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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"
#include "tx_timer.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _tx_thread_time_slice_change PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function processes thread time slice change requests. The */
/* previous time slice is returned to the caller. If the new request */
/* is made for an executing thread, it is also placed in the actual */
/* time-slice countdown variable. */
/* */
/* INPUT */
/* */
/* thread_ptr Pointer to thread */
/* new_time_slice New time slice */
/* old_time_slice Old time slice */
/* */
/* OUTPUT */
/* */
/* status Service return 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_time_slice_change(TX_THREAD *thread_ptr, ULONG new_time_slice, ULONG *old_time_slice)
{
TX_INTERRUPT_SAVE_AREA
TX_THREAD *current_thread;
/* Lockout interrupts while the thread is being resumed. */
TX_DISABLE
/* If trace is enabled, insert this event into the trace buffer. */
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)
/* Log this kernel call. */
TX_EL_THREAD_TIME_SLICE_CHANGE_INSERT
/* Return the old time slice. */
*old_time_slice = thread_ptr -> tx_thread_new_time_slice;
/* Setup the new time-slice. */
thread_ptr -> tx_thread_time_slice = new_time_slice;
thread_ptr -> tx_thread_new_time_slice = new_time_slice;
/* Pickup thread pointer. */
TX_THREAD_GET_CURRENT(current_thread)
/* Determine if this thread is the currently executing thread. */
if (thread_ptr == current_thread)
{
/* Yes, update the time-slice countdown variable. */
_tx_timer_time_slice = new_time_slice;
}
/* Restore interrupts. */
TX_RESTORE
/* Return completion status. */
return(TX_SUCCESS);
}