You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
432 lines
12 KiB
432 lines
12 KiB
/****************************************************************************
|
|
**
|
|
** 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.
|
|
**
|
|
** $QT_BEGIN_LICENSE:LGPL$
|
|
** 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 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.
|
|
**
|
|
** 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.
|
|
**
|
|
** If you have questions regarding the use of this file, please contact
|
|
** Nokia at qt-info@nokia.com.
|
|
** $QT_END_LICENSE$
|
|
**
|
|
****************************************************************************/
|
|
|
|
#ifndef QATOMIC_ARM_H
|
|
#define QATOMIC_ARM_H
|
|
|
|
QT_BEGIN_HEADER
|
|
|
|
QT_BEGIN_NAMESPACE
|
|
|
|
#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 false; }
|
|
inline bool QBasicAtomicInt::isTestAndSetWaitFree()
|
|
{ return false; }
|
|
|
|
#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_NOT_NATIVE
|
|
|
|
inline bool QBasicAtomicInt::isFetchAndAddNative()
|
|
{ return false; }
|
|
inline bool QBasicAtomicInt::isFetchAndAddWaitFree()
|
|
{ return false; }
|
|
|
|
#define Q_ATOMIC_POINTER_TEST_AND_SET_IS_NOT_NATIVE
|
|
|
|
template <typename T>
|
|
Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetNative()
|
|
{ return false; }
|
|
template <typename T>
|
|
Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetWaitFree()
|
|
{ return false; }
|
|
|
|
#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_NOT_NATIVE
|
|
|
|
template <typename T>
|
|
Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddNative()
|
|
{ return false; }
|
|
template <typename T>
|
|
Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddWaitFree()
|
|
{ return false; }
|
|
|
|
#ifndef QT_NO_ARM_EABI
|
|
|
|
// kernel places a restartable cmpxchg implementation at a fixed address
|
|
extern "C" typedef int (qt_atomic_eabi_cmpxchg_int_t)(int oldval, int newval, volatile int *ptr);
|
|
extern "C" typedef int (qt_atomic_eabi_cmpxchg_ptr_t)(void *oldval, void *newval, volatile void *ptr);
|
|
#define qt_atomic_eabi_cmpxchg_int (*(qt_atomic_eabi_cmpxchg_int_t *)0xffff0fc0)
|
|
#define qt_atomic_eabi_cmpxchg_ptr (*(qt_atomic_eabi_cmpxchg_ptr_t *)0xffff0fc0)
|
|
|
|
#else
|
|
|
|
extern Q_CORE_EXPORT char q_atomic_lock;
|
|
Q_CORE_EXPORT void qt_atomic_yield(int *);
|
|
|
|
#ifdef Q_CC_RVCT
|
|
|
|
Q_CORE_EXPORT __asm char q_atomic_swp(volatile char *ptr, char newval);
|
|
|
|
#else
|
|
|
|
inline char q_atomic_swp(volatile char *ptr, char newval)
|
|
{
|
|
register char ret;
|
|
asm volatile("swpb %0,%2,[%3]"
|
|
: "=&r"(ret), "=m" (*ptr)
|
|
: "r"(newval), "r"(ptr)
|
|
: "cc", "memory");
|
|
return ret;
|
|
}
|
|
|
|
#endif // Q_CC_RVCT
|
|
|
|
#endif // QT_NO_ARM_EABI
|
|
|
|
// Reference counting
|
|
|
|
inline bool QBasicAtomicInt::ref()
|
|
{
|
|
#ifndef QT_NO_ARM_EABI
|
|
register int originalValue;
|
|
register int newValue;
|
|
do {
|
|
originalValue = _q_value;
|
|
newValue = originalValue + 1;
|
|
} while (qt_atomic_eabi_cmpxchg_int(originalValue, newValue, &_q_value) != 0);
|
|
return newValue != 0;
|
|
#else
|
|
int count = 0;
|
|
while (q_atomic_swp(&q_atomic_lock, ~0) != 0)
|
|
qt_atomic_yield(&count);
|
|
int originalValue = _q_value++;
|
|
q_atomic_swp(&q_atomic_lock, 0);
|
|
return originalValue != -1;
|
|
#endif
|
|
}
|
|
|
|
inline bool QBasicAtomicInt::deref()
|
|
{
|
|
#ifndef QT_NO_ARM_EABI
|
|
register int originalValue;
|
|
register int newValue;
|
|
do {
|
|
originalValue = _q_value;
|
|
newValue = originalValue - 1;
|
|
} while (qt_atomic_eabi_cmpxchg_int(originalValue, newValue, &_q_value) != 0);
|
|
return newValue != 0;
|
|
#else
|
|
int count = 0;
|
|
while (q_atomic_swp(&q_atomic_lock, ~0) != 0)
|
|
qt_atomic_yield(&count);
|
|
int originalValue = _q_value--;
|
|
q_atomic_swp(&q_atomic_lock, 0);
|
|
return originalValue != 1;
|
|
#endif
|
|
}
|
|
|
|
// Test and set for integers
|
|
|
|
inline bool QBasicAtomicInt::testAndSetOrdered(int expectedValue, int newValue)
|
|
{
|
|
#ifndef QT_NO_ARM_EABI
|
|
register int originalValue;
|
|
do {
|
|
originalValue = _q_value;
|
|
if (originalValue != expectedValue)
|
|
return false;
|
|
} while (qt_atomic_eabi_cmpxchg_int(expectedValue, newValue, &_q_value) != 0);
|
|
return true;
|
|
#else
|
|
bool returnValue = false;
|
|
int count = 0;
|
|
while (q_atomic_swp(&q_atomic_lock, ~0) != 0)
|
|
qt_atomic_yield(&count);
|
|
if (_q_value == expectedValue) {
|
|
_q_value = newValue;
|
|
returnValue = true;
|
|
}
|
|
q_atomic_swp(&q_atomic_lock, 0);
|
|
return returnValue;
|
|
#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);
|
|
}
|
|
|
|
// Fetch and store for integers
|
|
|
|
#ifndef Q_CC_RVCT
|
|
|
|
inline int QBasicAtomicInt::fetchAndStoreOrdered(int newValue)
|
|
{
|
|
int originalValue;
|
|
asm volatile("swp %0,%2,[%3]"
|
|
: "=&r"(originalValue), "=m" (_q_value)
|
|
: "r"(newValue), "r"(&_q_value)
|
|
: "cc", "memory");
|
|
return originalValue;
|
|
}
|
|
|
|
#endif
|
|
|
|
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)
|
|
{
|
|
#ifndef QT_NO_ARM_EABI
|
|
register int originalValue;
|
|
register int newValue;
|
|
do {
|
|
originalValue = _q_value;
|
|
newValue = originalValue + valueToAdd;
|
|
} while (qt_atomic_eabi_cmpxchg_int(originalValue, newValue, &_q_value) != 0);
|
|
return originalValue;
|
|
#else
|
|
int count = 0;
|
|
while (q_atomic_swp(&q_atomic_lock, ~0) != 0)
|
|
qt_atomic_yield(&count);
|
|
int originalValue = _q_value;
|
|
_q_value += valueToAdd;
|
|
q_atomic_swp(&q_atomic_lock, 0);
|
|
return originalValue;
|
|
#endif
|
|
}
|
|
|
|
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 <typename T>
|
|
Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetOrdered(T *expectedValue, T *newValue)
|
|
{
|
|
#ifndef QT_NO_ARM_EABI
|
|
register T *originalValue;
|
|
do {
|
|
originalValue = _q_value;
|
|
if (originalValue != expectedValue)
|
|
return false;
|
|
} while (qt_atomic_eabi_cmpxchg_ptr(expectedValue, newValue, &_q_value) != 0);
|
|
return true;
|
|
#else
|
|
bool returnValue = false;
|
|
int count = 0;
|
|
while (q_atomic_swp(&q_atomic_lock, ~0) != 0)
|
|
qt_atomic_yield(&count);
|
|
if (_q_value == expectedValue) {
|
|
_q_value = newValue;
|
|
returnValue = true;
|
|
}
|
|
q_atomic_swp(&q_atomic_lock, 0);
|
|
return returnValue;
|
|
#endif
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
// Fetch and store for pointers
|
|
|
|
#ifdef Q_CC_RVCT
|
|
|
|
template <typename T>
|
|
__asm T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue)
|
|
{
|
|
add r2, pc, #0
|
|
bx r2
|
|
arm
|
|
swp r2,r1,[r0]
|
|
mov r0, r2
|
|
bx lr
|
|
thumb
|
|
}
|
|
|
|
#else
|
|
|
|
template <typename T>
|
|
Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue)
|
|
{
|
|
T *originalValue;
|
|
asm volatile("swp %0,%2,[%3]"
|
|
: "=&r"(originalValue), "=m" (_q_value)
|
|
: "r"(newValue), "r"(&_q_value)
|
|
: "cc", "memory");
|
|
return originalValue;
|
|
}
|
|
|
|
#endif // Q_CC_RVCT
|
|
|
|
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);
|
|
}
|
|
|
|
// Fetch and add for pointers
|
|
|
|
template <typename T>
|
|
Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddOrdered(qptrdiff valueToAdd)
|
|
{
|
|
#ifndef QT_NO_ARM_EABI
|
|
register T *originalValue;
|
|
register T *newValue;
|
|
do {
|
|
originalValue = _q_value;
|
|
newValue = originalValue + valueToAdd;
|
|
} while (qt_atomic_eabi_cmpxchg_ptr(originalValue, newValue, &_q_value) != 0);
|
|
return originalValue;
|
|
#else
|
|
int count = 0;
|
|
while (q_atomic_swp(&q_atomic_lock, ~0) != 0)
|
|
qt_atomic_yield(&count);
|
|
T *originalValue = (_q_value);
|
|
_q_value += valueToAdd;
|
|
q_atomic_swp(&q_atomic_lock, 0);
|
|
return originalValue;
|
|
#endif
|
|
}
|
|
|
|
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_ARM_H
|