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#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 |