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/** $Id: VDIoBackend.h $ */
/** @file
*
* VBox HDD container test utility, async I/O backend
*/
/*
* Copyright (C) 2013-2020 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_VDIoBackend_h
#define VBOX_INCLUDED_SRC_testcase_VDIoBackend_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/sg.h>
#include "VDDefs.h"
/** I/O backend handle. */
typedef struct VDIOBACKEND *PVDIOBACKEND;
/** Pointer to a I/O backend handle. */
typedef PVDIOBACKEND *PPVDIOBACKEND;
/** Storage handle. */
typedef struct VDIOSTORAGE *PVDIOSTORAGE;
/** Pointer to a storage handle. */
typedef PVDIOSTORAGE *PPVDIOSTORAGE;
/**
* 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 VDIoBackendCreate(PPVDIOBACKEND ppIoBackend);
/**
* Destroys a memory I/O backend.
*
* @returns nothing.
*
* @param pIoBackend The backend to destroy.
*/
void VDIoBackendDestroy(PVDIOBACKEND pIoBackend);
int VDIoBackendStorageCreate(PVDIOBACKEND pIoBackend, const char *pszBackend,
const char *pszName, PFNVDIOCOMPLETE pfnComplete,
PPVDIOSTORAGE ppIoStorage);
void VDIoBackendStorageDestroy(PVDIOSTORAGE pIoStorage);
int VDIoBackendStorageSetSize(PVDIOSTORAGE pIoStorage, uint64_t cbSize);
int VDIoBackendStorageGetSize(PVDIOSTORAGE pIoStorage, uint64_t *pcbSize);
DECLHIDDEN(int) VDIoBackendDumpToFile(PVDIOSTORAGE pIoStorage, const char *pszPath);
/**
* Enqueues a new I/O request.
*
* @returns IPRT status code.
*
* @param pIoStorage Storage handle.
* @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 pvUser Opaque user data.
* @param fSync Flag whether to wait for the operation to complete.
*/
int VDIoBackendTransfer(PVDIOSTORAGE pIoStorage, VDIOTXDIR enmTxDir, uint64_t off,
size_t cbTransfer, PRTSGBUF pSgBuf, void *pvUser, bool fSync);
#endif /* !VBOX_INCLUDED_SRC_testcase_VDIoBackend_h */
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