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/****************************************************************************
**
** Copyright (C) 2010 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_ARMV6_H
#define QATOMIC_ARMV6_H
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
#define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_ALWAYS_NATIVE
inline bool QBasicAtomicInt::isReferenceCountingNative()
{ return true; }
inline bool QBasicAtomicInt::isReferenceCountingWaitFree()
{ return false; }
#define Q_ATOMIC_INT_TEST_AND_SET_IS_ALWAYS_NATIVE
inline bool QBasicAtomicInt::isTestAndSetNative()
{ return true; }
inline bool QBasicAtomicInt::isTestAndSetWaitFree()
{ return false; }
#define Q_ATOMIC_INT_FETCH_AND_STORE_IS_ALWAYS_NATIVE
inline bool QBasicAtomicInt::isFetchAndStoreNative()
{ return true; }
inline bool QBasicAtomicInt::isFetchAndStoreWaitFree()
{ return false; }
#define Q_ATOMIC_INT_FETCH_AND_ADD_IS_ALWAYS_NATIVE
inline bool QBasicAtomicInt::isFetchAndAddNative()
{ return true; }
inline bool QBasicAtomicInt::isFetchAndAddWaitFree()
{ return false; }
#define Q_ATOMIC_POINTER_TEST_AND_SET_IS_ALWAYS_NATIVE
template <typename T>
Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetNative()
{ return true; }
template <typename T>
Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetWaitFree()
{ return false; }
#define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_ALWAYS_NATIVE
template <typename T>
Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndStoreNative()
{ return true; }
template <typename T>
Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndStoreWaitFree()
{ return false; }
#define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_ALWAYS_NATIVE
template <typename T>
Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddNative()
{ return true; }
template <typename T>
Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddWaitFree()
{ return false; }
#ifndef Q_CC_RVCT
inline bool QBasicAtomicInt::ref()
{
register int newValue;
register int result;
asm volatile("0:\n"
"ldrex %[newValue], [%[_q_value]]\n"
"add %[newValue], %[newValue], #1\n"
"strex %[result], %[newValue], [%[_q_value]]\n"
"teq %[result], #0\n"
"bne 0b\n"
: [newValue] "=&r" (newValue),
[result] "=&r" (result),
"+m" (_q_value)
: [_q_value] "r" (&_q_value)
: "cc", "memory");
return newValue != 0;
}
inline bool QBasicAtomicInt::deref()
{
register int newValue;
register int result;
asm volatile("0:\n"
"ldrex %[newValue], [%[_q_value]]\n"
"sub %[newValue], %[newValue], #1\n"
"strex %[result], %[newValue], [%[_q_value]]\n"
"teq %[result], #0\n"
"bne 0b\n"
: [newValue] "=&r" (newValue),
[result] "=&r" (result),
"+m" (_q_value)
: [_q_value] "r" (&_q_value)
: "cc", "memory");
return newValue != 0;
}
inline bool QBasicAtomicInt::testAndSetOrdered(int expectedValue, int newValue)
{
register int result;
asm volatile("0:\n"
"ldrex %[result], [%[_q_value]]\n"
"eors %[result], %[result], %[expectedValue]\n"
"strexeq %[result], %[newValue], [%[_q_value]]\n"
"teqeq %[result], #1\n"
"beq 0b\n"
: [result] "=&r" (result),
"+m" (_q_value)
: [expectedValue] "r" (expectedValue),
[newValue] "r" (newValue),
[_q_value] "r" (&_q_value)
: "cc", "memory");
return result == 0;
}
inline int QBasicAtomicInt::fetchAndStoreOrdered(int newValue)
{
register int originalValue;
register int result;
asm volatile("0:\n"
"ldrex %[originalValue], [%[_q_value]]\n"
"strex %[result], %[newValue], [%[_q_value]]\n"
"teq %[result], #0\n"
"bne 0b\n"
: [originalValue] "=&r" (originalValue),
[result] "=&r" (result),
"+m" (_q_value)
: [newValue] "r" (newValue),
[_q_value] "r" (&_q_value)
: "cc", "memory");
return originalValue;
}
inline int QBasicAtomicInt::fetchAndAddOrdered(int valueToAdd)
{
register int originalValue;
register int newValue;
register int result;
asm volatile("0:\n"
"ldrex %[originalValue], [%[_q_value]]\n"
"add %[newValue], %[originalValue], %[valueToAdd]\n"
"strex %[result], %[newValue], [%[_q_value]]\n"
"teq %[result], #0\n"
"bne 0b\n"
: [originalValue] "=&r" (originalValue),
[newValue] "=&r" (newValue),
[result] "=&r" (result),
"+m" (_q_value)
: [valueToAdd] "r" (valueToAdd),
[_q_value] "r" (&_q_value)
: "cc", "memory");
return originalValue;
}
template <typename T>
Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetOrdered(T *expectedValue, T *newValue)
{
register T *result;
asm volatile("0:\n"
"ldrex %[result], [%[_q_value]]\n"
"eors %[result], %[result], %[expectedValue]\n"
"strexeq %[result], %[newValue], [%[_q_value]]\n"
"teqeq %[result], #1\n"
"beq 0b\n"
: [result] "=&r" (result),
"+m" (_q_value)
: [expectedValue] "r" (expectedValue),
[newValue] "r" (newValue),
[_q_value] "r" (&_q_value)
: "cc", "memory");
return result == 0;
}
template <typename T>
Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue)
{
register T *originalValue;
register int result;
asm volatile("0:\n"
"ldrex %[originalValue], [%[_q_value]]\n"
"strex %[result], %[newValue], [%[_q_value]]\n"
"teq %[result], #0\n"
"bne 0b\n"
: [originalValue] "=&r" (originalValue),
[result] "=&r" (result),
"+m" (_q_value)
: [newValue] "r" (newValue),
[_q_value] "r" (&_q_value)
: "cc", "memory");
return originalValue;
}
template <typename T>
Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddOrdered(qptrdiff valueToAdd)
{
register T *originalValue;
register T *newValue;
register int result;
asm volatile("0:\n"
"ldrex %[originalValue], [%[_q_value]]\n"
"add %[newValue], %[originalValue], %[valueToAdd]\n"
"strex %[result], %[newValue], [%[_q_value]]\n"
"teq %[result], #0\n"
"bne 0b\n"
: [originalValue] "=&r" (originalValue),
[newValue] "=&r" (newValue),
[result] "=&r" (result),
"+m" (_q_value)
: [valueToAdd] "r" (valueToAdd * sizeof(T)),
[_q_value] "r" (&_q_value)
: "cc", "memory");
return originalValue;
}
#else
// This is Q_CC_RVCT
// RVCT inline assembly documentation:
// http://www.keil.com/support/man/docs/armcc/armcc_chdcffdb.htm
// RVCT embedded assembly documentation:
// http://www.keil.com/support/man/docs/armcc/armcc_chddbeib.htm
// save our pragma state and switch to ARM mode
#pragma push
#pragma arm
inline bool QBasicAtomicInt::ref()
{
register int newValue;
register int result;
retry:
__asm {
ldrex newValue, [&_q_value]
add newValue, newValue, #1
strex result, newValue, [&_q_value]
teq result, #0
bne retry
}
return newValue != 0;
}
inline bool QBasicAtomicInt::deref()
{
register int newValue;
register int result;
retry:
__asm {
ldrex newValue, [&_q_value]
sub newValue, newValue, #1
strex result, newValue, [&_q_value]
teq result, #0
bne retry
}
return newValue != 0;
}
inline bool QBasicAtomicInt::testAndSetOrdered(int expectedValue, int newValue)
{
register int result;
retry:
__asm {
ldrex result, [&_q_value]
eors result, result, expectedValue
strexeq result, newValue, [&_q_value]
teqeq result, #1
beq retry
}
return result == 0;
}
inline int QBasicAtomicInt::fetchAndStoreOrdered(int newValue)
{
register int originalValue;
register int result;
retry:
__asm {
ldrex originalValue, [&_q_value]
strex result, newValue, [&_q_value]
teq result, #0
bne retry
}
return originalValue;
}
inline int QBasicAtomicInt::fetchAndAddOrdered(int valueToAdd)
{
register int originalValue;
register int newValue;
register int result;
retry:
__asm {
ldrex originalValue, [&_q_value]
add newValue, originalValue, valueToAdd
strex result, newValue, [&_q_value]
teq result, #0
bne retry
}
return originalValue;
}
template <typename T>
Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetOrdered(T *expectedValue, T *newValue)
{
register T *result;
retry:
__asm {
ldrex result, [&_q_value]
eors result, result, expectedValue
strexeq result, newValue, [&_q_value]
teqeq result, #1
beq retry
}
return result == 0;
}
template <typename T>
Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue)
{
register T *originalValue;
register int result;
retry:
__asm {
ldrex originalValue, [&_q_value]
strex result, newValue, [&_q_value]
teq result, #0
bne retry
}
return originalValue;
}
template <typename T>
Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddOrdered(qptrdiff valueToAdd)
{
register T *originalValue;
register T *newValue;
register int result;
retry:
__asm {
ldrex originalValue, [&_q_value]
add newValue, originalValue, valueToAdd * sizeof(T)
strex result, newValue, [&_q_value]
teq result, #0
bne retry
}
return originalValue;
}
// go back to the previous pragma state (probably Thumb mode)
#pragma pop
#endif
// common code
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_ARMV6_H
|
