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/*
 * Copyright 2010-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
 * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
 */

package kotlin.native.concurrent

/**
 * Marks a top level variable with a backing field or an object as thread local.
 * The object remains mutable and it is possible to change its state,
 * but every thread will have a distinct copy of this object,
 * so changes in one thread are not reflected in another.
 *
 * PLEASE NOTE THAT THIS ANNOTATION MAY GO AWAY IN UPCOMING RELEASES.
 */
@Target(AnnotationTarget.PROPERTY, AnnotationTarget.CLASS)
@Retention(AnnotationRetention.BINARY)
@OptionalExpectation
public expect annotation class ThreadLocal()

/**
 * Marks a top level variable with a backing field or an object as immutable.
 * It is possible to share such object between multiple threads, but it becomes deeply frozen,
 * so no changes can be made to its state or the state of objects it refers to.
 *
 * PLEASE NOTE THAT THIS ANNOTATION MAY GO AWAY IN UPCOMING RELEASES.
 */
@Target(AnnotationTarget.PROPERTY)
@Retention(AnnotationRetention.BINARY)
@OptionalExpectation
public expect annotation class SharedImmutable()