class Async::Scheduler
def run_once!(timeout = 0)
@parameter timeout [Float | Nil] The maximum timeout, or if nil, indefinite.
When terminating the event loop, we already know we are finished. So we don't need to check the task tree. This is a logical requirement because `run_once` ignores transient tasks. For example, a single top level transient task is not enough to keep the reactor running, but during termination we must still process it in order to terminate child tasks.
Run one iteration of the event loop.
def run_once!(timeout = 0) ime = Async::Clock.now l = @timers.wait_interval ere is no interval to wait (thus no timers), and no tasks, we could be done: rval.nil? w the user to specify a maximum interval if we would otherwise be sleeping indefinitely: al = timeout nterval < 0 ave timers ready to fire, don't sleep in the selctor: al = 0 imeout and interval > timeout al = timeout tor.select(interval) Errno::EINTR re. .fire te load: e = Async::Clock.now uration = end_time - start_time ration = @selector.idle_duration ration = total_duration - idle_duration ime += busy_duration ime += idle_duration eactor still has work to do: true