public void releaseMem(RAM ram, PCB pcb) //Releases an individual processes memory
{
for (int i = pcb.ramBaseAddress; i <= pcb.ramBaseAddress + pcb.spaceReq; i++)
{
if (i >= ram.data.Length || i < 0)
{
if (debugMode)
{
Console.WriteLine("ERROR! i is " + i);
}
}
ram.data[i] = -1;
}
}
public void sortQueue() //Makes the queue a priority queue
{
for (int i = 0; i < this.queue.Length - 1; i++)
{
for (int j = i + 1; j < this.queue.Length; j++)
{
if (this.queue[i].priority > this.queue[j].priority)
{
PCB temp = new PCB();
temp = this.queue[i];
this.queue[i] = this.queue[j];
this.queue[j] = temp;
}
}
}
}
public void execute(RAM ram, pcbQueue pcbQueue, Scheduler schedule, cpuQueue que)
{
while (pcbQueue.jobsComplete() == false)
{
while (this != que.head || pcbQueue.cpuIterator >= pcbQueue.ramIterator)
{
//do nothing
if (pcbQueue.jobsComplete() == true)
{
return;
}
Thread.Yield();
}
PCB temp = pcbQueue.queue[pcbQueue.cpuIterator];
if (debugMode)
{
Console.WriteLine("CPU " + this.id + " executing job " + temp.processID);
}
pcbQueue.cpuIterator++;
que.deQueue();
temp.startTime = DateTime.Now.TimeOfDay;
temp.waitTime = temp.startTime - temp.ramLoadTime;
PopulateInstructionList(ram, temp);
this.StartWork(temp);
temp.timeCompleted = DateTime.Now.TimeOfDay;
if (debugMode)
{
temp.core = pcbQueue.getCoreDump(temp, ram);
}
temp.executionTime = temp.timeCompleted - temp.startTime;
temp.complete = true;
this.signal(ram, schedule, temp);
if (debugMode)
{
Console.WriteLine("Process " + temp.processID + " complete!");
}
que.enQueue(this);
if (debugMode)
{
Console.WriteLine("Jobs complete? " + pcbQueue.jobsComplete());
}
}
}
public void PopulateInstructionList(RAM ram, PCB pcb)
{
string instruction = "";
int lowerBound = pcb.ramBaseAddress;
int upperBound = lowerBound + (pcb.wordCount * 32);
int instructionsCount = upperBound / 32 - lowerBound / 32;
int count = 1;
if (lowerBound == -1)
{
return;
}
for (int j = lowerBound + 1; j < upperBound - 1; j++)
{
instruction += ram.data[j - 1];
if (count % 32 == 0)
{
instructionList.Add(instruction);
instruction = "";
}
count++;
}
}
public string getCoreDump(PCB pcb, RAM ram)
{
var dumpString = ram.coreDump(pcb.ramBaseAddress, pcb.ramBaseAddress + (pcb.wordCount + pcb.inputBuffer + pcb.outputBuffer + pcb.tempBuffer) * 32);
return(dumpString);
}
public void StartWork(PCB pcb)
{
for (int i = 0; i < instructionList.Count; i++)
{
type = Utility.BinaryToDecimal(instructionList[i].Substring(0, 2));
opcode = Utility.BinaryToDecimal(instructionList[i].Substring(2, 6));
switch (type)
{
//Example Arithmetic Operation that assigns the sum of regS1 and regS2 to regD
//00_000101_0000_0001_0010_000000000000 (without the underscores)
case 0:
//2 bits 0(type) + 6 bits opcode + 4 bits regS1 + 4 bits regS2 + 4 bits regD + 12 bits 0 = 32 bit instruction for Arithmetic
if (debugMode)
{
Console.WriteLine("Performing an ARITHMETIC operation");
}
regS1 = Utility.BinaryToDecimal(instructionList[i].Substring(8, 4));
regS2 = Utility.BinaryToDecimal(instructionList[i].Substring(12, 4));
regD = Utility.BinaryToDecimal(instructionList[i].Substring(16, 4));
ExecuteOPCode(opcode);
break;
case 1:
//2 bits 01(type) + 6 bits opcode + 4 bits regB + 4 bits regD + 16 bits address = 32 bits for Conditional Branch
if (debugMode)
{
Console.WriteLine("Performing a CONDITIONAL BRANCH operation");
}
regB = Utility.BinaryToDecimal(instructionList[i].Substring(8, 4));
regD = Utility.BinaryToDecimal(instructionList[i].Substring(12, 4));
address = Utility.BinaryToDecimal(instructionList[i].Substring(16, 16));
ExecuteOPCode(opcode);
break;
case 2:
//2 bits 10(type) + 6 bits opcode + 24 bits address = 32 bits for Uncondition Jump
if (debugMode)
{
Console.WriteLine("Performing an UNCONDITIONAL JUMP operation");
}
address = Utility.BinaryToDecimal(instructionList[i].Substring(8, 24));
ExecuteOPCode(opcode);
break;
case 3:
//2 bits 11(type) + 6 bits opcode + 4 bits reg1 + 4 bits reg2 + 16 bits address = 32 bits for Input/Output
if (debugMode)
{
Console.WriteLine("Performing an I/O operation");
}
pcb.ioOps++;
reg1 = Utility.BinaryToDecimal(instructionList[i].Substring(8, 4));
reg2 = Utility.BinaryToDecimal(instructionList[i].Substring(12, 4));
address = Utility.BinaryToDecimal(instructionList[i].Substring(16, 16));
ExecuteOPCode(opcode);
break;
default:
break;
}
}
instructionList.Clear();
}
public void signal(RAM ram, Scheduler schedule, PCB pcb) //Deallocates a jobs memory after completion
{
schedule.releaseMem(ram, pcb);
}