mirror of
https://github.com/eclipse-threadx/filex.git
synced 2026-09-13 19:45:58 +08:00
Frédéric Desbiens
61b0b06c3e
* Updated version number constants * Updated copyright headers and removed revision history
127 lines
5.6 KiB
C
127 lines
5.6 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_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_cache_invalidate 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 examines the logical cache, flushing written sectors */
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/* out to the media and invalidating all sectors in the logical cache. */
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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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/* */
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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_FAT_flush Flush cached FAT entries */
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/* _fx_utility_FAT_map_flush Flush primary FAT changes to */
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/* secondary FAT(s) */
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/* _fx_utility_logical_sector_flush Flush logical sector cache */
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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_cache_invalidate(FX_MEDIA *media_ptr)
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{
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UINT status;
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UINT i;
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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_flushes++;
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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_CACHE_INVALIDATE, media_ptr, 0, 0, 0, FX_TRACE_MEDIA_EVENTS, 0, 0)
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/* Protect against other threads accessing the media. */
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FX_PROTECT
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/* Flush the cached individual FAT entries */
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_fx_utility_FAT_flush(media_ptr);
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/* Flush changed sector(s) in the primary FAT to secondary FATs. */
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_fx_utility_FAT_map_flush(media_ptr);
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/* Clear the FAT cache entry array. */
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for (i = 0; i < FX_MAX_FAT_CACHE; i++)
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{
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/* Clear entry in the FAT cache. */
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media_ptr -> fx_media_fat_cache[i].fx_fat_cache_entry_cluster = 0;
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media_ptr -> fx_media_fat_cache[i].fx_fat_cache_entry_value = 0;
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}
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/* Clear the secondary FAT update map. */
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for (i = 0; i < FX_FAT_MAP_SIZE; i++)
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{
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/* Clear bit map entry for secondary FAT update. */
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media_ptr -> fx_media_fat_secondary_update_map[i] = 0;
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}
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/* Call the logical sector flush to invalidate the logical sector cache. */
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status = _fx_utility_logical_sector_flush(media_ptr, ((ULONG64) 1), (ULONG64) (media_ptr -> fx_media_total_sectors), FX_TRUE);
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/* Release media protection. */
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FX_UNPROTECT
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/* If we get here, return successful status to the caller. */
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return(status);
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}
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