+ * Warning, this module is done to be efficient and performs tons of cast and dirty things. So make sure you know what
+ * you are doing while using it.
+ * It is basically a fifo but with restrictions so that it can be used as a set. Any operation (add, remove, belongs)
+ * is O(1) and no call to malloc/free is done.
+ *
+ * @deprecated If you are using C++, you might want to use
+ * `boost::intrusive::set` instead.