forked from mirrors/gecko-dev
8cdcee4307
DirectTask dispatching will now be directly handled by nsThread. Differential Revision: https://phabricator.services.mozilla.com/D79085
108 lines
3.1 KiB
C++
108 lines
3.1 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_workers_WorkerThread_h__
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#define mozilla_dom_workers_WorkerThread_h__
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#include "mozilla/Attributes.h"
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#include "mozilla/CondVar.h"
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#include "mozilla/DebugOnly.h"
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#include "mozilla/dom/SafeRefPtr.h"
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#include "nsISupportsImpl.h"
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#include "mozilla/RefPtr.h"
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#include "nsThread.h"
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class nsIRunnable;
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namespace mozilla {
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namespace dom {
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class WorkerRunnable;
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class WorkerPrivate;
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template <class>
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class WorkerPrivateParent;
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namespace workerinternals {
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class RuntimeService;
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}
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// This class lets us restrict the public methods that can be called on
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// WorkerThread to RuntimeService and WorkerPrivate without letting them gain
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// full access to private methods (as would happen if they were simply friends).
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class WorkerThreadFriendKey {
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friend class workerinternals::RuntimeService;
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friend class WorkerPrivate;
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friend class WorkerPrivateParent<WorkerPrivate>;
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WorkerThreadFriendKey();
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~WorkerThreadFriendKey();
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};
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class WorkerThread final : public nsThread {
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class Observer;
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Mutex mLock;
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CondVar mWorkerPrivateCondVar;
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// Protected by nsThread::mLock.
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WorkerPrivate* mWorkerPrivate;
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// Only touched on the target thread.
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RefPtr<Observer> mObserver;
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// Protected by nsThread::mLock and waited on with mWorkerPrivateCondVar.
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uint32_t mOtherThreadsDispatchingViaEventTarget;
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#ifdef DEBUG
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// Protected by nsThread::mLock.
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bool mAcceptingNonWorkerRunnables;
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#endif
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// Using this struct we restrict access to the constructor while still being
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// able to use MakeSafeRefPtr.
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struct ConstructorKey {};
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public:
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explicit WorkerThread(ConstructorKey);
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static SafeRefPtr<WorkerThread> Create(const WorkerThreadFriendKey& aKey);
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void SetWorker(const WorkerThreadFriendKey& aKey,
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WorkerPrivate* aWorkerPrivate);
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nsresult DispatchPrimaryRunnable(const WorkerThreadFriendKey& aKey,
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already_AddRefed<nsIRunnable> aRunnable);
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nsresult DispatchAnyThread(const WorkerThreadFriendKey& aKey,
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already_AddRefed<WorkerRunnable> aWorkerRunnable);
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uint32_t RecursionDepth(const WorkerThreadFriendKey& aKey) const;
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PerformanceCounter* GetPerformanceCounter(nsIRunnable* aEvent) const override;
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NS_INLINE_DECL_REFCOUNTING_INHERITED(WorkerThread, nsThread)
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private:
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~WorkerThread();
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// This should only be called by consumers that have an
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// nsIEventTarget/nsIThread pointer.
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NS_IMETHOD
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Dispatch(already_AddRefed<nsIRunnable> aRunnable, uint32_t aFlags) override;
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NS_IMETHOD
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DispatchFromScript(nsIRunnable* aRunnable, uint32_t aFlags) override;
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NS_IMETHOD
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DelayedDispatch(already_AddRefed<nsIRunnable>, uint32_t) override;
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void IncrementDispatchCounter();
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_workers_WorkerThread_h__
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