protected override void OnRender(DrawingContext drawingContext)
{
base.OnRender(drawingContext);
ProcessControlBlock lastProcess = null;
var begin = true;
foreach (FrameworkElement c in canvas.Children)
{
if (c.Tag is ProcessControlBlock pcb)
{
lastProcess = pcb;
begin = true;
c.Width = pcb.BurstTime * BlockFactor;
c.Height = ActualHeight;
Canvas.SetLeft(c, pcb.DispatchTime * BlockFactor);
}
else if (begin)
{
if (c is Line line)
{
line.X2 = line.X1 = lastProcess.DispatchTime * BlockFactor;
line.Y2 = ActualHeight + 6;
}
else
{
begin = false;
Canvas.SetLeft(c, lastProcess.DispatchTime * BlockFactor);
Canvas.SetTop(c, ActualHeight);
}
}
else
{
if (c is Line line)
{
line.X2 = line.X1 = lastProcess.EndTime * BlockFactor;
line.Y2 = ActualHeight + 6;
}
else
{
Canvas.SetLeft(c, lastProcess.EndTime * BlockFactor);
Canvas.SetTop(c, ActualHeight);
}
}
}
}
protected virtual void OnDispatch(ProcessControlBlock pcb)
{
// 프로세스 도착 시간까지 현재 시간을 진행
if (currentTime < pcb.Process.ArrivalTime)
{
currentTime = pcb.Process.ArrivalTime;
}
if (pcb.IsInitial)
{
pcb.ResponseTime = currentTime - pcb.Process.ArrivalTime;
pcb.WaitingTime = pcb.ResponseTime;
}
else
{
pcb.WaitingTime += currentTime - pcb.EndTime;
}
pcb.DispatchTime = currentTime;
pcb.BurstTime = 0;
workingPcb = pcb;
}
/// <summary>
/// CPU가 처리하는 프로세스가 종료되거나 준비 상태로 돌아가면
/// result에 PCB를 추가하고 workingPcb를 비운다.
/// </summary>
/// <param name="pcb"></param>
protected void Timeout()
{
result.Add(workingPcb);
workingPcb = null;
}
private double Calculate(ProcessControlBlock pcb)
{
var waitingTime = currentTime - pcb.Process.ArrivalTime;
return((double)(pcb.Process.BurstTime + waitingTime) / pcb.Process.BurstTime);
}