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Reset xNextTaskUnblockTime in task notify FromISR APIs

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If a task is blocked waiting for a notification then
xNextTaskUnblockTime might be set to the blocked task's timeout time. If
the task is unblocked for a reason other than a timeout
xNextTaskUnblockTime is normally left unchanged, because it will
automatically get reset to a new value when the tick count equals
xNextTaskUnblockTime. However if tickless idle is used it is important
to enter sleep mode at the earliest possible time - so reset
xNextTaskUnblockTime here to ensure it is updated at the earliest
possible time.

This was reported here -
https://forums.freertos.org/t/the-vtaskgenericnotifygivefromisr-function-need-call-prvresetnexttaskunblocktime/21090

Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>
This commit is contained in:
Gaurav Aggarwal 2024-08-05 14:57:48 +05:30
parent fffed5e809
commit b8471ba566
1 changed files with 32 additions and 0 deletions
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32
tasks.c
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@ -8059,6 +8059,22 @@ TickType_t uxTaskResetEventItemValue( void )
{ {
listREMOVE_ITEM( &( pxTCB->xStateListItem ) ); listREMOVE_ITEM( &( pxTCB->xStateListItem ) );
prvAddTaskToReadyList( pxTCB ); prvAddTaskToReadyList( pxTCB );
#if ( configUSE_TICKLESS_IDLE != 0 )
{
/* If a task is blocked waiting for a notification then
* xNextTaskUnblockTime might be set to the blocked task's time
* out time. If the task is unblocked for a reason other than
* a timeout xNextTaskUnblockTime is normally left unchanged,
* because it will automatically get reset to a new value when
* the tick count equals xNextTaskUnblockTime. However if
* tickless idling is used it might be more important to enter
* sleep mode at the earliest possible time - so reset
* xNextTaskUnblockTime here to ensure it is updated at the
* earliest possible time. */
prvResetNextTaskUnblockTime();
}
#endif
} }
else else
{ {
@ -8177,6 +8193,22 @@ TickType_t uxTaskResetEventItemValue( void )
{ {
listREMOVE_ITEM( &( pxTCB->xStateListItem ) ); listREMOVE_ITEM( &( pxTCB->xStateListItem ) );
prvAddTaskToReadyList( pxTCB ); prvAddTaskToReadyList( pxTCB );
#if ( configUSE_TICKLESS_IDLE != 0 )
{
/* If a task is blocked waiting for a notification then
* xNextTaskUnblockTime might be set to the blocked task's time
* out time. If the task is unblocked for a reason other than
* a timeout xNextTaskUnblockTime is normally left unchanged,
* because it will automatically get reset to a new value when
* the tick count equals xNextTaskUnblockTime. However if
* tickless idling is used it might be more important to enter
* sleep mode at the earliest possible time - so reset
* xNextTaskUnblockTime here to ensure it is updated at the
* earliest possible time. */
prvResetNextTaskUnblockTime();
}
#endif
} }
else else
{ {