static void pl(process p)
{
LinkedListNode <process> i;
if (list.Count == 0)
{
list.AddLast(p);
}
else if (p.arrivalTime < list.First.Value.arrivalTime)
{
list.AddFirst(p);
}
else if (p.arrivalTime >= list.Last.Value.arrivalTime)
{
list.AddLast(p);
}
else
{
i = list.Last;
while (i.Value.arrivalTime > p.arrivalTime)
{
i = i.Previous;
}
list.AddAfter(i, p);
}
}
//Time calculations and store the final processes' queue in a new list and linked list
static void arrange(process task, int start, int total, int i)
{
task.completionTime = total - start;
task.turnArroundTime = task.completionTime - task.arrivalTime;
task.waitingTime = task.turnArroundTime - task.burstTime;
output.Add(task);
}
static void Round_R()
{
process p = new process();
int d; // detect the current timing of the process
float waiting = 0;
var k = processes[0];
d = k.arrivalTime;
queue.AddFirst(k);
processes.RemoveAt(0);
if (processes.Count != 0)
{
k = processes[0];
}
else
{
k.end = 1;
}
float turnAroundTime = 0;
var temp = queue.First;
bool detectProcessRemoval = false;
bool smallerProcess = false;
while (queue.Count != 0 || processes.Count != 0)
{
if ((k.end != 1 && k.arrivalTime <= d) && d != 0)
{
if (detectProcessRemoval)
{
queue.AddLast(k);
processes.RemoveAt(0);
if (processes.Count == 0)
{
k.end = 1;
}
else
{
k = processes[0];
}
detectProcessRemoval = false;
while (k.end != 1 && k.arrivalTime <= d)
{
queue.AddLast(k);
if (processes.Count == 0)
{
k.end = 1;
}
else
{
k = processes[0];
}
processes.RemoveAt(0);
}
}
else
{
temp = queue.Last;
queue.AddBefore(temp, k);
if (processes.Count == 0)
{
k.end = 1;
}
else
{
k = processes[0];
}
list.RemoveFirst();
}
}
else
{
smallerProcess = false;
p = queue.First.Value;
if (p.burstTime > quantumTime)
{
p.burstTime -= quantumTime;
queue.RemoveFirst();
queue.AddLast(p);
}
else
{
smallerProcess = true;
d += p.burstTime;
p.burstTime = 0;
turnAroundTime = (d - p.arrivalTime);
waiting = waiting + (turnAroundTime - burstTime[queue.First.Value.pID - 1]) / (P_pID);
queue.RemoveFirst();
detectProcessRemoval = true;
}
if (!smallerProcess)
{
d += quantumTime;
}
if (output.Count != 0 && output[output.Count - 1].pID == queue.First.Value.pID)
{
process m = output[output.Count - 1];
m.on_time++;
output.RemoveAt(output.Count - 1);
output.Add(m);
}
else
{
output.Add(queue.First.Value);
}
}
}
}
static void RQ(process p)
{
if (process_type == "SJF")
{
if (queue.Count == 0)
{
queue.AddFirst(p);
}
else if (queue.Count == 1)
{
if ((preemptive || queue.First.Value.started == 0) && p.burstTime < queue.First.Value.burstTime)
{
queue.AddFirst(p);
}
else
{
queue.AddLast(p);
}
}
else if (p.burstTime > queue.Last.Value.burstTime)
{
queue.AddLast(p);
}
else
{
LinkedListNode <process> i = preemptive ? queue.First : queue.First.Next;
while (i.Value.burstTime <= p.burstTime)
{
i = i.Next;
}
queue.AddBefore(i, p);
}
}
else if (process_type == "PRIORITY")
{
if (queue.Count == 0)
{
queue.AddFirst(p);
}
else if (queue.Count == 1)
{
if ((preemptive || queue.First.Value.started == 0) && p.priority < queue.First.Value.priority)
{
queue.AddFirst(p);
}
else
{
queue.AddLast(p);
}
}
else if (p.priority > queue.Last.Value.priority)
{
queue.AddLast(p);
}
else
{
LinkedListNode <process> i = preemptive ? queue.First : queue.First.Next;
while (i.Value.priority <= p.priority)
{
i = i.Next;
}
queue.AddBefore(i, p);
}
}
}
static void priority_sjf()
{
process p = new process();
int d; // detect the current timing of the process
float waiting = 0;
// var k = list.First;
var k = processes[0];
d = k.arrivalTime;
RQ(k);
processes.RemoveAt(0);
if (processes.Count != 0)
{
k = processes[0];
}
else
{
k.end = 1;
}
float turnAroundTime = 0;
while (queue.Count != 0 || processes.Count != 0)
{
if (k.end != 1 && k.arrivalTime == d)
{
RQ(k);
processes.RemoveAt(0);
if (processes.Count == 0)
{
k.end = 1;
}
else
{
k = processes[0];
}
}
else
{
//Console.Write(queue.First.Value.pID + " ");
p = queue.First.Value;
queue.RemoveFirst();
p.started++;
d++;
if (p.started == p.burstTime)
{
turnAroundTime = (d - p.arrivalTime);
waiting = waiting + (turnAroundTime - p.burstTime) / P_pID;
}
else
{
queue.AddFirst(p);
}
if (output.Count != 0 && output[output.Count - 1].pID == p.pID)
{
process m = output[output.Count - 1];
m.on_time++;
output.RemoveAt(output.Count - 1);
output.Add(m);
}
else
{
output.Add(p);
}
}
}
}
private void button1_Click(object sender, EventArgs e)
{
Clear_Val();
P_pID = int.Parse(textBox1.Text);
preemptive = checkBox1.Checked;
string[] A = textBox2.Text.Split(' ');
string[] B = textBox3.Text.Split(' ');
string[] P = { };
if (process_type == "PRIORITY")
{
P = textBox4.Text.Split(' ');
}
else if (process_type == "RR")
{
quantumTime = int.Parse(textBox5.Text);
}
process p = new process();
for (int i = 0; i < P_pID; i++)
{
p.pID = i + 1;
p.arrivalTime = int.Parse(A[i]);
p.burstTime = int.Parse(B[i]);
if (process_type == "PRIORITY")
{
p.priority = int.Parse(P[i]);
}
p.end = 0;
p.started = 0;
p.on_time = 1;
processes.Add(p);
}
processes.Sort((x, y) => x.arrivalTime - y.arrivalTime);
switch (process_type)
{
case "FCFS":
FCFS();
break;
case "PRIORITY":
case "SJF":
priority_sjf();
break;
case "RR":
Round_R();
break;
}
foreach (process l in output)
{
Label tempLabel_RR = new Label();
tempLabel_RR.Enabled = true;
tempLabel_RR.BorderStyle = BorderStyle.FixedSingle;
tempLabel_RR.Font = new Font("Arial", 10, FontStyle.Bold);
tempLabel_RR.Text = "P" + l.pID;
if (process_type == "FCFS")
{
tempLabel_RR.Width = 35 + l.burstTime * 10;
}
else
{
tempLabel_RR.Width = 35 + l.on_time * 10;
}
flowLayoutPanel1.Controls.Add(tempLabel_RR);
}
}