/* timer_fire --
Sends all current timer events.
Returns number of milliseconds until
next timer event (or a large number)
*/
int
timer_fire(void)
{
evtime_t now;
evtime_now(&now);
while (timers && evtime_cmp(&now,&timers->date)>=0)
{
struct event_timer *ti = timers;
at *p = cons(named("timer"), cons(new_gptr(ti), NIL));
timers = ti->next;
event_add(ti->handler, p);
UNLOCK(p);
if (ti->period.sec>0 || ti->period.msec>0)
{
/* Periodic timer shoot only once per call */
while(evtime_cmp(&now,&ti->date) >= 0)
evtime_add(&ti->date,&ti->period,&ti->date);
ti_insert(ti);
}
else
{
/* One shot timer */
free(ti);
}
}
if (timers)
{
evtime_t diff;
evtime_sub(&timers->date, &now, &diff);
if (diff.sec < 24*3600)
return diff.sec * 1000 + diff.msec;
}
return 24*3600*1000;
}
/* timer_add --
* Add a timer targeted to the specified handler
* firing after delay milliseconds and every period
* milliseconds after that. Specifying period equal
* to zero sets a one shot timer.
*/
void *timer_add(at *handler, int delay, int period)
{
evtime_t now, add;
evtime_now(&now);
if (!handler)
RAISEF("invalid event handler", handler);
if (delay < 0)
RAISEF("invalid timer delay", NEW_NUMBER(delay));
if (period < 0)
RAISEF("invalid timer interval", NEW_NUMBER(period));
if (period > 0 && period < 20)
period = 20;
add.sec = delay/1000;
add.msec = delay%1000;
evtime_add(&now, &add, &add);
return timer_add_sub(handler, add.sec, add.msec, period);
}
/* timer_add --
Add a timer targeted to the specified handler
firing after delay milliseconds and every period
milliseconds after that. Specifying period equal
to zero sets a one shot timer.
*/
void *
timer_add(at *handler, int delay, int period)
{
evtime_t now, add;
evtime_now(&now);
if (! handler)
error(NIL,"Illegal null event handler",NIL);
if (delay < 0)
error(NIL,"Illegal timer delay",NEW_NUMBER(delay));
if (period < 0)
error(NIL,"Illegal timer interval",NEW_NUMBER(period));
if (period > 0 && period < 20)
period = 20;
add.sec = delay/1000;
add.msec = delay%1000;
evtime_add(&now, &add, &add);
return timer_add_sub(handler, add.sec, add.msec, period);
}
