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Discover how to browse and search Docker Hub's extensive resources.

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Minimal frontend extension tutorial

The register() method of FinalizationRegistry instances registers a value with this FinalizationRegistry so that if the value is garbage-collected, the registry's callback may get called.

The unregister() method of FinalizationRegistry instances unregisters a target value from this FinalizationRegistry.

The Atomics.compareExchange() static method exchanges a given replacement value at a given position in the array, if a given expected value equals the old value. It returns the old value at that position whether it was equal to the expected value or not. This atomic operation guarantees that no other write happens until the modified value is written back.

The Atomics.wait() static method verifies that a shared memory location contains a given value and if so sleeps, awaiting a wake-up notification or a time out. It returns a string which is "not-equal" if the memory location does not match the given value, "ok" if woken by Atomics.notify(), or "timed-out" if the timeout expires.

Known limitations and platform-specific considerations for Enhanced Container Isolation