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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. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** ThreadX Component */
/** */
/** Thread */
/** */
/**************************************************************************/
/**************************************************************************/
#define TX_SOURCE_CODE
/* Include necessary system files. */
#include "tx_api.h"
#include "tx_trace.h"
#include "tx_thread.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _tx_thread_delete PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function handles application delete thread requests. The */
/* thread to delete must be in a terminated or completed state, */
/* otherwise this function just returns an error code. */
/* */
/* INPUT */
/* */
/* thread_ptr Pointer to thread to suspend */
/* */
/* OUTPUT */
/* */
/* status Return completion status */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* Application code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* 09-30-2020 Yuxin Zhou Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _tx_thread_delete(TX_THREAD *thread_ptr)
{
TX_INTERRUPT_SAVE_AREA
TX_THREAD *next_thread;
TX_THREAD *previous_thread;
UINT status;
/* Default status to success. */
status = TX_SUCCESS;
/* Lockout interrupts while the thread is being deleted. */
TX_DISABLE
/* Check for proper status of this thread to delete. */
if (thread_ptr -> tx_thread_state != TX_COMPLETED)
{
/* Now check for terminated state. */
if (thread_ptr -> tx_thread_state != TX_TERMINATED)
{
/* Restore interrupts. */
TX_RESTORE
/* Thread not completed or terminated - return an error! */
status = TX_DELETE_ERROR;
}
}
/* Determine if the delete operation is okay. */
if (status == TX_SUCCESS)
{
/* Yes, continue with deleting the thread. */
/* Perform any additional activities for tool or user purpose. */
TX_THREAD_DELETE_EXTENSION(thread_ptr)
/* If trace is enabled, insert this event into the trace buffer. */
TX_TRACE_IN_LINE_INSERT(TX_TRACE_THREAD_DELETE, thread_ptr, TX_POINTER_TO_ULONG_CONVERT(&next_thread), 0, 0, TX_TRACE_THREAD_EVENTS)
/* If trace is enabled, unregister this object. */
TX_TRACE_OBJECT_UNREGISTER(thread_ptr)
/* Log this kernel call. */
TX_EL_THREAD_DELETE_INSERT
/* Unregister thread in the thread array structure. */
TX_EL_THREAD_UNREGISTER(thread_ptr)
/* Clear the thread ID to make it invalid. */
thread_ptr -> tx_thread_id = TX_CLEAR_ID;
/* Decrement the number of created threads. */
_tx_thread_created_count--;
/* See if the thread is the only one on the list. */
if (_tx_thread_created_count == TX_EMPTY)
{
/* Only created thread, just set the created list to NULL. */
_tx_thread_created_ptr = TX_NULL;
}
else
{
/* Otherwise, not the only created thread, link-up the neighbors. */
next_thread = thread_ptr -> tx_thread_created_next;
previous_thread = thread_ptr -> tx_thread_created_previous;
next_thread -> tx_thread_created_previous = previous_thread;
previous_thread -> tx_thread_created_next = next_thread;
/* See if we have to update the created list head pointer. */
if (_tx_thread_created_ptr == thread_ptr)
{
/* Yes, move the head pointer to the next link. */
_tx_thread_created_ptr = next_thread;
}
}
/* Execute Port-Specific completion processing. If needed, it is typically defined in tx_port.h. */
TX_THREAD_DELETE_PORT_COMPLETION(thread_ptr)
/* Restore interrupts. */
TX_RESTORE
}
/* Return completion status. */
return(status);
}