/* -*- C++ -*- */
interface ThreeTier
{
  /// record the occurrence of a tick
  oneway void tick ();

  /// record the occurrence of a tock
  void tock ();

  /// report the number of ticks
  unsigned long tickCount();

  /// report the number of tocks
  unsigned long tockCount();

  /// Shutdown the application.
  oneway void shutdown ();
};