Index: dart/sdk/lib/_internal/compiler/implementation/lib/isolate_helper.dart |
=================================================================== |
--- dart/sdk/lib/_internal/compiler/implementation/lib/isolate_helper.dart (revision 16250) |
+++ dart/sdk/lib/_internal/compiler/implementation/lib/isolate_helper.dart (working copy) |
@@ -1,1283 +0,0 @@ |
-// 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. |
- |
-library _isolate_helper; |
- |
-import 'dart:isolate'; |
-import 'dart:uri'; |
- |
-/** |
- * Called by the compiler to support switching |
- * between isolates when we get a callback from the DOM. |
- */ |
-void _callInIsolate(_IsolateContext isolate, Function function) { |
- isolate.eval(function); |
- _globalState.topEventLoop.run(); |
-} |
- |
-/** |
- * Called by the compiler to fetch the current isolate context. |
- */ |
-_IsolateContext _currentIsolate() => _globalState.currentContext; |
- |
-/******************************************************** |
- Inserted from lib/isolate/dart2js/compiler_hooks.dart |
- ********************************************************/ |
- |
-/** |
- * Wrapper that takes the dart entry point and runs it within an isolate. The |
- * dart2js compiler will inject a call of the form |
- * [: startRootIsolate(main); :] when it determines that this wrapping |
- * is needed. For single-isolate applications (e.g. hello world), this |
- * call is not emitted. |
- */ |
-void startRootIsolate(entry) { |
- _globalState = new _Manager(); |
- |
- // Don't start the main loop again, if we are in a worker. |
- if (_globalState.isWorker) return; |
- final rootContext = new _IsolateContext(); |
- _globalState.rootContext = rootContext; |
- _fillStatics(rootContext); |
- |
- // BUG(5151491): Setting currentContext should not be necessary, but |
- // because closures passed to the DOM as event handlers do not bind their |
- // isolate automatically we try to give them a reasonable context to live in |
- // by having a "default" isolate (the first one created). |
- _globalState.currentContext = rootContext; |
- |
- rootContext.eval(entry); |
- _globalState.topEventLoop.run(); |
-} |
- |
-/******************************************************** |
- Inserted from lib/isolate/dart2js/isolateimpl.dart |
- ********************************************************/ |
- |
-/** |
- * Concepts used here: |
- * |
- * "manager" - A manager contains one or more isolates, schedules their |
- * execution, and performs other plumbing on their behalf. The isolate |
- * present at the creation of the manager is designated as its "root isolate". |
- * A manager may, for example, be implemented on a web Worker. |
- * |
- * [_Manager] - State present within a manager (exactly once, as a global). |
- * |
- * [_ManagerStub] - A handle held within one manager that allows interaction |
- * with another manager. A target manager may be addressed by zero or more |
- * [_ManagerStub]s. |
- * |
- */ |
- |
-/** |
- * A native object that is shared across isolates. This object is visible to all |
- * isolates running under the same manager (either UI or background web worker). |
- * |
- * This is code that is intended to 'escape' the isolate boundaries in order to |
- * implement the semantics of isolates in JavaScript. Without this we would have |
- * been forced to implement more code (including the top-level event loop) in |
- * JavaScript itself. |
- */ |
-// TODO(eub, sigmund): move the "manager" to be entirely in JS. |
-// Running any Dart code outside the context of an isolate gives it |
-// the change to break the isolate abstraction. |
-_Manager get _globalState => JS("_Manager", r"$globalState"); |
-set _globalState(_Manager val) { |
- JS("void", r"$globalState = #", val); |
-} |
- |
-void _fillStatics(context) { |
- JS("void", r"$globals = #.isolateStatics", context); |
- JS("void", r"$static_init()"); |
-} |
- |
-ReceivePort lazyPort; |
- |
-/** State associated with the current manager. See [globalState]. */ |
-// TODO(sigmund): split in multiple classes: global, thread, main-worker states? |
-class _Manager { |
- |
- /** Next available isolate id within this [_Manager]. */ |
- int nextIsolateId = 0; |
- |
- /** id assigned to this [_Manager]. */ |
- int currentManagerId = 0; |
- |
- /** |
- * Next available manager id. Only used by the main manager to assign a unique |
- * id to each manager created by it. |
- */ |
- int nextManagerId = 1; |
- |
- /** Context for the currently running [Isolate]. */ |
- _IsolateContext currentContext = null; |
- |
- /** Context for the root [Isolate] that first run in this [_Manager]. */ |
- _IsolateContext rootContext = null; |
- |
- /** The top-level event loop. */ |
- _EventLoop topEventLoop; |
- |
- /** Whether this program is running from the command line. */ |
- bool fromCommandLine; |
- |
- /** Whether this [_Manager] is running as a web worker. */ |
- bool isWorker; |
- |
- /** Whether we support spawning web workers. */ |
- bool supportsWorkers; |
- |
- /** |
- * Whether to use web workers when implementing isolates. Set to false for |
- * debugging/testing. |
- */ |
- bool get useWorkers => supportsWorkers; |
- |
- /** |
- * Whether to use the web-worker JSON-based message serialization protocol. By |
- * default this is only used with web workers. For debugging, you can force |
- * using this protocol by changing this field value to [true]. |
- */ |
- bool get needSerialization => useWorkers; |
- |
- /** |
- * Registry of isolates. Isolates must be registered if, and only if, receive |
- * ports are alive. Normally no open receive-ports means that the isolate is |
- * dead, but DOM callbacks could resurrect it. |
- */ |
- Map<int, _IsolateContext> isolates; |
- |
- /** Reference to the main [_Manager]. Null in the main [_Manager] itself. */ |
- _ManagerStub mainManager; |
- |
- /** Registry of active [_ManagerStub]s. Only used in the main [_Manager]. */ |
- Map<int, _ManagerStub> managers; |
- |
- _Manager() { |
- _nativeDetectEnvironment(); |
- topEventLoop = new _EventLoop(); |
- isolates = new Map<int, _IsolateContext>(); |
- managers = new Map<int, _ManagerStub>(); |
- if (isWorker) { // "if we are not the main manager ourself" is the intent. |
- mainManager = new _MainManagerStub(); |
- _nativeInitWorkerMessageHandler(); |
- } |
- } |
- |
- void _nativeDetectEnvironment() { |
- isWorker = JS("bool", r"$isWorker"); |
- supportsWorkers = JS("bool", r"$supportsWorkers"); |
- fromCommandLine = JS("bool", r"typeof(window) == 'undefined'"); |
- } |
- |
- void _nativeInitWorkerMessageHandler() { |
- JS("void", r""" |
-$globalThis.onmessage = function (e) { |
- IsolateNatives._processWorkerMessage(this.mainManager, e); |
-}"""); |
- } |
- /*: TODO: check that _processWorkerMessage is not discarded while treeshaking. |
- """ { |
- IsolateNatives._processWorkerMessage(null, null); |
- } |
- */ |
- |
- |
- /** Close the worker running this code if all isolates are done. */ |
- void maybeCloseWorker() { |
- if (isolates.isEmpty) { |
- mainManager.postMessage(_serializeMessage({'command': 'close'})); |
- } |
- } |
-} |
- |
-/** Context information tracked for each isolate. */ |
-class _IsolateContext { |
- /** Current isolate id. */ |
- int id; |
- |
- /** Registry of receive ports currently active on this isolate. */ |
- Map<int, ReceivePort> ports; |
- |
- /** Holds isolate globals (statics and top-level properties). */ |
- var isolateStatics; // native object containing all globals of an isolate. |
- |
- _IsolateContext() { |
- id = _globalState.nextIsolateId++; |
- ports = new Map<int, ReceivePort>(); |
- initGlobals(); |
- } |
- |
- // these are filled lazily the first time the isolate starts running. |
- void initGlobals() { JS("void", r'$initGlobals(#)', this); } |
- |
- /** |
- * Run [code] in the context of the isolate represented by [this]. Note this |
- * is called from JavaScript (see $wrap_call in corejs.dart). |
- */ |
- dynamic eval(Function code) { |
- var old = _globalState.currentContext; |
- _globalState.currentContext = this; |
- this._setGlobals(); |
- var result = null; |
- try { |
- result = code(); |
- } finally { |
- _globalState.currentContext = old; |
- if (old != null) old._setGlobals(); |
- } |
- return result; |
- } |
- |
- void _setGlobals() { JS("void", r'$setGlobals(#)', this); } |
- |
- /** Lookup a port registered for this isolate. */ |
- ReceivePort lookup(int portId) => ports[portId]; |
- |
- /** Register a port on this isolate. */ |
- void register(int portId, ReceivePort port) { |
- if (ports.containsKey(portId)) { |
- throw new Exception("Registry: ports must be registered only once."); |
- } |
- ports[portId] = port; |
- _globalState.isolates[id] = this; // indicate this isolate is active |
- } |
- |
- /** Unregister a port on this isolate. */ |
- void unregister(int portId) { |
- ports.remove(portId); |
- if (ports.isEmpty) { |
- _globalState.isolates.remove(id); // indicate this isolate is not active |
- } |
- } |
-} |
- |
-/** Represent the event loop on a javascript thread (DOM or worker). */ |
-class _EventLoop { |
- Queue<_IsolateEvent> events; |
- |
- _EventLoop() : events = new Queue<_IsolateEvent>(); |
- |
- void enqueue(isolate, fn, msg) { |
- events.addLast(new _IsolateEvent(isolate, fn, msg)); |
- } |
- |
- _IsolateEvent dequeue() { |
- if (events.isEmpty) return null; |
- return events.removeFirst(); |
- } |
- |
- /** Process a single event, if any. */ |
- bool runIteration() { |
- final event = dequeue(); |
- if (event == null) { |
- if (_globalState.isWorker) { |
- _globalState.maybeCloseWorker(); |
- } else if (_globalState.rootContext != null && |
- _globalState.isolates.containsKey( |
- _globalState.rootContext.id) && |
- _globalState.fromCommandLine && |
- _globalState.rootContext.ports.isEmpty) { |
- // We want to reach here only on the main [_Manager] and only |
- // on the command-line. In the browser the isolate might |
- // still be alive due to DOM callbacks, but the presumption is |
- // that on the command-line, no future events can be injected |
- // into the event queue once it's empty. Node has setTimeout |
- // so this presumption is incorrect there. We think(?) that |
- // in d8 this assumption is valid. |
- throw new Exception("Program exited with open ReceivePorts."); |
- } |
- return false; |
- } |
- event.process(); |
- return true; |
- } |
- |
- /** |
- * Runs multiple iterations of the run-loop. If possible, each iteration is |
- * run asynchronously. |
- */ |
- void _runHelper() { |
- if (hasWindow()) { |
- // Run each iteration from the browser's top event loop. |
- void next() { |
- if (!runIteration()) return; |
- _window.setTimeout(next, 0); |
- } |
- next(); |
- } else { |
- // Run synchronously until no more iterations are available. |
- while (runIteration()) {} |
- } |
- } |
- |
- /** |
- * Call [_runHelper] but ensure that worker exceptions are propragated. Note |
- * this is called from JavaScript (see $wrap_call in corejs.dart). |
- */ |
- void run() { |
- if (!_globalState.isWorker) { |
- _runHelper(); |
- } else { |
- try { |
- _runHelper(); |
- } catch (e, trace) { |
- _globalState.mainManager.postMessage(_serializeMessage( |
- {'command': 'error', 'msg': '$e\n$trace' })); |
- } |
- } |
- } |
-} |
- |
-/** An event in the top-level event queue. */ |
-class _IsolateEvent { |
- _IsolateContext isolate; |
- Function fn; |
- String message; |
- |
- _IsolateEvent(this.isolate, this.fn, this.message); |
- |
- void process() { |
- isolate.eval(fn); |
- } |
-} |
- |
-/** An interface for a stub used to interact with a manager. */ |
-abstract class _ManagerStub { |
- get id; |
- void set id(int i); |
- void set onmessage(Function f); |
- void postMessage(msg); |
- void terminate(); |
-} |
- |
-/** A stub for interacting with the main manager. */ |
-class _MainManagerStub implements _ManagerStub { |
- get id => 0; |
- void set id(int i) { throw new UnimplementedError(); } |
- void set onmessage(f) { |
- throw new Exception("onmessage should not be set on MainManagerStub"); |
- } |
- void postMessage(msg) { JS("void", r"$globalThis.postMessage(#)", msg); } |
- void terminate() {} // Nothing useful to do here. |
-} |
- |
-/** |
- * A stub for interacting with a manager built on a web worker. This |
- * definition uses a 'hidden' type (* prefix on the native name) to |
- * enforce that the type is defined dynamically only when web workers |
- * are actually available. |
- */ |
-// @Native("*Worker"); |
-class _WorkerStub implements _ManagerStub { |
- get id => JS("var", "#.id", this); |
- void set id(i) { JS("void", "#.id = #", this, i); } |
- void set onmessage(f) { JS("void", "#.onmessage = #", this, f); } |
- void postMessage(msg) => JS("void", "#.postMessage(#)", this, msg); |
- // terminate() is implemented by Worker. |
- void terminate(); |
-} |
- |
-const String _SPAWNED_SIGNAL = "spawned"; |
- |
-class IsolateNatives { |
- |
- /** |
- * The src url for the script tag that loaded this code. Used to create |
- * JavaScript workers. |
- */ |
- static String get _thisScript => JS("String", r"$thisScriptUrl"); |
- |
- /** Starts a new worker with the given URL. */ |
- static _WorkerStub _newWorker(url) => JS("_WorkerStub", r"new Worker(#)", url); |
- |
- /** |
- * Assume that [e] is a browser message event and extract its message data. |
- * We don't import the dom explicitly so, when workers are disabled, this |
- * library can also run on top of nodejs. |
- */ |
- //static _getEventData(e) => JS("Object", "#.data", e); |
- static _getEventData(e) => JS("", "#.data", e); |
- |
- /** |
- * Process messages on a worker, either to control the worker instance or to |
- * pass messages along to the isolate running in the worker. |
- */ |
- static void _processWorkerMessage(sender, e) { |
- var msg = _deserializeMessage(_getEventData(e)); |
- switch (msg['command']) { |
- case 'start': |
- _globalState.currentManagerId = msg['id']; |
- Function entryPoint = _getJSFunctionFromName(msg['functionName']); |
- var replyTo = _deserializeMessage(msg['replyTo']); |
- _globalState.topEventLoop.enqueue(new _IsolateContext(), function() { |
- _startIsolate(entryPoint, replyTo); |
- }, 'worker-start'); |
- _globalState.topEventLoop.run(); |
- break; |
- case 'spawn-worker': |
- _spawnWorker(msg['functionName'], msg['uri'], msg['replyPort']); |
- break; |
- case 'message': |
- msg['port'].send(msg['msg'], msg['replyTo']); |
- _globalState.topEventLoop.run(); |
- break; |
- case 'close': |
- _log("Closing Worker"); |
- _globalState.managers.remove(sender.id); |
- sender.terminate(); |
- _globalState.topEventLoop.run(); |
- break; |
- case 'log': |
- _log(msg['msg']); |
- break; |
- case 'print': |
- if (_globalState.isWorker) { |
- _globalState.mainManager.postMessage( |
- _serializeMessage({'command': 'print', 'msg': msg})); |
- } else { |
- print(msg['msg']); |
- } |
- break; |
- case 'error': |
- throw msg['msg']; |
- } |
- } |
- |
- /** Log a message, forwarding to the main [_Manager] if appropriate. */ |
- static _log(msg) { |
- if (_globalState.isWorker) { |
- _globalState.mainManager.postMessage( |
- _serializeMessage({'command': 'log', 'msg': msg })); |
- } else { |
- try { |
- _consoleLog(msg); |
- } catch (e, trace) { |
- throw new Exception(trace); |
- } |
- } |
- } |
- |
- static void _consoleLog(msg) { |
- JS("void", r"$globalThis.console.log(#)", msg); |
- } |
- |
- /** |
- * Extract the constructor of runnable, so it can be allocated in another |
- * isolate. |
- */ |
- static dynamic _getJSConstructor(Isolate runnable) { |
- return JS("Object", "#.constructor", runnable); |
- } |
- |
- /** Extract the constructor name of a runnable */ |
- // TODO(sigmund): find a browser-generic way to support this. |
- // TODO(floitsch): is this function still used? If yes, should we use |
- // Primitives.objectTypeName instead? |
- static dynamic _getJSConstructorName(Isolate runnable) { |
- return JS("Object", "#.constructor.name", runnable); |
- } |
- |
- /** Find a constructor given its name. */ |
- static dynamic _getJSConstructorFromName(String factoryName) { |
- return JS("Object", r"$globalThis[#]", factoryName); |
- } |
- |
- static dynamic _getJSFunctionFromName(String functionName) { |
- return JS("Object", r"$globalThis[#]", functionName); |
- } |
- |
- /** |
- * Get a string name for the function, if possible. The result for |
- * anonymous functions is browser-dependent -- it may be "" or "anonymous" |
- * but you should probably not count on this. |
- */ |
- static String _getJSFunctionName(Function f) { |
- return JS("Object", r"(#.$name || #)", f, null); |
- } |
- |
- /** Create a new JavaScript object instance given its constructor. */ |
- static dynamic _allocate(var ctor) { |
- return JS("Object", "new #()", ctor); |
- } |
- |
- static SendPort spawnFunction(void topLevelFunction()) { |
- final name = _getJSFunctionName(topLevelFunction); |
- if (name == null) { |
- throw new UnsupportedError( |
- "only top-level functions can be spawned."); |
- } |
- return spawn(name, null, false); |
- } |
- |
- // TODO(sigmund): clean up above, after we make the new API the default: |
- |
- static SendPort spawn(String functionName, String uri, bool isLight) { |
- Completer<SendPort> completer = new Completer<SendPort>(); |
- ReceivePort port = new ReceivePort(); |
- port.receive((msg, SendPort replyPort) { |
- port.close(); |
- assert(msg == _SPAWNED_SIGNAL); |
- completer.complete(replyPort); |
- }); |
- |
- SendPort signalReply = port.toSendPort(); |
- |
- if (_globalState.useWorkers && !isLight) { |
- _startWorker(functionName, uri, signalReply); |
- } else { |
- _startNonWorker(functionName, uri, signalReply); |
- } |
- return new _BufferingSendPort( |
- _globalState.currentContext.id, completer.future); |
- } |
- |
- static SendPort _startWorker( |
- String functionName, String uri, SendPort replyPort) { |
- if (_globalState.isWorker) { |
- _globalState.mainManager.postMessage(_serializeMessage({ |
- 'command': 'spawn-worker', |
- 'functionName': functionName, |
- 'uri': uri, |
- 'replyPort': replyPort})); |
- } else { |
- _spawnWorker(functionName, uri, replyPort); |
- } |
- } |
- |
- static SendPort _startNonWorker( |
- String functionName, String uri, SendPort replyPort) { |
- // TODO(eub): support IE9 using an iframe -- Dart issue 1702. |
- if (uri != null) throw new UnsupportedError( |
- "Currently spawnUri is not supported without web workers."); |
- _globalState.topEventLoop.enqueue(new _IsolateContext(), function() { |
- final func = _getJSFunctionFromName(functionName); |
- _startIsolate(func, replyPort); |
- }, 'nonworker start'); |
- } |
- |
- static void _startIsolate(Function topLevel, SendPort replyTo) { |
- _fillStatics(_globalState.currentContext); |
- lazyPort = new ReceivePort(); |
- replyTo.send(_SPAWNED_SIGNAL, port.toSendPort()); |
- |
- topLevel(); |
- } |
- |
- /** |
- * Spawns an isolate in a worker. [factoryName] is the Javascript constructor |
- * name for the isolate entry point class. |
- */ |
- static void _spawnWorker(functionName, uri, replyPort) { |
- if (functionName == null) functionName = 'main'; |
- if (uri == null) uri = _thisScript; |
- if (!(new Uri.fromString(uri).isAbsolute())) { |
- // The constructor of dom workers requires an absolute URL. If we use a |
- // relative path we will get a DOM exception. |
- String prefix = _thisScript.substring(0, _thisScript.lastIndexOf('/')); |
- uri = "$prefix/$uri"; |
- } |
- final worker = _newWorker(uri); |
- worker.onmessage = (e) { _processWorkerMessage(worker, e); }; |
- var workerId = _globalState.nextManagerId++; |
- // We also store the id on the worker itself so that we can unregister it. |
- worker.id = workerId; |
- _globalState.managers[workerId] = worker; |
- worker.postMessage(_serializeMessage({ |
- 'command': 'start', |
- 'id': workerId, |
- // Note: we serialize replyPort twice because the child worker needs to |
- // first deserialize the worker id, before it can correctly deserialize |
- // the port (port deserialization is sensitive to what is the current |
- // workerId). |
- 'replyTo': _serializeMessage(replyPort), |
- 'functionName': functionName })); |
- } |
-} |
- |
-/******************************************************** |
- Inserted from lib/isolate/dart2js/ports.dart |
- ********************************************************/ |
- |
-/** Common functionality to all send ports. */ |
-class _BaseSendPort implements SendPort { |
- /** Id for the destination isolate. */ |
- final int _isolateId; |
- |
- const _BaseSendPort(this._isolateId); |
- |
- void _checkReplyTo(SendPort replyTo) { |
- if (replyTo != null |
- && replyTo is! _NativeJsSendPort |
- && replyTo is! _WorkerSendPort |
- && replyTo is! _BufferingSendPort) { |
- throw new Exception("SendPort.send: Illegal replyTo port type"); |
- } |
- } |
- |
- Future call(var message) { |
- final completer = new Completer(); |
- final port = new ReceivePortImpl(); |
- send(message, port.toSendPort()); |
- port.receive((value, ignoreReplyTo) { |
- port.close(); |
- if (value is Exception) { |
- completer.completeException(value); |
- } else { |
- completer.complete(value); |
- } |
- }); |
- return completer.future; |
- } |
- |
- void send(var message, [SendPort replyTo]); |
- bool operator ==(var other); |
- int get hashCode; |
-} |
- |
-/** A send port that delivers messages in-memory via native JavaScript calls. */ |
-class _NativeJsSendPort extends _BaseSendPort implements SendPort { |
- final ReceivePortImpl _receivePort; |
- |
- const _NativeJsSendPort(this._receivePort, int isolateId) : super(isolateId); |
- |
- void send(var message, [SendPort replyTo = null]) { |
- _waitForPendingPorts([message, replyTo], () { |
- _checkReplyTo(replyTo); |
- // Check that the isolate still runs and the port is still open |
- final isolate = _globalState.isolates[_isolateId]; |
- if (isolate == null) return; |
- if (_receivePort._callback == null) return; |
- |
- // We force serialization/deserialization as a simple way to ensure |
- // isolate communication restrictions are respected between isolates that |
- // live in the same worker. [_NativeJsSendPort] delivers both messages |
- // from the same worker and messages from other workers. In particular, |
- // messages sent from a worker via a [_WorkerSendPort] are received at |
- // [_processWorkerMessage] and forwarded to a native port. In such cases, |
- // here we'll see [_globalState.currentContext == null]. |
- final shouldSerialize = _globalState.currentContext != null |
- && _globalState.currentContext.id != _isolateId; |
- var msg = message; |
- var reply = replyTo; |
- if (shouldSerialize) { |
- msg = _serializeMessage(msg); |
- reply = _serializeMessage(reply); |
- } |
- _globalState.topEventLoop.enqueue(isolate, () { |
- if (_receivePort._callback != null) { |
- if (shouldSerialize) { |
- msg = _deserializeMessage(msg); |
- reply = _deserializeMessage(reply); |
- } |
- _receivePort._callback(msg, reply); |
- } |
- }, 'receive $message'); |
- }); |
- } |
- |
- bool operator ==(var other) => (other is _NativeJsSendPort) && |
- (_receivePort == other._receivePort); |
- |
- int get hashCode => _receivePort._id; |
-} |
- |
-/** A send port that delivers messages via worker.postMessage. */ |
-// TODO(eub): abstract this for iframes. |
-class _WorkerSendPort extends _BaseSendPort implements SendPort { |
- final int _workerId; |
- final int _receivePortId; |
- |
- const _WorkerSendPort(this._workerId, int isolateId, this._receivePortId) |
- : super(isolateId); |
- |
- void send(var message, [SendPort replyTo = null]) { |
- _waitForPendingPorts([message, replyTo], () { |
- _checkReplyTo(replyTo); |
- final workerMessage = _serializeMessage({ |
- 'command': 'message', |
- 'port': this, |
- 'msg': message, |
- 'replyTo': replyTo}); |
- |
- if (_globalState.isWorker) { |
- // communication from one worker to another go through the main worker: |
- _globalState.mainManager.postMessage(workerMessage); |
- } else { |
- _globalState.managers[_workerId].postMessage(workerMessage); |
- } |
- }); |
- } |
- |
- bool operator ==(var other) { |
- return (other is _WorkerSendPort) && |
- (_workerId == other._workerId) && |
- (_isolateId == other._isolateId) && |
- (_receivePortId == other._receivePortId); |
- } |
- |
- int get hashCode { |
- // TODO(sigmund): use a standard hash when we get one available in corelib. |
- return (_workerId << 16) ^ (_isolateId << 8) ^ _receivePortId; |
- } |
-} |
- |
-/** A port that buffers messages until an underlying port gets resolved. */ |
-class _BufferingSendPort extends _BaseSendPort implements SendPort { |
- /** Internal counter to assign unique ids to each port. */ |
- static int _idCount = 0; |
- |
- /** For implementing equals and hashcode. */ |
- final int _id; |
- |
- /** Underlying port, when resolved. */ |
- SendPort _port; |
- |
- /** |
- * Future of the underlying port, so that we can detect when this port can be |
- * sent on messages. |
- */ |
- Future<SendPort> _futurePort; |
- |
- /** Pending messages (and reply ports). */ |
- List pending; |
- |
- _BufferingSendPort(isolateId, this._futurePort) |
- : super(isolateId), _id = _idCount, pending = [] { |
- _idCount++; |
- _futurePort.then((p) { |
- _port = p; |
- for (final item in pending) { |
- p.send(item['message'], item['replyTo']); |
- } |
- pending = null; |
- }); |
- } |
- |
- _BufferingSendPort.fromPort(isolateId, this._port) |
- : super(isolateId), _id = _idCount { |
- _idCount++; |
- } |
- |
- void send(var message, [SendPort replyTo]) { |
- if (_port != null) { |
- _port.send(message, replyTo); |
- } else { |
- pending.add({'message': message, 'replyTo': replyTo}); |
- } |
- } |
- |
- bool operator ==(var other) => |
- other is _BufferingSendPort && _id == other._id; |
- int get hashCode => _id; |
-} |
- |
-/** Implementation of a multi-use [ReceivePort] on top of JavaScript. */ |
-class ReceivePortImpl implements ReceivePort { |
- int _id; |
- Function _callback; |
- static int _nextFreeId = 1; |
- |
- ReceivePortImpl() |
- : _id = _nextFreeId++ { |
- _globalState.currentContext.register(_id, this); |
- } |
- |
- void receive(void onMessage(var message, SendPort replyTo)) { |
- _callback = onMessage; |
- } |
- |
- void close() { |
- _callback = null; |
- _globalState.currentContext.unregister(_id); |
- } |
- |
- SendPort toSendPort() { |
- return new _NativeJsSendPort(this, _globalState.currentContext.id); |
- } |
-} |
- |
-/** Wait until all ports in a message are resolved. */ |
-_waitForPendingPorts(var message, void callback()) { |
- final finder = new _PendingSendPortFinder(); |
- finder.traverse(message); |
- Futures.wait(finder.ports).then((_) => callback()); |
-} |
- |
- |
-/** Visitor that finds all unresolved [SendPort]s in a message. */ |
-class _PendingSendPortFinder extends _MessageTraverser { |
- List<Future<SendPort>> ports; |
- _PendingSendPortFinder() : super(), ports = [] { |
- _visited = new _JsVisitedMap(); |
- } |
- |
- visitPrimitive(x) {} |
- |
- visitList(List list) { |
- final seen = _visited[list]; |
- if (seen != null) return; |
- _visited[list] = true; |
- // TODO(sigmund): replace with the following: (bug #1660) |
- // list.forEach(_dispatch); |
- list.forEach((e) => _dispatch(e)); |
- } |
- |
- visitMap(Map map) { |
- final seen = _visited[map]; |
- if (seen != null) return; |
- |
- _visited[map] = true; |
- // TODO(sigmund): replace with the following: (bug #1660) |
- // map.values.forEach(_dispatch); |
- map.values.forEach((e) => _dispatch(e)); |
- } |
- |
- visitSendPort(SendPort port) { |
- if (port is _BufferingSendPort && port._port == null) { |
- ports.add(port._futurePort); |
- } |
- } |
-} |
- |
-/******************************************************** |
- Inserted from lib/isolate/dart2js/messages.dart |
- ********************************************************/ |
- |
-// 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. */ |
- void cleanup() { |
- for (int i = 0, length = tagged.length; i < length; i++) { |
- _clearAttachedInfo(tagged[i]); |
- } |
- tagged = null; |
- } |
- |
- void _clearAttachedInfo(var o) { |
- JS("void", "#['__MessageTraverser__attached_info__'] = #", o, null); |
- } |
- |
- void _setAttachedInfo(var o, var info) { |
- JS("void", "#['__MessageTraverser__attached_info__'] = #", o, info); |
- } |
- |
- _getAttachedInfo(var o) { |
- return JS("", "#['__MessageTraverser__attached_info__']", o); |
- } |
-} |
- |
-// 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)); |
- } |
-} |
- |
-/******************************************************** |
- Inserted from lib/isolate/serialization.dart |
- ********************************************************/ |
- |
-class _MessageTraverserVisitedMap { |
- |
- operator[](var object) => null; |
- void operator[]=(var object, var info) { } |
- |
- void reset() { } |
- void cleanup() { } |
- |
-} |
- |
-/** Abstract visitor for dart objects that can be sent as isolate messages. */ |
-class _MessageTraverser { |
- |
- _MessageTraverserVisitedMap _visited; |
- _MessageTraverser() : _visited = new _MessageTraverserVisitedMap(); |
- |
- /** Visitor's entry point. */ |
- traverse(var x) { |
- if (isPrimitive(x)) return visitPrimitive(x); |
- _visited.reset(); |
- var result; |
- try { |
- result = _dispatch(x); |
- } finally { |
- _visited.cleanup(); |
- } |
- return result; |
- } |
- |
- _dispatch(var x) { |
- if (isPrimitive(x)) return visitPrimitive(x); |
- if (x is List) return visitList(x); |
- if (x is Map) return visitMap(x); |
- if (x is SendPort) return visitSendPort(x); |
- if (x is SendPortSync) return visitSendPortSync(x); |
- |
- // Overridable fallback. |
- return visitObject(x); |
- } |
- |
- visitPrimitive(x); |
- visitList(List x); |
- visitMap(Map x); |
- visitSendPort(SendPort x); |
- visitSendPortSync(SendPortSync x); |
- |
- visitObject(Object x) { |
- // TODO(floitsch): make this a real exception. (which one)? |
- throw "Message serialization: Illegal value $x passed"; |
- } |
- |
- static bool isPrimitive(x) { |
- return (x == null) || (x is String) || (x is num) || (x is bool); |
- } |
-} |
- |
- |
-/** A visitor that recursively copies a message. */ |
-class _Copier extends _MessageTraverser { |
- |
- visitPrimitive(x) => x; |
- |
- List visitList(List list) { |
- List copy = _visited[list]; |
- if (copy != null) return copy; |
- |
- int len = list.length; |
- |
- // TODO(floitsch): we loose the generic type of the List. |
- copy = new List(len); |
- _visited[list] = copy; |
- for (int i = 0; i < len; i++) { |
- copy[i] = _dispatch(list[i]); |
- } |
- return copy; |
- } |
- |
- Map visitMap(Map map) { |
- Map copy = _visited[map]; |
- if (copy != null) return copy; |
- |
- // TODO(floitsch): we loose the generic type of the map. |
- copy = new Map(); |
- _visited[map] = copy; |
- map.forEach((key, val) { |
- copy[_dispatch(key)] = _dispatch(val); |
- }); |
- return copy; |
- } |
- |
-} |
- |
-/** Visitor that serializes a message as a JSON array. */ |
-class _Serializer extends _MessageTraverser { |
- int _nextFreeRefId = 0; |
- |
- visitPrimitive(x) => x; |
- |
- visitList(List list) { |
- int copyId = _visited[list]; |
- if (copyId != null) return ['ref', copyId]; |
- |
- int id = _nextFreeRefId++; |
- _visited[list] = id; |
- var jsArray = _serializeList(list); |
- // TODO(floitsch): we are losing the generic type. |
- return ['list', id, jsArray]; |
- } |
- |
- visitMap(Map map) { |
- int copyId = _visited[map]; |
- if (copyId != null) return ['ref', copyId]; |
- |
- int id = _nextFreeRefId++; |
- _visited[map] = id; |
- var keys = _serializeList(map.keys); |
- var values = _serializeList(map.values); |
- // TODO(floitsch): we are losing the generic type. |
- return ['map', id, keys, values]; |
- } |
- |
- _serializeList(List list) { |
- int len = list.length; |
- var result = new List(len); |
- for (int i = 0; i < len; i++) { |
- result[i] = _dispatch(list[i]); |
- } |
- return result; |
- } |
-} |
- |
-/** Deserializes arrays created with [_Serializer]. */ |
-class _Deserializer { |
- Map<int, dynamic> _deserialized; |
- |
- _Deserializer(); |
- |
- static bool isPrimitive(x) { |
- return (x == null) || (x is String) || (x is num) || (x is bool); |
- } |
- |
- deserialize(x) { |
- if (isPrimitive(x)) return x; |
- // TODO(floitsch): this should be new HashMap<int, var|Dynamic>() |
- _deserialized = new HashMap(); |
- return _deserializeHelper(x); |
- } |
- |
- _deserializeHelper(x) { |
- if (isPrimitive(x)) return x; |
- assert(x is List); |
- switch (x[0]) { |
- case 'ref': return _deserializeRef(x); |
- case 'list': return _deserializeList(x); |
- case 'map': return _deserializeMap(x); |
- case 'sendport': return deserializeSendPort(x); |
- default: return deserializeObject(x); |
- } |
- } |
- |
- _deserializeRef(List x) { |
- int id = x[1]; |
- var result = _deserialized[id]; |
- assert(result != null); |
- return result; |
- } |
- |
- List _deserializeList(List x) { |
- int id = x[1]; |
- // We rely on the fact that Dart-lists are directly mapped to Js-arrays. |
- List dartList = x[2]; |
- _deserialized[id] = dartList; |
- int len = dartList.length; |
- for (int i = 0; i < len; i++) { |
- dartList[i] = _deserializeHelper(dartList[i]); |
- } |
- return dartList; |
- } |
- |
- Map _deserializeMap(List x) { |
- Map result = new Map(); |
- int id = x[1]; |
- _deserialized[id] = result; |
- List keys = x[2]; |
- List values = x[3]; |
- int len = keys.length; |
- assert(len == values.length); |
- for (int i = 0; i < len; i++) { |
- var key = _deserializeHelper(keys[i]); |
- var value = _deserializeHelper(values[i]); |
- result[key] = value; |
- } |
- return result; |
- } |
- |
- deserializeSendPort(List x); |
- |
- deserializeObject(List x) { |
- // TODO(floitsch): Use real exception (which one?). |
- throw "Unexpected serialized object"; |
- } |
-} |
- |
-/******************************************************** |
- Inserted from lib/isolate/dart2js/timer_provider.dart |
- ********************************************************/ |
- |
-// We don't want to import the DOM library just because of window.setTimeout, |
-// so we reconstruct the Window class here. The only conflict that could happen |
-// with the other DOMWindow class would be because of subclasses. |
-// Currently, none of the two Dart classes have subclasses. |
-typedef void _TimeoutHandler(); |
- |
-// @Native("*DOMWindow"); |
-class _Window { |
- int setTimeout(_TimeoutHandler handler, int timeout) { |
- return JS('int', |
- '#.setTimeout(#, #)', |
- this, |
- convertDartClosureToJS(handler, 0), |
- timeout); |
- } |
- |
- int setInterval(_TimeoutHandler handler, int timeout) { |
- return JS('int', |
- '#.setInterval(#, #)', |
- this, |
- convertDartClosureToJS(handler, 0), |
- timeout); |
- } |
- |
- void clearTimeout(int handle) { |
- JS('void', '#.clearTimeout(#)', this, handle); |
- } |
- |
- void clearInterval(int handle) { |
- JS('void', '#.clearInterval(#)', this, handle); |
- } |
-} |
- |
-_Window get _window => |
- JS('bool', 'typeof window != "undefined"') ? JS('_Window', 'window') : null; |
- |
-bool hasWindow() => _window != null; |
- |
-class TimerImpl implements Timer { |
- final bool _once; |
- int _handle; |
- |
- TimerImpl(int milliseconds, void callback(Timer timer)) |
- : _once = true { |
- _handle = _window.setTimeout(() => callback(this), milliseconds); |
- } |
- |
- TimerImpl.repeating(int milliseconds, void callback(Timer timer)) |
- : _once = false { |
- _handle = _window.setInterval(() => callback(this), milliseconds); |
- } |
- |
- void cancel() { |
- if (_once) { |
- _window.clearTimeout(_handle); |
- } else { |
- _window.clearInterval(_handle); |
- } |
- } |
-} |