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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 */
/** */
/** Media */
/** */
/**************************************************************************/
/**************************************************************************/
#define FX_SOURCE_CODE
/* Include necessary system files. */
#include "fx_api.h"
#include "fx_system.h"
#include "fx_media.h"
#include "fx_file.h"
#include "fx_utility.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _fx_media_abort PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function marks all open files for the specified media as */
/* aborted and then removes the media control block from the open */
/* media list and marks it as aborted as well. */
/* */
/* INPUT */
/* */
/* media_ptr Media control block pointer */
/* */
/* OUTPUT */
/* */
/* return status */
/* */
/* CALLS */
/* */
/* tx_mutex_delete Delete the mutex */
/* */
/* 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_media_abort(FX_MEDIA *media_ptr)
{
FX_INT_SAVE_AREA
ULONG open_count;
FX_FILE *file_ptr;
#ifndef FX_MEDIA_STATISTICS_DISABLE
/* Increment the number of times this service has been called. */
media_ptr -> fx_media_aborts++;
#endif
/* Check the media to make sure it is open. */
if (media_ptr -> fx_media_id != FX_MEDIA_ID)
{
/* Return the media not opened error. */
return(FX_MEDIA_NOT_OPEN);
}
/* If trace is enabled, insert this event into the trace buffer. */
FX_TRACE_IN_LINE_INSERT(FX_TRACE_MEDIA_ABORT, media_ptr, 0, 0, 0, FX_TRACE_MEDIA_EVENTS, 0, 0)
/* Protect against other threads accessing the media. */
FX_PROTECT
/* Loop through the media's open files. */
open_count = media_ptr -> fx_media_opened_file_count;
file_ptr = media_ptr -> fx_media_opened_file_list;
while (open_count)
{
/* Mark the file as aborted. */
file_ptr -> fx_file_id = FX_FILE_ABORTED_ID;
/* Adjust the pointer and decrement the file opened count. */
file_ptr = file_ptr -> fx_file_opened_next;
open_count--;
}
/* Build the "abort" I/O driver request. */
media_ptr -> fx_media_driver_request = FX_DRIVER_ABORT;
media_ptr -> fx_media_driver_status = FX_IO_ERROR;
/* If trace is enabled, insert this event into the trace buffer. */
FX_TRACE_IN_LINE_INSERT(FX_TRACE_INTERNAL_IO_DRIVER_ABORT, media_ptr, 0, 0, 0, FX_TRACE_INTERNAL_EVENTS, 0, 0)
/* Call the specified I/O driver with the abort request. */
(media_ptr -> fx_media_driver_entry) (media_ptr);
/* Now remove this media from the open list. */
/* Lockout interrupts for media removal. */
FX_DISABLE_INTS
/* See if the media is the only one on the media opened list. */
if (_fx_system_media_opened_count == ((ULONG) 1))
{
/* Only opened media, just set the opened list to NULL. */
_fx_system_media_opened_ptr = FX_NULL;
}
else
{
/* Otherwise, not the only opened media, link-up the neighbors. */
(media_ptr -> fx_media_opened_next) -> fx_media_opened_previous =
media_ptr -> fx_media_opened_previous;
(media_ptr -> fx_media_opened_previous) -> fx_media_opened_next =
media_ptr -> fx_media_opened_next;
/* See if we have to update the opened list head pointer. */
if (_fx_system_media_opened_ptr == media_ptr)
{
/* Yes, move the head pointer to the next opened media. */
_fx_system_media_opened_ptr = media_ptr -> fx_media_opened_next;
}
}
/* Decrement the opened media counter. */
_fx_system_media_opened_count--;
/* Finally, Indicate that this media is aborted. */
media_ptr -> fx_media_id = FX_MEDIA_ABORTED_ID;
/* Restore interrupt posture. */
FX_RESTORE_INTS
/* Delete the media protection structure if FX_SINGLE_THREAD is not
defined. */
#ifndef FX_SINGLE_THREAD
#ifndef FX_DONT_CREATE_MUTEX
/* Note that the protection is never released. The mutex delete
service will handle all threads waiting access to this media
control block. */
tx_mutex_delete(& (media_ptr -> fx_media_protect));
#endif
#endif
#ifdef FX_DONT_CREATE_MUTEX
/* Release media protection. */
FX_UNPROTECT
#endif
/* Return status to the caller. */
return(FX_SUCCESS);
}