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

#define N		56
static unsigned long *counter[N];

static void sigint(int __attribute__((unused)) sig)
{
	unsigned i;
	unsigned long sum = 0;
	for (i = 0; i < N; i++) {
		sum += *counter[i];
	}
	printf("spinned: %lu\n", sum);
	exit(0);
}

static void *spinner(void *ip)
{
	volatile unsigned long *i = ip;
	while (1) {
		(*i)++;
	}
	return NULL;
}

int main(void)
{
	unsigned i;
	for (i = 0; i < N; i++) {
		if (!(counter[i] = malloc(256))) perror("malloc"), exit(1);
	}
	for (i = 1; i < N; i++) {
		pthread_t th;
		pthread_create(&th, NULL, spinner, counter[i]);
	}
	signal(SIGINT, sigint);
	spinner(counter[0]);
	return 0;
}