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/** $Id: VDIoBackendMem.h $ */
/** @file
*
* VBox HDD container test utility, async I/O memory backend
*/
/*
* Copyright (C) 2011-2020 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.
*/
#ifndef VBOX_INCLUDED_SRC_testcase_VDIoBackendMem_h
#define VBOX_INCLUDED_SRC_testcase_VDIoBackendMem_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/sg.h>
#include "VDDefs.h"
/** Memory backend handle. */
typedef struct VDIOBACKENDMEM *PVDIOBACKENDMEM;
/** Pointer to a memory backend handle. */
typedef PVDIOBACKENDMEM *PPVDIOBACKENDMEM;
/**
* Completion handler.
*
* @returns nothing.
* @param pvUser Opaque user data.
* @param rcReq Completion code for the request.
*/
typedef DECLCALLBACK(int) FNVDIOCOMPLETE(void *pvUser, int rcReq);
/** Pointer to a completion handler. */
typedef FNVDIOCOMPLETE *PFNVDIOCOMPLETE;
/**
* Creates a new memory I/O backend.
*
* @returns IPRT status code.
*
* @param ppIoBackend Where to store the handle on success.
*/
int VDIoBackendMemCreate(PPVDIOBACKENDMEM ppIoBackend);
/**
* Destroys a memory I/O backend.
*
* @returns IPRT status code.
*
* @param pIoBackend The backend to destroy.
*/
int VDIoBackendMemDestroy(PVDIOBACKENDMEM pIoBackend);
/**
* Enqueues a new I/O request.
*
* @returns IPRT status code.
*
* @param pIoBackend The backend which should handle the
* transfer.
* @param pMemDisk The memory disk the request is for.
* @param enmTxDir The transfer direction.
* @param off Start offset of the transfer.
* @param cbTransfer Size of the transfer.
* @param pSgBuf S/G buffer to use.
* @param pfnComplete Completion handler to call.
* @param pvUser Opaque user data.
*/
int VDIoBackendMemTransfer(PVDIOBACKENDMEM pIoBackend, PVDMEMDISK pMemDisk,
VDIOTXDIR enmTxDir, uint64_t off, size_t cbTransfer,
PRTSGBUF pSgBuf, PFNVDIOCOMPLETE pfnComplete, void *pvUser);
#endif /* !VBOX_INCLUDED_SRC_testcase_VDIoBackendMem_h */
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