/**
* Delay the next timer invocation by 'backoff_us'
*/
void rd_kafka_timer_backoff (rd_kafka_timers_t *rkts,
rd_kafka_timer_t *rtmr, int backoff_us) {
rd_kafka_timers_lock(rkts);
if (rd_kafka_timer_scheduled(rtmr))
rd_kafka_timer_unschedule(rkts, rtmr);
rd_kafka_timer_schedule(rkts, rtmr, backoff_us);
rd_kafka_timers_unlock(rkts);
}
/**
* Dispatch timers.
* Will block up to 'timeout' microseconds before returning.
*/
void rd_kafka_timers_run (rd_kafka_timers_t *rkts, int timeout_us) {
rd_ts_t now = rd_clock();
rd_ts_t end = now + timeout_us;
rd_kafka_timers_lock(rkts);
while (!rd_atomic32_get(&rkts->rkts_rk->rk_terminate) && now <= end) {
int64_t sleeptime;
rd_kafka_timer_t *rtmr;
if (timeout_us != RD_POLL_NOWAIT) {
sleeptime = rd_kafka_timers_next(rkts,
timeout_us,
0/*no-lock*/);
if (sleeptime > 0) {
cnd_timedwait_ms(&rkts->rkts_cond,
&rkts->rkts_lock,
(int)(sleeptime / 1000));
}
}
now = rd_clock();
while ((rtmr = TAILQ_FIRST(&rkts->rkts_timers)) &&
rtmr->rtmr_next <= now) {
rd_kafka_timer_unschedule(rkts, rtmr);
rd_kafka_timers_unlock(rkts);
rtmr->rtmr_callback(rkts, rtmr->rtmr_arg);
rd_kafka_timers_lock(rkts);
/* Restart timer, unless it has been stopped, or
* already reschedueld (start()ed) from callback. */
if (rd_kafka_timer_started(rtmr) &&
!rd_kafka_timer_scheduled(rtmr))
rd_kafka_timer_schedule(rkts, rtmr, 0);
}
if (timeout_us == RD_POLL_NOWAIT) {
/* Only iterate once, even if rd_clock doesn't change */
break;
}
}
rd_kafka_timers_unlock(rkts);
}
/**
* Stop a timer that may be started.
* If called from inside a timer callback 'lock' must be 0, else 1.
*/
void rd_kafka_timer_stop (rd_kafka_timers_t *rkts, rd_kafka_timer_t *rtmr,
int lock) {
if (lock)
rd_kafka_timers_lock(rkts);
if (!rd_kafka_timer_started(rtmr)) {
if (lock)
rd_kafka_timers_unlock(rkts);
return;
}
if (rd_kafka_timer_scheduled(rtmr))
rd_kafka_timer_unschedule(rkts, rtmr);
rtmr->rtmr_interval = 0;
if (lock)
rd_kafka_timers_unlock(rkts);
}
/**
* @returns the delta time to the next time (>=0) this timer fires, or -1
* if timer is stopped.
*/
rd_ts_t rd_kafka_timer_next (rd_kafka_timers_t *rkts, rd_kafka_timer_t *rtmr,
int do_lock) {
rd_ts_t now = rd_clock();
rd_ts_t delta = -1;
if (do_lock)
rd_kafka_timers_lock(rkts);
if (rd_kafka_timer_scheduled(rtmr)) {
delta = rtmr->rtmr_next - now;
if (delta < 0)
delta = 0;
}
if (do_lock)
rd_kafka_timers_unlock(rkts);
return delta;
}