/* 	ELEC 377,  Lab 3
 *
 *  master.c 
 *  Contains the main() function which fork()s all the worker processes (do_convolution()) and then
 * waits for the answers to come back.
 */

#include <stdio.h>
#include <strings.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <stdlib.h>
#include <errno.h>

#include "common.h"

#define FALSE 0
#define TRUE 1


int main (int c, char **v){

	// initialize the shared memory, load in the initial array's, spawn the worker
	// processes.

	key_t   key;
	struct shared    *memptr;
	FILE *inFile;
	int x,i, length, shmid, numReturned;


	/*	 Shared memory init 	*/
	errno = 0;
	key = ftok(".", 'S');
	if((shmid = shmget(key, MEMSIZE, IPC_CREAT|0666)) == -1 ){
		printf("The shared memory already exists.\n");
		if( (shmid = shmget(key, MEMSIZE, 0)) == -1){
			printf("Error allocating shared memory. \n");
			exit(1);
		}
	}

	// now map the region..
	if((int)(memptr = (struct shared *) shmat(shmid, 0, 0)) == -1){
		printf("Couldn't map the memory into our process space.\n");
		perror("foo");
        exit(1);
	}

	for (i = 0; i < MEMSIZE; i++){
	    ((char*)memptr)[i] = 0;
	}

	return 0;
}