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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_WorkerEventTarget_h
#define mozilla_dom_WorkerEventTarget_h
#include "nsISerialEventTarget.h"
#include "mozilla/Mutex.h"
#include "mozilla/dom/WorkerPrivate.h"
namespace mozilla::dom {
class WorkerEventTarget final : public nsISerialEventTarget {
public:
// The WorkerEventTarget supports different dispatch behaviors:
//
// * Hybrid targets will attempt to dispatch as a normal runnable,
// but fallback to a control runnable if that fails. This is
// often necessary for code that wants normal dispatch order, but
// also needs to execute while the worker is shutting down (possibly
// with a holder in place.)
//
// * ControlOnly targets will simply dispatch a control runnable.
enum class Behavior : uint8_t { Hybrid, ControlOnly };
private:
mozilla::Mutex mMutex;
CheckedUnsafePtr<WorkerPrivate> mWorkerPrivate MOZ_GUARDED_BY(mMutex);
const Behavior mBehavior MOZ_GUARDED_BY(mMutex);
~WorkerEventTarget() = default;
public:
WorkerEventTarget(WorkerPrivate* aWorkerPrivate, Behavior aBehavior);
void ForgetWorkerPrivate(WorkerPrivate* aWorkerPrivate);
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIEVENTTARGET
NS_DECL_NSISERIALEVENTTARGET
};
} // namespace mozilla::dom
#endif // mozilla_dom_WorkerEventTarget_h
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