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Updates vCoRoutineSchedule() so it returns without doing anything if if the co-routine internal data structures have not been initialised. The internal data structures are initialised when the first co-routine is created.

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NOTE: Co-routines are a deprecated feature.  This change was made to close off an old ticket as the source control transitions from SourceForge to Github.
This commit is contained in:
ribarry 2020-02-22 17:48:22 -08:00 committed by Yuhui.Zheng
parent 326d88f429
commit 078b400aff
1 changed files with 27 additions and 21 deletions
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48
croutine.c
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@ -45,8 +45,8 @@
static List_t pxReadyCoRoutineLists[ configMAX_CO_ROUTINE_PRIORITIES ]; /*< Prioritised ready co-routines. */ static List_t pxReadyCoRoutineLists[ configMAX_CO_ROUTINE_PRIORITIES ]; /*< Prioritised ready co-routines. */
static List_t xDelayedCoRoutineList1; /*< Delayed co-routines. */ static List_t xDelayedCoRoutineList1; /*< Delayed co-routines. */
static List_t xDelayedCoRoutineList2; /*< Delayed co-routines (two lists are used - one for delays that have overflowed the current tick count. */ static List_t xDelayedCoRoutineList2; /*< Delayed co-routines (two lists are used - one for delays that have overflowed the current tick count. */
static List_t * pxDelayedCoRoutineList; /*< Points to the delayed co-routine list currently being used. */ static List_t * pxDelayedCoRoutineList = NULL; /*< Points to the delayed co-routine list currently being used. */
static List_t * pxOverflowDelayedCoRoutineList; /*< Points to the delayed co-routine list currently being used to hold co-routines that have overflowed the current tick count. */ static List_t * pxOverflowDelayedCoRoutineList = NULL; /*< Points to the delayed co-routine list currently being used to hold co-routines that have overflowed the current tick count. */
static List_t xPendingReadyCoRoutineList; /*< Holds co-routines that have been readied by an external event. They cannot be added directly to the ready lists as the ready lists cannot be accessed by interrupts. */ static List_t xPendingReadyCoRoutineList; /*< Holds co-routines that have been readied by an external event. They cannot be added directly to the ready lists as the ready lists cannot be accessed by interrupts. */
/* Other file private variables. --------------------------------*/ /* Other file private variables. --------------------------------*/
@ -277,30 +277,36 @@ CRCB_t *pxCRCB;
void vCoRoutineSchedule( void ) void vCoRoutineSchedule( void )
{ {
/* See if any co-routines readied by events need moving to the ready lists. */ /* Only run a co-routine after prvInitialiseCoRoutineLists() has been
prvCheckPendingReadyList(); called. prvInitialiseCoRoutineLists() is called automatically when a
co-routine is created. */
/* See if any delayed co-routines have timed out. */ if( pxDelayedCoRoutineList != NULL )
prvCheckDelayedList();
/* Find the highest priority queue that contains ready co-routines. */
while( listLIST_IS_EMPTY( &( pxReadyCoRoutineLists[ uxTopCoRoutineReadyPriority ] ) ) )
{ {
if( uxTopCoRoutineReadyPriority == 0 ) /* See if any co-routines readied by events need moving to the ready lists. */
prvCheckPendingReadyList();
/* See if any delayed co-routines have timed out. */
prvCheckDelayedList();
/* Find the highest priority queue that contains ready co-routines. */
while( listLIST_IS_EMPTY( &( pxReadyCoRoutineLists[ uxTopCoRoutineReadyPriority ] ) ) )
{ {
/* No more co-routines to check. */ if( uxTopCoRoutineReadyPriority == 0 )
return; {
/* No more co-routines to check. */
return;
}
--uxTopCoRoutineReadyPriority;
} }
--uxTopCoRoutineReadyPriority;
/* listGET_OWNER_OF_NEXT_ENTRY walks through the list, so the co-routines
of the same priority get an equal share of the processor time. */
listGET_OWNER_OF_NEXT_ENTRY( pxCurrentCoRoutine, &( pxReadyCoRoutineLists[ uxTopCoRoutineReadyPriority ] ) );
/* Call the co-routine. */
( pxCurrentCoRoutine->pxCoRoutineFunction )( pxCurrentCoRoutine, pxCurrentCoRoutine->uxIndex );
} }
/* listGET_OWNER_OF_NEXT_ENTRY walks through the list, so the co-routines
of the same priority get an equal share of the processor time. */
listGET_OWNER_OF_NEXT_ENTRY( pxCurrentCoRoutine, &( pxReadyCoRoutineLists[ uxTopCoRoutineReadyPriority ] ) );
/* Call the co-routine. */
( pxCurrentCoRoutine->pxCoRoutineFunction )( pxCurrentCoRoutine, pxCurrentCoRoutine->uxIndex );
return; return;
} }
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/