| /* |
| * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license. |
| */ |
| |
| // This file was automatically generated from composing-suspending-functions.md by Knit tool. Do not edit. |
| package kotlinx.coroutines.guide.exampleCompose04 |
| |
| import kotlinx.coroutines.* |
| import kotlin.system.* |
| |
| // note that we don't have `runBlocking` to the right of `main` in this example |
| fun main() { |
| val time = measureTimeMillis { |
| // we can initiate async actions outside of a coroutine |
| val one = somethingUsefulOneAsync() |
| val two = somethingUsefulTwoAsync() |
| // but waiting for a result must involve either suspending or blocking. |
| // here we use `runBlocking { ... }` to block the main thread while waiting for the result |
| runBlocking { |
| println("The answer is ${one.await() + two.await()}") |
| } |
| } |
| println("Completed in $time ms") |
| } |
| |
| fun somethingUsefulOneAsync() = GlobalScope.async { |
| doSomethingUsefulOne() |
| } |
| |
| fun somethingUsefulTwoAsync() = GlobalScope.async { |
| doSomethingUsefulTwo() |
| } |
| |
| suspend fun doSomethingUsefulOne(): Int { |
| delay(1000L) // pretend we are doing something useful here |
| return 13 |
| } |
| |
| suspend fun doSomethingUsefulTwo(): Int { |
| delay(1000L) // pretend we are doing something useful here, too |
| return 29 |
| } |