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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** ThreadX Component */
/** */
/** Thread */
/** */
/**************************************************************************/
/**************************************************************************/
#define TX_SOURCE_CODE
#define TX_THREAD_SMP_SOURCE_CODE
/* Include necessary system files. */
#include "tx_api.h"
#include "tx_thread.h"
#include "tx_timer.h"
#include "tx_trace.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _tx_thread_time_slice_change PORTABLE SMP */
/* 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 */
/* */
/**************************************************************************/
UINT _tx_thread_time_slice_change(TX_THREAD *thread_ptr, ULONG new_time_slice, ULONG *old_time_slice)
{
TX_INTERRUPT_SAVE_AREA
ULONG core_index;
/* 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 index. */
core_index = thread_ptr -> tx_thread_smp_core_mapped;
/* Determine if this thread is the currently executing thread. */
#ifndef TX_THREAD_SMP_DYNAMIC_CORE_MAX
if ((core_index < ((ULONG) TX_THREAD_SMP_MAX_CORES)) && (thread_ptr == _tx_thread_current_ptr[core_index]))
#else
if ((core_index < _tx_thread_smp_max_cores) && (thread_ptr == _tx_thread_current_ptr[core_index]))
#endif
{
/* Yes, update the time-slice countdown variable. */
_tx_timer_time_slice[core_index] = new_time_slice;
}
/* Restore interrupts. */
TX_RESTORE
/* Return completion status. */
return(TX_SUCCESS);
}
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