kotlin.concurrent.Thread.kt Maven / Gradle / Ivy
/*
* 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.
*/
@file:JvmName("ThreadsKt")
package kotlin.concurrent
/**
* Creates a thread that runs the specified [block] of code.
*
* @param start if `true`, the thread is immediately started.
* @param isDaemon if `true`, the thread is created as a daemon thread. The Java Virtual Machine exits when
* the only threads running are all daemon threads.
* @param contextClassLoader the class loader to use for loading classes and resources in this thread.
* @param name the name of the thread.
* @param priority the priority of the thread.
*/
public fun thread(
start: Boolean = true,
isDaemon: Boolean = false,
contextClassLoader: ClassLoader? = null,
name: String? = null,
priority: Int = -1,
block: () -> Unit
): Thread {
val thread = object : Thread() {
public override fun run() {
block()
}
}
if (isDaemon)
thread.isDaemon = true
if (priority > 0)
thread.priority = priority
if (name != null)
thread.name = name
if (contextClassLoader != null)
thread.contextClassLoader = contextClassLoader
if (start)
thread.start()
return thread
}
/**
* Gets the value in the current thread's copy of this
* thread-local variable or replaces the value with the result of calling
* [default] function in case if that value was `null`.
*
* If the variable has no value for the current thread,
* it is first initialized to the value returned
* by an invocation of the [ThreadLocal.initialValue] method.
* Then if it is still `null`, the provided [default] function is called and its result
* is stored for the current thread and then returned.
*/
@kotlin.internal.InlineOnly
public inline fun ThreadLocal.getOrSet(default: () -> T): T {
return get() ?: default().also(this::set)
}