1 files changed, 83 insertions, 0 deletions
diff --git a/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibBalloon.cpp b/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibBalloon.cpp
new file mode 100644
index 00000000..2a37dea9
--- /dev/null
+++ b/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibBalloon.cpp
@@ -0,0 +1,83 @@
+/* $Id: VBoxGuestR3LibBalloon.cpp $ */
+/** @file
+ * VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, Ballooning.
+ */
+
+/*
+ * Copyright (C) 2007-2022 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>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "VBoxGuestR3LibInternal.h"
+#include <iprt/string.h>
+
+
+/**
+ * Refresh the memory balloon after a change.
+ *
+ * @returns IPRT status code.
+ * @param   pcChunks        The size of the balloon in chunks of 1MB (out).
+ * @param   pfHandleInR3    Allocating of memory in R3 required (out).
+ */
+VBGLR3DECL(int) VbglR3MemBalloonRefresh(uint32_t *pcChunks, bool *pfHandleInR3)
+{
+    VBGLIOCCHECKBALLOON Info;
+    VBGLREQHDR_INIT(&Info.Hdr, CHECK_BALLOON);
+    int rc = vbglR3DoIOCtl(VBGL_IOCTL_CHECK_BALLOON, &Info.Hdr, sizeof(Info));
+    if (RT_SUCCESS(rc))
+    {
+        *pcChunks = Info.u.Out.cBalloonChunks;
+        *pfHandleInR3 = Info.u.Out.fHandleInR3 != false;
+    }
+    return rc;
+}
+
+
+/**
+ * Change the memory by granting/reclaiming memory to/from R0.
+ *
+ * @returns IPRT status code.
+ * @param   pv          Memory chunk (1MB).
+ * @param   fInflate    true = inflate balloon (grant memory).
+ *                      false = deflate balloon (reclaim memory).
+ */
+VBGLR3DECL(int) VbglR3MemBalloonChange(void *pv, bool fInflate)
+{
+    VBGLIOCCHANGEBALLOON Info;
+    VBGLREQHDR_INIT(&Info.Hdr, CHANGE_BALLOON);
+    Info.u.In.pvChunk  = pv;
+    Info.u.In.fInflate = fInflate;
+    RT_ZERO(Info.u.In.abPadding);
+    return vbglR3DoIOCtl(VBGL_IOCTL_CHANGE_BALLOON, &Info.Hdr, sizeof(Info));
+}
+