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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 */
/** */
/** File */
/** */
/**************************************************************************/
/**************************************************************************/
#define FX_SOURCE_CODE
/* Include necessary system files. */
#include "fx_api.h"
#include "fx_system.h"
#include "fx_file.h"
#include "fx_utility.h"
#include "fx_directory.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _fx_file_close PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function closes the specified file. If the file was written */
/* to this function will also write the directory entry (with the new */
/* size and time/date stamp) out to disk. */
/* */
/* INPUT */
/* */
/* file_ptr File control block pointer */
/* */
/* OUTPUT */
/* */
/* return status */
/* */
/* CALLS */
/* */
/* _fx_directory_entry_write Write the directory entry */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* 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_file_close(FX_FILE *file_ptr)
{
UINT status;
FX_MEDIA *media_ptr;
FX_INT_SAVE_AREA
/* First, determine if the file is still open. */
if (file_ptr -> fx_file_id != FX_FILE_ID)
{
/* Return the file not open error status. */
return(FX_NOT_OPEN);
}
/* Setup a pointer to the associated media. */
media_ptr = file_ptr -> fx_file_media_ptr;
#ifndef FX_MEDIA_STATISTICS_DISABLE
/* Increment the number of times this service has been called. */
media_ptr -> fx_media_file_closes++;
#endif
/* If trace is enabled, insert this event into the trace buffer. */
FX_TRACE_IN_LINE_INSERT(FX_TRACE_FILE_CLOSE, file_ptr, file_ptr -> fx_file_current_file_size, 0, 0, FX_TRACE_FILE_EVENTS, 0, 0)
/* Protect against other threads accessing the media. */
FX_PROTECT
/* If trace is enabled, unregister this object. */
FX_TRACE_OBJECT_UNREGISTER(file_ptr)
/* Remove this file from the opened list for the media. */
/* See if the file is the only one on the open list for this media. */
if (file_ptr == file_ptr -> fx_file_opened_next)
{
/* Only opened file, just set the opened list to NULL. */
media_ptr -> fx_media_opened_file_list = FX_NULL;
}
else
{
/* Otherwise, not the only opened file, link-up the neighbors. */
(file_ptr -> fx_file_opened_next) -> fx_file_opened_previous =
file_ptr -> fx_file_opened_previous;
(file_ptr -> fx_file_opened_previous) -> fx_file_opened_next =
file_ptr -> fx_file_opened_next;
/* See if we have to update the opened list head pointer. */
if (media_ptr -> fx_media_opened_file_list == file_ptr)
{
/* Yes, move the head pointer to the next opened file. */
media_ptr -> fx_media_opened_file_list = file_ptr -> fx_file_opened_next;
}
}
/* Decrement the opened file counter. */
media_ptr -> fx_media_opened_file_count--;
/* Finally, Indicate that this file is closed. */
file_ptr -> fx_file_id = FX_FILE_CLOSED_ID;
/* Check to see if this file needs to have its directory entry written
back to the media. */
if ((file_ptr -> fx_file_open_mode == FX_OPEN_FOR_WRITE) &&
(file_ptr -> fx_file_modified))
{
/* Lockout interrupts for time/date access. */
FX_DISABLE_INTS
/* Set the new time and date. */
file_ptr -> fx_file_dir_entry.fx_dir_entry_time = _fx_system_time;
file_ptr -> fx_file_dir_entry.fx_dir_entry_date = _fx_system_date;
/* Set the last access date. */
file_ptr -> fx_file_dir_entry.fx_dir_entry_last_accessed_date = _fx_system_date;
/* Restore interrupts. */
FX_RESTORE_INTS
/* Copy the new file size into the directory entry. */
file_ptr -> fx_file_dir_entry.fx_dir_entry_file_size =
file_ptr -> fx_file_current_file_size;
/* Write the directory entry to the media. */
#ifdef FX_ENABLE_EXFAT
if (media_ptr -> fx_media_FAT_type == FX_exFAT)
{
status = _fx_directory_exFAT_entry_write(
media_ptr, &(file_ptr -> fx_file_dir_entry), UPDATE_STREAM);
}
else
{
#endif /* FX_ENABLE_EXFAT */
status = _fx_directory_entry_write(media_ptr, &(file_ptr -> fx_file_dir_entry));
#ifdef FX_ENABLE_EXFAT
}
#endif /* FX_ENABLE_EXFAT */
/* Check for a good status. */
if (status != FX_SUCCESS)
{
/* Release media protection. */
FX_UNPROTECT
/* Error writing the directory. */
return(status);
}
}
/* Release media protection. */
FX_UNPROTECT
/* Return status to the caller. */
return(FX_SUCCESS);
}