diff -r 000000000000 -r 6474c204b198 gfx/angle/src/compiler/ossource_win.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/angle/src/compiler/ossource_win.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,57 @@
+//
+// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "compiler/osinclude.h"
+//
+// This file contains contains the window's specific functions
+//
+
+#if !defined(ANGLE_OS_WIN)
+#error Trying to build a windows specific file in a non windows build.
+#endif
+
+
+//
+// Thread Local Storage Operations
+//
+OS_TLSIndex OS_AllocTLSIndex()
+{
+	DWORD dwIndex = TlsAlloc();
+	if (dwIndex == TLS_OUT_OF_INDEXES) {
+		assert(0 && "OS_AllocTLSIndex(): Unable to allocate Thread Local Storage");
+		return OS_INVALID_TLS_INDEX;
+	}
+
+	return dwIndex;
+}
+
+
+bool OS_SetTLSValue(OS_TLSIndex nIndex, void *lpvValue)
+{
+	if (nIndex == OS_INVALID_TLS_INDEX) {
+		assert(0 && "OS_SetTLSValue(): Invalid TLS Index");
+		return false;
+	}
+
+	if (TlsSetValue(nIndex, lpvValue))
+		return true;
+	else
+		return false;
+}
+
+
+bool OS_FreeTLSIndex(OS_TLSIndex nIndex)
+{
+	if (nIndex == OS_INVALID_TLS_INDEX) {
+		assert(0 && "OS_SetTLSValue(): Invalid TLS Index");
+		return false;
+	}
+
+	if (TlsFree(nIndex))
+		return true;
+	else
+		return false;
+}