Revert "Unify dart:isolate."

lib/isolate/dart2js/messages.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.
+
+// Defines message visitors, serialization, and deserialization.
+
+/** Serialize [message] (or simulate serialization). */
+_serializeMessage(message) {
+  if (_globalState.needSerialization) {
+    return new _JsSerializer().traverse(message);
+  } else {
+    return new _JsCopier().traverse(message);
+  }
+}
+
+/** Deserialize [message] (or simulate deserialization). */
+_deserializeMessage(message) {
+  if (_globalState.needSerialization) {
+    return new _JsDeserializer().deserialize(message);
+  } else {
+    // Nothing more to do.
+    return message;
+  }
+}
+
+class _JsSerializer extends _Serializer {
+
+  _JsSerializer() : super() { _visited = new _JsVisitedMap(); }
+
+  visitSendPort(SendPort x) {
+    if (x is _NativeJsSendPort) return visitNativeJsSendPort(x);
+    if (x is _WorkerSendPort) return visitWorkerSendPort(x);
+    if (x is _BufferingSendPort) return visitBufferingSendPort(x);
+    throw "Illegal underlying port $x";
+  }
+
+  visitNativeJsSendPort(_NativeJsSendPort port) {
+    return ['sendport', _globalState.currentManagerId,
+        port._isolateId, port._receivePort._id];
+  }
+
+  visitWorkerSendPort(_WorkerSendPort port) {
+    return ['sendport', port._workerId, port._isolateId, port._receivePortId];
+  }
+
+  visitBufferingSendPort(_BufferingSendPort port) {
+    if (port._port != null) {
+      return visitSendPort(port._port);
+    } else {
+      // TODO(floitsch): Use real exception (which one?).
+      throw
+          "internal error: must call _waitForPendingPorts to ensure all"
+          " ports are resolved at this point.";
+    }
+  }
+
+}
+
+
+class _JsCopier extends _Copier {
+
+  _JsCopier() : super() { _visited = new _JsVisitedMap(); }
+
+  visitSendPort(SendPort x) {
+    if (x is _NativeJsSendPort) return visitNativeJsSendPort(x);
+    if (x is _WorkerSendPort) return visitWorkerSendPort(x);
+    if (x is _BufferingSendPort) return visitBufferingSendPort(x);
+    throw "Illegal underlying port $p";
+  }
+
+  SendPort visitNativeJsSendPort(_NativeJsSendPort port) {
+    return new _NativeJsSendPort(port._receivePort, port._isolateId);
+  }
+
+  SendPort visitWorkerSendPort(_WorkerSendPort port) {
+    return new _WorkerSendPort(
+        port._workerId, port._isolateId, port._receivePortId);
+  }
+
+  SendPort visitBufferingSendPort(_BufferingSendPort port) {
+    if (port._port != null) {
+      return visitSendPort(port._port);
+    } else {
+      // TODO(floitsch): Use real exception (which one?).
+      throw
+          "internal error: must call _waitForPendingPorts to ensure all"
+          " ports are resolved at this point.";
+    }
+  }
+
+}
+
+class _JsDeserializer extends _Deserializer {
+
+  SendPort deserializeSendPort(List x) {
+    int managerId = x[1];
+    int isolateId = x[2];
+    int receivePortId = x[3];
+    // If two isolates are in the same manager, we use NativeJsSendPorts to
+    // deliver messages directly without using postMessage.
+    if (managerId == _globalState.currentManagerId) {
+      var isolate = _globalState.isolates[isolateId];
+      if (isolate == null) return null; // Isolate has been closed.
+      var receivePort = isolate.lookup(receivePortId);
+      return new _NativeJsSendPort(receivePort, isolateId);
+    } else {
+      return new _WorkerSendPort(managerId, isolateId, receivePortId);
+    }
+  }
+
+}
+
+class _JsVisitedMap implements _MessageTraverserVisitedMap {
+  List tagged;
+
+  /** Retrieves any information stored in the native object [object]. */
+  operator[](var object) {
+    return _getAttachedInfo(object);
+  }
+
+  /** Injects some information into the native [object]. */
+  void operator[]=(var object, var info) {
+    tagged.add(object);
+    _setAttachedInfo(object, info);
+  }
+
+  /** Get ready to rumble. */
+  void reset() {
+    assert(tagged == null);
+    tagged = new List();
+  }
+
+  /** Remove all information injected in the native objects. */
+  cleanup() {
+    for (int i = 0, length = tagged.length; i < length; i++) {
+      _clearAttachedInfo(tagged[i]);
+    }
+    tagged = null;
+  }
+
+  _clearAttachedInfo(var o) native
+      "o['__MessageTraverser__attached_info__'] = (void 0);";
+
+  _setAttachedInfo(var o, var info) native
+      "o['__MessageTraverser__attached_info__'] = info;";
+
+  _getAttachedInfo(var o) native
+      "return o['__MessageTraverser__attached_info__'];";
+}
+
+// only visible for testing purposes
+// TODO(sigmund): remove once we can disable privacy for testing (bug #1882)
+class TestingOnly {
+  static copy(x) {
+    return new _JsCopier().traverse(x);
+  }
+
+  // only visible for testing purposes
+  static serialize(x) {
+    _Serializer serializer = new _JsSerializer();
+    _Deserializer deserializer = new _JsDeserializer();
+    return deserializer.deserialize(serializer.traverse(x));
+  }
+}