133 lines
6.3 KiB
C
133 lines
6.3 KiB
C
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/**************************************************************************/
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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_thread.h"
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/**************************************************************************/
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/* */
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/* FUNCTION RELEASE */
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/* */
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/* _txe_thread_preemption_change 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 checks for errors in the preemption threshold change */
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/* function call. */
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/* */
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/* INPUT */
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/* */
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/* thread_ptr Pointer to thread */
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/* new_threshold New preemption threshold */
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/* old_threshold Old preemption threshold */
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/* */
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/* OUTPUT */
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/* */
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/* TX_THREAD_ERROR Invalid thread pointer */
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/* TX_PTR_ERROR Invalid old threshold pointer */
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/* TX_CALLER_ERROR Invalid caller of function */
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/* status Actual completion status */
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/* */
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/* CALLS */
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/* */
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/* _tx_thread_preemption_change Actual preempt change function*/
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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 _txe_thread_preemption_change(TX_THREAD *thread_ptr, UINT new_threshold, UINT *old_threshold)
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{
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UINT status;
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/* Check for an invalid thread pointer. */
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if (thread_ptr == TX_NULL)
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{
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/* Thread pointer is invalid, return appropriate error code. */
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status = TX_THREAD_ERROR;
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}
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/* Now check for invalid thread ID. */
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else if (thread_ptr -> tx_thread_id != TX_THREAD_ID)
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{
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/* Thread pointer is invalid, return appropriate error code. */
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status = TX_THREAD_ERROR;
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}
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/* Check for a valid old threshold pointer. */
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else if (old_threshold == TX_NULL)
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{
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/* Invalid destination pointer, return appropriate error code. */
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status = TX_PTR_ERROR;
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}
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/* Check for invalid caller of this function. */
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else if (TX_THREAD_GET_SYSTEM_STATE() != ((ULONG) 0))
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{
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/* Invalid caller of this function, return appropriate error code. */
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status = TX_CALLER_ERROR;
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}
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/* Determine if the preemption-threshold is valid. */
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else if (new_threshold > thread_ptr -> tx_thread_user_priority)
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{
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/* Return an error status. */
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status = TX_THRESH_ERROR;
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}
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else
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{
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/* Call actual change thread preemption function. */
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status = _tx_thread_preemption_change(thread_ptr, new_threshold, old_threshold);
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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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