/*---------------------------------------------------------------------
* Generate delayed event to the application.
* Deactivate fired timer.
*-------------------------------------------------------------------*/
static void
timer_fire(
ETimer_t * const t
)
{
t->expiration = ( t->recurrence == 0 ) ? 0 : t->expiration + t->recurrence;
Escher_SendEvent( t->event );
if ( 0 != t->recurrence ) {
Escher_xtUMLEvent_t * e = Escher_AllocatextUMLEvent();
Escher_memmove( e, t->event, sizeof( Escher_xtUMLEvent_t ) );
t->event = e;
#ifdef ESCHER_TASKING_POSIX
Escher_mutex_lock( SEMAPHORE_FLAVOR_TIMER );
#endif
animate = animate->next; /* Remove from front of list. */
timer_insert_sorted( t );
#ifdef ESCHER_TASKING_POSIX
Escher_mutex_unlock( SEMAPHORE_FLAVOR_TIMER );
#endif
} else {
#ifdef ESCHER_TASKING_POSIX
Escher_mutex_lock( SEMAPHORE_FLAVOR_TIMER );
#endif
animate = animate->next; /* Remove from active list. */
t->next = inanimate; /* Connect to inactive list. */
inanimate = t;
#ifdef ESCHER_TASKING_POSIX
Escher_mutex_unlock( SEMAPHORE_FLAVOR_TIMER );
#endif
}
}
/*---------------------------------------------------------------------
* Get a timer instance from the inanimate list, provide the
* expiration time and insert it into its proper location among
* the currently ticking timers.
*-------------------------------------------------------------------*/
static ETimer_t *
timer_start(
const ETimer_time_t duration,
Escher_xtUMLEvent_t * const event
)
{
ETimer_t * t;
#ifdef ESCHER_TASKING_SystemC
Escher_mutex_lock( SEMAPHORE_FLAVOR_TIMER );
#endif
t = inanimate;
if ( t != 0 ) {
inanimate = inanimate->next;
t->event = event;
/*---------------------------------------------------------------*/
/* Calculate the timer expiration time. */
/* Note: Add one to the duration to make sure that delay is */
/* at least as long as duration. */
/*---------------------------------------------------------------*/
t->expiration = ETimer_msec_time() + duration + 1UL;
timer_insert_sorted( t );
}
#ifdef ESCHER_TASKING_SystemC
Escher_mutex_unlock( SEMAPHORE_FLAVOR_TIMER );
Escher_nonbusy_wake( 0 ); /* Wake default task to service timers. */
#endif
return ( t );
}
/*---------------------------------------------------------------------
* This is the repetitively invoked timer poller.
* This routine needs to be run periodically.
*-------------------------------------------------------------------*/
void
TIM_tick( void )
{
#if ESCHER_SYS_MAX_XTUML_TIMERS > 0
/*-----------------------------------------------------------------*/
/* Check to see if there are timers in the ticking timers list. */
/*-----------------------------------------------------------------*/
#ifdef ESCHER_TASKING_SystemC
Escher_mutex_lock( SEMAPHORE_FLAVOR_TIMER );
#endif
if ( animate != 0 ) {
if ( animate->expiration <= ETimer_msec_time() ) {
timer_fire( animate );
}
}
#ifdef ESCHER_TASKING_SystemC
Escher_mutex_unlock( SEMAPHORE_FLAVOR_TIMER );
#endif
#endif /* if ESCHER_SYS_MAX_XTUML_TIMERS > 0 */
}
/*---------------------------------------------------------------------
* Cancel the given timer if possible.
*-------------------------------------------------------------------*/
static bool
timer_cancel(
ETimer_t * const t
)
{
bool rc = false;
#ifdef ESCHER_TASKING_SystemC
Escher_mutex_lock( SEMAPHORE_FLAVOR_TIMER );
#endif
if ( timer_find_and_delete( t ) == true ) {
if ( t->event != 0 ) {
Escher_DeletextUMLEvent( t->event );
rc = true;
}
}
#ifdef ESCHER_TASKING_SystemC
Escher_mutex_unlock( SEMAPHORE_FLAVOR_TIMER );
#endif
return ( rc );
}
