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| 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
| 4 | 4 |
| 5 library glob.stream_pool; | |
| 6 | |
| 7 import 'dart:async'; | 5 import 'dart:async'; |
| 8 | 6 |
| 9 /// A pool of streams whose events are unified and emitted through a central | 7 /// A pool of streams whose events are unified and emitted through a central |
| 10 /// stream. | 8 /// stream. |
| 11 class StreamPool<T> { | 9 class StreamPool<T> { |
| 12 /// The stream through which all events from streams in the pool are emitted. | 10 /// The stream through which all events from streams in the pool are emitted. |
| 13 Stream<T> get stream => _controller.stream; | 11 Stream<T> get stream => _controller.stream; |
| 14 final StreamController<T> _controller; | 12 final StreamController<T> _controller; |
| 15 | 13 |
| 16 /// Subscriptions to the streams that make up the pool. | 14 /// Subscriptions to the streams that make up the pool. |
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| 67 _subscriptions.clear(); | 65 _subscriptions.clear(); |
| 68 _controller.close(); | 66 _controller.close(); |
| 69 } | 67 } |
| 70 | 68 |
| 71 /// The next time this pool becomes empty, close it. | 69 /// The next time this pool becomes empty, close it. |
| 72 void closeWhenEmpty() { | 70 void closeWhenEmpty() { |
| 73 if (_subscriptions.isEmpty) close(); | 71 if (_subscriptions.isEmpty) close(); |
| 74 _closeWhenEmpty = true; | 72 _closeWhenEmpty = true; |
| 75 } | 73 } |
| 76 } | 74 } |
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