EventModerationPolicy, EventedStateVariable, MaximumRateModerationPolicy, MinimumDeltaModerationPolicy, NoModerationPolicy, StateProvider
An EventModerationPolicy controls the frequency of events
sent when an evented state variable changes.
A helper class template for implementing UPnP evented state
This event moderation policy will fire an event at most every n seconds.
This event moderation policy will fire an event whenever the
value of an event variable changes more than the given
minimum delta since the last time an event was sent.
This event moderation policy does no moderation and
fires an event whenever the event variable's value changes
(the valueChanged() member function is called).
This interface should be provided by all UPnP services
supporting evented state variables.