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diff --git a/ovr_sdk_win_23.0.0/LibOVRKernel/Src/Kernel/OVR_Atomic.cpp b/ovr_sdk_win_23.0.0/LibOVRKernel/Src/Kernel/OVR_Atomic.cpp
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+/************************************************************************************
+
+Filename    :   OVR_Atomic.cpp
+Content     :   Contains atomic operations and inline fastest locking
+                functionality. Will contain #ifdefs for OS efficiency.
+                Have non-thread-safe implementation if not available.
+Created     :   September 19, 2012
+Notes       :
+
+Copyright   :   Copyright (c) Facebook Technologies, LLC and its affiliates. All rights reserved.
+
+Licensed under the Oculus Master SDK License Version 1.0 (the "License");
+you may not use the Oculus VR Rift SDK except in compliance with the License,
+which is provided at the time of installation or download, or which
+otherwise accompanies this software in either electronic or hard copy form.
+
+You may obtain a copy of the License at
+
+https://developer.oculus.com/licenses/oculusmastersdk-1.0
+
+Unless required by applicable law or agreed to in writing, the Oculus VR SDK
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+************************************************************************************/
+
+#include "OVR_Atomic.h"
+#include "OVR_Allocator.h"
+
+#ifdef OVR_ENABLE_THREADS
+
+// Include Windows 8-Metro compatible Synchronization API
+#if defined(OVR_OS_MS) && defined(NTDDI_WIN8) && (NTDDI_VERSION >= NTDDI_WIN8)
+#include <synchapi.h>
+#endif
+
+namespace OVR {
+
+// ***** Windows Lock implementation
+
+#if defined(OVR_OS_MS)
+
+// ***** Standard Win32 Lock implementation
+
+// Constructors
+Lock::Lock(unsigned spinCount) {
+#if defined(NTDDI_WIN8) && (NTDDI_VERSION >= NTDDI_WIN8)
+  // On Windows 8 we use InitializeCriticalSectionEx due to Metro-Compatibility
+  InitializeCriticalSectionEx(
+      &cs, (DWORD)spinCount, OVR_DEBUG_SELECT(NULL, CRITICAL_SECTION_NO_DEBUG_INFO));
+#else
+  ::InitializeCriticalSectionAndSpinCount(
+      &cs, (DWORD)spinCount); // This is available with WindowsXP+.
+#endif
+}
+
+Lock::~Lock() {
+  DeleteCriticalSection(&cs);
+}
+
+#endif
+
+} // namespace OVR
+
+#endif // OVR_ENABLE_THREADS