132 lines
6.2 KiB
C
132 lines
6.2 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_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_priority_change PORTABLE C */
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/* 6.0 */
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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 change priority function */
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/* call. */
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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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/* new_priority New thread priority */
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/* old_priority Old thread priority */
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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 priority 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_priority_change Actual priority change */
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/* 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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/* */
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/**************************************************************************/
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UINT _txe_thread_priority_change(TX_THREAD *thread_ptr, UINT new_priority, UINT *old_priority)
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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 priority pointer. */
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else if (old_priority == 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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/* Determine if the priority is legal. */
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else if (new_priority >= ((UINT) TX_MAX_PRIORITIES))
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{
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/* Return an error status. */
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status = TX_PRIORITY_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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else
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{
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/* Call actual change thread priority function. */
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status = _tx_thread_priority_change(thread_ptr, new_priority, old_priority);
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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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