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// Copyright 2015 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.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_WORKERS_DEDICATED_WORKER_MESSAGING_PROXY_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_WORKERS_DEDICATED_WORKER_MESSAGING_PROXY_H_
#include <memory>
#include "base/macros.h"
#include "base/memory/scoped_refptr.h"
#include "base/optional.h"
#include "services/network/public/mojom/referrer_policy.mojom-shared.h"
#include "third_party/blink/public/mojom/messaging/transferable_message.mojom-blink.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/messaging/message_port.h"
#include "third_party/blink/renderer/core/workers/global_scope_creation_params.h"
#include "third_party/blink/renderer/core/workers/threaded_messaging_proxy_base.h"
#include "third_party/blink/renderer/core/workers/worker_backing_thread_startup_data.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
namespace blink {
class DedicatedWorker;
class DedicatedWorkerObjectProxy;
class FetchClientSettingsObjectSnapshot;
class WorkerOptions;
// A proxy class to talk to the DedicatedWorkerGlobalScope on a worker thread
// via the DedicatedWorkerMessagingProxy from the main thread. See class
// comments on ThreadedMessagingProxyBase for the lifetime and thread affinity.
class CORE_EXPORT DedicatedWorkerMessagingProxy
: public ThreadedMessagingProxyBase {
public:
DedicatedWorkerMessagingProxy(ExecutionContext*, DedicatedWorker*);
~DedicatedWorkerMessagingProxy() override;
// These methods should only be used on the parent context thread.
void StartWorkerGlobalScope(
std::unique_ptr<GlobalScopeCreationParams>,
const WorkerOptions*,
const KURL& script_url,
FetchClientSettingsObjectSnapshot* outside_settings_object,
const v8_inspector::V8StackTraceId&,
const String& source_code);
void PostMessageToWorkerGlobalScope(BlinkTransferableMessage);
bool HasPendingActivity() const;
// These methods come from worker context thread via
// DedicatedWorkerObjectProxy and are called on the parent context thread.
void DidEvaluateScript(bool success);
void PostMessageToWorkerObject(BlinkTransferableMessage);
void DispatchErrorEvent(const String& error_message,
std::unique_ptr<SourceLocation>,
int exception_id);
DedicatedWorkerObjectProxy& WorkerObjectProxy() {
return *worker_object_proxy_.get();
}
void Trace(blink::Visitor*) override;
private:
friend class DedicatedWorkerMessagingProxyForTest;
base::Optional<WorkerBackingThreadStartupData> CreateBackingThreadStartupData(
v8::Isolate*);
std::unique_ptr<WorkerThread> CreateWorkerThread() override;
std::unique_ptr<DedicatedWorkerObjectProxy> worker_object_proxy_;
// This must be weak. The base class (i.e., ThreadedMessagingProxyBase) has a
// strong persistent reference to itself via SelfKeepAlive (see class-level
// comments on ThreadedMessagingProxyBase.h for details). To cut the
// persistent reference, this worker object needs to call a cleanup function
// in its dtor. If this is a strong reference, the dtor is never called
// because the worker object is reachable from the persistent reference.
WeakMember<DedicatedWorker> worker_object_;
// Set once the initial script evaluation has been completed and it's ready
// to dispatch events (e.g., Message events) on the worker global scope.
bool was_script_evaluated_ = false;
// Tasks are queued here until worker scripts are evaluated on the worker
// global scope.
Vector<BlinkTransferableMessage> queued_early_tasks_;
DISALLOW_COPY_AND_ASSIGN(DedicatedWorkerMessagingProxy);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_WORKERS_DEDICATED_WORKER_MESSAGING_PROXY_H_
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