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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "config.h"
#include "base/compiler_specific.h"
#include "GenericWorkerTask.h"
#include "KURL.h"
#include "ScriptExecutionContext.h"
#include "SecurityOrigin.h"
#include "WorkerContext.h"
#include "WorkerThread.h"
#include <wtf/Threading.h>
#undef LOG
#include "base/logging.h"
#include "webkit/glue/glue_util.h"
#include "webkit/glue/webworkerclient.h"
#include "webkit/glue/webworker_impl.h"
#if ENABLE(WORKERS)
WebWorker* WebWorker::Create(WebWorkerClient* client) {
return new WebWorkerImpl(client);
}
// This function is called on the main thread to force to initialize some static
// values used in WebKit before any worker thread is started. This is because in
// our worker processs, we do not run any WebKit code in main thread and thus
// when multiple workers try to start at the same time, we might hit crash due
// to contention for initializing static values.
void InitializeWebKitStaticValues() {
static bool initialized = false;
if (!initialized) {
initialized= true;
// Note that we have to pass a URL with valid protocol in order to follow
// the path to do static value initializations.
WTF::RefPtr<WebCore::SecurityOrigin> origin =
WebCore::SecurityOrigin::create(WebCore::KURL("http://localhost"));
origin.release();
}
}
WebWorkerImpl::WebWorkerImpl(WebWorkerClient* client) : client_(client) {
InitializeWebKitStaticValues();
}
WebWorkerImpl::~WebWorkerImpl() {
}
void WebWorkerImpl::PostMessageToWorkerContextTask(
WebCore::ScriptExecutionContext* context,
WebWorkerImpl* this_ptr,
const WebCore::String& message) {
DCHECK(context->isWorkerContext());
WebCore::WorkerContext* worker_context =
static_cast<WebCore::WorkerContext*>(context);
worker_context->dispatchMessage(message);
this_ptr->client_->ConfirmMessageFromWorkerObject(
worker_context->hasPendingActivity());
}
void WebWorkerImpl::StartWorkerContext(const GURL& script_url,
const string16& user_agent,
const string16& source_code) {
worker_thread_ = WebCore::WorkerThread::create(
webkit_glue::GURLToKURL(script_url),
webkit_glue::String16ToString(user_agent),
webkit_glue::String16ToString(source_code),
this);
// Worker initialization means a pending activity.
reportPendingActivity(true);
worker_thread_->start();
}
void WebWorkerImpl::TerminateWorkerContext() {
worker_thread_->stop();
}
void WebWorkerImpl::PostMessageToWorkerContext(const string16& message) {
worker_thread_->runLoop().postTask(WebCore::createCallbackTask(
&PostMessageToWorkerContextTask,
this,
webkit_glue::String16ToString(message)));
}
void WebWorkerImpl::WorkerObjectDestroyed() {
}
void WebWorkerImpl::postMessageToWorkerObject(const WebCore::String& message) {
client_->PostMessageToWorkerObject(webkit_glue::StringToString16(message));
}
void WebWorkerImpl::postExceptionToWorkerObject(
const WebCore::String& errorMessage,
int lineNumber,
const WebCore::String& sourceURL) {
client_->PostExceptionToWorkerObject(
webkit_glue::StringToString16(errorMessage),
lineNumber,
webkit_glue::StringToString16(sourceURL));
}
void WebWorkerImpl::postConsoleMessageToWorkerObject(
WebCore::MessageDestination destination,
WebCore::MessageSource source,
WebCore::MessageLevel level,
const WebCore::String& message,
int lineNumber,
const WebCore::String& sourceURL) {
client_->PostConsoleMessageToWorkerObject(
destination,
source,
level,
webkit_glue::StringToString16(message),
lineNumber,
webkit_glue::StringToString16(sourceURL));
}
void WebWorkerImpl::confirmMessageFromWorkerObject(bool hasPendingActivity) {
client_->ConfirmMessageFromWorkerObject(hasPendingActivity);
}
void WebWorkerImpl::reportPendingActivity(bool hasPendingActivity) {
client_->ReportPendingActivity(hasPendingActivity);
}
void WebWorkerImpl::workerContextDestroyed() {
client_->WorkerContextDestroyed();
// The lifetime of this proxy is controlled by the worker context.
delete this;
}
#else
WebWorker* WebWorker::Create(WebWorkerClient* client) {
return NULL;
}
#endif
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