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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** FileX Component */
/** */
/** Fault Tolerant */
/** */
/**************************************************************************/
/**************************************************************************/
#define FX_SOURCE_CODE
#include "fx_api.h"
#include "fx_fault_tolerant.h"
#ifdef FX_ENABLE_FAULT_TOLERANT
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _fx_fault_tolerant_transaction_start PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is called at the beginning of an update to FileX */
/* file, directory entry, or FAT table. It resets fault tolerant */
/* internal state information. */
/* */
/* INPUT */
/* */
/* media_ptr Media control block pointer */
/* */
/* OUTPUT */
/* */
/* return status */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* _fx_directory_attributes_set */
/* _fx_directory_create */
/* _fx_directory_delete */
/* _fx_directory_rename */
/* _fx_file_allocate */
/* _fx_file_attributes_set */
/* _fx_file_best_effort_allocate */
/* _fx_file_create */
/* _fx_file_delete */
/* _fx_file_rename */
/* _fx_file_truncate */
/* _fx_file_truncate_release */
/* _fx_file_write */
/* _fx_unicode_directory_create */
/* _fx_unicode_file_create */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* 09-30-2020 William E. Lamie Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _fx_fault_tolerant_transaction_start(FX_MEDIA *media_ptr)
{
/* Is fault tolerant enabled? */
if (media_ptr -> fx_media_fault_tolerant_enabled == FX_TRUE)
{
/* Is this a new transaction? */
if (media_ptr -> fx_media_fault_tolerant_transaction_count == 0)
{
/* Yes. Initialize data. */
media_ptr -> fx_media_fault_tolerant_file_size = FX_FAULT_TOLERANT_LOG_HEADER_SIZE +
FX_FAULT_TOLERANT_FAT_CHAIN_SIZE +
FX_FAULT_TOLERANT_LOG_CONTENT_HEADER_SIZE;
/* Reset total logs. */
media_ptr -> fx_media_fault_tolerant_total_logs = 0;
/* Set state of fault tolerant. */
media_ptr -> fx_media_fault_tolerant_state = FX_FAULT_TOLERANT_STATE_STARTED;
}
/* Increase the transaction. */
media_ptr -> fx_media_fault_tolerant_transaction_count++;
}
return(FX_SUCCESS);
}
#endif /* FX_ENABLE_FAULT_TOLERANT */
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