package async_kernel

This value is close to next_alarm_fires_at but differs from it by at most alarm_precision. Requires a more expensive iteration of alarms.

This is a closer approximation of the minimum time at which an alarm will fire, but it's still not there (you need min_alarm_time_... for that).

Returns true iff there is work to do without advancing time further. (This can be caused by scheduling events in the past, or starting a recurring event.)