/// <summary>
/// Constructor for process control block with construction flags
/// </summary>
/// <param name="flags"> flags to use to construct this PCB</param>
public ProcessControlBlock(PCBFlags flags)
{
this.CPUID = flags.CPUID;
this.OSID = flags.OSID;
this.processID = flags.processID;
this.ProcessName = flags.processName;
this.processState = flags.processState;
this.programName = flags.programName;
this.baseAddress = flags.baseAddress;
this.startAddress = flags.startAddress;
this.processPriority = flags.processPriority;
this.avgBurstTime = flags.avgBurstTime;
this.avgWaitingTime = flags.avgWaitingTime;
this.resourceStarved = flags.resourceStarved;
if (flags.allocatedResources == null)
{
this.allocatedResources = new List <SimulatorResource>();
}
else
{
this.allocatedResources = flags.allocatedResources;
}
if (flags.requestedResources == null)
{
this.allocatedResources = new List <SimulatorResource>();
}
else
{
this.allocatedResources = flags.allocatedResources;
}
this.specialRegisters = flags.specialRegisters;
this.registers = flags.registers;
this.lifetimeMills = flags.lifetimeMills;
}
/// <summary>
/// This function creates the flags required to construct a PCB (Process Control Block)
/// </summary>
/// <param name="currentProcess"> a reference to the process that the PCB will belong to</param>
/// <returns> a struct containing the flags to create a PCB or null if an error occurred</returns>
private PCBFlags?CreatePCBFlags(ref SimulatorProcess currentProcess)
{
//SimulatorProcess currentProcess = waitingQueue.Peek();
PCBFlags flags = new PCBFlags();
flags.CPUID = currentProcess.CPUID;
flags.OSID = currentProcess.OSID;
flags.allocatedResources = currentProcess.AllocatedResources;
flags.avgBurstTime = 0;
flags.avgWaitingTime = 0; //TODO calculate correct values
flags.baseAddress = currentProcess.Program.BaseAddress;
flags.proceessMemory = currentProcess.ProcessMemory;
flags.processID = currentProcess.ProcessID;
flags.processName = currentProcess.ProcessName;
flags.processPriority = currentProcess.ProcessPriority;
flags.CPUID = 0; //TODO Change this once multiple CPU's are implemented
flags.processState = currentProcess.CurrentState;
flags.programName = currentProcess.ProgramName;
flags.requestedResources = currentProcess.RequestedResources;
flags.resourceStarved = currentProcess.ResourceStarved;
flags.startAddress = currentProcess.Program.BaseAddress; // TODO Implement program start address
flags.lifetimeMills = (int)(currentProcess.ProcessLifetime - lifetime.ElapsedMilliseconds);
flags.registers = new Register[21];
for (int i = 0; i < flags.registers.Length; i++)
{
string registerName = String.Empty;
if (i < 10)
{
registerName = "R0" + i;
}
else
{
registerName = "R" + i;
}
flags.registers[i] = Register.FindRegister(registerName);
}
flags.specialRegisters = new SpecialRegister[7];
flags.specialRegisters[0] = SpecialRegister.PC;
flags.specialRegisters[1] = SpecialRegister.BR;
flags.specialRegisters[2] = SpecialRegister.SP;
flags.specialRegisters[3] = SpecialRegister.IR;
flags.specialRegisters[4] = SpecialRegister.SR;
flags.specialRegisters[5] = SpecialRegister.MAR;
flags.specialRegisters[6] = SpecialRegister.MDR;
return(flags);
}