Real-time daemon. This is an event that occurs repeatedly at given real-time intervals. When a daemon is executed, it is scheduled again for execution after its real-time interval elapses again. The daemon's first execution will occur one interval from the time at which the daemon is created.

If a daemon is executed late (because other, more pressing tasks had to be completed first, or because the user was busy editing a command line and the local platform doesn't support real-time command interruptions), the interval is applied to the time the daemon actually executed, not to the originally scheduled execution time. For example, if the daemon is scheduled to run once every minute, but can't run at all for five minutes because of command editing on a non-interrupting platform, once it actually does run, it won't run again for (at least) another minute after that. This means that the daemon will not run five times all at once when it's finally allowed to run - there's no making up for lost time.

class RealTimeDaemon :   RealTimeEvent