https://madhavkhoslaa.github.io/tags/x86/Recent content in X86 on Madhav KhoslaHugoen© Madhav KhoslaSun, 20 Sep 2026 12:00:00 +0530https://madhavkhoslaa.github.io/posts/mutex-atomic/Sun, 20 Sep 2026 12:00:00 +0530https://madhavkhoslaa.github.io/posts/mutex-atomic/<h2 id="mutex-what-is-it">Mutex, What is it?</h2> <h3 id="example-1">Example 1</h3> <p>Imagine two people updating the same number on a whiteboard. The number is 0 and both have to increment it by 1.</p> <p>The answer should be 2. But what if both read 0 before either writes anything? Both calculate 1. Both write 1.</p> <p>So the important thing is not just how we increment the number. It is <strong>who gets to update it right now</strong>.</p>