(&_q_value), old_val, newValue) != Success); return old_val; } inline int QBasicAtomicInt::fetchAndStoreRelaxed(int newValue) { return fetchAndStoreOrdered(newValue); } inline int QBasicAtomicInt::fetchAndStoreAcquire(int newValue) { return fetchAndStoreOrdered(newValue); } inline int QBasicAtomicInt::fetchAndStoreRelease(int newValue) { return fetchAndStoreOrdered(newValue); } // Fetch and add for integers inline int QBasicAtomicInt::fetchAndAddOrdered(int valueToAdd) { int old_val; do { old_val = _q_value; } while (TestAndSet(qt_i2addr(&_q_value), old_val, old_val + valueToAdd) != Success); return old_val; } inline int QBasicAtomicInt::fetchAndAddRelaxed(int valueToAdd) { return fetchAndAddOrdered(valueToAdd); } inline int QBasicAtomicInt::fetchAndAddAcquire(int valueToAdd) { return fetchAndAddOrdered(valueToAdd); } inline int QBasicAtomicInt::fetchAndAddRelease(int valueToAdd) { return fetchAndAddOrdered(valueToAdd); } // Test and set for pointers template Q_INLINE_TEMPLATE bool QBasicAtomicPointer::testAndSetOrdered(T *expectedValue, T *newValue) { return TestAndSet((Address*)&_q_value, qt_addr(expectedValue), qt_addr(newValue)) == Success; } template Q_INLINE_TEMPLATE bool QBasicAtomicPointer::testAndSetRelaxed(T *expectedValue, T *newValue) { return testAndSetOrdered(expectedValue, newValue); } template Q_INLINE_TEMPLATE bool QBasicAtomicPointer::testAndSetAcquire(T *expectedValue, T *newValue) { return testAndSetOrdered(expectedValue, newValue); } template Q_INLINE_TEMPLATE bool QBasicAtomicPointer::testAndSetRelease(T *expectedValue, T *newValue) { return testAndSetOrdered(expectedValue, newValue); } // Fetch and store for pointers template Q_INLINE_TEMPLATE T *QBasicAtomicPointer::fetchAndStoreOrdered(T *newValue) { Address old_val; do { old_val = *reinterpret_cast
(const_cast(newValue)); } while (TestAndSet(reinterpret_cast
(const_cast(&_q_value)), old_val, qt_addr(newValue)) != Success); return reinterpret_cast(old_val); } template Q_INLINE_TEMPLATE T *QBasicAtomicPointer::fetchAndStoreRelaxed(T *newValue) { return fetchAndStoreOrdered(newValue); } template Q_INLINE_TEMPLATE T *QBasicAtomicPointer::fetchAndStoreAcquire(T *newValue) { return fetchAndStoreOrdered(newValue); } template Q_INLINE_TEMPLATE T *QBasicAtomicPointer::fetchAndStoreRelease(T *newValue) { return fetchAndStoreOrdered(newValue); } // Fetch and add for pointers template Q_INLINE_TEMPLATE T *QBasicAtomicPointer::fetchAndAddOrdered(qptrdiff valueToAdd) { AtomicModify(qt_p2addr(&_q_value), qt_addr(_q_value), qt_addr(_q_value) + valueToAdd * sizeof(T)); return _q_value; } template Q_INLINE_TEMPLATE T *QBasicAtomicPointer::fetchAndAddRelaxed(qptrdiff valueToAdd) { return fetchAndAddOrdered(valueToAdd); } template Q_INLINE_TEMPLATE T *QBasicAtomicPointer::fetchAndAddAcquire(qptrdiff valueToAdd) { return fetchAndAddOrdered(valueToAdd); } template Q_INLINE_TEMPLATE T *QBasicAtomicPointer::fetchAndAddRelease(qptrdiff valueToAdd) { return fetchAndAddOrdered(valueToAdd); } QT_END_NAMESPACE QT_END_HEADER #endif // QATOMIC_INTEGRITY_H