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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_trace.h"
#include "tx_thread.h"
#include "tx_initialize.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _tx_thread_resume PORTABLE SMP */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function processes application resume thread services. Actual */
/* thread resumption is performed in the core service. */
/* */
/* INPUT */
/* */
/* thread_ptr Pointer to thread to resume */
/* */
/* OUTPUT */
/* */
/* status Service return status */
/* */
/* CALLS */
/* */
/* _tx_thread_smp_rebalance_execute_list Rebalance the execution list */
/* _tx_thread_system_resume Resume thread */
/* _tx_thread_system_ni_resume Non-interruptable resume */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
UINT _tx_thread_resume(TX_THREAD *thread_ptr)
{
TX_INTERRUPT_SAVE_AREA
UINT status;
UINT 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_RESUME_API, thread_ptr, thread_ptr -> tx_thread_state, TX_POINTER_TO_ULONG_CONVERT(&status), 0, TX_TRACE_THREAD_EVENTS)
/* Log this kernel call. */
TX_EL_THREAD_RESUME_INSERT
/* Determine if the thread is suspended or in the process of suspending.
If so, call the thread resume processing. */
if (thread_ptr -> tx_thread_state == TX_SUSPENDED)
{
#ifdef TX_NOT_INTERRUPTABLE
/* Resume the thread! */
_tx_thread_system_ni_resume(thread_ptr);
/* Restore interrupts. */
TX_RESTORE
#else
/* Temporarily disable preemption. */
_tx_thread_preempt_disable++;
/* Restore interrupts. */
TX_RESTORE
/* Call the actual resume service to resume the thread. */
_tx_thread_system_resume(thread_ptr);
#endif
/* Disable interrupts. */
TX_DISABLE
/* Determine if the thread's preemption-threshold needs to be restored. */
if (_tx_thread_smp_current_state_get() >= TX_INITIALIZE_IN_PROGRESS)
{
#ifndef TX_DISABLE_PREEMPTION_THRESHOLD
/* Clear the preemption bit maps, since nothing has yet run during initialization. */
TX_MEMSET(_tx_thread_preempted_maps, 0, sizeof(_tx_thread_preempted_maps));
#if TX_MAX_PRIORITIES > 32
_tx_thread_preempted_map_active = ((ULONG) 0);
#endif
#endif
_tx_thread_preemption__threshold_scheduled = TX_NULL;
#ifdef TX_THREAD_SMP_DEBUG_ENABLE
/* Debug entry. */
_tx_thread_smp_debug_entry_insert(14, 0, thread_ptr);
#endif
/* Get the core index. */
core_index = TX_SMP_CORE_ID;
/* Call the rebalance routine. This routine maps cores and ready threads. */
_tx_thread_smp_rebalance_execute_list(core_index);
#ifdef TX_THREAD_SMP_DEBUG_ENABLE
/* Debug entry. */
_tx_thread_smp_debug_entry_insert(15, 0, thread_ptr);
#endif
}
/* Setup successful return status. */
status = TX_SUCCESS;
}
else if (thread_ptr -> tx_thread_delayed_suspend != TX_FALSE)
{
/* Clear the delayed suspension. */
thread_ptr -> tx_thread_delayed_suspend = TX_FALSE;
/* Setup delayed suspend lifted return status. */
status = TX_SUSPEND_LIFTED;
}
else
{
/* Setup invalid resume return status. */
status = TX_RESUME_ERROR;
}
/* Restore interrupts. */
TX_RESTORE
/* Return completion status. */
return(status);
}
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