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fix(freertos-smp): Miscellaneous fixes for granular locks

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This commit is contained in:
Sudeep Mohanty 2025-08-15 17:03:39 +02:00
parent e3d92dd5fd
commit 35025858cf
7 changed files with 302 additions and 359 deletions
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78
event_groups.c
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@ -87,24 +87,6 @@
#define event_groupsEXIT_CRITICAL_FROM_ISR( uxSavedInterruptStatus, pxEventBits ) taskEXIT_CRITICAL_FROM_ISR( uxSavedInterruptStatus );
#endif /* #if ( portUSING_GRANULAR_LOCKS == 1 ) */
/*
* Locks an event group for tasks. Prevents other tasks from accessing the event group but allows
* ISRs to pend access to the event group. Caller cannot be preempted by other tasks
* after locking the event group, thus allowing the caller to execute non-deterministic
* operations.
*/
#if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) )
static void prvLockEventGroupForTasks( EventGroup_t * pxEventBits ) PRIVILEGED_FUNCTION;
#endif /* #if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) ) */
/*
* Unlocks an event group for tasks. Handles all pended access from ISRs, then reenables
* preemption for the caller.
*/
#if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) )
static BaseType_t prvUnlockEventGroupForTasks( EventGroup_t * pxEventBits ) PRIVILEGED_FUNCTION;
#endif /* #if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) ) */
/*
* Test the bits set in uxCurrentEventBits to see if the wait condition is met.
* The wait condition is defined by xWaitForAllBits. If xWaitForAllBits is
@ -129,8 +111,22 @@
* When the task unlocks the event group, all pended access attempts are handled.
*/
#if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) )
#define event_groupsLOCK( pxEventBits ) prvLockEventGroupForTasks( pxEventBits )
#define event_groupsUNLOCK( pxEventBits ) prvUnlockEventGroupForTasks( pxEventBits );
#define event_groupsLOCK( pxEventBits ) taskDATA_GROUP_LOCK( &( ( pxEventBits )->xTaskSpinlock ) )
#define event_groupsUNLOCK( pxEventBits ) \
( { \
taskDATA_GROUP_UNLOCK( &( ( pxEventBits )->xTaskSpinlock ) ); \
BaseType_t xAlreadyYielded; \
if( xTaskUnlockCanYield() == pdTRUE ) \
{ \
taskYIELD_WITHIN_API(); \
xAlreadyYielded = pdTRUE; \
} \
else \
{ \
xAlreadyYielded = pdFALSE; \
} \
xAlreadyYielded; \
} )
#else /* #if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) ) */
#define event_groupsLOCK( pxEventBits ) vTaskSuspendAll()
#define event_groupsUNLOCK( pxEventBits ) xTaskResumeAll()
@ -867,48 +863,6 @@
traceRETURN_vEventGroupClearBitsCallback();
}
/*-----------------------------------------------------------*/
#if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) )
static void prvLockEventGroupForTasks( EventGroup_t * pxEventBits )
{
/* Disable preemption so that the current task cannot be preempted by another task */
vTaskPreemptionDisable( NULL );
/* Keep holding xTaskSpinlock to prevent tasks on other cores from accessing
* the event group while it is suspended. */
portGET_SPINLOCK( portGET_CORE_ID(), &( pxEventBits->xTaskSpinlock ) );
}
#endif /* #if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) ) */
/*-----------------------------------------------------------*/
#if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) )
static BaseType_t prvUnlockEventGroupForTasks( EventGroup_t * pxEventBits )
{
BaseType_t xReturn = pdFALSE;
/* Release the previously held task spinlock */
portRELEASE_SPINLOCK( portGET_CORE_ID(), &( pxEventBits->xTaskSpinlock ) );
/* Re-enable preemption */
vTaskPreemptionEnable( NULL );
/* Yield if preemption was re-enabled*/
if( xTaskUnlockCanYield() == pdTRUE )
{
taskYIELD_WITHIN_API();
/* Return true as the task was preempted */
xReturn = pdTRUE;
}
else
{
/* Return false as the task was not preempted */
xReturn = pdFALSE;
}
return xReturn;
}
#endif /* #if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) ) */
/*-----------------------------------------------------------*/
static BaseType_t prvTestWaitCondition( const EventBits_t uxCurrentEventBits,
const EventBits_t uxBitsToWaitFor,