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1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2015, 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 import "dart:_internal" hide Symbol; | 5 import "dart:_internal" hide Symbol; |
6 | 6 |
7 // Equivalent of calling FATAL from C++ code. | 7 // Equivalent of calling FATAL from C++ code. |
8 _fatal(msg) native "DartAsync_fatal"; | 8 _fatal(msg) native "DartAsync_fatal"; |
9 | 9 |
10 // We need to pass the value as first argument and leave the second and third | 10 // We need to pass the value as first argument and leave the second and third |
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38 if (Zone.current == Zone.ROOT) return errorCallback; | 38 if (Zone.current == Zone.ROOT) return errorCallback; |
39 return Zone.current.registerBinaryCallback(errorCallback); | 39 return Zone.current.registerBinaryCallback(errorCallback); |
40 } | 40 } |
41 | 41 |
42 /// Registers the [thenCallback] and [errorCallback] on the given [object]. | 42 /// Registers the [thenCallback] and [errorCallback] on the given [object]. |
43 /// | 43 /// |
44 /// If [object] is not a future, then it is wrapped into one. | 44 /// If [object] is not a future, then it is wrapped into one. |
45 /// | 45 /// |
46 /// Returns the result of registering with `.then`. | 46 /// Returns the result of registering with `.then`. |
47 Future _awaitHelper( | 47 Future _awaitHelper( |
48 var object, Function thenCallback, Function errorCallback, var awaiter) { | 48 var object, |
| 49 Function thenCallback, |
| 50 Function errorCallback, |
| 51 var awaiter) { |
49 if (object is! Future) { | 52 if (object is! Future) { |
50 object = new _Future().._setValue(object); | 53 object = new _Future().._setValue(object); |
51 } else if (object is! _Future) { | 54 } else if (object is! _Future) { |
52 return object.then(thenCallback, onError: errorCallback); | 55 return object.then(thenCallback, onError: errorCallback); |
53 } | 56 } |
54 // `object` is a `_Future`. | 57 // `object` is a `_Future`. |
55 // | 58 // |
56 // Since the callbacks have been registered in the current zone (see | 59 // Since the callbacks have been registered in the current zone (see |
57 // [_asyncThenWrapperHelper] and [_asyncErrorWrapperHelper]), we can avoid | 60 // [_asyncThenWrapperHelper] and [_asyncErrorWrapperHelper]), we can avoid |
58 // another registration and directly invoke the no-zone-registration `.then`. | 61 // another registration and directly invoke the no-zone-registration `.then`. |
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169 close() { | 172 close() { |
170 if ((cancellationCompleter != null) && !cancellationCompleter.isCompleted) { | 173 if ((cancellationCompleter != null) && !cancellationCompleter.isCompleted) { |
171 // If the stream has been cancelled, complete the cancellation future | 174 // If the stream has been cancelled, complete the cancellation future |
172 // with the error. | 175 // with the error. |
173 cancellationCompleter.complete(); | 176 cancellationCompleter.complete(); |
174 } | 177 } |
175 controller.close(); | 178 controller.close(); |
176 } | 179 } |
177 | 180 |
178 _AsyncStarStreamController(this.asyncStarBody) { | 181 _AsyncStarStreamController(this.asyncStarBody) { |
179 controller = new StreamController( | 182 controller = new StreamController(onListen: this.onListen, |
180 onListen: this.onListen, | 183 onResume: this.onResume, |
181 onResume: this.onResume, | 184 onCancel: this.onCancel); |
182 onCancel: this.onCancel); | |
183 } | 185 } |
184 | 186 |
185 onListen() { | 187 onListen() { |
186 assert(!onListenReceived); | 188 assert(!onListenReceived); |
187 onListenReceived = true; | 189 onListenReceived = true; |
188 scheduleGenerator(); | 190 scheduleGenerator(); |
189 } | 191 } |
190 | 192 |
191 onResume() { | 193 onResume() { |
192 if (isSuspendedAtYield) { | 194 if (isSuspendedAtYield) { |
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204 // Cancellation does not affect an async generator that is | 206 // Cancellation does not affect an async generator that is |
205 // suspended at an await. | 207 // suspended at an await. |
206 if (isSuspendedAtYield) { | 208 if (isSuspendedAtYield) { |
207 scheduleGenerator(); | 209 scheduleGenerator(); |
208 } | 210 } |
209 } | 211 } |
210 return cancellationCompleter.future; | 212 return cancellationCompleter.future; |
211 } | 213 } |
212 } | 214 } |
213 | 215 |
214 @patch | 216 @patch void _rethrow(Object error, StackTrace stackTrace) native "Async_rethrow"
; |
215 void _rethrow(Object error, StackTrace stackTrace) native "Async_rethrow"; | |
216 | 217 |
217 @patch | 218 @patch class _Future<T> { |
218 class _Future<T> { | |
219 /// The closure implementing the async[*]-body that is `await`ing this future. | 219 /// The closure implementing the async[*]-body that is `await`ing this future. |
220 Function _awaiter; | 220 Function _awaiter; |
221 } | 221 } |
222 | 222 |
223 @patch | 223 @patch class _StreamImpl<T> { |
224 class _StreamImpl<T> { | |
225 /// The closure implementing the async[*]-body that is `await`ing this future. | 224 /// The closure implementing the async[*]-body that is `await`ing this future. |
226 Function _awaiter; | 225 Function _awaiter; |
227 | |
228 /// The closure implementing the async-generator body that is creating events | 226 /// The closure implementing the async-generator body that is creating events |
229 /// for this stream. | 227 /// for this stream. |
230 Function _generator; | 228 Function _generator; |
231 } | 229 } |
232 | 230 |
233 /// Returns a [StackTrace] object containing the synchronous prefix for this | 231 /// Returns a [StackTrace] object containing the synchronous prefix for this |
234 /// asynchronous method. | 232 /// asynchronous method. |
235 Object _asyncStackTraceHelper() native "StackTrace_asyncStackTraceHelper"; | 233 Object _asyncStackTraceHelper() |
| 234 native "StackTrace_asyncStackTraceHelper"; |
236 | 235 |
237 void _clearAsyncThreadStackTrace() | 236 void _clearAsyncThreadStackTrace() |
238 native "StackTrace_clearAsyncThreadStackTrace"; | 237 native "StackTrace_clearAsyncThreadStackTrace"; |
239 | 238 |
240 void _setAsyncThreadStackTrace(StackTrace stackTrace) | 239 void _setAsyncThreadStackTrace(StackTrace stackTrace) native |
241 native "StackTrace_setAsyncThreadStackTrace"; | 240 "StackTrace_setAsyncThreadStackTrace"; |
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