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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/MainThread.h>
#include <wtf/Threading.h>
#undef LOG
#include "base/logging.h"
#include "webkit/api/public/WebString.h"
#include "webkit/api/public/WebURL.h"
#include "webkit/api/public/WebWorkerClient.h"
#include "webkit/glue/glue_util.h"
#include "webkit/glue/webworker_impl.h"
using WebKit::WebWorker;
using WebKit::WebWorkerClient;
using WebKit::WebString;
using WebKit::WebURL;
#if ENABLE(WORKERS)
namespace WebKit {
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());
}
// WebWorker -------------------------------------------------------------------
void WebWorkerImpl::startWorkerContext(const WebURL& script_url,
const WebString& user_agent,
const WebString& source_code) {
worker_thread_ = WebCore::WorkerThread::create(
webkit_glue::WebURLToKURL(script_url),
webkit_glue::WebStringToString(user_agent),
webkit_glue::WebStringToString(source_code),
this);
// Worker initialization means a pending activity.
reportPendingActivity(true);
worker_thread_->start();
}
void WebWorkerImpl::terminateWorkerContext() {
worker_thread_->stop();
}
void WebWorkerImpl::postMessageToWorkerContext(const WebString& message) {
worker_thread_->runLoop().postTask(WebCore::createCallbackTask(
&PostMessageToWorkerContextTask,
this,
webkit_glue::WebStringToString(message)));
}
void WebWorkerImpl::workerObjectDestroyed() {
}
void WebWorkerImpl::DispatchTaskToMainThread(
PassRefPtr<WebCore::ScriptExecutionContext::Task> task) {
return WTF::callOnMainThread(InvokeTaskMethod, task.releaseRef());
}
void WebWorkerImpl::InvokeTaskMethod(void* param) {
WebCore::ScriptExecutionContext::Task* task =
static_cast<WebCore::ScriptExecutionContext::Task*>(param);
task->performTask(NULL);
task->deref();
}
// WorkerObjectProxy -----------------------------------------------------------
void WebWorkerImpl::postMessageToWorkerObject(const WebCore::String& message) {
DispatchTaskToMainThread(WebCore::createCallbackTask(
&PostMessageTask,
this,
message));
}
void WebWorkerImpl::PostMessageTask(
WebCore::ScriptExecutionContext* context,
WebWorkerImpl* this_ptr,
WebCore::String message) {
this_ptr->client_->postMessageToWorkerObject(
webkit_glue::StringToWebString(message));
}
void WebWorkerImpl::postExceptionToWorkerObject(
const WebCore::String& error_message,
int line_number,
const WebCore::String& source_url) {
DispatchTaskToMainThread(WebCore::createCallbackTask(
&PostExceptionTask,
this,
error_message,
line_number,
source_url));
}
void WebWorkerImpl::PostExceptionTask(
WebCore::ScriptExecutionContext* context,
WebWorkerImpl* this_ptr,
const WebCore::String& error_message,
int line_number,
const WebCore::String& source_url) {
this_ptr->client_->postExceptionToWorkerObject(
webkit_glue::StringToWebString(error_message),
line_number,
webkit_glue::StringToWebString(source_url));
}
void WebWorkerImpl::postConsoleMessageToWorkerObject(
WebCore::MessageDestination destination,
WebCore::MessageSource source,
WebCore::MessageLevel level,
const WebCore::String& message,
int line_number,
const WebCore::String& source_url) {
DispatchTaskToMainThread(WebCore::createCallbackTask(
&PostConsoleMessageTask,
this,
static_cast<int>(destination),
static_cast<int>(source),
static_cast<int>(level),
message,
line_number,
source_url));
}
void WebWorkerImpl::PostConsoleMessageTask(
WebCore::ScriptExecutionContext* context,
WebWorkerImpl* this_ptr,
int destination,
int source,
int level,
const WebCore::String& message,
int line_number,
const WebCore::String& source_url) {
this_ptr->client_->postConsoleMessageToWorkerObject(
destination,
source,
level,
webkit_glue::StringToWebString(message),
line_number,
webkit_glue::StringToWebString(source_url));
}
void WebWorkerImpl::confirmMessageFromWorkerObject(bool has_pending_activity) {
DispatchTaskToMainThread(WebCore::createCallbackTask(
&ConfirmMessageTask,
this,
has_pending_activity));
}
void WebWorkerImpl::ConfirmMessageTask(
WebCore::ScriptExecutionContext* context,
WebWorkerImpl* this_ptr,
bool has_pending_activity) {
this_ptr->client_->confirmMessageFromWorkerObject(has_pending_activity);
}
void WebWorkerImpl::reportPendingActivity(bool has_pending_activity) {
DispatchTaskToMainThread(WebCore::createCallbackTask(
&ReportPendingActivityTask,
this,
has_pending_activity));
}
void WebWorkerImpl::ReportPendingActivityTask(
WebCore::ScriptExecutionContext* context,
WebWorkerImpl* this_ptr,
bool has_pending_activity) {
this_ptr->client_->reportPendingActivity(has_pending_activity);
}
void WebWorkerImpl::workerContextDestroyed() {
DispatchTaskToMainThread(WebCore::createCallbackTask(
&WorkerContextDestroyedTask,
this));
}
void WebWorkerImpl::WorkerContextDestroyedTask(
WebCore::ScriptExecutionContext* context,
WebWorkerImpl* this_ptr) {
this_ptr->client_->workerContextDestroyed();
// The lifetime of this proxy is controlled by the worker context.
delete this_ptr;
}
#else
namespace WebKit {
WebWorker* WebWorker::create(WebWorkerClient* client) {
return NULL;
}
}
#endif
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