Function dequeue

src/tscore/llqueue.cc:182–211

}

void *
dequeue(LLQ *Q)
{
  LLQrec *rec;
  void   *d;
  ink_sem_wait(&(Q->sema));
  ink_mutex_acquire(&(Q->mux));

  if (Q->head == nullptr) {
    ink_mutex_release(&(Q->mux));

    return nullptr;
  }

  rec = Q->head;

  Q->head = Q->head->next;
  if (Q->head == nullptr) {
    Q->tail = nullptr;
  }

  d = rec->data;
  // freerec(Q, rec);
  ats_free(rec);

  Q->len--;
  ink_mutex_release(&(Q->mux));

  return d;
}

#ifdef LLQUEUE_MAIN