120 lines
6.1 KiB
C
120 lines
6.1 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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#include "tx_timer.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_time_slice_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 processes thread time slice change requests. The */
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/* previous time slice is returned to the caller. If the new request */
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/* is made for an executing thread, it is also placed in the actual */
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/* time-slice countdown variable. */
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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_time_slice New time slice */
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/* old_time_slice Old time slice */
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/* */
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/* OUTPUT */
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/* */
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/* status Service return 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_time_slice_change(TX_THREAD *thread_ptr, ULONG new_time_slice, ULONG *old_time_slice)
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{
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TX_INTERRUPT_SAVE_AREA
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TX_THREAD *current_thread;
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/* Lockout interrupts while the thread is being resumed. */
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TX_DISABLE
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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_TIME_SLICE_CHANGE, thread_ptr, new_time_slice, thread_ptr -> tx_thread_new_time_slice, 0, TX_TRACE_THREAD_EVENTS)
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/* Log this kernel call. */
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TX_EL_THREAD_TIME_SLICE_CHANGE_INSERT
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/* Return the old time slice. */
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*old_time_slice = thread_ptr -> tx_thread_new_time_slice;
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/* Setup the new time-slice. */
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thread_ptr -> tx_thread_time_slice = new_time_slice;
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thread_ptr -> tx_thread_new_time_slice = new_time_slice;
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/* Pickup thread pointer. */
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TX_THREAD_GET_CURRENT(current_thread)
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/* Determine if this thread is the currently executing thread. */
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if (thread_ptr == current_thread)
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{
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/* Yes, update the time-slice countdown variable. */
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_tx_timer_time_slice = new_time_slice;
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}
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/* Restore interrupts. */
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TX_RESTORE
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/* Return completion status. */
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return(TX_SUCCESS);
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}
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