#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <unistd.h>

long long int i = 0;

static void bye (void)
{
	printf ("Goodbye.\n");
}

void *thread_severity()
{
	while (1) {
		atexit(bye);
		i++;
		if ( i >= 1000000) {
			printf("i is enough.\n");
			return NULL;
		}
	}

	return NULL;
}

int main (void)
{
	pthread_t thread_severity_id, thread_fmtmsg_id;

	pthread_create(&thread_fmtmsg_id, NULL, thread_severity, NULL);

	while(1) {
		if (i >= 500000)
			exit(0);
		usleep(1000);
	}
}