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