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Update equal priority task preemption #603

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Merged
merged 3 commits into from
Jan 6, 2023
+6 −6
Merged

Update equal priority task preemption #603

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b6918ef
Update equal priority task preemption
chinglee-iot Dec 21, 2022
c228d4c
Update vTaskResumeAll not to preempt task with equal priority
chinglee-iot Dec 21, 2022
e512aab
Fix in xTaskResumeFromISR
chinglee-iot Dec 21, 2022
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12 changes: 6 additions & 6 deletions tasks.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1552,7 +1552,7 @@ static void prvAddNewTaskToReadyList( TCB_t * pxNewTCB )
/* The priority of a task other than the currently
* running task is being raised. Is the priority being
* raised above that of the running task? */
if( uxNewPriority >= pxCurrentTCB->uxPriority )
if( uxNewPriority > pxCurrentTCB->uxPriority )
{
xYieldRequired = pdTRUE;
}
Expand Down Expand Up @@ -1845,7 +1845,7 @@ static void prvAddNewTaskToReadyList( TCB_t * pxNewTCB )
prvAddTaskToReadyList( pxTCB );

/* A higher priority task may have just been resumed. */
if( pxTCB->uxPriority >= pxCurrentTCB->uxPriority )
if( pxTCB->uxPriority > pxCurrentTCB->uxPriority )
{
/* This yield may not cause the task just resumed to run,
* but will leave the lists in the correct state for the
Expand Down Expand Up @@ -1913,7 +1913,7 @@ static void prvAddNewTaskToReadyList( TCB_t * pxNewTCB )
{
/* Ready lists can be accessed so move the task from the
* suspended list to the ready list directly. */
if( pxTCB->uxPriority >= pxCurrentTCB->uxPriority )
if( pxTCB->uxPriority > pxCurrentTCB->uxPriority )
{
xYieldRequired = pdTRUE;

Expand Down Expand Up @@ -2203,9 +2203,9 @@ BaseType_t xTaskResumeAll( void )
listREMOVE_ITEM( &( pxTCB->xStateListItem ) );
prvAddTaskToReadyList( pxTCB );

/* If the moved task has a priority higher than or equal to
* the current task then a yield must be performed. */
if( pxTCB->uxPriority >= pxCurrentTCB->uxPriority )
/* If the moved task has a priority higher than the current
* task then a yield must be performed. */
if( pxTCB->uxPriority > pxCurrentTCB->uxPriority )
{
xYieldPending = pdTRUE;
}
Expand Down