1 files changed, 61 insertions, 0 deletions
diff --git a/src/VBox/Devices/Graphics/HGSMI/SHGSMIHost.cpp b/src/VBox/Devices/Graphics/HGSMI/SHGSMIHost.cpp
new file mode 100644
index 00000000..f07382fa
--- /dev/null
+++ b/src/VBox/Devices/Graphics/HGSMI/SHGSMIHost.cpp
@@ -0,0 +1,61 @@
+/* $Id: SHGSMIHost.cpp $ */
+/** @file
+ * Missing description.
+ */
+
+/*
+ * Copyright (C) 2010-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include "SHGSMIHost.h"
+#include <VBoxVideo.h>
+
+/*
+ * VBOXSHGSMI made on top HGSMI and allows receiving notifications
+ * about G->H command completion
+ */
+
+static int vboxSHGSMICommandCompleteAsynch (PHGSMIINSTANCE pIns, VBOXSHGSMIHEADER RT_UNTRUSTED_VOLATILE_GUEST *pHdr)
+{
+    bool fDoIrq = !!(pHdr->fFlags & VBOXSHGSMI_FLAG_GH_ASYNCH_IRQ)
+                || !!(pHdr->fFlags & VBOXSHGSMI_FLAG_GH_ASYNCH_IRQ_FORCE);
+    return HGSMICompleteGuestCommand(pIns, pHdr, fDoIrq);
+}
+
+void VBoxSHGSMICommandMarkAsynchCompletion(void RT_UNTRUSTED_VOLATILE_GUEST *pvData)
+{
+    VBOXSHGSMIHEADER RT_UNTRUSTED_VOLATILE_GUEST *pHdr = VBoxSHGSMIBufferHeader(pvData);
+    Assert(!(pHdr->fFlags & VBOXSHGSMI_FLAG_HG_ASYNCH));
+    pHdr->fFlags |= VBOXSHGSMI_FLAG_HG_ASYNCH;
+}
+
+int VBoxSHGSMICommandComplete(PHGSMIINSTANCE pIns, void RT_UNTRUSTED_VOLATILE_GUEST *pvData)
+{
+    VBOXSHGSMIHEADER RT_UNTRUSTED_VOLATILE_GUEST *pHdr = VBoxSHGSMIBufferHeader(pvData);
+    uint32_t fFlags = pHdr->fFlags;
+    ASMCompilerBarrier();
+    if (   !(fFlags & VBOXSHGSMI_FLAG_HG_ASYNCH)        /* <- check if synchronous completion */
+        && !(fFlags & VBOXSHGSMI_FLAG_GH_ASYNCH_FORCE)) /* <- check if can complete synchronously */
+        return VINF_SUCCESS;
+
+    pHdr->fFlags = fFlags | VBOXSHGSMI_FLAG_HG_ASYNCH;
+    return vboxSHGSMICommandCompleteAsynch(pIns, pHdr);
+}