Thread Simulation Version 1 (part)

// Processor1.java
// It is a thread class to be run from SimV1
// It receives parameters from the parent, a thread name and ID number


import java.lang.Math;
import java.util.Random;

public class Processor1 extends Thread {
	private int myid;	// private to this thread
	private int cacheindex[] = new int [5];
	private char cachedata[] = new char [5];
	private int i;  //for loop counter
	private int CPUaddress;   // random address requested by CPU
	Random randGen;		// a pointer to a Random generator
	

	Processor1(String name, int me) { //constructor - executed when thread is created with new
	   super(name); //super is part of the Thread class
	   myid=me; 
		randGen = new Random(5);    // seed the random number sequence
	   start(); // by default calls method "run"
	}

	public void run() {
		SimV1.addrbus = 1000;
		SimV1.databus = 'X';
		for (i = 0; i < 5; i++){
		    cacheindex[i] = -1;
	   }
		System.out.println("Howdy from " + Thread.currentThread().getName() + 
		",   id=" + myid + "   addrbus = " + SimV1.addrbus);
		//for (i = 0; i < 5; i++){ System.out.println(cacheindex[i]); }
		for (i = 1; i < 6; i++) {  // controls cycles of CPU>address on bus.
		 CPUaddress = Math.abs(randGen.nextInt()) % 10;  //address between 0 and 9
		 SimV1.addrbus = CPUaddress;  //address on the bus
		 SimV1.databus = '0';         //reset the databus to '0'
		 System.out.println("Update from " + Thread.currentThread().getName() + 
		 ",   id=" + myid + "   addrbus = " + SimV1.addrbus);
		 //Now we wait for memory to respond
		 try { Thread.sleep(500);     //milliseconds
         } catch (InterruptedException e) { return; }//end of try
		 while (SimV1.databus == '0') {
		  		try {Thread.sleep(100);}// wait 1/2 second
               catch (InterruptedException e) {return;} // end of try
	      }  //spin loop waiting for memory to send data
		 System.out.println("  Processor found data: " + SimV1.databus);
	  }//end of address generating for loop
     SimV1.addrbus = -2;  // signal memory thread we are done
	}//end run
} // end class