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/* $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));
}
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