1 files changed, 89 insertions, 0 deletions
diff --git a/src/foundation/macos/Qt3DSUnixAtomic.cpp b/src/foundation/macos/Qt3DSUnixAtomic.cpp
new file mode 100644
index 0000000..c1ac396
--- /dev/null
+++ b/src/foundation/macos/Qt3DSUnixAtomic.cpp
@@ -0,0 +1,89 @@
+/****************************************************************************
+**
+** Copyright (C) 2001-2004 NovodeX AG.
+** Copyright (C) 2004-2008 AGEIA Technologies, Inc.
+** Copyright (C) 2008-2013 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"
+
+#define PAUSE() asm("nop")
+
+namespace qt3ds {
+namespace foundation {
+
+    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 oldVal;
+    }
+
+} // namespace foundation
+} // namespace qt3ds