summaryrefslogtreecommitdiffstats
path: root/src/corelib/arch/qatomic_armv5.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/corelib/arch/qatomic_armv5.h')
-rw-r--r--src/corelib/arch/qatomic_armv5.h204
1 files changed, 0 insertions, 204 deletions
diff --git a/src/corelib/arch/qatomic_armv5.h b/src/corelib/arch/qatomic_armv5.h
deleted file mode 100644
index 8a1b78aec7..0000000000
--- a/src/corelib/arch/qatomic_armv5.h
+++ /dev/null
@@ -1,204 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2015 The Qt Company Ltd.
-** Copyright (C) 2011 Thiago Macieira <thiago@kde.org>
-** Contact: http://www.qt.io/licensing/
-**
-** This file is part of the QtCore module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL21$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see http://www.qt.io/terms-conditions. For further
-** information use the contact form at http://www.qt.io/contact-us.
-**
-** 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 or version 3 as published by the Free
-** Software Foundation and appearing in the file LICENSE.LGPLv21 and
-** LICENSE.LGPLv3 included in the packaging of this file. Please review the
-** following information to ensure the GNU Lesser General Public License
-** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
-** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** As a special exception, The Qt Company gives you certain additional
-** rights. These rights are described in The Qt Company LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef QATOMIC_ARMV5_H
-#define QATOMIC_ARMV5_H
-
-#include <QtCore/qgenericatomic.h>
-
-QT_BEGIN_NAMESPACE
-
-#if 0
-// silence syncqt warnings
-QT_END_NAMESPACE
-#pragma qt_sync_skip_header_check
-#pragma qt_sync_stop_processing
-#endif
-
-#define Q_ATOMIC_INT32_IS_SUPPORTED
-#define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_NOT_NATIVE
-#define Q_ATOMIC_INT_TEST_AND_SET_IS_NOT_NATIVE
-#define Q_ATOMIC_INT_FETCH_AND_STORE_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT_FETCH_AND_STORE_IS_WAIT_FREE
-#define Q_ATOMIC_INT_FETCH_AND_ADD_IS_NOT_NATIVE
-
-#define Q_ATOMIC_POINTER_TEST_AND_SET_IS_NOT_NATIVE
-#define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_WAIT_FREE
-#define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_NOT_NATIVE
-
-#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
-
-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) Q_DECL_NOTHROW
- {
- 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() Q_DECL_NOTHROW
- {
- typedef void (* kernel_dmb_t)();
- kernel_dmb_t kernel_dmb = *reinterpret_cast<kernel_dmb_t>(0xffff0fa0);
- kernel_dmb();
- }
-
- template <typename T>
- static void orderedMemoryFence(const T &) Q_DECL_NOTHROW { _q_dmb(); }
-
- template <typename T> static bool ref(T &_q_value) Q_DECL_NOTHROW;
- template <typename T> static bool deref(T &_q_value) Q_DECL_NOTHROW;
-
- static Q_DECL_CONSTEXPR bool isTestAndSetNative() Q_DECL_NOTHROW { return false; }
- static Q_DECL_CONSTEXPR bool isTestAndSetWaitFree() Q_DECL_NOTHROW { return false; }
- template <typename T> static bool testAndSetRelaxed(T &_q_value, T expectedValue, T newValue) Q_DECL_NOTHROW;
- template <typename T> static bool testAndSetRelaxed(T &_q_value, T expectedValue, T newValue, T *currentValue) Q_DECL_NOTHROW;
- template <typename T> static T fetchAndStoreRelaxed(T &_q_value, T newValue) Q_DECL_NOTHROW;
- template <typename T> static
- T fetchAndAddRelaxed(T &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW;
-};
-
-template <typename T> struct QAtomicOps : QBasicAtomicOps<sizeof(T)>
-{
- typedef T Type;
-};
-
-template<> template<typename T> inline
-bool QBasicAtomicOps<4>::ref(T &_q_value) Q_DECL_NOTHROW
-{
- T originalValue;
- T newValue;
- do {
- originalValue = _q_value;
- newValue = originalValue + 1;
- } while (_q_cmpxchg(originalValue, newValue, &_q_value) != 0);
- return newValue != 0;
-}
-
-template<> template <typename T> inline
-bool QBasicAtomicOps<4>::deref(T &_q_value) Q_DECL_NOTHROW
-{
- T originalValue;
- T newValue;
- do {
- originalValue = _q_value;
- newValue = originalValue - 1;
- } while (_q_cmpxchg(originalValue, newValue, &_q_value) != 0);
- return newValue != 0;
-}
-
-template<> template <typename T> inline
-bool QBasicAtomicOps<4>::testAndSetRelaxed(T &_q_value, T expectedValue, T newValue) Q_DECL_NOTHROW
-{
- T originalValue;
- do {
- originalValue = _q_value;
- if (originalValue != expectedValue)
- return false;
- } while (_q_cmpxchg(expectedValue, newValue, &_q_value) != 0);
- return true;
-}
-
-template<> template <typename T> inline
-bool QBasicAtomicOps<4>::testAndSetRelaxed(T &_q_value, T expectedValue, T newValue, T *currentValue) Q_DECL_NOTHROW
-{
- T originalValue;
- do {
- originalValue = _q_value;
- if (originalValue != expectedValue) {
- if (currentValue)
- *currentValue = originalValue;
- return false;
- }
- } while (_q_cmpxchg(expectedValue, newValue, &_q_value) != 0);
- return true;
-}
-
-// Fetch and store for integers
-#ifdef Q_CC_RVCT
-template<> template <typename T> inline
-__asm T QBasicAtomicOps<4>::fetchAndStoreRelaxed(T &_q_value, T newValue) Q_DECL_NOTHROW
-{
- add r2, pc, #0
- bx r2
- arm
- swp r2,r1,[r0]
- mov r0, r2
- bx lr
- thumb
-}
-#else
-template<> template <typename T> inline
-T QBasicAtomicOps<4>::fetchAndStoreRelaxed(T &_q_value, T newValue) Q_DECL_NOTHROW
-{
-#if defined(__thumb__)
- T originalValue;
- do {
- originalValue = _q_value;
- } while (_q_cmpxchg(originalValue, newValue, &_q_value) != 0);
- return originalValue;
-#else
- T originalValue;
- asm volatile("swp %0,%2,[%3]"
- : "=&r"(originalValue), "=m" (_q_value)
- : "r"(newValue), "r"(&_q_value)
- : "cc", "memory");
- return originalValue;
-#endif
-}
-#endif // Q_CC_RVCT
-
-template<> template <typename T> inline
-T QBasicAtomicOps<4>::fetchAndAddRelaxed(T &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
-{
- T originalValue;
- T newValue;
- do {
- originalValue = _q_value;
- newValue = originalValue + valueToAdd;
- } while (_q_cmpxchg(originalValue, newValue, &_q_value) != 0);
- return originalValue;
-}
-
-QT_END_NAMESPACE
-
-#endif // QATOMIC_ARMV5_H
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-20 00:32:57 +0000