Process Management

Process Management

#include "stdafx.h"

#include <iostream>

using namespace std;

class Process

{

private:

      int state, pid;

public:

      Process()

      {

            state=0;

            pid=100;

      }

      Process(int s, int p):state(s),pid(p){}

      void New()

      {

            state=0;

            cout<<"Process is in state: "<<state;

            cout<<"Process is being created \n resource are being initialized \n";

            for(int i=0; i<100; i++)

                  cout<<".";

            cout<<"Process is created and about to load\n";

            ready();

      }

      void ready()

      {

            state=1;

            cout<<"Process is in state: "<<state;

            cout<<"Process is in main memory and waiting for cpu \n";

            for(int i=0; i<100; i++)

                  cout<<".";

            cout<<"\n Process is about to dispatch \n";

            running();

      }

      void running()

      {

            state=2;

            cout<<"Process is in state: "<<state;

            cout<<"Process is in cpu and instruction are being executed \n";

            for(int i=0; i<100; i++)

                  cout<<".";

            char choice;

            cout<<"\n Press i for interupt, w for waiting, and t for termination \n";

            cin>>choice;

            switch (choice)

            {

            case'i':

                  cout<<"Process is interupted \n";

                  ready();

                  break;

            case'w':

                  cout<<"Process need I/O or event \n";

                  waiting();

                  break;

            case't':

                  cout<<"Process is about to finish \n";

                  terminate();

                  break;

            default:

                  cout<<"Wrong choice \n";

                  terminate();

            }

      }

      void waiting()

      {

            state=3;

            cout<<"Process is in state: "<<state;

            cout<<"Process is in waiting queue and needs service \n";

            for(int i=0; i<100; i++)

                  cout<<".";

            cout<<"\n Process is serviced \n";

            ready();

      }

      void terminate()

      {

            state=4;

            cout<<"Process is in state: "<<state;

            cout<<"\n Resoyrce are being deallocated \n";

            for(int i=0; i<100; i++)

                  cout<<".";

            cout<<"\n Process terminated Successfully \n";

      }

};

int _tmain(int argc, _TCHAR* argv[])

{

      Process myprocess;

      myprocess.New();

      return 0;

}