gecko-dev/dom/workers/WorkerEventTarget.h

57 lines
1.5 KiB
C++

/* -*- 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"
namespace mozilla {
namespace dom {
class WorkerPrivate;
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;
WorkerPrivate* mWorkerPrivate;
const Behavior mBehavior;
~WorkerEventTarget() = default;
public:
WorkerEventTarget(WorkerPrivate* aWorkerPrivate, Behavior aBehavior);
void
ForgetWorkerPrivate(WorkerPrivate* aWorkerPrivate);
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIEVENTTARGET
NS_DECL_NSISERIALEVENTTARGET
};
} // dom namespace
} // mozilla namespace
#endif // mozilla_dom_WorkerEventTarget_h