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kotlinlang

can anyone help me understand how atomicfu library works?

what does it do under the hood that allows you to mutate something wrapped with `atomic(...)` ?

i understand that the object in `atomic` is frozen, but its unclear to me why it can be mutated.

(also what does `fu` stand for / mean?)

*Atomic*{Integer,Long,Reference}*F*ield*U*pdater, see <https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/atomic/package-summary.html>

on the JVM, the plugin rewrites the output bytecode to use Atomic*FieldUpdater or VarHandle, depending on configuration; on JS, it rewrites the output JS; on native, it wraps the Atomic* types from kotlin.native.concurrent