#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdlib.h>
#include <stdio.h>
#include"sound.h"
#include<stdio.h>
#include<sys/shm.h>
#include<time.h>
#include<signal.h>

#define TIME_MEM_KEY 99
#define SEG_SIZE ((size_t) 10)
#define oops(m,x) {perror(m); exit(x);}


	int seg_id;

int main(int argc,char **argv)
{
	int rem_1 = 0;
	int rem_2 = 0;
	int rem_3 = 0;
	int flag = 0;

	int *mem_ptr;
	
	void close_shm();
	
	    signal( SIGINT, (void*) close_shm);							//׽ctrl+c ź
	seg_id = shmget(TIME_MEM_KEY, SEG_SIZE, IPC_CREAT|0777);
	if ( seg_id == -1)
		oops("shmget", 1);

	mem_ptr = shmat( seg_id, NULL, 0);
	if( mem_ptr == (void *) -1)
		oops("shmat", 2);

	while(1)
	{
		rem_1 = rem_2;
		rem_2 = rem_3;
		rem_3 = sound();

		if( rem_1 + rem_2 + rem_3 > 2)
			flag = 1;
		if( rem_1 + rem_2 + rem_3 < 2)
			flag = 0;
	//printf("%d\n", flag);
	
	//strcpy(mem_ptr, flag);
	*mem_ptr = flag;
	printf("%d\n", *mem_ptr);
	}
	
	shmctl( seg_id, IPC_RMID, NULL);
	return flag;
}

void close_shm()
{
	shmctl( seg_id, IPC_RMID, NULL);
	exit(0);
}