1 /*
2  * Copyright (C) 2024 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package com.example.tracing.demo.experiments
17 
18 import com.android.app.tracing.coroutines.launchTraced as launch
19 import com.example.tracing.demo.Default
20 import com.example.tracing.demo.FixedThreadA
21 import com.example.tracing.demo.FixedThreadB
22 import com.example.tracing.demo.FixedThreadC
23 import com.example.tracing.demo.IO
24 import javax.inject.Inject
25 import javax.inject.Singleton
26 import kotlinx.coroutines.CoroutineDispatcher
27 import kotlinx.coroutines.coroutineScope
28 
29 @Singleton
30 class LaunchNested
31 @Inject
32 constructor(
33     @FixedThreadA private var dispatcherA: CoroutineDispatcher,
34     @FixedThreadB private var dispatcherB: CoroutineDispatcher,
35     @FixedThreadC private val dispatcherC: CoroutineDispatcher,
36     @Default private var defaultContext: CoroutineDispatcher,
37     @IO private var ioContext: CoroutineDispatcher,
38 ) : Experiment {
39     override val description: String = "launch{launch{launch{launch{}}}}"
40 
<lambda>null41     override suspend fun start(): Unit = coroutineScope {
42         launch("launch(threadA)", dispatcherA) {
43             forceSuspend("A", 250)
44             launch("launch(threadB)", dispatcherB) {
45                 forceSuspend("B", 250)
46                 launch("launch(threadC)", dispatcherC) {
47                     forceSuspend("C", 250)
48                     launch("launch(Dispatchers.Default)", defaultContext) {
49                         forceSuspend("D", 250)
50                         launch("launch(Dispatchers.IO)", ioContext) { forceSuspend("E", 250) }
51                     }
52                 }
53             }
54         }
55     }
56 }
57