public void Update()
{
lock (stateLock)
{
switch (State)
{
case UpdateFilterState.Idle:
State = UpdateFilterState.UpdateRequested;
break;
case UpdateFilterState.UpdateInProgress:
State = UpdateFilterState.UpdateRequestQueued;
break;
case UpdateFilterState.UpdateRequested:
break;
case UpdateFilterState.UpdateRequestQueued:
break;
case UpdateFilterState.Terminate:
break;
}
}
}
public UpdateFilter(Action onUpdate, TimeSpan maxFreq)
{
this.OnUpdate = onUpdate;
dispatcher = Dispatcher.CurrentDispatcher;
UpdateThread = new Thread(new ThreadStart(doUpdateThread));
UpdateThread.Priority = ThreadPriority.BelowNormal;
UpdateThread.IsBackground = true;
UpdateThread.Start();
floodGate = new FloodGate(maxFreq);
State = UpdateFilterState.Idle;
}
protected void doUpdateThread()
{
while (State != UpdateFilterState.Terminate)
{
Thread.Sleep(10);
Thread.SpinWait(1);
switch (State)
{
case UpdateFilterState.Idle:
break;
case UpdateFilterState.UpdateInProgress:
break;
case UpdateFilterState.UpdateRequestQueued:
break;
case UpdateFilterState.UpdateRequested:
lock (stateLock)
{
State = UpdateFilterState.UpdateInProgress;
}
Task.Run(() => {
try
{
DispatcherOperation op = dispatcher.InvokeAsync(OnUpdate);
op.Wait();
}
finally
{
switch (State)
{
case UpdateFilterState.UpdateInProgress:
State = UpdateFilterState.Idle;
break;
case UpdateFilterState.UpdateRequestQueued:
State = UpdateFilterState.UpdateRequested;
break;
}
}
});
break;
}
}
}
public void Dispose()
{
State = UpdateFilterState.Terminate;
}
