hausner@google.com
312c13be73
Review URL: https://codereview.chromium.org//336903003 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@37335 260f80e4-7a28-3924-810f-c04153c831b5
53 lines
1.6 KiB
Dart
53 lines
1.6 KiB
Dart
// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import "dart:async";
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import "dart:isolate";
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// This type corresponds to the VM-internal class LibraryPrefix.
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class _LibraryPrefix {
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bool _load() native "LibraryPrefix_load";
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bool _invalidateDependentCode()
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native "LibraryPrefix_invalidateDependentCode";
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loadLibrary() {
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var completer = _outstandingLoadRequests[this];
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if (completer != null) {
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return completer.future;
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}
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completer = new Completer<bool>();
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_outstandingLoadRequests[this] = completer;
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Timer.run(() {
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var hasCompleted = this._load();
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// Loading can complete immediately, for example when the same
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// library has been loaded eagerly or through another deferred
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// prefix. If that is the case, we must invalidate the dependent
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// code and complete the future now since there will be no callback
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// from the VM.
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if (hasCompleted) {
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_invalidateDependentCode();
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completer.complete(true);
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_outstandingLoadRequests.remove(this);
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}
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});
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return completer.future;
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}
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}
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var _outstandingLoadRequests = new Map<_LibraryPrefix, Completer>();
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// Called from the VM when all outstanding load requests have
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// finished.
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_completeDeferredLoads() {
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var lenghth = _outstandingLoadRequests;
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_outstandingLoadRequests.forEach((prefix, completer) {
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prefix._invalidateDependentCode();
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completer.complete(true);
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});
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_outstandingLoadRequests.clear();
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}
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