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/* $Id: VBoxGuestR3LibGR.cpp $ */
/** @file
* VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, GR.
*/
/*
* 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 <iprt/mem.h>
#include <iprt/assert.h>
#include <iprt/string.h>
#include <iprt/errcore.h>
#include "VBoxGuestR3LibInternal.h"
int vbglR3GRAlloc(VMMDevRequestHeader **ppReq, size_t cb, VMMDevRequestType enmReqType)
{
VMMDevRequestHeader *pReq;
AssertPtrReturn(ppReq, VERR_INVALID_PARAMETER);
AssertMsgReturn(cb >= sizeof(VMMDevRequestHeader) && cb < _1G, ("%#zx vs %#zx\n", cb, sizeof(VMMDevRequestHeader)),
VERR_INVALID_PARAMETER);
pReq = (VMMDevRequestHeader *)RTMemTmpAlloc(cb);
if (RT_LIKELY(pReq))
{
pReq->size = (uint32_t)cb;
pReq->version = VMMDEV_REQUEST_HEADER_VERSION;
pReq->requestType = enmReqType;
pReq->rc = VERR_GENERAL_FAILURE;
pReq->reserved1 = 0;
pReq->fRequestor = 0;
*ppReq = pReq;
return VINF_SUCCESS;
}
return VERR_NO_MEMORY;
}
int vbglR3GRPerform(VMMDevRequestHeader *pReq)
{
PVBGLREQHDR pReqHdr = (PVBGLREQHDR)pReq;
uint32_t const cbReq = pReqHdr->cbIn;
Assert(pReqHdr->cbOut == 0 || pReqHdr->cbOut == cbReq);
pReqHdr->cbOut = cbReq;
if (pReq->size < _1K)
return vbglR3DoIOCtl(VBGL_IOCTL_VMMDEV_REQUEST(cbReq), pReqHdr, cbReq);
return vbglR3DoIOCtl(VBGL_IOCTL_VMMDEV_REQUEST_BIG, pReqHdr, cbReq);
}
void vbglR3GRFree(VMMDevRequestHeader *pReq)
{
RTMemTmpFree(pReq);
}
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