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/* $Id: UsbTestServiceGadgetHost.cpp $ */
/** @file
* UsbTestServ - Remote USB test configuration and execution server, USB gadget host API.
*/
/*
* Copyright (C) 2016-2019 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/asm.h>
#include <iprt/ctype.h>
#include <iprt/errcore.h>
#include <iprt/mem.h>
#include <iprt/string.h>
#include "UsbTestServiceGadget.h"
#include "UsbTestServiceGadgetHostInternal.h"
/*********************************************************************************************************************************
* Constants And Macros, Structures and Typedefs *
*********************************************************************************************************************************/
/**
* Internal UTS gadget host instance data.
*/
typedef struct UTSGADGETHOSTINT
{
/** Reference counter. */
volatile uint32_t cRefs;
/** Pointer to the gadget host callback table. */
PCUTSGADGETHOSTIF pHstIf;
/** Interface specific instance data - variable in size. */
uint8_t abIfInst[1];
} UTSGADGETHOSTINT;
/** Pointer to the internal gadget host instance data. */
typedef UTSGADGETHOSTINT *PUTSGADGETHOSTINT;
/*********************************************************************************************************************************
* Global variables *
*********************************************************************************************************************************/
/** Known gadget host interfaces. */
static const PCUTSGADGETHOSTIF g_apUtsGadgetHostIf[] =
{
&g_UtsGadgetHostIfUsbIp,
};
/*********************************************************************************************************************************
* Internal Functions *
*********************************************************************************************************************************/
/**
* Destroys a gadget host instance.
*
* @returns nothing.
* @param pThis The gadget host instance.
*/
static void utsGadgetHostDestroy(PUTSGADGETHOSTINT pThis)
{
/** @todo Remove all gadgets. */
pThis->pHstIf->pfnTerm((PUTSGADGETHOSTTYPEINT)&pThis->abIfInst[0]);
RTMemFree(pThis);
}
DECLHIDDEN(int) utsGadgetHostCreate(UTSGADGETHOSTTYPE enmType, PCUTSGADGETCFGITEM paCfg,
PUTSGADGETHOST phGadgetHost)
{
int rc = VINF_SUCCESS;
PCUTSGADGETHOSTIF pIf = NULL;
/* Get the interface. */
for (unsigned i = 0; i < RT_ELEMENTS(g_apUtsGadgetHostIf); i++)
{
if (g_apUtsGadgetHostIf[i]->enmType == enmType)
{
pIf = g_apUtsGadgetHostIf[i];
break;
}
}
if (RT_LIKELY(pIf))
{
PUTSGADGETHOSTINT pThis = (PUTSGADGETHOSTINT)RTMemAllocZ(RT_UOFFSETOF_DYN(UTSGADGETHOSTINT, abIfInst[pIf->cbIf]));
if (RT_LIKELY(pThis))
{
pThis->cRefs = 1;
pThis->pHstIf = pIf;
rc = pIf->pfnInit((PUTSGADGETHOSTTYPEINT)&pThis->abIfInst[0], paCfg);
if (RT_SUCCESS(rc))
*phGadgetHost = pThis;
else
RTMemFree(pThis);
}
else
rc = VERR_NO_MEMORY;
}
else
rc = VERR_INVALID_PARAMETER;
return rc;
}
DECLHIDDEN(uint32_t) utsGadgetHostRetain(UTSGADGETHOST hGadgetHost)
{
PUTSGADGETHOSTINT pThis = hGadgetHost;
AssertPtrReturn(pThis, 0);
return ASMAtomicIncU32(&pThis->cRefs);
}
DECLHIDDEN(uint32_t) utsGadgetHostRelease(UTSGADGETHOST hGadgetHost)
{
PUTSGADGETHOSTINT pThis = hGadgetHost;
AssertPtrReturn(pThis, 0);
uint32_t cRefs = ASMAtomicDecU32(&pThis->cRefs);
if (!cRefs)
utsGadgetHostDestroy(pThis);
return cRefs;
}
DECLHIDDEN(int) utsGadgetHostGadgetConnect(UTSGADGETHOST hGadgetHost, UTSGADGET hGadget)
{
PUTSGADGETHOSTINT pThis = hGadgetHost;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
return pThis->pHstIf->pfnGadgetConnect((PUTSGADGETHOSTTYPEINT)&pThis->abIfInst[0], hGadget);
}
DECLHIDDEN(int) utsGadgetHostGadgetDisconnect(UTSGADGETHOST hGadgetHost, UTSGADGET hGadget)
{
PUTSGADGETHOSTINT pThis = hGadgetHost;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
return pThis->pHstIf->pfnGadgetDisconnect((PUTSGADGETHOSTTYPEINT)&pThis->abIfInst[0], hGadget);
}
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