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// Copyright (c) 2012 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 "content/worker/worker_thread.h"
#include "base/command_line.h"
#include "base/lazy_instance.h"
#include "base/threading/thread_local.h"
#include "content/child/appcache/appcache_dispatcher.h"
#include "content/child/appcache/appcache_frontend_impl.h"
#include "content/child/db_message_filter.h"
#include "content/child/indexed_db/indexed_db_message_filter.h"
#include "content/child/runtime_features.h"
#include "content/child/web_database_observer_impl.h"
#include "content/common/child_process_messages.h"
#include "content/common/worker_messages.h"
#include "content/public/common/content_switches.h"
#include "content/worker/websharedworker_stub.h"
#include "content/worker/worker_webkitplatformsupport_impl.h"
#include "ipc/ipc_sync_channel.h"
#include "third_party/WebKit/public/platform/WebBlobRegistry.h"
#include "third_party/WebKit/public/web/WebDatabase.h"
#include "third_party/WebKit/public/web/WebKit.h"
#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
#include "webkit/glue/webkit_glue.h"
using blink::WebRuntimeFeatures;
namespace content {
static base::LazyInstance<base::ThreadLocalPointer<WorkerThread> > lazy_tls =
LAZY_INSTANCE_INITIALIZER;
WorkerThread::WorkerThread() {
lazy_tls.Pointer()->Set(this);
webkit_platform_support_.reset(new WorkerWebKitPlatformSupportImpl(
thread_safe_sender(),
sync_message_filter(),
quota_message_filter()));
const CommandLine& command_line = *CommandLine::ForCurrentProcess();
if (command_line.HasSwitch(switches::kJavaScriptFlags)) {
webkit_glue::SetJavaScriptFlags(
command_line.GetSwitchValueASCII(switches::kJavaScriptFlags));
}
SetRuntimeFeaturesDefaultsAndUpdateFromArgs(command_line);
blink::initialize(webkit_platform_support_.get());
appcache_dispatcher_.reset(
new AppCacheDispatcher(this, new AppCacheFrontendImpl()));
db_message_filter_ = new DBMessageFilter();
channel()->AddFilter(db_message_filter_.get());
indexed_db_message_filter_ = new IndexedDBMessageFilter(
thread_safe_sender());
channel()->AddFilter(indexed_db_message_filter_->GetFilter());
}
void WorkerThread::OnShutdown() {
// The worker process is to be shut down gracefully. Ask the browser
// process to shut it down forcefully instead and wait on the message, so that
// there are no races between threads when the process is shutting down.
Send(new WorkerProcessHostMsg_ForceKillWorker());
}
WorkerThread::~WorkerThread() {
}
void WorkerThread::Shutdown() {
ChildThread::Shutdown();
if (webkit_platform_support_) {
webkit_platform_support_->web_database_observer_impl()->
WaitForAllDatabasesToClose();
}
// Shutdown in reverse of the initialization order.
indexed_db_message_filter_ = NULL;
channel()->RemoveFilter(db_message_filter_.get());
db_message_filter_ = NULL;
blink::shutdown();
lazy_tls.Pointer()->Set(NULL);
}
WorkerThread* WorkerThread::current() {
return lazy_tls.Pointer()->Get();
}
bool WorkerThread::OnControlMessageReceived(const IPC::Message& msg) {
// Appcache messages are handled by a delegate.
if (appcache_dispatcher_->OnMessageReceived(msg))
return true;
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(WorkerThread, msg)
IPC_MESSAGE_HANDLER(WorkerProcessMsg_CreateWorker, OnCreateWorker)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
bool WorkerThread::OnMessageReceived(const IPC::Message& msg) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(WorkerThread, msg)
IPC_MESSAGE_HANDLER(ChildProcessMsg_Shutdown, OnShutdown)
IPC_MESSAGE_UNHANDLED(handled = ChildThread::OnMessageReceived(msg))
IPC_END_MESSAGE_MAP()
return handled;
}
void WorkerThread::OnCreateWorker(
const WorkerProcessMsg_CreateWorker_Params& params) {
WorkerAppCacheInitInfo appcache_init_info(
params.creator_process_id,
params.shared_worker_appcache_id);
// WebSharedWorkerStub own themselves.
new WebSharedWorkerStub(
params.url,
params.name,
params.content_security_policy,
params.security_policy_type,
params.route_id,
appcache_init_info);
}
// The browser process is likely dead. Terminate all workers.
void WorkerThread::OnChannelError() {
set_on_channel_error_called(true);
for (WorkerStubsList::iterator it = worker_stubs_.begin();
it != worker_stubs_.end(); ++it) {
(*it)->OnChannelError();
}
}
void WorkerThread::RemoveWorkerStub(WebSharedWorkerStub* stub) {
worker_stubs_.erase(stub);
}
void WorkerThread::AddWorkerStub(WebSharedWorkerStub* stub) {
worker_stubs_.insert(stub);
}
} // namespace content
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