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

int __thread i;

void *
foo1(void *arg)
{
        printf("thread %p, &i = %p\n", pthread_self(), &i);
        for (i = 0; i < 10; i++) {
                printf("thread %p, i = %d\n", pthread_self(), i);
                sleep(1);
        }
        return (NULL);
}

void *
foo2(void *arg)
{
        printf("thread %p, &i = %p\n", pthread_self(), &i);
        for (i = 10; i > 0; i--) {
                printf("thread %p, i = %d\n", pthread_self(), i);
                sleep(1);
        }
        return (NULL);
}

int
main(int argc, char** argv)
{
        pthread_t t1, t2;

        pthread_create(&t1, 0, foo1, 0);
        pthread_create(&t2, 0, foo2, 0);
        pthread_join(t1, 0);
        pthread_join(t2, 0);

        return (0);
}