mirror of
https://github.com/eclipse-threadx/filex.git
synced 2026-09-14 03:57:29 +08:00
Frédéric Desbiens
61b0b06c3e
* Updated version number constants * Updated copyright headers and removed revision history
120 lines
5.3 KiB
C
120 lines
5.3 KiB
C
/***************************************************************************
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* Copyright (c) 2024 Microsoft Corporation
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* Copyright (c) 2026-present Eclipse ThreadX contributors
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*
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* This program and the accompanying materials are made available under the
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* terms of the MIT License which is available at
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* https://opensource.org/licenses/MIT.
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*
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* SPDX-License-Identifier: MIT
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**************************************************************************/
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/**************************************************************************/
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/**************************************************************************/
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/** */
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/** FileX Component */
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/** */
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/** Media */
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/** */
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/**************************************************************************/
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/**************************************************************************/
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#define FX_SOURCE_CODE
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/* Include necessary system files. */
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#include "fx_api.h"
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#include "fx_system.h"
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#include "fx_media.h"
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#include "fx_utility.h"
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/**************************************************************************/
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/* */
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/* FUNCTION RELEASE */
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/* */
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/* _fx_media_read PORTABLE C */
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/* 6.1 */
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/* AUTHOR */
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/* */
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/* William E. Lamie, Microsoft Corporation */
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/* */
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/* DESCRIPTION */
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/* */
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/* This function reads the specified raw logical sector from the */
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/* specified media. */
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/* */
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/* INPUT */
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/* */
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/* media_ptr Media control block pointer */
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/* logical_sector Logical sector to read */
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/* buffer_ptr Pointer to caller's buffer */
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/* */
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/* OUTPUT */
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/* */
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/* return status */
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/* */
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/* CALLS */
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/* */
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/* _fx_utility_logical_sector_read Logical sector read utility */
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/* */
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/* CALLED BY */
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/* */
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/* Application Code */
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/* */
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/**************************************************************************/
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UINT _fx_media_read(FX_MEDIA *media_ptr, ULONG logical_sector, VOID *buffer_ptr)
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{
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UINT status;
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#ifdef TX_ENABLE_EVENT_TRACE
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TX_TRACE_BUFFER_ENTRY *trace_event;
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ULONG trace_timestamp;
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#endif
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#ifndef FX_MEDIA_STATISTICS_DISABLE
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/* Increment the number of times this service has been called. */
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media_ptr -> fx_media_reads++;
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#endif
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/* Check the media to make sure it is open. */
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if (media_ptr -> fx_media_id != FX_MEDIA_ID)
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{
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/* Return the media not opened error. */
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return(FX_MEDIA_NOT_OPEN);
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}
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/* If trace is enabled, insert this event into the trace buffer. */
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FX_TRACE_IN_LINE_INSERT(FX_TRACE_MEDIA_READ, media_ptr, logical_sector, buffer_ptr, 0, FX_TRACE_MEDIA_EVENTS, &trace_event, &trace_timestamp)
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/* Protect against other threads accessing the media. */
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FX_PROTECT
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/* Read the logical sector. */
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status = _fx_utility_logical_sector_read(media_ptr, (ULONG64) logical_sector, buffer_ptr, ((ULONG) 1), FX_DATA_SECTOR);
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#ifdef TX_ENABLE_EVENT_TRACE
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/* Check for successful status. */
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if (status == FX_SUCCESS)
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{
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/* Update the trace event with the bytes read. */
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FX_TRACE_EVENT_UPDATE(trace_event, trace_timestamp, FX_TRACE_MEDIA_READ, 0, 0, 0, media_ptr -> fx_media_bytes_per_sector)
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}
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#endif
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/* Release media protection. */
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FX_UNPROTECT
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/* Return status to the caller. */
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return(status);
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}
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