diff options
Diffstat (limited to 'src/foundation/linux/Qt3DSLinuxAtomic.cpp')
-rw-r--r-- | src/foundation/linux/Qt3DSLinuxAtomic.cpp | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/src/foundation/linux/Qt3DSLinuxAtomic.cpp b/src/foundation/linux/Qt3DSLinuxAtomic.cpp new file mode 100644 index 0000000..f0045dd --- /dev/null +++ b/src/foundation/linux/Qt3DSLinuxAtomic.cpp @@ -0,0 +1,129 @@ +/**************************************************************************** +** +** Copyright (C) 2008-2012 NVIDIA Corporation. +** Copyright (C) 2017 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of Qt 3D Studio. +** +** $QT_BEGIN_LICENSE:GPL$ +** 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 https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3 or (at your option) any later version +** approved by the KDE Free Qt Foundation. The licenses are as published by +** the Free Software Foundation and appearing in the file LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#include "foundation/Qt3DS.h" +#include "foundation/Qt3DSAtomic.h" +#ifdef __QNX__ +#include <atomic.h> +#endif +#ifdef __INTEGRITY +#include <QtCore/qmutex.h> +#endif + +#define PAUSE() asm("nop") + +namespace qt3ds { +namespace foundation { +#ifdef __QNX__ + QT3DSI32 atomicIncrement(volatile QT3DSI32 *val) + { + atomic_add((volatile unsigned *)val, 1); + return *val; + } + + QT3DSI32 atomicDecrement(volatile QT3DSI32 *val) + { + atomic_sub((volatile unsigned *)val, 1); + return *val; + } +#elif defined (__INTEGRITY) + // TestAndSet and AtomicModify take in volatile Address* leading to overflow error if used + + QT3DSI32 atomicCompareExchange(volatile QT3DSI32 *dest, QT3DSI32 exch, QT3DSI32 comp) + { + static QMutex mutex; + QMutexLocker lock(&mutex); + QT3DSI32 ret = *dest; + *dest = (*dest == comp) ? exch : ret; + return ret; + } + + QT3DSI32 atomicIncrement(volatile QT3DSI32 *val) + { + static QMutex mutex; + QMutexLocker lock(&mutex); + return ++(*val); + } + + QT3DSI32 atomicDecrement(volatile QT3DSI32 *val) + { + static QMutex mutex; + QMutexLocker lock(&mutex); + return --(*val); + } +#else + void *atomicCompareExchangePointer(volatile void **dest, void *exch, void *comp) + { + return __sync_val_compare_and_swap((void **)dest, comp, exch); + } + + QT3DSI32 atomicCompareExchange(volatile QT3DSI32 *dest, QT3DSI32 exch, QT3DSI32 comp) + { + return __sync_val_compare_and_swap(dest, comp, exch); + } + + QT3DSI32 atomicIncrement(volatile QT3DSI32 *val) { return __sync_add_and_fetch(val, 1); } + + QT3DSI32 atomicDecrement(volatile QT3DSI32 *val) { return __sync_sub_and_fetch(val, 1); } + + QT3DSI32 atomicAdd(volatile QT3DSI32 *val, QT3DSI32 delta) { return __sync_add_and_fetch(val, delta); } + + QT3DSI32 atomicMax(volatile QT3DSI32 *val, QT3DSI32 val2) + { + QT3DSI32 oldVal, newVal; + + do { + PAUSE(); + oldVal = *val; + + if (val2 > oldVal) + newVal = val2; + else + newVal = oldVal; + + } while (atomicCompareExchange(val, newVal, oldVal) != oldVal); + + return *val; + } + + QT3DSI32 atomicExchange(volatile QT3DSI32 *val, QT3DSI32 val2) + { + QT3DSI32 newVal, oldVal; + + do { + PAUSE(); + oldVal = *val; + newVal = val2; + } while (atomicCompareExchange(val, newVal, oldVal) != oldVal); + + return newVal; + } +#endif +} // namespace foundation +} // namespace qt3ds |