/// <summary>
/// Create a stage program.
/// </summary>
/// <param name="clock">Clock for timing</param>
/// <param name="stageProvider">Stage provider that providing stages</param>
/// <param name="preferPreloaded">Prefer pre-loaded stages if possible</param>
public StageProgram([NotNull] IClock clock, [NotNull] IStageProvider stageProvider, bool preferPreloaded = true)
{
if (stageProvider == null)
{
throw new ArgumentNullException(nameof(stageProvider));
}
OriginalClock = clock ?? throw new ArgumentNullException(nameof(clock));
FreezableClock = new FreezableClock(clock.As(TimeUnit.Millisecond));
FreezableClock.Frozen += (sender, e) => _pausedEvent.Set();
FreezableClock.Unfrozen += (sender, e) => _pausedEvent.Reset();
_stageProvider = preferPreloaded && stageProvider.TryPreload(out var preloaded) ? preloaded : stageProvider;
_cyclicExecutor = new AsyncCyclicExecutor("StageProgram Worker", DoWork, true, ThreadPriority.Highest, null, StoppingAction.Abort);
_cyclicExecutor.Starting += (sender, e) =>
{
CurrentStage = null;
_pausedEvent.Set();
StartTime = Time;
_nextUpdateTime = 0;
};
_cyclicExecutor.Started += (sender, e) => Started?.Invoke(this, EventArgs.Empty);
_cyclicExecutor.Stopped += (sender, e) => Stopped?.Invoke(this, EventArgs.Empty);
_stageSkipped = new AtomicBool(false);
_pausedEvent = new ManualResetEvent(false);
}