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/* $Id: fileaio.h $ */
/** @file
* IPRT - Internal RTFileAio header.
*/
/*
* Copyright (C) 2009-2020 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.
*
* 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.
*/
#ifndef IPRT_INCLUDED_INTERNAL_fileaio_h
#define IPRT_INCLUDED_INTERNAL_fileaio_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/file.h>
#include "internal/magics.h"
/*******************************************************************************
* Structures and Typedefs *
*******************************************************************************/
/**
* Defined request states.
*/
typedef enum RTFILEAIOREQSTATE
{
/** Prepared. */
RTFILEAIOREQSTATE_PREPARED = 0,
/** Submitted. */
RTFILEAIOREQSTATE_SUBMITTED,
/** Completed. */
RTFILEAIOREQSTATE_COMPLETED,
/** Omni present 32bit hack. */
RTFILEAIOREQSTATE_32BIT_HACK = 0x7fffffff
} RTFILEAIOREQSTATE;
/*******************************************************************************
* Defined Constants And Macros *
*******************************************************************************/
/** Return true if the specified request is not valid, false otherwise. */
#define RTFILEAIOREQ_IS_NOT_VALID(pReq) \
(RT_UNLIKELY(!VALID_PTR(pReq) || (pReq->u32Magic != RTFILEAIOREQ_MAGIC)))
/** Validates a context handle and returns VERR_INVALID_HANDLE if not valid. */
#define RTFILEAIOREQ_VALID_RETURN_RC(pReq, rc) \
do { \
AssertPtrReturn((pReq), (rc)); \
AssertReturn((pReq)->u32Magic == RTFILEAIOREQ_MAGIC, (rc)); \
} while (0)
/** Validates a context handle and returns VERR_INVALID_HANDLE if not valid. */
#define RTFILEAIOREQ_VALID_RETURN(pReq) RTFILEAIOREQ_VALID_RETURN_RC((pReq), VERR_INVALID_HANDLE)
/** Validates a context handle and returns (void) if not valid. */
#define RTFILEAIOREQ_VALID_RETURN_VOID(pReq) \
do { \
AssertPtrReturnVoid(pReq); \
AssertReturnVoid((pReq)->u32Magic == RTFILEAIOREQ_MAGIC); \
} while (0)
/** Validates a context handle and returns the specified rc if not valid. */
#define RTFILEAIOCTX_VALID_RETURN_RC(pCtx, rc) \
do { \
AssertPtrReturn((pCtx), (rc)); \
AssertReturn((pCtx)->u32Magic == RTFILEAIOCTX_MAGIC, (rc)); \
} while (0)
/** Validates a context handle and returns VERR_INVALID_HANDLE if not valid. */
#define RTFILEAIOCTX_VALID_RETURN(pCtx) RTFILEAIOCTX_VALID_RETURN_RC((pCtx), VERR_INVALID_HANDLE)
/** Checks if a request is in the specified state and returns the specified rc if not. */
#define RTFILEAIOREQ_STATE_RETURN_RC(pReq, State, rc) \
do { \
if (RT_UNLIKELY(pReq->enmState != RTFILEAIOREQSTATE_##State)) \
return rc; \
} while (0)
/** Checks if a request is not in the specified state and returns the specified rc if it is. */
#define RTFILEAIOREQ_NOT_STATE_RETURN_RC(pReq, State, rc) \
do { \
if (RT_UNLIKELY(pReq->enmState == RTFILEAIOREQSTATE_##State)) \
return rc; \
} while (0)
/** Checks if a request in the given states and sserts if not. */
#define RTFIELAIOREQ_ASSERT_STATE(pReq, State) \
do { \
AssertPtr((pReq)); \
Assert((pReq)->u32Magic == RTFILEAIOREQ_MAGIC); \
Assert((pReq)->enmState == RTFILEAIOREQSTATE_##State); \
} while (0)
/** Sets the request into a specific state. */
#define RTFILEAIOREQ_SET_STATE(pReq, State) \
do { \
pReq->enmState = RTFILEAIOREQSTATE_##State; \
} while (0)
RT_C_DECLS_BEGIN
RT_C_DECLS_END
#endif /* !IPRT_INCLUDED_INTERNAL_fileaio_h */
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