fun compareAndSwap(expected: T, new: T): T
Compares value with expected and replaces it with new value if values matches. Note that comparison is identity-based, not value-based. If new value is not null, it must be frozen or permanent object.
expected - the expected value
new - the new value
InvalidMutabilityException - if the value is not frozen or a permanent object
Return the old value
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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.native.concurrent/-atomic-reference/compare-and-swap.html