1/* 2 * Copyright (c) 2025 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16// 并发函数中使用自定义类或函数 17// 并发函数中使用自定义类或函数时需定义在不同文件，否则会被认为是闭包，如下例所示。 18import { taskpool } from '@kit.ArkTS'; 19import { BusinessError } from '@kit.BasicServicesKit'; 20import { testAdd, MyTestA, MyTestB } from './Test'; 21 22function add(arg: number) { 23 return ++arg; 24} 25 26class TestA { 27 constructor(name: string) { 28 this.name = name; 29 } 30 name: string = 'ClassA'; 31} 32 33class TestB { 34 static nameStr: string = 'ClassB'; 35} 36 37@Concurrent 38function testFunc() { 39 // case1：在并发函数中直接调用同文件内定义的类或函数 40 41 // 直接调用同文件定义的函数add()，add飘红报错： 42 // Only imported variables and local variables can be used in @Concurrent decorated functions. <ArkTSCheck> 43 // add(1); 44 // 直接使用同文件定义的TestA构造，TestA飘红报错： 45 // Only imported variables and local variables can be used in @Concurrent decorated functions. <ArkTSCheck> 46 // let a = new TestA('aaa'); 47 // 直接访问同文件定义的TestB的成员nameStr，TestB飘红报错： 48 // Only imported variables and local variables can be used in @Concurrent decorated functions. <ArkTSCheck> 49 // console.info('TestB name is: ' + TestB.nameStr); 50 51 // case2：在并发函数中调用定义在Test.ets文件并导入当前文件的类或函数 52 53 // 输出结果：res1 is: 2 54 console.info('res1 is: ' + testAdd(1)); 55 let tmpStr = new MyTestA('TEST A'); 56 // 输出结果：res2 is: TEST A 57 console.info('res2 is: ' + tmpStr.name); 58 // 输出结果：res3 is: MyTestB 59 console.info('res3 is: ' + MyTestB.nameStr); 60} 61 62 63@Entry 64@Component 65struct Index { 66 @State message: string = 'Hello World'; 67 68 build() { 69 RelativeContainer() { 70 Text(this.message) 71 .id('HelloWorld') 72 .fontSize(50) 73 .fontWeight(FontWeight.Bold) 74 .alignRules({ 75 center: { anchor: '__container__', align: VerticalAlign.Center }, 76 middle: { anchor: '__container__', align: HorizontalAlign.Center } 77 }) 78 .onClick(() => { 79 let task = new taskpool.Task(testFunc); 80 taskpool.execute(task).then(() => { 81 console.info('taskpool: execute task success!'); 82 }).catch((e:BusinessError) => { 83 console.error(`taskpool: execute: Code: ${e.code}, message: ${e.message}`); 84 }) 85 this.message = 'success'; 86 }) 87 } 88 .height('100%') 89 .width('100%') 90 } 91} 92