/// <summary>
/// Multithreaded counterpart of SetNewDatum(), this gets the newest datum.
/// </summary>
EyeDatum _getNewDatum()
{
EyeDatum datum = null;
if (_pendingDatum)
{
//acquire new data and push it
lock (_newDatumLock)
{
//copy the newest datum
datum = new EyeDatum(_newestDatum);
_pendingDatum = false;
}
}
return datum;
}
public EyeDatum(EyeDatum datum)
{
MouseData = datum.MouseData;
TimeStamp = datum.TimeStamp;
}
/// <summary>
/// Multi-threaded symmetic counterpart of GetNewDatum. Set _newestDatum to the
/// current MouseState. Old datum is simply overwritten. The motivation for this design
/// is so that the sensor-data history data structure does not need to be blocking.
/// The consumer thread runs computations as fast as it can upon the most recent data, but
/// neither thread should block because of pending data.
///
/// TODO: evaluate if only changed data should be added; if mouse state has not changed within
/// a very brief time interval, the mouse state likely has not changed.
/// </summary>
void _setNewDatum()
{
lock (_newDatumLock)
{
if (_pendingDatum)
{
//increment misses; this is just for debugging how poorly the consumer is consuming new data.
_misses++;
}
_newestDatum = new EyeDatum(Mouse.GetState(), DateTime.Now);
_pendingDatum = true;
}
}
