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Add some tick interrupt overflow protection to the timers module. This is not tested yet and still a work in progress.

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This commit is contained in:
Richard Barry 2011-02-10 19:09:35 +00:00
parent 671ca2724e
commit 7ee534e4c2
5 changed files with 124 additions and 27 deletions
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41
Source/tasks.c
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@ -1448,6 +1448,15 @@ void vTaskIncrementTick( void )
pxDelayedTaskList = pxOverflowDelayedTaskList;
pxOverflowDelayedTaskList = pxTemp;
xNumOfOverflows++;
#if configUSE_TIMERS == 1
{
/* The timer service task needs to know to switch its lists
too. */
xTimerGenericCommand( NULL, trmCOMMAND_PROCESS_TIMER_OVERFLOW, 0, 0 );
}
#endif
if( listLIST_IS_EMPTY( pxDelayedTaskList ) != pdFALSE )
{
/* The delayed list is empty. Set xNextTaskUnblockTime to the
@ -1741,6 +1750,38 @@ portTickType xTimeToWake;
}
/*-----------------------------------------------------------*/
#if configUSE_TIMERS == 1
void vTaskPlaceOnEventListRestricted( const xList * const pxEventList, portTickType xTicksToWait )
{
portTickType xTimeToWake;
/* This function should not be called by application code hence the
'Restricted' in its name. It is not part of the public API. It is
designed for use by kernel code, and has special calling requirements -
it should be called from a critical section. */
/* Place the event list item of the TCB in the appropriate event list.
In this case it is assume that this is the only task that is going to
be waiting on this event list, so the faster vListInsertEnd() function
can be used in place of vListInsert. */
vListInsertEnd( ( xList * ) pxEventList, ( xListItem * ) &( pxCurrentTCB->xEventListItem ) );
/* We must remove this task from the ready list before adding it to the
blocked list as the same list item is used for both lists. This
function is called form a critical section. */
vListRemove( ( xListItem * ) &( pxCurrentTCB->xGenericListItem ) );
/* Calculate the time at which the task should be woken if the event does
not occur. This may overflow but this doesn't matter. */
xTimeToWake = xTickCount + xTicksToWait;
prvAddCurrentTaskToDelayedList( xTimeToWake );
}
#endif /* configUSE_TIMERS */
/*-----------------------------------------------------------*/
signed portBASE_TYPE xTaskRemoveFromEventList( const xList * const pxEventList )
{
tskTCB *pxUnblockedTCB;