1 files changed, 73 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..2c192f0d
--- /dev/null
+++ b/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibBalloon.cpp
@@ -0,0 +1,73 @@
+/* $Id: VBoxGuestR3LibBalloon.cpp $ */
+/** @file
+ * VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, Ballooning.
+ */
+
+/*
+ * Copyright (C) 2007-2019 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.
+ */
+
+
+/*********************************************************************************************************************************
+*   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));
+}
+