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diff --git a/include/VBox/Graphics/HGSMIHostCmd.h b/include/VBox/Graphics/HGSMIHostCmd.h
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+/* $Id: HGSMIHostCmd.h $ */
+/** @file
+ * VBox Host Guest Shared Memory Interface (HGSMI) - buffer management.
+ */
+
+/*
+ * Copyright (C) 2006-2020 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_HGSMIHostCmd_h
+#define VBOX_INCLUDED_Graphics_HGSMIHostCmd_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include "HGSMI.h"
+#include "HGSMIContext.h"
+#include "VBoxVideoIPRT.h"
+
+RT_C_DECLS_BEGIN
+
+/** @name Base HGSMI host command APIs.
+ * @{ */
+
+DECLHIDDEN(void) VBoxHGSMIHostCmdComplete(PHGSMIHOSTCOMMANDCONTEXT pCtx, void RT_UNTRUSTED_VOLATILE_HOST *pvMem);
+DECLHIDDEN(void) VBoxHGSMIProcessHostQueue(PHGSMIHOSTCOMMANDCONTEXT pCtx);
+
+/** @} */
+
+RT_C_DECLS_END
+
+#endif /* !VBOX_INCLUDED_Graphics_HGSMIHostCmd_h */