Function pool_unref

libavutil/refstruct.c:309–314

* Hint: The content of pool_unref() and refstruct_pool_uninit() * could currently be merged; they are only separate functions * in case we would ever introduce weak references. */

 * in case we would ever introduce weak references.
 */
static void pool_unref(void *ref)
{
    AVRefStructPool *pool = get_userdata(ref);
    if (atomic_fetch_sub_explicit(&pool->refcount, 1, memory_order_acq_rel) == 1)
        pool_free(pool);
}

static void refstruct_pool_uninit(AVRefStructOpaque unused, void *obj)
{