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Create macro versions of uxListRemove() and vListInsertEnd() for use in xTaskIncrementTick(). This provides a minor optimisation to remove the need for a few function calls. (#241)
Co-authored-by: alfred gedeon <28123637+alfred2g@users.noreply.github.com> Co-authored-by: Aniruddha Kanhere <60444055+AniruddhaKanhere@users.noreply.github.com>
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RichardBarry
GitHub
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commit
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@ -289,6 +289,86 @@ typedef struct xLIST
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( pxTCB ) = ( pxConstList )->pxIndex->pvOwner; \
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}
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/*
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* Version of uxListRemove() that does not return a value. Provided as a slight
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* optimisation for xTaskIncrementTick() by being inline.
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*
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* Remove an item from a list. The list item has a pointer to the list that
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* it is in, so only the list item need be passed into the function.
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*
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* @param uxListRemove The item to be removed. The item will remove itself from
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* the list pointed to by it's pxContainer parameter.
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*
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* @return The number of items that remain in the list after the list item has
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* been removed.
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*
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* \page listREMOVE_ITEM listREMOVE_ITEM
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* \ingroup LinkedList
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*/
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#define listREMOVE_ITEM( pxItemToRemove ) \
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{ \
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/* The list item knows which list it is in. Obtain the list from the list \
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* item. */ \
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List_t * const pxList = ( pxItemToRemove )->pxContainer; \
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\
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( pxItemToRemove )->pxNext->pxPrevious = ( pxItemToRemove )->pxPrevious; \
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( pxItemToRemove )->pxPrevious->pxNext = ( pxItemToRemove )->pxNext; \
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/* Make sure the index is left pointing to a valid item. */ \
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if( pxList->pxIndex == ( pxItemToRemove ) ) \
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{ \
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pxList->pxIndex = ( pxItemToRemove )->pxPrevious; \
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} \
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\
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( pxItemToRemove )->pxContainer = NULL; \
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( pxList->uxNumberOfItems )--; \
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}
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/*
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* Inline version of vListInsertEnd() to provide slight optimisation for
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* xTaskIncrementTick().
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*
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* Insert a list item into a list. The item will be inserted in a position
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* such that it will be the last item within the list returned by multiple
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* calls to listGET_OWNER_OF_NEXT_ENTRY.
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*
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* The list member pxIndex is used to walk through a list. Calling
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* listGET_OWNER_OF_NEXT_ENTRY increments pxIndex to the next item in the list.
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* Placing an item in a list using vListInsertEnd effectively places the item
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* in the list position pointed to by pxIndex. This means that every other
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* item within the list will be returned by listGET_OWNER_OF_NEXT_ENTRY before
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* the pxIndex parameter again points to the item being inserted.
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*
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* @param pxList The list into which the item is to be inserted.
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*
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* @param pxNewListItem The list item to be inserted into the list.
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*
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* \page listINSERT_END listINSERT_END
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* \ingroup LinkedList
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*/
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#define listINSERT_END( pxList, pxNewListItem ) \
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{ \
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ListItem_t * const pxIndex = ( pxList )->pxIndex; \
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\
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/* Only effective when configASSERT() is also defined, these tests may catch \
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* the list data structures being overwritten in memory. They will not catch \
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* data errors caused by incorrect configuration or use of FreeRTOS. */ \
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listTEST_LIST_INTEGRITY( ( pxList ) ); \
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listTEST_LIST_ITEM_INTEGRITY( ( pxNewListItem ) ); \
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\
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/* Insert a new list item into ( pxList ), but rather than sort the list, \
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* makes the new list item the last item to be removed by a call to \
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* listGET_OWNER_OF_NEXT_ENTRY(). */ \
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( pxNewListItem )->pxNext = pxIndex; \
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( pxNewListItem )->pxPrevious = pxIndex->pxPrevious; \
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\
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pxIndex->pxPrevious->pxNext = ( pxNewListItem ); \
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pxIndex->pxPrevious = ( pxNewListItem ); \
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\
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/* Remember which list the item is in. */ \
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( pxNewListItem )->pxContainer = ( pxList ); \
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\
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( ( pxList )->uxNumberOfItems )++; \
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}
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/*
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* Access function to obtain the owner of the first entry in a list. Lists
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37
tasks.c
37
tasks.c
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@ -219,7 +219,7 @@
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#define prvAddTaskToReadyList( pxTCB ) \
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traceMOVED_TASK_TO_READY_STATE( pxTCB ); \
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taskRECORD_READY_PRIORITY( ( pxTCB )->uxPriority ); \
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vListInsertEnd( &( pxReadyTasksLists[ ( pxTCB )->uxPriority ] ), &( ( pxTCB )->xStateListItem ) ); \
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listINSERT_END( &( pxReadyTasksLists[ ( pxTCB )->uxPriority ] ), &( ( pxTCB )->xStateListItem ) ); \
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tracePOST_MOVED_TASK_TO_READY_STATE( pxTCB )
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/*-----------------------------------------------------------*/
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@ -2233,8 +2233,9 @@ BaseType_t xTaskResumeAll( void )
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while( listLIST_IS_EMPTY( &xPendingReadyList ) == pdFALSE )
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{
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pxTCB = listGET_OWNER_OF_HEAD_ENTRY( ( &xPendingReadyList ) ); /*lint !e9079 void * is used as this macro is used with timers and co-routines too. Alignment is known to be fine as the type of the pointer stored and retrieved is the same. */
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( void ) uxListRemove( &( pxTCB->xEventListItem ) );
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( void ) uxListRemove( &( pxTCB->xStateListItem ) );
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listREMOVE_ITEM( &( pxTCB->xEventListItem ) );
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portMEMORY_BARRIER();
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listREMOVE_ITEM( &( pxTCB->xStateListItem ) );
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prvAddTaskToReadyList( pxTCB );
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/* If the moved task has a priority higher than or equal to
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@ -2794,13 +2795,13 @@ BaseType_t xTaskIncrementTick( void )
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}
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/* It is time to remove the item from the Blocked state. */
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( void ) uxListRemove( &( pxTCB->xStateListItem ) );
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listREMOVE_ITEM( &( pxTCB->xStateListItem ) );
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/* Is the task waiting on an event also? If so remove
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* it from the event list. */
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if( listLIST_ITEM_CONTAINER( &( pxTCB->xEventListItem ) ) != NULL )
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{
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( void ) uxListRemove( &( pxTCB->xEventListItem ) );
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listREMOVE_ITEM( &( pxTCB->xEventListItem ) );
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}
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else
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{
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@ -3127,7 +3128,7 @@ void vTaskPlaceOnUnorderedEventList( List_t * pxEventList,
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* event group implementation - and interrupts don't access event groups
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* directly (instead they access them indirectly by pending function calls to
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* the task level). */
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vListInsertEnd( pxEventList, &( pxCurrentTCB->xEventListItem ) );
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listINSERT_END( pxEventList, &( pxCurrentTCB->xEventListItem ) );
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prvAddCurrentTaskToDelayedList( xTicksToWait, pdTRUE );
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}
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@ -3151,7 +3152,7 @@ void vTaskPlaceOnUnorderedEventList( List_t * pxEventList,
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* In this case it is assume that this is the only task that is going to
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* be waiting on this event list, so the faster vListInsertEnd() function
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* can be used in place of vListInsert. */
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vListInsertEnd( pxEventList, &( pxCurrentTCB->xEventListItem ) );
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listINSERT_END( pxEventList, &( pxCurrentTCB->xEventListItem ) );
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/* If the task should block indefinitely then set the block time to a
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* value that will be recognised as an indefinite delay inside the
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@ -3188,11 +3189,11 @@ BaseType_t xTaskRemoveFromEventList( const List_t * const pxEventList )
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* pxEventList is not empty. */
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pxUnblockedTCB = listGET_OWNER_OF_HEAD_ENTRY( pxEventList ); /*lint !e9079 void * is used as this macro is used with timers and co-routines too. Alignment is known to be fine as the type of the pointer stored and retrieved is the same. */
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configASSERT( pxUnblockedTCB );
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( void ) uxListRemove( &( pxUnblockedTCB->xEventListItem ) );
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listREMOVE_ITEM( &( pxUnblockedTCB->xEventListItem ) );
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if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
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{
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( void ) uxListRemove( &( pxUnblockedTCB->xStateListItem ) );
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listREMOVE_ITEM( &( pxUnblockedTCB->xStateListItem ) );
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prvAddTaskToReadyList( pxUnblockedTCB );
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#if ( configUSE_TICKLESS_IDLE != 0 )
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@ -3213,7 +3214,7 @@ BaseType_t xTaskRemoveFromEventList( const List_t * const pxEventList )
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{
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/* The delayed and ready lists cannot be accessed, so hold this task
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* pending until the scheduler is resumed. */
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vListInsertEnd( &( xPendingReadyList ), &( pxUnblockedTCB->xEventListItem ) );
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listINSERT_END( &( xPendingReadyList ), &( pxUnblockedTCB->xEventListItem ) );
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}
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if( pxUnblockedTCB->uxPriority > pxCurrentTCB->uxPriority )
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@ -3252,7 +3253,7 @@ void vTaskRemoveFromUnorderedEventList( ListItem_t * pxEventListItem,
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* event flags. */
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pxUnblockedTCB = listGET_LIST_ITEM_OWNER( pxEventListItem ); /*lint !e9079 void * is used as this macro is used with timers and co-routines too. Alignment is known to be fine as the type of the pointer stored and retrieved is the same. */
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configASSERT( pxUnblockedTCB );
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( void ) uxListRemove( pxEventListItem );
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listREMOVE_ITEM( pxEventListItem );
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#if ( configUSE_TICKLESS_IDLE != 0 )
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{
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@ -3271,7 +3272,7 @@ void vTaskRemoveFromUnorderedEventList( ListItem_t * pxEventListItem,
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/* Remove the task from the delayed list and add it to the ready list. The
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* scheduler is suspended so interrupts will not be accessing the ready
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* lists. */
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( void ) uxListRemove( &( pxUnblockedTCB->xStateListItem ) );
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listREMOVE_ITEM( &( pxUnblockedTCB->xStateListItem ) );
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prvAddTaskToReadyList( pxUnblockedTCB );
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if( pxUnblockedTCB->uxPriority > pxCurrentTCB->uxPriority )
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@ -4922,7 +4923,7 @@ TickType_t uxTaskResetEventItemValue( void )
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* notification then unblock it now. */
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if( ucOriginalNotifyState == taskWAITING_NOTIFICATION )
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{
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( void ) uxListRemove( &( pxTCB->xStateListItem ) );
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listREMOVE_ITEM( &( pxTCB->xStateListItem ) );
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prvAddTaskToReadyList( pxTCB );
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/* The task should not have been on an event list. */
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@ -5069,14 +5070,14 @@ TickType_t uxTaskResetEventItemValue( void )
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if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
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{
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( void ) uxListRemove( &( pxTCB->xStateListItem ) );
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listREMOVE_ITEM( &( pxTCB->xStateListItem ) );
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prvAddTaskToReadyList( pxTCB );
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}
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else
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{
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/* The delayed and ready lists cannot be accessed, so hold
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* this task pending until the scheduler is resumed. */
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vListInsertEnd( &( xPendingReadyList ), &( pxTCB->xEventListItem ) );
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listINSERT_END( &( xPendingReadyList ), &( pxTCB->xEventListItem ) );
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}
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if( pxTCB->uxPriority > pxCurrentTCB->uxPriority )
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@ -5160,14 +5161,14 @@ TickType_t uxTaskResetEventItemValue( void )
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if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
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{
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( void ) uxListRemove( &( pxTCB->xStateListItem ) );
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listREMOVE_ITEM( &( pxTCB->xStateListItem ) );
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prvAddTaskToReadyList( pxTCB );
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}
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else
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{
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/* The delayed and ready lists cannot be accessed, so hold
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* this task pending until the scheduler is resumed. */
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vListInsertEnd( &( xPendingReadyList ), &( pxTCB->xEventListItem ) );
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listINSERT_END( &( xPendingReadyList ), &( pxTCB->xEventListItem ) );
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}
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if( pxTCB->uxPriority > pxCurrentTCB->uxPriority )
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@ -5303,7 +5304,7 @@ static void prvAddCurrentTaskToDelayedList( TickType_t xTicksToWait,
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/* Add the task to the suspended task list instead of a delayed task
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* list to ensure it is not woken by a timing event. It will block
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* indefinitely. */
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vListInsertEnd( &xSuspendedTaskList, &( pxCurrentTCB->xStateListItem ) );
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listINSERT_END( &xSuspendedTaskList, &( pxCurrentTCB->xStateListItem ) );
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}
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else
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{
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