kotlin-stdlib/kotlin.native.concurrent/AtomicReference/compareAndSwap

compareAndSwap

external fun compareAndSwap(expected: T, new: T): T(source)

Compares value with expected and replaces it with new value if values matches. Note that comparison is identity-based, not value-based.

Legacy MM: if new value is not null, it must be frozen or permanent object.

Since Kotlin

1.3

Return

the old value

Parameters

expected

the expected value

new

the new value

Throws

with legacy MM if the value is not frozen or a permanent object