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

#define LOOPS 1024
#define WASTE_TIME (1 << 18)

typedef void *(*create_func)(void *);
typedef void (*cleanup_func)(void *);

void cleanup_function()
{
    puts("Ladies and gentlemen, Elvis has left the building.");
}

void *child_function()
{
    int i;

    pthread_cleanup_push((cleanup_func)cleanup_function, NULL);
    for (i = 0; i < LOOPS; i++)
    {
        printf("And a %d,\n", i);
        pthread_testcancel();
    }
    pthread_cleanup_pop(0);
    puts("Hit it!");
    return NULL;
}

int main(int argc, char *argv[])
{
    int sum, i;
    pthread_t child_thread;

	sum = 0;

    pthread_create(&child_thread, NULL, (create_func)child_function, NULL);
    puts("I think I'll waste a little time.  Do you mind?");
    for (i = 0; i < WASTE_TIME; i++)
    {
        sum += i;
    }


    pthread_cancel(child_thread);
    return EXIT_SUCCESS;
}