Platform and version requirements: Native (1.3)

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

Compares value with expected and replaces it with new value if values matches. Legacy MM: If new value is not null and object is frozen, it must be frozen or permanent object.

Parameters

expected - the expected value

new - the new value

Exceptions

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

Return the old value