xref: /aosp_15_r20/external/kotlinx.coroutines/kotlinx-coroutines-core/jvm/test/guide/example-sync-03.kt (revision 7a7160fed73afa6648ef8aa100d4a336fe921d9a) 
1 // This file was automatically generated from shared-mutable-state-and-concurrency.md by Knit tool. Do not edit.
2 package kotlinx.coroutines.guide.exampleSync03
3 
4 import kotlinx.coroutines.*
5 import java.util.concurrent.atomic.*
6 import kotlin.system.*
7 
massiveRunnull8 suspend fun massiveRun(action: suspend () -> Unit) {
9     val n = 100  // number of coroutines to launch
10     val k = 1000 // times an action is repeated by each coroutine
11     val time = measureTimeMillis {
12         coroutineScope { // scope for coroutines
13             repeat(n) {
14                 launch {
15                     repeat(k) { action() }
16                 }
17             }
18         }
19     }
20     println("Completed ${n * k} actions in $time ms")
21 }
22 
23 val counter = AtomicInteger()
24 
<lambda>null25 fun main() = runBlocking {
26     withContext(Dispatchers.Default) {
27         massiveRun {
28             counter.incrementAndGet()
29         }
30     }
31     println("Counter = $counter")
32 }
33