| // Copyright (c) 2017, the Dart project authors. Please see the AUTHORS |
| // file for details. All rights reserved. Use of this source code is governed |
| // by a BSD-style license that can be found in the LICENSE file. |
| |
| /// @assertion void ping( |
| /// SendPort responsePort, { |
| /// Object response, |
| /// int priority: IMMEDIATE |
| /// }) |
| /// Request that the isolate send response on the responsePort. |
| /// If the isolate is alive, it will eventually send response (defaulting |
| /// to null) on the response port. |
| /// The priority must be one of IMMEDIATE or BEFORE_NEXT_EVENT. The response |
| /// is sent at different times depending on the ping type: |
| /// * IMMEDIATE: The isolate responds as soon as it receives the control |
| /// message. This is after any previous control message from the same isolate |
| /// has been received, but may be during execution of another event. |
| /// * BEFORE_NEXT_EVENT: The response is scheduled for the next time control |
| /// returns to the event loop of the receiving isolate, after the current event, |
| /// and any already scheduled control events, are completed. |
| /// If response cannot be sent to the isolate, then the request is ignored. |
| /// It is recommended to only use simple values that can be sent to all isolates, |
| /// like null, booleans, numbers or strings. |
| /// |
| /// @description Check that isolate sends response null after ping() call with |
| /// given response port and priority IMMEDIATE. The isolate is continuously |
| /// running. |
| /// |
| /// @author a.semenov@unipro.ru |
| |
| import "dart:isolate"; |
| import "dart:math"; |
| import "../../../Utils/expect.dart"; |
| |
| entryPoint(message){ |
| Random random = new Random(); |
| int s = 0; |
| while (true){ |
| s = -s + random.nextInt(100); |
| } |
| } |
| |
| test() async { |
| ReceivePort onExit = new ReceivePort(); |
| Isolate isolate = await Isolate.spawn( |
| entryPoint, |
| null, // message |
| onExit:onExit.sendPort, |
| errorsAreFatal:true |
| ); |
| // check |
| ReceivePort pingPort = new ReceivePort(); |
| isolate.ping(pingPort.sendPort, priority:Isolate.immediate); |
| Expect.isNull(await pingPort.first); |
| // clean up |
| isolate.kill(priority:Isolate.immediate); |
| await onExit.first; |
| asyncEnd(); |
| } |
| |
| main() { |
| asyncStart(); |
| test(); |
| } |