Leaf Petersen
745f112ef6
Opt an initial batch of files under samples, samples-dev, utils, and runtime/tools/dartfuzz out of null safety in preparation for switching the flag on by default. Change-Id: Icdfd52a5a969e678a7205903332f73fe3841c223 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/166960 Reviewed-by: Daco Harkes <dacoharkes@google.com> Commit-Queue: Leaf Petersen <leafp@google.com>
45 lines
1.2 KiB
Dart
45 lines
1.2 KiB
Dart
// Copyright (c) 2012, 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.
|
|
|
|
// @dart = 2.9
|
|
|
|
library sample_asynchronous_extension;
|
|
|
|
import 'dart:async';
|
|
import 'dart:isolate';
|
|
import 'dart-ext:sample_extension';
|
|
|
|
// A class caches the native port used to call an asynchronous extension.
|
|
class RandomArray {
|
|
static SendPort _port;
|
|
|
|
Future<List<int>> randomArray(int seed, int length) {
|
|
var completer = new Completer<List<int>>();
|
|
var replyPort = new RawReceivePort();
|
|
var args = new List(3);
|
|
args[0] = seed;
|
|
args[1] = length;
|
|
args[2] = replyPort.sendPort;
|
|
_servicePort.send(args);
|
|
replyPort.handler = (result) {
|
|
replyPort.close();
|
|
if (result != null) {
|
|
completer.complete(result);
|
|
} else {
|
|
completer.completeError(new Exception("Random array creation failed"));
|
|
}
|
|
};
|
|
return completer.future;
|
|
}
|
|
|
|
SendPort get _servicePort {
|
|
if (_port == null) {
|
|
_port = _newServicePort();
|
|
}
|
|
return _port;
|
|
}
|
|
|
|
SendPort _newServicePort() native "RandomArray_ServicePort";
|
|
}
|