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362 lines
11 KiB
362 lines
11 KiB
/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QATOMIC_I386_H
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#define QATOMIC_I386_H
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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#define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_ALWAYS_NATIVE
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#define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_WAIT_FREE
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inline bool QBasicAtomicInt::isReferenceCountingNative()
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{ return true; }
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inline bool QBasicAtomicInt::isReferenceCountingWaitFree()
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{ return true; }
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#define Q_ATOMIC_INT_TEST_AND_SET_IS_ALWAYS_NATIVE
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#define Q_ATOMIC_INT_TEST_AND_SET_IS_WAIT_FREE
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inline bool QBasicAtomicInt::isTestAndSetNative()
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{ return true; }
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inline bool QBasicAtomicInt::isTestAndSetWaitFree()
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{ return true; }
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#define Q_ATOMIC_INT_FETCH_AND_STORE_IS_ALWAYS_NATIVE
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#define Q_ATOMIC_INT_FETCH_AND_STORE_IS_WAIT_FREE
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inline bool QBasicAtomicInt::isFetchAndStoreNative()
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{ return true; }
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inline bool QBasicAtomicInt::isFetchAndStoreWaitFree()
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{ return true; }
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#define Q_ATOMIC_INT_FETCH_AND_ADD_IS_ALWAYS_NATIVE
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#define Q_ATOMIC_INT_FETCH_AND_ADD_IS_WAIT_FREE
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inline bool QBasicAtomicInt::isFetchAndAddNative()
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{ return true; }
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inline bool QBasicAtomicInt::isFetchAndAddWaitFree()
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{ return true; }
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#define Q_ATOMIC_POINTER_TEST_AND_SET_IS_ALWAYS_NATIVE
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#define Q_ATOMIC_POINTER_TEST_AND_SET_IS_WAIT_FREE
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetNative()
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{ return true; }
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetWaitFree()
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{ return true; }
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#define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_ALWAYS_NATIVE
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#define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_WAIT_FREE
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndStoreNative()
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{ return true; }
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndStoreWaitFree()
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{ return true; }
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#define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_ALWAYS_NATIVE
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#define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_WAIT_FREE
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddNative()
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{ return true; }
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddWaitFree()
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{ return true; }
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#if defined(Q_CC_GNU) || defined(Q_CC_INTEL)
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inline bool QBasicAtomicInt::ref()
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{
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unsigned char ret;
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asm volatile("lock\n"
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"incl %0\n"
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"setne %1"
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: "=m" (_q_value), "=qm" (ret)
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: "m" (_q_value)
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: "memory");
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return ret != 0;
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}
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inline bool QBasicAtomicInt::deref()
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{
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unsigned char ret;
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asm volatile("lock\n"
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"decl %0\n"
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"setne %1"
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: "=m" (_q_value), "=qm" (ret)
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: "m" (_q_value)
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: "memory");
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return ret != 0;
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}
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inline bool QBasicAtomicInt::testAndSetOrdered(int expectedValue, int newValue)
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{
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unsigned char ret;
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asm volatile("lock\n"
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"cmpxchgl %3,%2\n"
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"sete %1\n"
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: "=a" (newValue), "=qm" (ret), "+m" (_q_value)
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: "r" (newValue), "0" (expectedValue)
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: "memory");
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return ret != 0;
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}
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inline int QBasicAtomicInt::fetchAndStoreOrdered(int newValue)
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{
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asm volatile("xchgl %0,%1"
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: "=r" (newValue), "+m" (_q_value)
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: "0" (newValue)
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: "memory");
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return newValue;
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}
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inline int QBasicAtomicInt::fetchAndAddOrdered(int valueToAdd)
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{
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asm volatile("lock\n"
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"xaddl %0,%1"
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: "=r" (valueToAdd), "+m" (_q_value)
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: "0" (valueToAdd)
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: "memory");
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return valueToAdd;
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}
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetOrdered(T *expectedValue, T *newValue)
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{
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unsigned char ret;
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asm volatile("lock\n"
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"cmpxchgl %3,%2\n"
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"sete %1\n"
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: "=a" (newValue), "=qm" (ret), "+m" (_q_value)
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: "r" (newValue), "0" (expectedValue)
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: "memory");
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return ret != 0;
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue)
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{
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asm volatile("xchgl %0,%1"
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: "=r" (newValue), "+m" (_q_value)
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: "0" (newValue)
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: "memory");
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return newValue;
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddOrdered(qptrdiff valueToAdd)
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{
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asm volatile("lock\n"
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"xaddl %0,%1"
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: "=r" (valueToAdd), "+m" (_q_value)
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: "0" (valueToAdd * sizeof(T))
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: "memory");
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return reinterpret_cast<T *>(valueToAdd);
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}
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#else
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extern "C" {
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Q_CORE_EXPORT int q_atomic_test_and_set_int(volatile int *ptr, int expected, int newval);
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Q_CORE_EXPORT int q_atomic_test_and_set_ptr(volatile void *ptr, void *expected, void *newval);
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Q_CORE_EXPORT int q_atomic_increment(volatile int *ptr);
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Q_CORE_EXPORT int q_atomic_decrement(volatile int *ptr);
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Q_CORE_EXPORT int q_atomic_set_int(volatile int *ptr, int newval);
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Q_CORE_EXPORT void *q_atomic_set_ptr(volatile void *ptr, void *newval);
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Q_CORE_EXPORT int q_atomic_fetch_and_add_int(volatile int *ptr, int value);
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Q_CORE_EXPORT void *q_atomic_fetch_and_add_ptr(volatile void *ptr, int value);
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} // extern "C"
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inline bool QBasicAtomicInt::ref()
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{
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return q_atomic_increment(&_q_value) != 0;
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}
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inline bool QBasicAtomicInt::deref()
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{
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return q_atomic_decrement(&_q_value) != 0;
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}
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inline bool QBasicAtomicInt::testAndSetOrdered(int expectedValue, int newValue)
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{
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return q_atomic_test_and_set_int(&_q_value, expectedValue, newValue) != 0;
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}
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inline int QBasicAtomicInt::fetchAndStoreOrdered(int newValue)
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{
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return q_atomic_set_int(&_q_value, newValue);
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}
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inline int QBasicAtomicInt::fetchAndAddOrdered(int valueToAdd)
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{
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return q_atomic_fetch_and_add_int(&_q_value, valueToAdd);
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}
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetOrdered(T *expectedValue, T *newValue)
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{
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return q_atomic_test_and_set_ptr(&_q_value, expectedValue, newValue);
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue)
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{
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return reinterpret_cast<T *>(q_atomic_set_ptr(&_q_value, newValue));
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddOrdered(qptrdiff valueToAdd)
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{
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return reinterpret_cast<T *>(q_atomic_fetch_and_add_ptr(&_q_value, valueToAdd * sizeof(T)));
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}
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#endif
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inline bool QBasicAtomicInt::testAndSetRelaxed(int expectedValue, int newValue)
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{
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return testAndSetOrdered(expectedValue, newValue);
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}
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inline bool QBasicAtomicInt::testAndSetAcquire(int expectedValue, int newValue)
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{
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return testAndSetOrdered(expectedValue, newValue);
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}
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inline bool QBasicAtomicInt::testAndSetRelease(int expectedValue, int newValue)
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{
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return testAndSetOrdered(expectedValue, newValue);
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}
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inline int QBasicAtomicInt::fetchAndStoreRelaxed(int newValue)
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{
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return fetchAndStoreOrdered(newValue);
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}
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inline int QBasicAtomicInt::fetchAndStoreAcquire(int newValue)
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{
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return fetchAndStoreOrdered(newValue);
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}
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inline int QBasicAtomicInt::fetchAndStoreRelease(int newValue)
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{
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return fetchAndStoreOrdered(newValue);
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}
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inline int QBasicAtomicInt::fetchAndAddRelaxed(int valueToAdd)
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{
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return fetchAndAddOrdered(valueToAdd);
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}
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inline int QBasicAtomicInt::fetchAndAddAcquire(int valueToAdd)
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{
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return fetchAndAddOrdered(valueToAdd);
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}
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inline int QBasicAtomicInt::fetchAndAddRelease(int valueToAdd)
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{
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return fetchAndAddOrdered(valueToAdd);
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}
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetRelaxed(T *expectedValue, T *newValue)
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{
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return testAndSetOrdered(expectedValue, newValue);
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}
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetAcquire(T *expectedValue, T *newValue)
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{
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return testAndSetOrdered(expectedValue, newValue);
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}
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetRelease(T *expectedValue, T *newValue)
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{
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return testAndSetOrdered(expectedValue, newValue);
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreRelaxed(T *newValue)
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{
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return fetchAndStoreOrdered(newValue);
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreAcquire(T *newValue)
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{
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return fetchAndStoreOrdered(newValue);
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreRelease(T *newValue)
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{
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return fetchAndStoreOrdered(newValue);
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddRelaxed(qptrdiff valueToAdd)
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{
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return fetchAndAddOrdered(valueToAdd);
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddAcquire(qptrdiff valueToAdd)
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{
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return fetchAndAddOrdered(valueToAdd);
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddRelease(qptrdiff valueToAdd)
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{
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return fetchAndAddOrdered(valueToAdd);
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}
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif // QATOMIC_I386_H
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