/**********************************************************
  File:          master.h                         
  Description:   A program that inputes an integer number 
                 and determines if it is a prime number or 
		 not in parallel.
		 The functions for the master process.
                                                         
  Author:        Dana Vrajitoru                          
  Organization:  IUSB                                    
  Date:          August 23, 2002                           
***********************************************************/

#ifndef MASTER_H
#define MASTER_H

// A function that sends the divisor to all of the processes except
// for the master. If the divisor is > 1, this causes all of them to
// stop loop that searches for a divisor. The function also makes sure
// that it only sends the divisor once to each process by the use of
// the static variable count.
void Finalize_all(int nr_proc, int divisor);

// A function that checks if there is any incoming message from any
// slave process. In case there is a message with a non-trivial
// divisor, it stops all of them.
void Check_incoming(int nr_proc, MPI_Request &request, 
		    int &div, int &nr_done, int &divisor);

// The function that checks if n is a prime. While it is testing for
// the divisors between start and end, it also checks if any other
// process has already found a non-trivial divisor, and in this case,
// it stops all of them. It also makes sure there are no pending
// processes waiting to send or receive something.
int Check_prime_master(int nr_proc, int start, int end, int n);

// The master function that inputs the number, finds out if it is a
// prime by coordinating all of the others, then outputs the result.
void Master(int nr_proc);

#endif