| 1 | /** $Id: VDIoBackend.h 46247 2013-05-23 19:19:42Z vboxsync $ */
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| 2 | /** @file
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| 3 | *
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| 4 | * VBox HDD container test utility, async I/O backend
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| 5 | */
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| 6 |
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| 7 | /*
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| 8 | * Copyright (C) 2013 Oracle Corporation
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| 9 | *
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| 10 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 11 | * available from http://www.virtualbox.org. This file is free software;
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| 12 | * you can redistribute it and/or modify it under the terms of the GNU
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| 13 | * General Public License (GPL) as published by the Free Software
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| 14 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 15 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 16 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 17 | */
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| 18 | #ifndef __VDIoBackend_h__
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| 19 | #define __VDIoBackend_h__
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| 20 |
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| 21 | #include <iprt/sg.h>
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| 22 |
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| 23 | #include "VDDefs.h"
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| 24 |
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| 25 | /** I/O backend handle. */
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| 26 | typedef struct VDIOBACKEND *PVDIOBACKEND;
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| 27 | /** Pointer to a I/O backend handle. */
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| 28 | typedef PVDIOBACKEND *PPVDIOBACKEND;
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| 29 |
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| 30 | /** Storage handle. */
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| 31 | typedef struct VDIOSTORAGE *PVDIOSTORAGE;
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| 32 | /** Pointer to a storage handle. */
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| 33 | typedef PVDIOSTORAGE *PPVDIOSTORAGE;
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| 34 |
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| 35 | /**
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| 36 | * Completion handler.
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| 37 | *
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| 38 | * @returns nothing.
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| 39 | * @param pvUser Opaque user data.
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| 40 | * @param rcReq Completion code for the request.
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| 41 | */
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| 42 | typedef DECLCALLBACK(int) FNVDIOCOMPLETE(void *pvUser, int rcReq);
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| 43 | /** Pointer to a completion handler. */
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| 44 | typedef FNVDIOCOMPLETE *PFNVDIOCOMPLETE;
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| 45 |
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| 46 | /**
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| 47 | * Creates a new memory I/O backend.
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| 48 | *
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| 49 | * @returns IPRT status code.
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| 50 | *
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| 51 | * @param ppIoBackend Where to store the handle on success.
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| 52 | */
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| 53 | int VDIoBackendCreate(PPVDIOBACKEND ppIoBackend);
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| 54 |
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| 55 | /**
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| 56 | * Destroys a memory I/O backend.
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| 57 | *
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| 58 | * @returns nothing.
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| 59 | *
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| 60 | * @param pIoBackend The backend to destroy.
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| 61 | */
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| 62 | void VDIoBackendDestroy(PVDIOBACKEND pIoBackend);
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| 63 |
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| 64 | int VDIoBackendStorageCreate(PVDIOBACKEND pIoBackend, const char *pszBackend,
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| 65 | const char *pszName, PFNVDIOCOMPLETE pfnComplete,
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| 66 | PPVDIOSTORAGE ppIoStorage);
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| 67 |
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| 68 | void VDIoBackendStorageDestroy(PVDIOSTORAGE pIoStorage);
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| 69 |
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| 70 | int VDIoBackendStorageSetSize(PVDIOSTORAGE pIoStorage, uint64_t cbSize);
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| 71 |
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| 72 | int VDIoBackendStorageGetSize(PVDIOSTORAGE pIoStorage, uint64_t *pcbSize);
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| 73 |
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| 74 | /**
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| 75 | * Enqueues a new I/O request.
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| 76 | *
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| 77 | * @returns IPRT status code.
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| 78 | *
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| 79 | * @param pIoStorage Storage handle.
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| 80 | * @param enmTxDir The transfer direction.
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| 81 | * @param off Start offset of the transfer.
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| 82 | * @param cbTransfer Size of the transfer.
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| 83 | * @param pSgBuf S/G buffer to use.
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| 84 | * @param pvUser Opaque user data.
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| 85 | * @param fSync Flag whether to wait for the operation to complete.
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| 86 | */
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| 87 | int VDIoBackendTransfer(PVDIOSTORAGE pIoStorage, VDIOTXDIR enmTxDir, uint64_t off,
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| 88 | size_t cbTransfer, PRTSGBUF pSgBuf, void *pvUser, bool fSync);
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| 89 |
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| 90 | #endif /* __VDIoBackendMem_h__ */
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