long EventLoop::earliest_expire_time()
{
TimerPtr timer = timer_heap_.top();
if (!timer)
return -1;
long delay = timer->expire_msec() - current_msec_;
return (delay > 0) ? delay : 0;
}
int EventLoop::get_ready_events()
{
int nevents = expired_timers_.size() + fired_events_.size();
if (nevents == 0) {
long delta = current_msec_;
long earliest = earliest_expire_time();
nevents = poller_->dispatch(fired_events_, earliest);
update_time();
delta = current_msec_ - delta;
if (delta) {
TimerPtr timer = timer_heap_.top();
while (timer && timer->expire_msec() <= current_msec_) {
expired_timers_.push_back(timer);
timer_heap_.pop();
timer = timer_heap_.top();
++nevents;
}
}
}
return nevents;
}