1 files changed, 93 insertions, 0 deletions
diff --git a/src/Runtime/Source/foundation/windows/Qt3DSWindowsAtomic.cpp b/src/Runtime/Source/foundation/windows/Qt3DSWindowsAtomic.cpp
new file mode 100644
index 00000000..4f95d3dd
--- /dev/null
+++ b/src/Runtime/Source/foundation/windows/Qt3DSWindowsAtomic.cpp
@@ -0,0 +1,93 @@
+/****************************************************************************
+**
+** 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/windows/Qt3DSWindowsInclude.h"
+#include "foundation/Qt3DSAtomic.h"
+
+namespace qt3ds {
+namespace foundation {
+
+    QT3DSI32 atomicExchange(volatile QT3DSI32 *val, QT3DSI32 val2)
+    {
+        return (QT3DSI32)InterlockedExchange((volatile LONG *)val, (LONG)val2);
+    }
+
+    QT3DSI32 atomicCompareExchange(volatile QT3DSI32 *dest, QT3DSI32 exch, QT3DSI32 comp)
+    {
+        return (QT3DSI32)InterlockedCompareExchange((volatile LONG *)dest, exch, comp);
+    }
+
+    void *atomicCompareExchangePointer(volatile void **dest, void *exch, void *comp)
+    {
+        return InterlockedCompareExchangePointer((volatile PVOID *)dest, exch, comp);
+    }
+
+    QT3DSI32 atomicIncrement(volatile QT3DSI32 *val)
+    {
+        return (QT3DSI32)InterlockedIncrement((volatile LONG *)val);
+    }
+
+    QT3DSI32 atomicDecrement(volatile QT3DSI32 *val)
+    {
+        return (QT3DSI32)InterlockedDecrement((volatile LONG *)val);
+    }
+
+    QT3DSI32 atomicAdd(volatile QT3DSI32 *val, QT3DSI32 delta)
+    {
+        LONG newValue, oldValue;
+        do {
+            oldValue = *val;
+            newValue = oldValue + delta;
+        } while (InterlockedCompareExchange((volatile LONG *)val, newValue, oldValue) != oldValue);
+
+        return newValue;
+    }
+
+    QT3DSI32 atomicMax(volatile QT3DSI32 *val, QT3DSI32 val2)
+    {
+        // Could do this more efficiently in asm...
+
+        LONG newValue, oldValue;
+
+        do {
+            oldValue = *val;
+
+            if (val2 > oldValue)
+                newValue = val2;
+            else
+                newValue = oldValue;
+
+        } while (InterlockedCompareExchange((volatile LONG *)val, newValue, oldValue) != oldValue);
+
+        return newValue;
+    }
+
+} // namespace foundation
+} // namespace qt3ds