Oncelock on rustbiteshttps://www.rustbites.com/tags/oncelock/Recent content in Oncelock on rustbitesHugoenTue, 19 May 2026 09:19:41 +0200149. OnceLock::wait — Block a Thread Until Another One Initializes the Valuehttps://www.rustbites.com/posts/bite-149/Tue, 19 May 2026 08:00:00 +0100https://www.rustbites.com/posts/bite-149/<p>You have one thread loading a config and a handful of workers that can&rsquo;t start until it&rsquo;s ready. <code>OnceLock::wait</code> blocks until the value lands — no <code>Condvar</code>, no <code>Mutex</code>, no spin loop.</p>