public void pageLoad(Disk disk, RAM ram, pcbQueue pcbQueue)
{
//for each pcb load the first 4 pages in RAM
while (pcbQueue.ramIterator < 30)
{
for (int i = 0; i < 4; i++)
{
pageLoadRam(disk, pcbQueue.queue[pcbQueue.ramIterator].pageTable[i], ram);
}
pcbQueue.ramIterator++;
}
}
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 loadRAM(Disk disk, RAM ram, pcbQueue pcbQueue, int i)
{
//Load an individual job from disk to RAM, starting at process disk address and ending at disk address + spaceReq
pcbQueue.queue[i].ramBaseAddress = iterator;
pcbQueue.queue[i].programCounter = iterator;
pcbQueue.queue[i].ramLoadTime = DateTime.Now.TimeOfDay;
pcbQueue.queue[i].inputBufferAddress = pcbQueue.queue[i].ramBaseAddress + pcbQueue.queue[i].wordCount * 32 + 1;
pcbQueue.queue[i].outputBufferAddress = pcbQueue.queue[i].inputBufferAddress + pcbQueue.queue[i].inputBuffer * 32 + 1;
pcbQueue.queue[i].tempBufferAddress = pcbQueue.queue[i].outputBufferAddress + pcbQueue.queue[i].outputBuffer * 32 + 1;
for (int j = pcbQueue.queue[i].diskAddress; j <= pcbQueue.queue[i].diskAddress + pcbQueue.queue[i].spaceReq; j++)
{
ram.data[iterator] = disk.data[j];
iterator++;
}
pcbQueue.ramIterator++; //By the end of this function, the queue's iterator will points to next process to be loaded
}
public Boolean spaceAvailable(int iterator, int spaceReq, RAM ram) //Tells us if space is available starting at position [iterator] up to [iterator+spaceReq]
{
Boolean result = true;
for (int i = iterator; i <= iterator + spaceReq; i++)
{
if (i == 32768 || i < 0) //If we reach the last index of RAM
{
return(result = false);
}
if (ram.data[i] != -1)
{
return(result = false);
}
}
return(result);
}
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 pageLoadRam(Disk disk, page page, RAM ram)
{
int index = ram.getFreeFrame();
if (index == ram.frameList.Length)
{
return; //no available memory
}
page.frameNumber = index;
page.ramBaseAddress = ram.frameList[index].startAddress;
ram.frameList[index].available = false;
int ramPointer = ram.frameList[index].startAddress;
int diskPointer = page.diskBaseAddress;
for (int i = 0; i < 128; i++)
{
ram.data[ramPointer] = disk.data[diskPointer];
ramPointer++;
diskPointer++;
}
page.valid = true;
}
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 requestPageLoad(Disk disk, RAM ram, page page)
{
pageLoadRam(disk, page, ram);
}
public void signal(RAM ram, Scheduler schedule, PCB pcb) //Deallocates a jobs memory after completion
{
schedule.releaseMem(ram, pcb);
}