ActualJvm.jvm.kt
/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.compose.runtime
import androidx.compose.runtime.internal.ThreadMap
import androidx.compose.runtime.internal.emptyThreadMap
internal actual typealias AtomicReference<V> = java.util.concurrent.atomic.AtomicReference<V>
internal actual open class ThreadLocal<T> actual constructor(
private val initialValue: () -> T
) : java.lang.ThreadLocal<T>() {
@Suppress("UNCHECKED_CAST")
actual override fun get(): T {
return super.get() as T
}
actual override fun set(value: T) {
super.set(value)
}
override fun initialValue(): T? {
return initialValue.invoke()
}
}
internal actual class SnapshotThreadLocal<T> {
private val map = AtomicReference<ThreadMap>(emptyThreadMap)
private val writeMutex = Any()
@Suppress("UNCHECKED_CAST")
actual fun get(): T? = map.get().get(Thread.currentThread().id) as T?
actual fun set(value: T?) {
val key = Thread.currentThread().id
synchronized(writeMutex) {
val current = map.get()
if (current.trySet(key, value)) return
map.set(current.newWith(key, value))
}
}
}
internal actual fun identityHashCode(instance: Any?): Int = System.identityHashCode(instance)
@PublishedApi
internal actual inline fun <R> synchronized(lock: Any, block: () -> R): R {
return kotlin.synchronized(lock, block)
}
internal actual typealias TestOnly = org.jetbrains.annotations.TestOnly