| /* |
| * Copyright (C) 2009 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "WebWorkerClientImpl.h" |
| |
| #if ENABLE(WORKERS) |
| |
| #include "CrossThreadTask.h" |
| #include "DedicatedWorkerThread.h" |
| #include "ErrorEvent.h" |
| #include "Frame.h" |
| #include "FrameLoaderClient.h" |
| #include "MessageEvent.h" |
| #include "MessagePort.h" |
| #include "MessagePortChannel.h" |
| #include "ScriptCallStack.h" |
| #include "ScriptExecutionContext.h" |
| #include "Worker.h" |
| #include "WorkerContext.h" |
| #include "WorkerContextExecutionProxy.h" |
| #include "WorkerScriptController.h" |
| #include "WorkerMessagingProxy.h" |
| #include <wtf/Threading.h> |
| |
| #include "FrameLoaderClientImpl.h" |
| #include "PlatformMessagePortChannel.h" |
| #include "WebFrameClient.h" |
| #include "WebFrameImpl.h" |
| #include "WebKit.h" |
| #include "WebKitClient.h" |
| #include "WebMessagePortChannel.h" |
| #include "WebString.h" |
| #include "WebURL.h" |
| #include "WebViewImpl.h" |
| #include "WebWorker.h" |
| #include "WebWorkerImpl.h" |
| |
| using namespace WebCore; |
| |
| namespace WebKit { |
| |
| // When WebKit creates a WorkerContextProxy object, we check if we're in the |
| // renderer or worker process. If the latter, then we just use |
| // WorkerMessagingProxy. |
| // |
| // If we're in the renderer process, then we need use the glue provided |
| // WebWorker object to talk to the worker process over IPC. The worker process |
| // talks to Worker* using WorkerObjectProxy, which we implement on |
| // WebWorkerClientImpl. |
| // |
| // Note that if we're running each worker in a separate process, then nested |
| // workers end up using the same codepath as the renderer process. |
| |
| // static |
| WorkerContextProxy* WebWorkerClientImpl::createWorkerContextProxy(Worker* worker) |
| { |
| // Special behavior for multiple workers per process. |
| // FIXME: v8 doesn't support more than one workers per process. |
| // if (!worker->scriptExecutionContext()->isDocument()) |
| // return new WorkerMessagingProxy(worker); |
| |
| WebWorker* webWorker = 0; |
| WebWorkerClientImpl* proxy = new WebWorkerClientImpl(worker); |
| |
| if (worker->scriptExecutionContext()->isDocument()) { |
| Document* document = static_cast<Document*>( |
| worker->scriptExecutionContext()); |
| WebFrameImpl* webFrame = WebFrameImpl::fromFrame(document->frame()); |
| webWorker = webFrame->client()->createWorker(webFrame, proxy); |
| } else { |
| WorkerScriptController* controller = WorkerScriptController::controllerForContext(); |
| if (!controller) { |
| ASSERT_NOT_REACHED(); |
| return 0; |
| } |
| |
| DedicatedWorkerThread* thread = static_cast<DedicatedWorkerThread*>(controller->workerContext()->thread()); |
| WorkerObjectProxy* workerObjectProxy = &thread->workerObjectProxy(); |
| WebWorkerImpl* impl = reinterpret_cast<WebWorkerImpl*>(workerObjectProxy); |
| webWorker = impl->client()->createWorker(proxy); |
| } |
| |
| proxy->setWebWorker(webWorker); |
| return proxy; |
| } |
| |
| WebWorkerClientImpl::WebWorkerClientImpl(Worker* worker) |
| : m_scriptExecutionContext(worker->scriptExecutionContext()) |
| , m_worker(worker) |
| , m_askedToTerminate(false) |
| , m_unconfirmedMessageCount(0) |
| , m_workerContextHadPendingActivity(false) |
| , m_workerThreadId(currentThread()) |
| { |
| } |
| |
| WebWorkerClientImpl::~WebWorkerClientImpl() |
| { |
| } |
| |
| void WebWorkerClientImpl::setWebWorker(WebWorker* webWorker) |
| { |
| m_webWorker = webWorker; |
| } |
| |
| void WebWorkerClientImpl::startWorkerContext(const KURL& scriptURL, |
| const String& userAgent, |
| const String& sourceCode) |
| { |
| // Worker.terminate() could be called from JS before the context is started. |
| if (m_askedToTerminate) |
| return; |
| if (!isMainThread()) { |
| WebWorkerBase::dispatchTaskToMainThread(createCallbackTask( |
| &startWorkerContextTask, |
| this, |
| scriptURL.string(), |
| userAgent, |
| sourceCode)); |
| return; |
| } |
| m_webWorker->startWorkerContext(scriptURL, userAgent, sourceCode); |
| } |
| |
| void WebWorkerClientImpl::terminateWorkerContext() |
| { |
| if (m_askedToTerminate) |
| return; |
| m_askedToTerminate = true; |
| if (!isMainThread()) { |
| WebWorkerBase::dispatchTaskToMainThread(createCallbackTask(&terminateWorkerContextTask, this)); |
| return; |
| } |
| m_webWorker->terminateWorkerContext(); |
| } |
| |
| void WebWorkerClientImpl::postMessageToWorkerContext( |
| PassRefPtr<SerializedScriptValue> message, |
| PassOwnPtr<MessagePortChannelArray> channels) |
| { |
| // Worker.terminate() could be called from JS before the context is started. |
| if (m_askedToTerminate) |
| return; |
| ++m_unconfirmedMessageCount; |
| if (!isMainThread()) { |
| WebWorkerBase::dispatchTaskToMainThread(createCallbackTask(&postMessageToWorkerContextTask, |
| this, |
| message->toWireString(), |
| channels)); |
| return; |
| } |
| WebMessagePortChannelArray webChannels(channels.get() ? channels->size() : 0); |
| for (size_t i = 0; i < webChannels.size(); ++i) { |
| WebMessagePortChannel* webchannel = |
| (*channels)[i]->channel()->webChannelRelease(); |
| webchannel->setClient(0); |
| webChannels[i] = webchannel; |
| } |
| m_webWorker->postMessageToWorkerContext(message->toWireString(), webChannels); |
| } |
| |
| bool WebWorkerClientImpl::hasPendingActivity() const |
| { |
| return !m_askedToTerminate |
| && (m_unconfirmedMessageCount || m_workerContextHadPendingActivity); |
| } |
| |
| void WebWorkerClientImpl::workerObjectDestroyed() |
| { |
| if (isMainThread()) { |
| m_webWorker->workerObjectDestroyed(); |
| m_worker = 0; |
| } |
| // Even if this is called on the main thread, there could be a queued task for |
| // this object, so don't delete it right away. |
| WebWorkerBase::dispatchTaskToMainThread(createCallbackTask(&workerObjectDestroyedTask, |
| this)); |
| } |
| |
| void WebWorkerClientImpl::postMessageToWorkerObject(const WebString& message, |
| const WebMessagePortChannelArray& channels) |
| { |
| OwnPtr<MessagePortChannelArray> channels2; |
| if (channels.size()) { |
| channels2 = new MessagePortChannelArray(channels.size()); |
| for (size_t i = 0; i < channels.size(); ++i) { |
| RefPtr<PlatformMessagePortChannel> platform_channel = |
| PlatformMessagePortChannel::create(channels[i]); |
| channels[i]->setClient(platform_channel.get()); |
| (*channels2)[i] = MessagePortChannel::create(platform_channel); |
| } |
| } |
| |
| if (currentThread() != m_workerThreadId) { |
| m_scriptExecutionContext->postTask(createCallbackTask(&postMessageToWorkerObjectTask, |
| this, |
| String(message), |
| channels2.release())); |
| return; |
| } |
| |
| postMessageToWorkerObjectTask(m_scriptExecutionContext.get(), this, |
| message, channels2.release()); |
| } |
| |
| void WebWorkerClientImpl::postExceptionToWorkerObject(const WebString& errorMessage, |
| int lineNumber, |
| const WebString& sourceURL) |
| { |
| if (currentThread() != m_workerThreadId) { |
| m_scriptExecutionContext->postTask(createCallbackTask(&postExceptionToWorkerObjectTask, |
| this, |
| String(errorMessage), |
| lineNumber, |
| String(sourceURL))); |
| return; |
| } |
| |
| bool unhandled = m_worker->dispatchEvent(ErrorEvent::create(errorMessage, |
| sourceURL, |
| lineNumber)); |
| if (unhandled) |
| m_scriptExecutionContext->reportException(errorMessage, lineNumber, sourceURL, 0); |
| } |
| |
| void WebWorkerClientImpl::postConsoleMessageToWorkerObject(int destination, |
| int sourceId, |
| int messageType, |
| int messageLevel, |
| const WebString& message, |
| int lineNumber, |
| const WebString& sourceURL) |
| { |
| if (currentThread() != m_workerThreadId) { |
| m_scriptExecutionContext->postTask(createCallbackTask(&postConsoleMessageToWorkerObjectTask, |
| this, |
| sourceId, |
| messageType, |
| messageLevel, |
| String(message), |
| lineNumber, |
| String(sourceURL))); |
| return; |
| } |
| |
| m_scriptExecutionContext->addMessage(static_cast<MessageSource>(sourceId), |
| static_cast<MessageType>(messageType), |
| static_cast<MessageLevel>(messageLevel), |
| String(message), lineNumber, |
| String(sourceURL), 0); |
| } |
| |
| void WebWorkerClientImpl::postConsoleMessageToWorkerObject(int sourceId, |
| int messageType, |
| int messageLevel, |
| const WebString& message, |
| int lineNumber, |
| const WebString& sourceURL) |
| { |
| postConsoleMessageToWorkerObject(0, sourceId, messageType, messageLevel, message, lineNumber, sourceURL); |
| } |
| |
| void WebWorkerClientImpl::confirmMessageFromWorkerObject(bool hasPendingActivity) |
| { |
| // unconfirmed_message_count_ can only be updated on the thread where it's |
| // accessed. Otherwise there are race conditions with v8's garbage |
| // collection. |
| m_scriptExecutionContext->postTask(createCallbackTask(&confirmMessageFromWorkerObjectTask, |
| this)); |
| } |
| |
| void WebWorkerClientImpl::reportPendingActivity(bool hasPendingActivity) |
| { |
| // See above comment in confirmMessageFromWorkerObject. |
| m_scriptExecutionContext->postTask(createCallbackTask(&reportPendingActivityTask, |
| this, |
| hasPendingActivity)); |
| } |
| |
| void WebWorkerClientImpl::workerContextDestroyed() |
| { |
| } |
| |
| void WebWorkerClientImpl::workerContextClosed() |
| { |
| } |
| |
| void WebWorkerClientImpl::startWorkerContextTask(ScriptExecutionContext* context, |
| WebWorkerClientImpl* thisPtr, |
| const String& scriptURL, |
| const String& userAgent, |
| const String& sourceCode) |
| { |
| thisPtr->m_webWorker->startWorkerContext(KURL(ParsedURLString, scriptURL), |
| userAgent, sourceCode); |
| } |
| |
| void WebWorkerClientImpl::terminateWorkerContextTask(ScriptExecutionContext* context, |
| WebWorkerClientImpl* thisPtr) |
| { |
| thisPtr->m_webWorker->terminateWorkerContext(); |
| } |
| |
| void WebWorkerClientImpl::postMessageToWorkerContextTask(ScriptExecutionContext* context, |
| WebWorkerClientImpl* thisPtr, |
| const String& message, |
| PassOwnPtr<MessagePortChannelArray> channels) |
| { |
| WebMessagePortChannelArray webChannels(channels.get() ? channels->size() : 0); |
| |
| for (size_t i = 0; i < webChannels.size(); ++i) { |
| webChannels[i] = (*channels)[i]->channel()->webChannelRelease(); |
| webChannels[i]->setClient(0); |
| } |
| |
| thisPtr->m_webWorker->postMessageToWorkerContext(message, webChannels); |
| } |
| |
| void WebWorkerClientImpl::workerObjectDestroyedTask(ScriptExecutionContext* context, |
| WebWorkerClientImpl* thisPtr) |
| { |
| if (thisPtr->m_worker) // Check we haven't alread called this. |
| thisPtr->m_webWorker->workerObjectDestroyed(); |
| delete thisPtr; |
| } |
| |
| void WebWorkerClientImpl::postMessageToWorkerObjectTask( |
| ScriptExecutionContext* context, |
| WebWorkerClientImpl* thisPtr, |
| const String& message, |
| PassOwnPtr<MessagePortChannelArray> channels) |
| { |
| |
| if (thisPtr->m_worker) { |
| OwnPtr<MessagePortArray> ports = |
| MessagePort::entanglePorts(*context, channels); |
| RefPtr<SerializedScriptValue> serializedMessage = |
| SerializedScriptValue::createFromWire(message); |
| thisPtr->m_worker->dispatchEvent(MessageEvent::create(ports.release(), |
| serializedMessage.release())); |
| } |
| } |
| |
| void WebWorkerClientImpl::postExceptionToWorkerObjectTask( |
| ScriptExecutionContext* context, |
| WebWorkerClientImpl* thisPtr, |
| const String& errorMessage, |
| int lineNumber, |
| const String& sourceURL) |
| { |
| bool handled = false; |
| if (thisPtr->m_worker) |
| handled = thisPtr->m_worker->dispatchEvent(ErrorEvent::create(errorMessage, |
| sourceURL, |
| lineNumber)); |
| if (!handled) |
| thisPtr->m_scriptExecutionContext->reportException(errorMessage, lineNumber, sourceURL, 0); |
| } |
| |
| void WebWorkerClientImpl::postConsoleMessageToWorkerObjectTask(ScriptExecutionContext* context, |
| WebWorkerClientImpl* thisPtr, |
| int sourceId, |
| int messageType, |
| int messageLevel, |
| const String& message, |
| int lineNumber, |
| const String& sourceURL) |
| { |
| thisPtr->m_scriptExecutionContext->addMessage(static_cast<MessageSource>(sourceId), |
| static_cast<MessageType>(messageType), |
| static_cast<MessageLevel>(messageLevel), |
| message, lineNumber, sourceURL, 0); |
| } |
| |
| void WebWorkerClientImpl::confirmMessageFromWorkerObjectTask(ScriptExecutionContext* context, |
| WebWorkerClientImpl* thisPtr) |
| { |
| thisPtr->m_unconfirmedMessageCount--; |
| } |
| |
| void WebWorkerClientImpl::reportPendingActivityTask(ScriptExecutionContext* context, |
| WebWorkerClientImpl* thisPtr, |
| bool hasPendingActivity) |
| { |
| thisPtr->m_workerContextHadPendingActivity = hasPendingActivity; |
| } |
| |
| } // namespace WebKit |
| |
| #endif |
