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-rw-r--r--src/corelib/arch/qatomic_armv5.h378
1 files changed, 68 insertions, 310 deletions
diff --git a/src/corelib/arch/qatomic_armv5.h b/src/corelib/arch/qatomic_armv5.h
index 2567204452..ce89934eaf 100644
--- a/src/corelib/arch/qatomic_armv5.h
+++ b/src/corelib/arch/qatomic_armv5.h
@@ -1,7 +1,7 @@
/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
-** All rights reserved.
+** Copyright (C) 2011 Thiago Macieira <thiago@kde.org>
** Contact: http://www.qt-project.org/
**
** This file is part of the QtCore module of the Qt Toolkit.
@@ -42,303 +42,112 @@
#ifndef QATOMIC_ARMV5_H
#define QATOMIC_ARMV5_H
+#include <QtCore/qgenericatomic.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; }
+#if 0
+#pragma qt_sync_stop_processing
+#endif
+#define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_NOT_NATIVE
#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)(const void *oldval, const void *newval, volatile void *ptr);
-#define qt_atomic_eabi_cmpxchg_int (*reinterpret_cast<qt_atomic_eabi_cmpxchg_int_t *>(0xffff0fc0))
-#define qt_atomic_eabi_cmpxchg_ptr (*reinterpret_cast<qt_atomic_eabi_cmpxchg_ptr_t *>(0xffff0fc0))
+#ifdef QT_NO_ARM_EABI
+# error "Sorry, ARM without EABI is no longer supported"
+#endif
+#ifndef Q_OS_LINUX
+# error "Qt is misconfigured: this ARMv5 implementation is only possible on Linux"
+#endif
-#else
+template<> struct QAtomicIntegerTraits<int> { enum { IsInteger = 1 }; };
+template<> struct QAtomicIntegerTraits<unsigned int> { enum { IsInteger = 1 }; };
-extern Q_CORE_EXPORT char q_atomic_lock;
-Q_CORE_EXPORT void qt_atomic_yield(int *);
+template <int size> struct QBasicAtomicOps: QGenericAtomicOps<QBasicAtomicOps<size> >
+{
+ // kernel places a restartable cmpxchg implementation at a fixed address
+ template <typename T>
+ static int _q_cmpxchg(T oldval, T newval, volatile T *ptr)
+ {
+ typedef int (* kernel_cmpxchg_t)(T oldval, T newval, volatile T *ptr);
+ kernel_cmpxchg_t kernel_cmpxchg = *reinterpret_cast<kernel_cmpxchg_t>(0xffff0fc0);
+ return kernel_cmpxchg(oldval, newval, ptr);
+ }
+ static void _q_dmb()
+ {
+ typedef void (* kernel_dmb_t)();
+ kernel_dmb_t kernel_dmb = *reinterpret_cast<kernel_dmb_t>(0xffff0fa0);
+ kernel_dmb();
+ }
-#ifdef Q_CC_RVCT
+ static void orderedMemoryFence() { _q_dmb(); }
-Q_CORE_EXPORT __asm char q_atomic_swp(volatile char *ptr, char newval);
+ template <typename T> static bool ref(T &_q_value);
+ template <typename T> static bool deref(T &_q_value);
-#else
+ static bool isTestAndSetNative() { return false; }
+ static bool isTestAndSetWaitFree() { return false; }
+ template <typename T> static bool testAndSetRelaxed(T &_q_value, T expectedValue, T newValue);
+ template <typename T> static T fetchAndStoreRelaxed(T &_q_value, T newValue);
+ template <typename T> static
+ T fetchAndAddRelaxed(T &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd);
+};
-inline char q_atomic_swp(volatile char *ptr, char newval)
+template <typename T> struct QAtomicOps : QBasicAtomicOps<sizeof(T)>
{
- register char ret;
- asm volatile("swpb %0,%2,[%3]"
- : "=&r"(ret), "=m" (*ptr)
- : "r"(newval), "r"(ptr)
- : "cc", "memory");
- return ret;
-}
+ typedef T Type;
+};
-#endif // Q_CC_RVCT
-
-#endif // QT_NO_ARM_EABI
-
-// Reference counting
-
-inline bool QBasicAtomicInt::ref()
+template<> template<typename T> inline
+bool QBasicAtomicOps<4>::ref(T &_q_value)
{
-#ifndef QT_NO_ARM_EABI
- register int originalValue;
- register int newValue;
+ register T originalValue;
+ register T newValue;
do {
originalValue = _q_value;
newValue = originalValue + 1;
- } while (qt_atomic_eabi_cmpxchg_int(originalValue, newValue, &_q_value) != 0);
+ } while (_q_cmpxchg(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()
+template<> template <typename T> inline
+bool QBasicAtomicOps<4>::deref(T &_q_value)
{
-#ifndef QT_NO_ARM_EABI
- register int originalValue;
- register int newValue;
+ register T originalValue;
+ register T newValue;
do {
originalValue = _q_value;
newValue = originalValue - 1;
- } while (qt_atomic_eabi_cmpxchg_int(originalValue, newValue, &_q_value) != 0);
+ } while (_q_cmpxchg(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)
+template<> template <typename T> inline
+bool QBasicAtomicOps<4>::testAndSetRelaxed(T &_q_value, T expectedValue, T newValue)
{
-#ifndef QT_NO_ARM_EABI
- register int originalValue;
+ register T originalValue;
do {
originalValue = _q_value;
if (originalValue != expectedValue)
return false;
- } while (qt_atomic_eabi_cmpxchg_int(expectedValue, newValue, &_q_value) != 0);
+ } while (_q_cmpxchg(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)
+template<> template <typename T> inline
+__asm T QBasicAtomicOps<4>::fetchAndStoreRelaxed(T &_q_value, T newValue)
{
add r2, pc, #0
bx r2
@@ -348,80 +157,29 @@ __asm T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue)
bx lr
thumb
}
-
#else
-
-template <typename T>
-Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue)
+template<> template <typename T> inline
+T QBasicAtomicOps<4>::fetchAndStoreRelaxed(T &_q_value, T newValue)
{
- T *originalValue;
+ 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)
+template<> template <typename T> inline
+T QBasicAtomicOps<4>::fetchAndAddRelaxed(T &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd)
{
-#ifndef QT_NO_ARM_EABI
- register T *originalValue;
- register T *newValue;
+ register T originalValue;
+ register T newValue;
do {
originalValue = _q_value;
newValue = originalValue + valueToAdd;
- } while (qt_atomic_eabi_cmpxchg_ptr(originalValue, newValue, &_q_value) != 0);
+ } while (_q_cmpxchg(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
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