//Must call leave after train exits registered rail
public void Register(Train train)
{
lock (_signalLock)
{
if (CurrentTrain == null)
{
CurrentTrain = train;
CurrentTrain.Signal(this);
}
else
{
_trains.Enqueue(train);
}
}
}
//Signals that no train is currently on rail
public void Leave(Train train)
{
lock (_signalLock)
{
if (CurrentTrain == null || train.Guid != CurrentTrain.Guid)
{
return;
}
if (_trains.Count > 0)
{
CurrentTrain = _trains.Dequeue();
CurrentTrain.Signal(this);
}
else
{
CurrentTrain = null;
}
}
}