/pre>
<p>The <code>reinterpret</code> function allows you to take a segment and decorate it with a new size, and possibly associate it with an arena or add cleanup functions on it.</p>
<p>In cases like this where we don’t know the arena of the pointer, we could use <code>reinterpret</code> to ensure it’s freed. For example if a <code>free-vector!</code> function that takes a pointer exists, we could use this:</p>
<pre><code class="language-clojure">(defcfn returns-vector
  "returns_vector" [] ::mem/poin