qatomic_i386.h
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- /****************************************************************************
- **
- ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
- ** Contact: Qt Software Information (qt-info@nokia.com)
- **
- ** This file is part of the QtCore module of the Qt Toolkit.
- **
- ** Commercial Usage
- ** Licensees holding valid Qt Commercial licenses may use this file in
- ** accordance with the Qt Commercial License Agreement provided with the
- ** Software or, alternatively, in accordance with the terms contained in
- ** a written agreement between you and Nokia.
- **
- **
- ** GNU General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License versions 2.0 or 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 GNU General Public Licensing requirements will be met:
- ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
- ** http://www.gnu.org/copyleft/gpl.html. In addition, as a special
- ** exception, Nokia gives you certain additional rights. These rights
- ** are described in the Nokia Qt GPL Exception version 1.3, included in
- ** the file GPL_EXCEPTION.txt in this package.
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- ****************************************************************************/
- #ifndef QATOMIC_I386_H
- #define QATOMIC_I386_H
- QT_BEGIN_HEADER
- QT_BEGIN_NAMESPACE
- #define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_ALWAYS_NATIVE
- #define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_WAIT_FREE
- inline bool QBasicAtomicInt::isReferenceCountingNative()
- { return true; }
- inline bool QBasicAtomicInt::isReferenceCountingWaitFree()
- { return true; }
- #define Q_ATOMIC_INT_TEST_AND_SET_IS_ALWAYS_NATIVE
- #define Q_ATOMIC_INT_TEST_AND_SET_IS_WAIT_FREE
- inline bool QBasicAtomicInt::isTestAndSetNative()
- { return true; }
- inline bool QBasicAtomicInt::isTestAndSetWaitFree()
- { return true; }
- #define Q_ATOMIC_INT_FETCH_AND_STORE_IS_ALWAYS_NATIVE
- #define Q_ATOMIC_INT_FETCH_AND_STORE_IS_WAIT_FREE
- inline bool QBasicAtomicInt::isFetchAndStoreNative()
- { return true; }
- inline bool QBasicAtomicInt::isFetchAndStoreWaitFree()
- { return true; }
- #define Q_ATOMIC_INT_FETCH_AND_ADD_IS_ALWAYS_NATIVE
- #define Q_ATOMIC_INT_FETCH_AND_ADD_IS_WAIT_FREE
- inline bool QBasicAtomicInt::isFetchAndAddNative()
- { return true; }
- inline bool QBasicAtomicInt::isFetchAndAddWaitFree()
- { return true; }
- #define Q_ATOMIC_POINTER_TEST_AND_SET_IS_ALWAYS_NATIVE
- #define Q_ATOMIC_POINTER_TEST_AND_SET_IS_WAIT_FREE
- template <typename T>
- Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetNative()
- { return true; }
- template <typename T>
- Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetWaitFree()
- { return true; }
- #define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_ALWAYS_NATIVE
- #define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_WAIT_FREE
- template <typename T>
- Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndStoreNative()
- { return true; }
- template <typename T>
- Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndStoreWaitFree()
- { return true; }
- #define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_ALWAYS_NATIVE
- #define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_WAIT_FREE
- template <typename T>
- Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddNative()
- { return true; }
- template <typename T>
- Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddWaitFree()
- { return true; }
- #if defined(Q_CC_GNU) || defined(Q_CC_INTEL)
- inline bool QBasicAtomicInt::ref()
- {
- unsigned char ret;
- asm volatile("lockn"
- "incl %0n"
- "setne %1"
- : "=m" (_q_value), "=qm" (ret)
- : "m" (_q_value)
- : "memory");
- return ret != 0;
- }
- inline bool QBasicAtomicInt::deref()
- {
- unsigned char ret;
- asm volatile("lockn"
- "decl %0n"
- "setne %1"
- : "=m" (_q_value), "=qm" (ret)
- : "m" (_q_value)
- : "memory");
- return ret != 0;
- }
- inline bool QBasicAtomicInt::testAndSetOrdered(int expectedValue, int newValue)
- {
- unsigned char ret;
- asm volatile("lockn"
- "cmpxchgl %3,%2n"
- "sete %1n"
- : "=a" (newValue), "=qm" (ret), "+m" (_q_value)
- : "r" (newValue), "0" (expectedValue)
- : "memory");
- return ret != 0;
- }
- inline int QBasicAtomicInt::fetchAndStoreOrdered(int newValue)
- {
- asm volatile("xchgl %0,%1"
- : "=r" (newValue), "+m" (_q_value)
- : "0" (newValue)
- : "memory");
- return newValue;
- }
- inline int QBasicAtomicInt::fetchAndAddOrdered(int valueToAdd)
- {
- asm volatile("lockn"
- "xaddl %0,%1"
- : "=r" (valueToAdd), "+m" (_q_value)
- : "0" (valueToAdd)
- : "memory");
- return valueToAdd;
- }
- template <typename T>
- Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetOrdered(T *expectedValue, T *newValue)
- {
- unsigned char ret;
- asm volatile("lockn"
- "cmpxchgl %3,%2n"
- "sete %1n"
- : "=a" (newValue), "=qm" (ret), "+m" (_q_value)
- : "r" (newValue), "0" (expectedValue)
- : "memory");
- return ret != 0;
- }
- template <typename T>
- Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue)
- {
- asm volatile("xchgl %0,%1"
- : "=r" (newValue), "+m" (_q_value)
- : "0" (newValue)
- : "memory");
- return newValue;
- }
- template <typename T>
- Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddOrdered(qptrdiff valueToAdd)
- {
- asm volatile("lockn"
- "xaddl %0,%1"
- : "=r" (valueToAdd), "+m" (_q_value)
- : "0" (valueToAdd * sizeof(T))
- : "memory");
- return reinterpret_cast<T *>(valueToAdd);
- }
- #else
- extern "C" {
- Q_CORE_EXPORT int q_atomic_test_and_set_int(volatile int *ptr, int expected, int newval);
- Q_CORE_EXPORT int q_atomic_test_and_set_ptr(volatile void *ptr, void *expected, void *newval);
- Q_CORE_EXPORT int q_atomic_increment(volatile int *ptr);
- Q_CORE_EXPORT int q_atomic_decrement(volatile int *ptr);
- Q_CORE_EXPORT int q_atomic_set_int(volatile int *ptr, int newval);
- Q_CORE_EXPORT void *q_atomic_set_ptr(volatile void *ptr, void *newval);
- Q_CORE_EXPORT int q_atomic_fetch_and_add_int(volatile int *ptr, int value);
- Q_CORE_EXPORT void *q_atomic_fetch_and_add_ptr(volatile void *ptr, int value);
- } // extern "C"
- inline bool QBasicAtomicInt::ref()
- {
- return q_atomic_increment(&_q_value) != 0;
- }
- inline bool QBasicAtomicInt::deref()
- {
- return q_atomic_decrement(&_q_value) != 0;
- }
- inline bool QBasicAtomicInt::testAndSetOrdered(int expectedValue, int newValue)
- {
- return q_atomic_test_and_set_int(&_q_value, expectedValue, newValue) != 0;
- }
- inline int QBasicAtomicInt::fetchAndStoreOrdered(int newValue)
- {
- return q_atomic_set_int(&_q_value, newValue);
- }
- inline int QBasicAtomicInt::fetchAndAddOrdered(int valueToAdd)
- {
- return q_atomic_fetch_and_add_int(&_q_value, valueToAdd);
- }
- template <typename T>
- Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetOrdered(T *expectedValue, T *newValue)
- {
- return q_atomic_test_and_set_ptr(&_q_value, expectedValue, newValue);
- }
- template <typename T>
- Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue)
- {
- return reinterpret_cast<T *>(q_atomic_set_ptr(&_q_value, newValue));
- }
- template <typename T>
- Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddOrdered(qptrdiff valueToAdd)
- {
- return reinterpret_cast<T *>(q_atomic_fetch_and_add_ptr(&_q_value, valueToAdd * sizeof(T)));
- }
- #endif
- 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);
- }
- 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);
- }
- 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);
- }
- template <typename T>
- Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetRelaxed(T *expectedValue, T *newValue)
- {
- return testAndSetOrdered(expectedValue, newValue);
- }
- template <typename T>
- Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetAcquire(T *expectedValue, T *newValue)
- {
- return testAndSetOrdered(expectedValue, newValue);
- }
- template <typename T>
- Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetRelease(T *expectedValue, T *newValue)
- {
- return testAndSetOrdered(expectedValue, newValue);
- }
- template <typename T>
- Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreRelaxed(T *newValue)
- {
- return fetchAndStoreOrdered(newValue);
- }
- template <typename T>
- Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreAcquire(T *newValue)
- {
- return fetchAndStoreOrdered(newValue);
- }
- template <typename T>
- Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreRelease(T *newValue)
- {
- return fetchAndStoreOrdered(newValue);
- }
- template <typename T>
- Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddRelaxed(qptrdiff valueToAdd)
- {
- return fetchAndAddOrdered(valueToAdd);
- }
- template <typename T>
- Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddAcquire(qptrdiff valueToAdd)
- {
- return fetchAndAddOrdered(valueToAdd);
- }
- template <typename T>
- Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddRelease(qptrdiff valueToAdd)
- {
- return fetchAndAddOrdered(valueToAdd);
- }
- QT_END_NAMESPACE
- QT_END_HEADER
- #endif // QATOMIC_I386_H