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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 patch class _IOService { | 5 patch class _IOService { |
| 6 // Lazy initialize service ports, 32 per isolate. | 6 // Lazy initialize service ports, 32 per isolate. |
| 7 static const int _SERVICE_PORT_COUNT = 32; | 7 static const int _SERVICE_PORT_COUNT = 32; |
| 8 static List<SendPort> _servicePort = new List(_SERVICE_PORT_COUNT); | 8 static List<SendPort> _servicePort = new List(_SERVICE_PORT_COUNT); |
| 9 static RawReceivePort _receivePort; | 9 static RawReceivePort _receivePort; |
| 10 static SendPort _replyToPort; | 10 static SendPort _replyToPort; |
| 11 static Map<int, Completer> _messageMap = {}; | 11 static Map<int, Completer> _messageMap = {}; |
| 12 static int _id = 0; | 12 static int _id = 0; |
| 13 | 13 |
| 14 /* patch */ static Future dispatch(int request, List data) { | 14 /* patch */ static Future dispatch(int request, List data) { |
| 15 int id; | 15 int id; |
| 16 do { | 16 do { |
| 17 id = _getNextId(); | 17 id = _getNextId(); |
| 18 } while (_messageMap.containsKey(id)); | 18 } while (_messageMap.containsKey(id)); |
| 19 int index = id % _SERVICE_PORT_COUNT; | 19 int index = id % _SERVICE_PORT_COUNT; |
| 20 _initialize(index); | 20 _initialize(index); |
| 21 var completer = new Completer(); | 21 var completer = new Completer(); |
| 22 _messageMap[id] = completer; | 22 _messageMap[id] = completer; |
| 23 _servicePort[index].send([id, request, data], _replyToPort); | 23 _servicePort[index].send([id, _replyToPort, request, data]); |
| 24 return completer.future; | 24 return completer.future; |
| 25 } | 25 } |
| 26 | 26 |
| 27 static void _initialize(int index) { | 27 static void _initialize(int index) { |
| 28 if (_servicePort[index] == null) { | 28 if (_servicePort[index] == null) { |
| 29 _servicePort[index] = _newServicePort(); | 29 _servicePort[index] = _newServicePort(); |
| 30 } | 30 } |
| 31 if (_receivePort == null) { | 31 if (_receivePort == null) { |
| 32 _receivePort = new RawReceivePort(); | 32 _receivePort = new RawReceivePort(); |
| 33 _replyToPort = _receivePort.sendPort; | 33 _replyToPort = _receivePort.sendPort; |
| 34 _receivePort.handler = (data) { | 34 _receivePort.handler = (data) { |
| 35 assert(data is List && data.length == 2); | 35 assert(data is List && data.length == 2); |
| 36 _messageMap.remove(data[0]).complete(data[1]); | 36 _messageMap.remove(data[0]).complete(data[1]); |
| 37 if (_messageMap.length == 0) { | 37 if (_messageMap.length == 0) { |
| 38 _id = 0; | 38 _id = 0; |
| 39 _receivePort.close(); | 39 _receivePort.close(); |
| 40 _receivePort = null; | 40 _receivePort = null; |
| 41 } | 41 } |
| 42 }; | 42 }; |
| 43 } | 43 } |
| 44 } | 44 } |
| 45 | 45 |
| 46 static int _getNextId() { | 46 static int _getNextId() { |
| 47 if (_id == 0x7FFFFFFF) _id = 0; | 47 if (_id == 0x7FFFFFFF) _id = 0; |
| 48 return _id++; | 48 return _id++; |
| 49 } | 49 } |
| 50 | 50 |
| 51 static SendPort _newServicePort() native "IOService_NewServicePort"; | 51 static SendPort _newServicePort() native "IOService_NewServicePort"; |
| 52 } | 52 } |
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