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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"
#ifdef TX_THREAD_ENABLE_PERFORMANCE_INFO
#include "tx_initialize.h"
#endif
#include "tx_trace.h"
#include "tx_timer.h"
#include "tx_thread.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _tx_thread_system_resume PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function places the specified thread on the list of ready */
/* threads at the thread's specific priority. */
/* */
/* INPUT */
/* */
/* thread_ptr Pointer to thread to resume */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _tx_thread_system_return Return to the system */
/* _tx_thread_system_ni_resume Noninterruptable thread resume*/
/* _tx_timer_system_deactivate Timer deactivate */
/* */
/* CALLED BY */
/* */
/* _tx_thread_create Thread create function */
/* _tx_thread_priority_change Thread priority change */
/* _tx_thread_resume Application resume service */
/* _tx_thread_timeout Thread timeout */
/* _tx_thread_wait_abort Thread wait abort */
/* Other ThreadX Components */
/* */
/* 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 */
/* */
/**************************************************************************/
VOID _tx_thread_system_resume(TX_THREAD *thread_ptr)
#ifndef TX_NOT_INTERRUPTABLE
{
TX_INTERRUPT_SAVE_AREA
UINT priority;
ULONG priority_bit;
TX_THREAD *head_ptr;
TX_THREAD *tail_ptr;
TX_THREAD *execute_ptr;
TX_THREAD *current_thread;
ULONG combined_flags;
#ifdef TX_ENABLE_EVENT_TRACE
TX_TRACE_BUFFER_ENTRY *entry_ptr;
ULONG time_stamp = ((ULONG) 0);
#endif
#if TX_MAX_PRIORITIES > 32
UINT map_index;
#endif
#ifdef TX_ENABLE_STACK_CHECKING
/* Check this thread's stack. */
TX_THREAD_STACK_CHECK(thread_ptr)
#endif
/* Lockout interrupts while the thread is being resumed. */
TX_DISABLE
#ifndef TX_NO_TIMER
/* Deactivate the timeout timer if necessary. */
if (thread_ptr -> tx_thread_timer.tx_timer_internal_list_head != TX_NULL)
{
/* Deactivate the thread's timeout timer. */
_tx_timer_system_deactivate(&(thread_ptr -> tx_thread_timer));
}
else
{
/* Clear the remaining time to ensure timer doesn't get activated. */
thread_ptr -> tx_thread_timer.tx_timer_internal_remaining_ticks = ((ULONG) 0);
}
#endif
#ifdef TX_ENABLE_EVENT_TRACE
/* If trace is enabled, save the current event pointer. */
entry_ptr = _tx_trace_buffer_current_ptr;
#endif
/* Log the thread status change. */
TX_TRACE_IN_LINE_INSERT(TX_TRACE_THREAD_RESUME, thread_ptr, thread_ptr -> tx_thread_state, TX_POINTER_TO_ULONG_CONVERT(&execute_ptr), TX_POINTER_TO_ULONG_CONVERT(_tx_thread_execute_ptr), TX_TRACE_INTERNAL_EVENTS)
#ifdef TX_ENABLE_EVENT_TRACE
/* Save the time stamp for later comparison to verify that
the event hasn't been overwritten by the time we have
computed the next thread to execute. */
if (entry_ptr != TX_NULL)
{
/* Save time stamp. */
time_stamp = entry_ptr -> tx_trace_buffer_entry_time_stamp;
}
#endif
/* Decrease the preempt disabled count. */
_tx_thread_preempt_disable--;
/* Determine if the thread is in the process of suspending. If so, the thread
control block is already on the linked list so nothing needs to be done. */
if (thread_ptr -> tx_thread_suspending == TX_FALSE)
{
/* Thread is not in the process of suspending. Now check to make sure the thread
has not already been resumed. */
if (thread_ptr -> tx_thread_state != TX_READY)
{
/* No, now check to see if the delayed suspension flag is set. */
if (thread_ptr -> tx_thread_delayed_suspend == TX_FALSE)
{
/* Resume the thread! */
/* Make this thread ready. */
/* Change the state to ready. */
thread_ptr -> tx_thread_state = TX_READY;
/* Pickup priority of thread. */
priority = thread_ptr -> tx_thread_priority;
/* Thread state change. */
TX_THREAD_STATE_CHANGE(thread_ptr, TX_READY)
/* Log the thread status change. */
TX_EL_THREAD_STATUS_CHANGE_INSERT(thread_ptr, TX_READY)
#ifdef TX_THREAD_ENABLE_PERFORMANCE_INFO
/* Increment the total number of thread resumptions. */
_tx_thread_performance_resume_count++;
/* Increment this thread's resume count. */
thread_ptr -> tx_thread_performance_resume_count++;
#endif
/* Determine if there are other threads at this priority that are
ready. */
head_ptr = _tx_thread_priority_list[priority];
if (head_ptr == TX_NULL)
{
/* First thread at this priority ready. Add to the front of the list. */
_tx_thread_priority_list[priority] = thread_ptr;
thread_ptr -> tx_thread_ready_next = thread_ptr;
thread_ptr -> tx_thread_ready_previous = thread_ptr;
#if TX_MAX_PRIORITIES > 32
/* Calculate the index into the bit map array. */
map_index = priority/((UINT) 32);
/* Set the active bit to remember that the priority map has something set. */
TX_DIV32_BIT_SET(priority, priority_bit)
_tx_thread_priority_map_active = _tx_thread_priority_map_active | priority_bit;
#endif
/* Or in the thread's priority bit. */
TX_MOD32_BIT_SET(priority, priority_bit)
_tx_thread_priority_maps[MAP_INDEX] = _tx_thread_priority_maps[MAP_INDEX] | priority_bit;
/* Determine if this newly ready thread is the highest priority. */
if (priority < _tx_thread_highest_priority)
{
/* A new highest priority thread is present. */
/* Update the highest priority variable. */
_tx_thread_highest_priority = priority;
/* Pickup the execute pointer. Since it is going to be referenced multiple
times, it is placed in a local variable. */
execute_ptr = _tx_thread_execute_ptr;
/* Determine if no thread is currently executing. */
if (execute_ptr == TX_NULL)
{
/* Simply setup the execute pointer. */
_tx_thread_execute_ptr = thread_ptr;
}
else
{
/* Another thread has been scheduled for execution. */
/* Check to see if this is a higher priority thread and determine if preemption is allowed. */
if (priority < execute_ptr -> tx_thread_preempt_threshold)
{
#ifndef TX_DISABLE_PREEMPTION_THRESHOLD
/* Determine if the preempted thread had preemption-threshold set. */
if (execute_ptr -> tx_thread_preempt_threshold != execute_ptr -> tx_thread_priority)
{
#if TX_MAX_PRIORITIES > 32
/* Calculate the index into the bit map array. */
map_index = (execute_ptr -> tx_thread_priority)/((UINT) 32);
/* Set the active bit to remember that the preempt map has something set. */
TX_DIV32_BIT_SET(execute_ptr -> tx_thread_priority, priority_bit)
_tx_thread_preempted_map_active = _tx_thread_preempted_map_active | priority_bit;
#endif
/* Remember that this thread was preempted by a thread above the thread's threshold. */
TX_MOD32_BIT_SET(execute_ptr -> tx_thread_priority, priority_bit)
_tx_thread_preempted_maps[MAP_INDEX] = _tx_thread_preempted_maps[MAP_INDEX] | priority_bit;
}
#endif
#ifdef TX_THREAD_ENABLE_PERFORMANCE_INFO
/* Determine if the caller is an interrupt or from a thread. */
if (TX_THREAD_GET_SYSTEM_STATE() == ((ULONG) 0))
{
/* Caller is a thread, so this is a solicited preemption. */
_tx_thread_performance_solicited_preemption_count++;
/* Increment the thread's solicited preemption counter. */
execute_ptr -> tx_thread_performance_solicited_preemption_count++;
}
else
{
if (TX_THREAD_GET_SYSTEM_STATE() < TX_INITIALIZE_IN_PROGRESS)
{
/* Caller is an interrupt, so this is an interrupt preemption. */
_tx_thread_performance_interrupt_preemption_count++;
/* Increment the thread's interrupt preemption counter. */
execute_ptr -> tx_thread_performance_interrupt_preemption_count++;
}
}
/* Remember the thread that preempted this thread. */
execute_ptr -> tx_thread_performance_last_preempting_thread = thread_ptr;
#endif
/* Yes, modify the execute thread pointer. */
_tx_thread_execute_ptr = thread_ptr;
#ifndef TX_MISRA_ENABLE
/* If MISRA is not-enabled, insert a preemption and return in-line for performance. */
#ifdef TX_THREAD_ENABLE_PERFORMANCE_INFO
/* Is the execute pointer different? */
if (_tx_thread_performance_execute_log[_tx_thread_performance__execute_log_index] != _tx_thread_execute_ptr)
{
/* Move to next entry. */
_tx_thread_performance__execute_log_index++;
/* Check for wrap condition. */
if (_tx_thread_performance__execute_log_index >= TX_THREAD_EXECUTE_LOG_SIZE)
{
/* Set the index to the beginning. */
_tx_thread_performance__execute_log_index = ((UINT) 0);
}
/* Log the new execute pointer. */
_tx_thread_performance_execute_log[_tx_thread_performance__execute_log_index] = _tx_thread_execute_ptr;
}
#endif
#ifdef TX_ENABLE_EVENT_TRACE
/* Check that the event time stamp is unchanged. A different
timestamp means that a later event wrote over the thread
resume event. In that case, do nothing here. */
if (entry_ptr != TX_NULL)
{
/* Is the timestamp the same? */
if (time_stamp == entry_ptr -> tx_trace_buffer_entry_time_stamp)
{
/* Timestamp is the same, set the "next thread pointer" to NULL. This can
be used by the trace analysis tool to show idle system conditions. */
entry_ptr -> tx_trace_buffer_entry_information_field_4 = TX_POINTER_TO_ULONG_CONVERT(_tx_thread_execute_ptr);
}
}
#endif
/* Restore interrupts. */
TX_RESTORE
#ifdef TX_ENABLE_STACK_CHECKING
/* Pickup the next execute pointer. */
thread_ptr = _tx_thread_execute_ptr;
/* Check this thread's stack. */
TX_THREAD_STACK_CHECK(thread_ptr)
#endif
/* Now determine if preemption should take place. This is only possible if the current thread pointer is
not the same as the execute thread pointer AND the system state and preempt disable flags are clear. */
TX_THREAD_SYSTEM_RETURN_CHECK(combined_flags)
if (combined_flags == ((ULONG) 0))
{
#ifdef TX_THREAD_ENABLE_PERFORMANCE_INFO
/* There is another thread ready to run and will be scheduled upon return. */
_tx_thread_performance_non_idle_return_count++;
#endif
/* Preemption is needed - return to the system! */
_tx_thread_system_return();
}
/* Return in-line when MISRA is not enabled. */
return;
#endif
}
}
}
}
else
{
/* No, there are other threads at this priority already ready. */
/* Just add this thread to the priority list. */
tail_ptr = head_ptr -> tx_thread_ready_previous;
tail_ptr -> tx_thread_ready_next = thread_ptr;
head_ptr -> tx_thread_ready_previous = thread_ptr;
thread_ptr -> tx_thread_ready_previous = tail_ptr;
thread_ptr -> tx_thread_ready_next = head_ptr;
}
}
/* Else, delayed suspend flag was set. */
else
{
/* Clear the delayed suspend flag and change the state. */
thread_ptr -> tx_thread_delayed_suspend = TX_FALSE;
thread_ptr -> tx_thread_state = TX_SUSPENDED;
}
}
}
else
{
/* A resumption occurred in the middle of a previous thread suspension. */
/* Make sure the type of suspension under way is not a terminate or
thread completion. In either of these cases, do not void the
interrupted suspension processing. */
if (thread_ptr -> tx_thread_state != TX_COMPLETED)
{
/* Make sure the thread isn't terminated. */
if (thread_ptr -> tx_thread_state != TX_TERMINATED)
{
/* No, now check to see if the delayed suspension flag is set. */
if (thread_ptr -> tx_thread_delayed_suspend == TX_FALSE)
{
/* Clear the suspending flag. */
thread_ptr -> tx_thread_suspending = TX_FALSE;
/* Restore the state to ready. */
thread_ptr -> tx_thread_state = TX_READY;
/* Thread state change. */
TX_THREAD_STATE_CHANGE(thread_ptr, TX_READY)
/* Log the thread status change. */
TX_EL_THREAD_STATUS_CHANGE_INSERT(thread_ptr, TX_READY)
}
else
{
/* Clear the delayed suspend flag and change the state. */
thread_ptr -> tx_thread_delayed_suspend = TX_FALSE;
thread_ptr -> tx_thread_state = TX_SUSPENDED;
}
#ifdef TX_THREAD_ENABLE_PERFORMANCE_INFO
/* Increment the total number of thread resumptions. */
_tx_thread_performance_resume_count++;
/* Increment this thread's resume count. */
thread_ptr -> tx_thread_performance_resume_count++;
#endif
}
}
}
#ifdef TX_THREAD_ENABLE_PERFORMANCE_INFO
/* Is the execute pointer different? */
if (_tx_thread_performance_execute_log[_tx_thread_performance__execute_log_index] != _tx_thread_execute_ptr)
{
/* Move to next entry. */
_tx_thread_performance__execute_log_index++;
/* Check for wrap condition. */
if (_tx_thread_performance__execute_log_index >= TX_THREAD_EXECUTE_LOG_SIZE)
{
/* Set the index to the beginning. */
_tx_thread_performance__execute_log_index = ((UINT) 0);
}
/* Log the new execute pointer. */
_tx_thread_performance_execute_log[_tx_thread_performance__execute_log_index] = _tx_thread_execute_ptr;
}
#endif
#ifdef TX_ENABLE_EVENT_TRACE
/* Check that the event time stamp is unchanged. A different
timestamp means that a later event wrote over the thread
resume event. In that case, do nothing here. */
if (entry_ptr != TX_NULL)
{
/* Is the timestamp the same? */
if (time_stamp == entry_ptr -> tx_trace_buffer_entry_time_stamp)
{
/* Timestamp is the same, set the "next thread pointer" to NULL. This can
be used by the trace analysis tool to show idle system conditions. */
#ifdef TX_MISRA_ENABLE
entry_ptr -> tx_trace_buffer_entry_info_4 = TX_POINTER_TO_ULONG_CONVERT(_tx_thread_execute_ptr);
#else
entry_ptr -> tx_trace_buffer_entry_information_field_4 = TX_POINTER_TO_ULONG_CONVERT(_tx_thread_execute_ptr);
#endif
}
}
#endif
/* Pickup thread pointer. */
TX_THREAD_GET_CURRENT(current_thread)
/* Restore interrupts. */
TX_RESTORE
/* Determine if a preemption condition is present. */
if (current_thread != _tx_thread_execute_ptr)
{
#ifdef TX_ENABLE_STACK_CHECKING
/* Pickup the next execute pointer. */
thread_ptr = _tx_thread_execute_ptr;
/* Check this thread's stack. */
TX_THREAD_STACK_CHECK(thread_ptr)
#endif
/* Now determine if preemption should take place. This is only possible if the current thread pointer is
not the same as the execute thread pointer AND the system state and preempt disable flags are clear. */
TX_THREAD_SYSTEM_RETURN_CHECK(combined_flags)
if (combined_flags == ((ULONG) 0))
{
#ifdef TX_THREAD_ENABLE_PERFORMANCE_INFO
/* There is another thread ready to run and will be scheduled upon return. */
_tx_thread_performance_non_idle_return_count++;
#endif
/* Preemption is needed - return to the system! */
_tx_thread_system_return();
}
}
}
#else
{
TX_INTERRUPT_SAVE_AREA
#ifdef TX_ENABLE_EVENT_TRACE
UINT temp_state;
#endif
UINT state;
/* Lockout interrupts while the thread is being resumed. */
TX_DISABLE
/* Decrease the preempt disabled count. */
_tx_thread_preempt_disable--;
/* Determine if the thread is in the process of suspending. If so, the thread
control block is already on the linked list so nothing needs to be done. */
if (thread_ptr -> tx_thread_suspending == TX_FALSE)
{
/* Call the non-interruptable thread system resume function. */
_tx_thread_system_ni_resume(thread_ptr);
}
else
{
/* A resumption occurred in the middle of a previous thread suspension. */
/* Pickup the current thread state. */
state = thread_ptr -> tx_thread_state;
#ifdef TX_ENABLE_EVENT_TRACE
/* Move the state into a different variable for MISRA compliance. */
temp_state = state;
#endif
/* Log the thread status change. */
TX_TRACE_IN_LINE_INSERT(TX_TRACE_THREAD_RESUME, thread_ptr, ((ULONG) state), TX_POINTER_TO_ULONG_CONVERT(&temp_state), TX_POINTER_TO_ULONG_CONVERT(_tx_thread_execute_ptr), TX_TRACE_INTERNAL_EVENTS)
/* Make sure the type of suspension under way is not a terminate or
thread completion. In either of these cases, do not void the
interrupted suspension processing. */
if (state != TX_COMPLETED)
{
/* Check for terminated thread. */
if (state != TX_TERMINATED)
{
/* Clear the suspending flag. */
thread_ptr -> tx_thread_suspending = TX_FALSE;
/* Restore the state to ready. */
thread_ptr -> tx_thread_state = TX_READY;
/* Thread state change. */
TX_THREAD_STATE_CHANGE(thread_ptr, TX_READY)
/* Log the thread status change. */
TX_EL_THREAD_STATUS_CHANGE_INSERT(thread_ptr, TX_READY)
#ifdef TX_THREAD_ENABLE_PERFORMANCE_INFO
/* Increment the total number of thread resumptions. */
_tx_thread_performance_resume_count++;
/* Increment this thread's resume count. */
thread_ptr -> tx_thread_performance_resume_count++;
#endif
}
}
}
/* Restore interrupts. */
TX_RESTORE
}
/* Define the non-interruptable version of thread resume. It is assumed at this point that
all interrupts are disabled and will remain so during this function. */
VOID _tx_thread_system_ni_resume(TX_THREAD *thread_ptr)
{
UINT priority;
ULONG priority_bit;
TX_THREAD *head_ptr;
TX_THREAD *tail_ptr;
TX_THREAD *execute_ptr;
TX_THREAD *current_thread;
ULONG combined_flags;
#ifdef TX_ENABLE_EVENT_TRACE
TX_TRACE_BUFFER_ENTRY *entry_ptr;
ULONG time_stamp = ((ULONG) 0);
#endif
#if TX_MAX_PRIORITIES > 32
UINT map_index;
#endif
#ifdef TX_ENABLE_EVENT_TRACE
/* If trace is enabled, save the current event pointer. */
entry_ptr = _tx_trace_buffer_current_ptr;
#endif
/* Log the thread status change. */
TX_TRACE_IN_LINE_INSERT(TX_TRACE_THREAD_RESUME, thread_ptr, ((ULONG) thread_ptr -> tx_thread_state), TX_POINTER_TO_ULONG_CONVERT(&execute_ptr), TX_POINTER_TO_ULONG_CONVERT(_tx_thread_execute_ptr), TX_TRACE_INTERNAL_EVENTS)
#ifdef TX_ENABLE_EVENT_TRACE
/* Save the time stamp for later comparison to verify that
the event hasn't been overwritten by the time we have
computed the next thread to execute. */
if (entry_ptr != TX_NULL)
{
/* Save time stamp. */
time_stamp = entry_ptr -> tx_trace_buffer_entry_time_stamp;
}
#endif
#ifndef TX_NO_TIMER
/* Deactivate the timeout timer if necessary. */
if (thread_ptr -> tx_thread_timer.tx_timer_internal_list_head != TX_NULL)
{
/* Deactivate the thread's timeout timer. */
_tx_timer_system_deactivate(&(thread_ptr -> tx_thread_timer));
}
#endif
#ifdef TX_ENABLE_STACK_CHECKING
/* Check this thread's stack. */
TX_THREAD_STACK_CHECK(thread_ptr)
#endif
/* Thread is not in the process of suspending. Now check to make sure the thread
has not already been resumed. */
if (thread_ptr -> tx_thread_state != TX_READY)
{
/* No, now check to see if the delayed suspension flag is set. */
if (thread_ptr -> tx_thread_delayed_suspend == TX_FALSE)
{
/* Resume the thread! */
/* Make this thread ready. */
/* Change the state to ready. */
thread_ptr -> tx_thread_state = TX_READY;
/* Thread state change. */
TX_THREAD_STATE_CHANGE(thread_ptr, TX_READY)
/* Log the thread status change. */
TX_EL_THREAD_STATUS_CHANGE_INSERT(thread_ptr, TX_READY)
/* Pickup priority of thread. */
priority = thread_ptr -> tx_thread_priority;
#ifdef TX_THREAD_ENABLE_PERFORMANCE_INFO
/* Increment the total number of thread resumptions. */
_tx_thread_performance_resume_count++;
/* Increment this thread's resume count. */
thread_ptr -> tx_thread_performance_resume_count++;
#endif
/* Determine if there are other threads at this priority that are
ready. */
head_ptr = _tx_thread_priority_list[priority];
if (head_ptr == TX_NULL)
{
/* First thread at this priority ready. Add to the front of the list. */
_tx_thread_priority_list[priority] = thread_ptr;
thread_ptr -> tx_thread_ready_next = thread_ptr;
thread_ptr -> tx_thread_ready_previous = thread_ptr;
#if TX_MAX_PRIORITIES > 32
/* Calculate the index into the bit map array. */
map_index = priority/((UINT) 32);
/* Set the active bit to remember that the priority map has something set. */
TX_DIV32_BIT_SET(priority, priority_bit)
_tx_thread_priority_map_active = _tx_thread_priority_map_active | priority_bit;
#endif
/* Or in the thread's priority bit. */
TX_MOD32_BIT_SET(priority, priority_bit)
_tx_thread_priority_maps[MAP_INDEX] = _tx_thread_priority_maps[MAP_INDEX] | priority_bit;
/* Determine if this newly ready thread is the highest priority. */
if (priority < _tx_thread_highest_priority)
{
/* A new highest priority thread is present. */
/* Update the highest priority variable. */
_tx_thread_highest_priority = priority;
/* Pickup the execute pointer. Since it is going to be referenced multiple
times, it is placed in a local variable. */
execute_ptr = _tx_thread_execute_ptr;
/* Determine if no thread is currently executing. */
if (execute_ptr == TX_NULL)
{
/* Simply setup the execute pointer. */
_tx_thread_execute_ptr = thread_ptr;
}
else
{
/* Check to see if this is a higher priority thread and determine if preemption is allowed. */
if (priority < execute_ptr -> tx_thread_preempt_threshold)
{
#ifndef TX_DISABLE_PREEMPTION_THRESHOLD
/* Determine if the preempted thread had preemption-threshold set. */
if (execute_ptr -> tx_thread_preempt_threshold != execute_ptr -> tx_thread_priority)
{
#if TX_MAX_PRIORITIES > 32
/* Calculate the index into the bit map array. */
map_index = (execute_ptr -> tx_thread_priority)/((UINT) 32);
/* Set the active bit to remember that the preempt map has something set. */
TX_DIV32_BIT_SET(execute_ptr -> tx_thread_priority, priority_bit)
_tx_thread_preempted_map_active = _tx_thread_preempted_map_active | priority_bit;
#endif
/* Remember that this thread was preempted by a thread above the thread's threshold. */
TX_MOD32_BIT_SET(execute_ptr -> tx_thread_priority, priority_bit)
_tx_thread_preempted_maps[MAP_INDEX] = _tx_thread_preempted_maps[MAP_INDEX] | priority_bit;
}
#endif
#ifdef TX_THREAD_ENABLE_PERFORMANCE_INFO
/* Determine if the caller is an interrupt or from a thread. */
if (TX_THREAD_GET_SYSTEM_STATE() == ((ULONG) 0))
{
/* Caller is a thread, so this is a solicited preemption. */
_tx_thread_performance_solicited_preemption_count++;
/* Increment the thread's solicited preemption counter. */
execute_ptr -> tx_thread_performance_solicited_preemption_count++;
}
else
{
if (TX_THREAD_GET_SYSTEM_STATE() < TX_INITIALIZE_IN_PROGRESS)
{
/* Caller is an interrupt, so this is an interrupt preemption. */
_tx_thread_performance_interrupt_preemption_count++;
/* Increment the thread's interrupt preemption counter. */
execute_ptr -> tx_thread_performance_interrupt_preemption_count++;
}
}
/* Remember the thread that preempted this thread. */
execute_ptr -> tx_thread_performance_last_preempting_thread = thread_ptr;
#endif
/* Yes, modify the execute thread pointer. */
_tx_thread_execute_ptr = thread_ptr;
#ifndef TX_MISRA_ENABLE
/* If MISRA is not-enabled, insert a preemption and return in-line for performance. */
#ifdef TX_THREAD_ENABLE_PERFORMANCE_INFO
/* Is the execute pointer different? */
if (_tx_thread_performance_execute_log[_tx_thread_performance__execute_log_index] != _tx_thread_execute_ptr)
{
/* Move to next entry. */
_tx_thread_performance__execute_log_index++;
/* Check for wrap condition. */
if (_tx_thread_performance__execute_log_index >= TX_THREAD_EXECUTE_LOG_SIZE)
{
/* Set the index to the beginning. */
_tx_thread_performance__execute_log_index = ((UINT) 0);
}
/* Log the new execute pointer. */
_tx_thread_performance_execute_log[_tx_thread_performance__execute_log_index] = _tx_thread_execute_ptr;
}
#endif
#ifdef TX_ENABLE_EVENT_TRACE
/* Check that the event time stamp is unchanged. A different
timestamp means that a later event wrote over the thread
resume event. In that case, do nothing here. */
if (entry_ptr != TX_NULL)
{
/* Is the timestamp the same? */
if (time_stamp == entry_ptr -> tx_trace_buffer_entry_time_stamp)
{
/* Timestamp is the same, set the "next thread pointer" to NULL. This can
be used by the trace analysis tool to show idle system conditions. */
entry_ptr -> tx_trace_buffer_entry_information_field_4 = TX_POINTER_TO_ULONG_CONVERT(_tx_thread_execute_ptr);
}
}
#endif
#ifdef TX_ENABLE_STACK_CHECKING
/* Pickup the next execute pointer. */
thread_ptr = _tx_thread_execute_ptr;
/* Check this thread's stack. */
TX_THREAD_STACK_CHECK(thread_ptr)
#endif
/* Now determine if preemption should take place. This is only possible if the current thread pointer is
not the same as the execute thread pointer AND the system state and preempt disable flags are clear. */
TX_THREAD_SYSTEM_RETURN_CHECK(combined_flags)
if (combined_flags == ((ULONG) 0))
{
#ifdef TX_THREAD_ENABLE_PERFORMANCE_INFO
/* There is another thread ready to run and will be scheduled upon return. */
_tx_thread_performance_non_idle_return_count++;
#endif
/* Preemption is needed - return to the system! */
_tx_thread_system_return();
}
/* Return in-line when MISRA is not enabled. */
return;
#endif
}
}
}
}
else
{
/* No, there are other threads at this priority already ready. */
/* Just add this thread to the priority list. */
tail_ptr = head_ptr -> tx_thread_ready_previous;
tail_ptr -> tx_thread_ready_next = thread_ptr;
head_ptr -> tx_thread_ready_previous = thread_ptr;
thread_ptr -> tx_thread_ready_previous = tail_ptr;
thread_ptr -> tx_thread_ready_next = head_ptr;
}
}
/* Else, delayed suspend flag was set. */
else
{
/* Clear the delayed suspend flag and change the state. */
thread_ptr -> tx_thread_delayed_suspend = TX_FALSE;
thread_ptr -> tx_thread_state = TX_SUSPENDED;
}
}
#ifdef TX_THREAD_ENABLE_PERFORMANCE_INFO
/* Is the execute pointer different? */
if (_tx_thread_performance_execute_log[_tx_thread_performance__execute_log_index] != _tx_thread_execute_ptr)
{
/* Move to next entry. */
_tx_thread_performance__execute_log_index++;
/* Check for wrap condition. */
if (_tx_thread_performance__execute_log_index >= TX_THREAD_EXECUTE_LOG_SIZE)
{
/* Set the index to the beginning. */
_tx_thread_performance__execute_log_index = ((UINT) 0);
}
/* Log the new execute pointer. */
_tx_thread_performance_execute_log[_tx_thread_performance__execute_log_index] = _tx_thread_execute_ptr;
}
#endif
#ifdef TX_ENABLE_EVENT_TRACE
/* Check that the event time stamp is unchanged. A different
timestamp means that a later event wrote over the thread
resume event. In that case, do nothing here. */
if (entry_ptr != TX_NULL)
{
/* Does the timestamp match? */
if (time_stamp == entry_ptr -> tx_trace_buffer_entry_time_stamp)
{
/* Timestamp is the same, set the "next thread pointer" to NULL. This can
be used by the trace analysis tool to show idle system conditions. */
#ifdef TX_MISRA_ENABLE
entry_ptr -> tx_trace_buffer_entry_info_4 = TX_POINTER_TO_ULONG_CONVERT(_tx_thread_execute_ptr);
#else
entry_ptr -> tx_trace_buffer_entry_information_field_4 = TX_POINTER_TO_ULONG_CONVERT(_tx_thread_execute_ptr);
#endif
}
}
#endif
/* Pickup thread pointer. */
TX_THREAD_GET_CURRENT(current_thread)
/* Determine if a preemption condition is present. */
if (current_thread != _tx_thread_execute_ptr)
{
#ifdef TX_ENABLE_STACK_CHECKING
/* Pickup the next execute pointer. */
thread_ptr = _tx_thread_execute_ptr;
/* Check this thread's stack. */
TX_THREAD_STACK_CHECK(thread_ptr)
#endif
/* Now determine if preemption should take place. This is only possible if the current thread pointer is
not the same as the execute thread pointer AND the system state and preempt disable flags are clear. */
TX_THREAD_SYSTEM_RETURN_CHECK(combined_flags)
if (combined_flags == ((ULONG) 0))
{
#ifdef TX_THREAD_ENABLE_PERFORMANCE_INFO
/* There is another thread ready to run and will be scheduled upon return. */
_tx_thread_performance_non_idle_return_count++;
#endif
/* Preemption is needed - return to the system! */
_tx_thread_system_return();
}
}
}
#endif