public static List <memoryitem> FirstFit(process newprocess, List <memoryitem> memory) //approved
{
process nprocess = newprocess;
foreach (var item in memory)
{
if (item.type == "h")
{
if (item.size >= newprocess.size)
{
//get el starting address w el size
int startaddress = item.getstratingadd();
int size = item.getsize();
//add new process in pos (starting address)
nprocess.setstarting_add(startaddress);
memory.Add(nprocess);
//add new hole in pos start address+size of process its size equals ( old hole size - new process size)
hole nhole = new hole((startaddress + nprocess.getsize()), (size - nprocess.getsize()));
memory.Add(nhole);
//delete el hole el adema
memory.Remove(item);
allprocess.Add(nprocess);
break;
}
//else Console.WriteLine("Process {0} is aded to waiting queue.", nprocess.getname());
}
}
concatenate(memory);
return(memory);
}
public static List <memoryitem> WorstFit(process newprocess, List <memoryitem> memory) //approved
{
process nprocess = newprocess;
List <memoryitem> temp = memory;
temp.OrderByDescending(d => d.getsize());
foreach (var item in temp)
{
if (item.type == "h")
{
if (item.size >= newprocess.size)
{
//get el starting address w el size
int startaddress = item.getstratingadd();
int size = item.getsize();
//add new process in pos (starting address)
nprocess.setstarting_add(startaddress);
memory.Add(nprocess);
//add new hole in pos start address+size of process its size equals ( old hole size - new process size)
hole nhole = new hole((startaddress + nprocess.getsize()), (size - nprocess.getsize()));
memory.Add(nhole);
//delete el hole el adema
memory.Remove(item);
allprocess.Add(nprocess);
break;
}
}
}
concatenate(memory);
return(memory);
}
private void label_Click(object sender, EventArgs e)
{
string message = "are you sure you want to delete all segments of this process?";
string caption = "";
MessageBoxButtons buttons = MessageBoxButtons.YesNo;
DialogResult result;
// Displays the MessageBox.
result = MessageBox.Show(message, caption, buttons);
if (result == System.Windows.Forms.DialogResult.Yes)
{
Label clickedLabel = sender as Label;
hole p = new hole();
foreach (hole h in memory)
{
if (h.Owner.Name + h.Name == clickedLabel.Text)
{
p = h;
}
}
deallocate(p, clickedLabel);
}
}
void generate_holes()
{
double current = 0;
if (seg_list.Count == 0)
{
h_list.Clear();
hole h = new hole(current, memSize);
h_list.Add(h);
}
else
{
seg_list.Sort((x, y) => x.start.CompareTo(y.start));
h_list.Clear();
for (int i = 0; i < seg_list.Count; i++)
{
if (current < seg_list[i].start)
{
hole h = new hole(current, seg_list[i].start - current);
h_list.Add(h);
current = seg_list[i].start + seg_list[i].size;
}
else
{
current += seg_list[i].size;
}
}
if (current < memSize)
{
hole h = new hole(current, memSize - current);
h_list.Add(h);
current = memSize;
}
}
}
public static void concatenate(List <memoryitem> L) // approved
{
List <memoryitem> temp = L;
List <memoryitem> holes = new List <memoryitem>();
hole h = new hole();
foreach (var item in temp)
{
if (item.type == "h")
{
holes.Add(item);
}
}
holes.OrderBy(add => add.getstratingadd());
for (int i = 0; i < holes.Count - 1; i++)
{
int size1 = holes[i].getsize();
int size2 = holes[i + 1].getsize();
int add1 = holes[i].getstratingadd();
int add2 = holes[i + 1].getstratingadd();
if (add1 + size1 == add2)
{
L.Remove(holes[i]);
L.Remove(holes[i + 1]);
h.setsize(size1 + size2);
h.setstarting_add(add1);
L.Add(h);
}
}
}
void add_holes(List <double> start, List <double> size)
{
for (int i = 0; i < start.Count; i++)
{
hole h = new hole(start[i], size[i]);
h_list.Add(h);
}
}
private void process_btn_Click(object sender, EventArgs e)
{
hole s = new hole();
if (name_of_segment_tb.Text != "" || size_of_sigment_tb.Text != "")
{
s.Name = name_of_segment_tb.Text;
if (double.TryParse(size_of_sigment_tb.Text, out double temp1))
{
s.Size = temp1;
}
else
{
MessageBox.Show("Invalid segment size!!!!!!!!");
return;
}
}
else
{
MessageBox.Show("enter all the info!!");
}
s.Owner = processes.Last.Value;
processes.Last.Value.segments.AddLast(s);
segments_enterd++;
if (segments_enterd == current_process_no_segments)
{
name_of_segment_tb.Enabled = false;
size_of_sigment_tb.Enabled = false;
process_btn.Enabled = false;
segments_enterd = 0;
number_of_segments_tb.Enabled = true;
number_of_segments_btn.Enabled = true;
button1.Enabled = true;
}
name_of_segment_tb.Text = "";
size_of_sigment_tb.Text = "";
label1.Text = "";
foreach (Process P in processes)
{
label1.Text += P.Name + "\n";
foreach (hole h in P.segments)
{
label1.Text += h.Name + " " + h.Size + "\n";
}
}
}
private void deallocate(hole s, Label l)
{
if (s.Name.Contains("old process"))
{
s.Name = "hole" + holes.Count;
holes.AddLast(s);
holes_sorted_by_address.Clear();
IEnumerable <hole> query = holes.OrderBy(h => h.Address);
foreach (hole h in query)
{
holes_sorted_by_address.AddLast(h);
}
//l.Text = s.Name;
check_adjacent_holes();
delete(ram1);
IEnumerable <hole> query1 = memory.OrderBy(h => h.Address);
foreach (hole h in query1)
{
draw(h, ram1);
}
}
else if (s.Owner.Name != "")
{
Process process_to_remove = s.Owner;
foreach (hole segment in process_to_remove.segments)
{
segment.Name = "hole" + holes.Count;
segment.Hole_Occupied = "";
segment.Owner = new Process();
holes.AddLast(segment);
holes_sorted_by_address.Clear();
IEnumerable <hole> query1 = holes.OrderBy(h => h.Address);
foreach (hole h in query1)
{
holes_sorted_by_address.AddLast(h);
}
// l.Text = segment.Name;
}
check_adjacent_holes();
delete(ram1);
IEnumerable <hole> query = memory.OrderBy(h => h.Address);
foreach (hole h in query)
{
draw(h, ram1);
}
}
}
void fix_holes()
{
for (int i = 0; i < h_list.Count - 1; i++)
{
if (h_list[i].start + h_list[i].size == h_list[i + 1].start)
{
hole h = new hole(h_list[i].start, h_list[i + 1].size + h_list[i].size);
h_list.RemoveAt(i);
h_list.RemoveAt(i);
h_list.Insert(i, h);
}
}
}
/* private void GenerateTable(int columnCount, int rowCount)
* {
* //Clear out the existing controls, we are generating a new table layout
* tableLayoutPanel1.Controls.Clear();
*
* //Clear out the existing row and column styles
* tableLayoutPanel1.ColumnStyles.Clear();
* tableLayoutPanel1.RowStyles.Clear();
*
* //Now we will generate the table, setting up the row and column counts first
* tableLayoutPanel1.ColumnCount = columnCount;
* tableLayoutPanel1.RowCount = rowCount;
*
* for (int x = 0; x < columnCount; x++)
* {
* //First add a column
* tableLayoutPanel1.ColumnStyles.Add(new ColumnStyle(SizeType.AutoSize));
*
* for (int y = 0; y < rowCount; y++)
* {
* //Next, add a row. Only do this when once, when creating the first column
* if (x == 0)
* {
* tableLayoutPanel1.RowStyles.Add(new RowStyle(SizeType.AutoSize));
* }
*
* //Create the control, in this case we will add a button
* Label cmd = new Label();
* cmd.Text = "ahmed"; //Finally, add the control to the correct location in the table
* tableLayoutPanel1.Controls.Add(cmd, x, y);
* }
* }
* }
*/
private void check_adjacent_holes()
{
int counter = 0;
hole[] holes_sorted = new hole[holes_sorted_by_address.Count];
int i = 0;
foreach (hole h in holes_sorted_by_address)
{
holes_sorted[i] = h;
i++;
}
while (true)
{
counter = 0;
for (int j = 0; j < holes_sorted_by_address.Count - 1; j++)
{
for (int k = j + 1; k < holes_sorted_by_address.Count; k++)
{
if ((holes_sorted[j].Address > -1 && holes_sorted[k].Address > -1) && (holes_sorted[j].Size > 0 && holes_sorted[k].Size > 0) && holes_sorted[j].Address + holes_sorted[j].Size == holes_sorted[k].Address)
{
holes_sorted[j].Size += holes_sorted[k].Size;
holes_sorted[k].Size = 0;
holes_sorted[k].Address = -1;
counter++;
}
}
}
if (counter == 0)
{
holes_sorted_by_address.Clear();
foreach (hole h in holes_sorted)
{
holes_sorted_by_address.AddLast(h);
}
break;
}
}
}
static void Main(string[] args)
{
hole h1 = new hole(50, 220);
hole h2 = new hole(300, 100);
hole h3 = new hole(560, 140);
hole h4 = new hole(700, 80);
process p1 = new process("p1", 150);
process p2 = new process("p2", 130);
process p3 = new process("p3", 270);
process p4 = new process("p4", 50);
process p5 = new process("p5", 180);
process p6 = new process("p6", 90);
List <memoryitem> x = new List <memoryitem>();
x.Add(h1); x.Add(h2); x.Add(h3); x.Add(h4);
//MemoryAllocation.methodology.FirstFit(p1, x);
//MemoryAllocation.methodology.FirstFit(p2, x);
//MemoryAllocation.methodology.FirstFit(p3, x);
//MemoryAllocation.methodology.FirstFit(p4, x);
//MemoryAllocation.methodology.FirstFit(p5, x);
//MemoryAllocation.methodology.FirstFit(p6, x);
//MemoryAllocation.methodology.deallocate("p4", x);
MemoryAllocation.methodology.BestFit(p1, x);
MemoryAllocation.methodology.BestFit(p2, x);
MemoryAllocation.methodology.BestFit(p3, x);
MemoryAllocation.methodology.BestFit(p4, x);
MemoryAllocation.methodology.BestFit(p5, x);
MemoryAllocation.methodology.BestFit(p6, x);
//MemoryAllocation.methodology.WorstFit(p1, x);
//MemoryAllocation.methodology.WorstFit(p2, x);
//MemoryAllocation.methodology.WorstFit(p3, x);
//MemoryAllocation.methodology.WorstFit(p4, x);
//MemoryAllocation.methodology.WorstFit(p5, x);
//MemoryAllocation.methodology.WorstFit(p6, x);
foreach (var item in x)
{
Console.Write(item.getstratingadd());
Console.WriteLine();
Console.Write(item.getsize());
Console.WriteLine();
}
}
public static List <memoryitem> deallocate(string processname, List <memoryitem> memory)
{
string name = processname;
foreach (var item in memory)
{
if (item.type == "p" && item.getname() == name)
{
int size = item.getsize();
int address = item.getstratingadd();
memory.Remove(item);
allprocess.Remove(item);
hole nhole = new hole((address), (size));
memory.Add(nhole);
break;
}
}
concatenate(memory);
return(memory);
}
private void draw(hole h, TableLayoutPanel t)
{
if (h.Size > 0 && h.Address > -1)
{
Label l = new Label();
RowStyle temp = t.RowStyles[t.RowCount - 1];
t.RowCount++;
t.RowStyles.Add(new RowStyle(temp.SizeType, 50));
t.Controls.Add(l, 1, t.RowCount - 1);
l.Text = h.Owner.Name + h.Name;
if (h.Name.Contains("hole"))
{
l.Text = "hole";
}
if (h.Owner.Name != "" || h.Name.Contains("old process"))
{
l.Click += new EventHandler(this.label_Click);
}
if (h.Address == 0)
{
t.Controls.Add(new Label()
{
Text = h.Address + "\n" + (h.Address + h.Size)
}, 0, t.RowCount - 1);
}
else
{
t.Controls.Add(new Label()
{
Text = "\n" + (h.Address + h.Size)
}, 0, t.RowCount - 1);
}
/* tableLayoutPanel1.RowCount++;
* tableLayoutPanel1.RowStyles.Add(new RowStyle(SizeType.AutoSize));
* tableLayoutPanel1.Controls.Add(new Label() { Text = h.Name }, 1, tableLayoutPanel1.RowCount - 1);
* tableLayoutPanel1.Controls.Add(new Label() { Text = h.Address + "\n" + (h.Address + h.Size) }, 0, tableLayoutPanel1.RowCount - 1);
*/
}
}
public void inserthole(hole hole, List <memoryitem> memory)
{
// check holes
memory.Add(hole);
}
private void best_fit()
{
hole[] temp_holes = new hole[holes_sorted_by_address.Count];
LinkedList <hole> temp_memory = new LinkedList <hole>();
IEnumerable <hole> query1 = holes_sorted_by_address.OrderBy(h => h.Size);
int i = 0;
foreach (hole h in query1)
{
temp_holes[i] = h;
i++;
}
foreach (Process p in processes)
{
if (p.Allocated == false)
{
foreach (hole s in p.segments)
{
foreach (hole h in temp_holes)
{
if (h.Size >= s.Size)
{
s.Address = h.Address;
h.Address += s.Size;
h.Size -= s.Size;
s.Hole_Occupied = h.Name;
break;
}
}
if (s.Address == -1)
{
p.Fit = false;
foreach (hole segment in p.segments)
{
if (segment.Hole_Occupied == "")
{
break;
}
foreach (hole h in temp_holes)
{
if (segment.Hole_Occupied == h.Name)
{
h.Address -= segment.Size;
h.Size += segment.Size;
s.Address = -1;
s.Hole_Occupied = "";
break;
}
}
}
break;
}
}
}
}
foreach (hole h in temp_holes)
{
temp_memory.AddLast(h);
}
foreach (Process p in processes)
{
if (p.Fit == true && p.Allocated == false)
{
foreach (hole s in p.segments)
{
memory.AddLast(s);
p.Allocated = true;
}
}
}
IEnumerable <hole> query = memory.OrderBy(h => h.Address);
foreach (hole h in query)
{
draw(h, ram1);
}
}
private void memory_init()
{
int i = 0;
IEnumerable <hole> query = holes.OrderBy(h => h.Address);
hole[] holes_sorted = new hole[holes.Count];
foreach (hole h in query)
{
holes_sorted[i] = h;
holes_sorted_by_address.AddLast(h);
i++;
}
for (int j = 0; j < holes.Count; j++)
{
if (j == 0)
{
if (holes_sorted[j].Address > 0)
{
hole temp = new hole();
temp.Address = 0;
temp.Size = holes_sorted[j].Address;
temp.Name = "old process" + old_processes.Count;
old_processes.AddLast(temp);
}
if (holes.Count == 1)
{
if (holes_sorted[j].Address + holes_sorted[j].Size < globals.total_memory_size)
{
hole temp1 = new hole();
temp1.Address = holes_sorted[j].Address + holes_sorted[j].Size;
temp1.Size = globals.total_memory_size - temp1.Address;
temp1.Name = "old process" + old_processes.Count;
old_processes.AddLast(temp1);
}
}
}
else if (holes_sorted[j].Address > holes_sorted[j - 1].Address + holes_sorted[j - 1].Size)
{
hole temp = new hole();
temp.Address = holes_sorted[j - 1].Address + holes_sorted[j - 1].Size;
temp.Size = holes_sorted[j].Address - temp.Address;
temp.Name = "old process" + old_processes.Count;
old_processes.AddLast(temp);
if (j == holes.Count - 1)
{
if (holes_sorted[j].Address + holes_sorted[j].Size < globals.total_memory_size)
{
hole temp1 = new hole();
temp1.Address = holes_sorted[j].Address + holes_sorted[j].Size;
temp1.Size = globals.total_memory_size - temp1.Address;
temp1.Name = "old process" + old_processes.Count;
old_processes.AddLast(temp1);
}
}
}
else if (j == holes.Count - 1)
{
if (holes_sorted[j].Address + holes_sorted[j].Size < globals.total_memory_size)
{
hole temp1 = new hole();
temp1.Address = holes_sorted[j].Address + holes_sorted[j].Size;
temp1.Size = globals.total_memory_size - temp1.Address;
temp1.Name = "old process" + old_processes.Count;
old_processes.AddLast(temp1);
}
}
}
//*******************************************************************************
IEnumerable <hole> query2 = holes_sorted_by_address.Concat(old_processes);
IEnumerable <hole> query1 = query2.OrderBy(h => h.Address);
//********************************************************************************
foreach (hole h in query1)
{
memory.AddLast(h);
}
foreach (hole h in memory)
{
//GenerateTable(2, 1);
draw(h, ram);
}
}
private void hole_btn_Click(object sender, EventArgs e)
{
int i = 0;
hole h = new hole();
label3.Text = "";
if (Int64.TryParse(hole_address_tb.Text, out Int64 temp))
{
if (holes.Count > 0)
{
foreach (hole x in holes)
{
if (temp >= x.Address && temp < x.Address + x.Size)
{
hole_address_tb.Text = "";
hole_size_tb.Text = "";
MessageBox.Show("Invalid hole 1!!!!!!!!");
return;
}
}
}
h.Address = temp;
hole_address_tb.Text = "";
}
else
{
hole_address_tb.Text = "";
hole_size_tb.Text = "";
MessageBox.Show("Invalid hole 2!!!!!!!!");
return;
}
if (double.TryParse(hole_size_tb.Text, out double temp1))
{
if (holes.Count > 0)
{
foreach (hole x in holes)
{
if (temp + temp1 > x.Address && temp + temp1 < x.Address + x.Size)
{
hole_address_tb.Text = "";
hole_size_tb.Text = "";
MessageBox.Show("Invalid hole 3!!!!!!!!");
return;
}
}
}
h.Size = temp1;
hole_size_tb.Text = "";
}
else
{
hole_address_tb.Text = "";
hole_size_tb.Text = "";
MessageBox.Show("Invalid hole 4!!!!!!!!");
}
if (h.Address == -1 || h.Size == -1)
{
hole_address_tb.Text = "";
hole_size_tb.Text = "";
MessageBox.Show("Invalid hole 5!!!!!!!!");
}
else
{
holes.AddLast(h);
}
foreach (hole x in holes)
{
x.Name = "hole" + i;
label3.Text += x.Name + " " + x.Address + " " + x.Size + "\n";
i++;
}
}
public void newHole(List <hole> hole_list, double st, double sz)
{
hole h = new hole(st, sz);
hole_list.Add(h);
}