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