libuv QUEUE

#include "include/uv.h"
#include "src/queue.h"
#include <stdio.h>
#include <stdlib.h>

QUEUE wq;

struct foobar {
    int a;
    QUEUE q;
};

typedef struct foobar foobar_t;

foobar_t*
foobar_new() {
    foobar_t* f = malloc(sizeof (foobar_t));
    f->a = -1;
    QUEUE_INIT(&(f->q));
    return f;
}

int main() {
    foobar_t* f;
    int i;
    QUEUE* head;

    QUEUE_INIT(&wq);

    for (i = 0; i < 10; i++) {
        f = foobar_new();
        f->a = i;
        QUEUE_INSERT_TAIL(&wq, &f->q);
    }

    while (!QUEUE_EMPTY(&wq)) {
        f = QUEUE_DATA(wq, foobar_t, q);
        printf("%d\n", f->a);   /* This prints incorrect values */
        head = QUEUE_HEAD(&wq);
        QUEUE_REMOVE(head);
    }

    return 0;
}