https://www.rustbites.com/tags/unsafecell/Recent content in Unsafecell on rustbitesHugoenFri, 22 May 2026 07:44:11 +0200https://www.rustbites.com/posts/bite-154/Thu, 21 May 2026 17:00:00 +0100https://www.rustbites.com/posts/bite-154/<p>This morning&rsquo;s <a href="https://www.rustbites.com/posts/bite-153/">OnceCell / LazyCell</a> bite — and <code>Cell</code>, <code>RefCell</code>, <code>Mutex</code>, <code>RwLock</code>, <code>OnceLock</code>, every atomic — all bottom out at the same type: <code>UnsafeCell&lt;T&gt;</code>. It is the one and only legal way in Rust to mutate through a shared reference. You&rsquo;ll almost never type its name, but knowing what it does explains why all the rest exist.</p>