From the course: React: Web Workers
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Atomic operations for efficient data sharing - React.js Tutorial
From the course: React: Web Workers
Atomic operations for efficient data sharing
- [Instructor] Atomic operation is not just about basic increments or decrements. They offer a range of powerful features for managing concurrency in complex scenarios. Let's explore some advanced atomic operation and how they can be used effectively. We've already seen the basic Atomics.add, but let's dive into more advanced functions, Atomics.compareExchange and Atomics.load. First, we use Atomics.load(sharedArray, index) to safely load the value at a specific index in the shared memory. Atomics.load ensures that the value is read in a consistent and thread-safe manner. Then Atomics.compareExchange checks whether the value at the given index matches old value. If the values are equal, it atomically updates the value to old value plus one. This ensures that no other worker can modify the value during this check and update operation. If successful, it updates the value and logs value was updated. Otherwise, it logs that the value wasn't updated. Visualize this like a race condition…
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