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64 lines
2.3 KiB
C++
64 lines
2.3 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef DOM_LOCKS_LOCKMANAGERCHILD_H_
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#define DOM_LOCKS_LOCKMANAGERCHILD_H_
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#include "mozilla/dom/locks/PLockManagerChild.h"
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#include "mozilla/dom/Promise.h"
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#include "mozilla/dom/WorkerRef.h"
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#include "nsIUUIDGenerator.h"
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namespace mozilla::dom::locks {
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struct LockRequest;
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class LockManagerChild final : public PLockManagerChild {
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public:
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NS_INLINE_DECL_REFCOUNTING(LockManagerChild)
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static void NotifyBFCacheOnMainThread(nsPIDOMWindowInner* aInner,
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bool aCreated);
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explicit LockManagerChild(nsIGlobalObject* aOwner);
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nsIGlobalObject* GetParentObject() const { return mOwner; };
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void RequestLock(const LockRequest& aRequest, const LockOptions& aOptions);
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void NotifyRequestDestroy() const;
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void NotifyToWindow(bool aCreated) const;
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private:
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~LockManagerChild() = default;
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nsCOMPtr<nsIGlobalObject> mOwner;
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// This WorkerRef is deleted by destructor.
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//
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// Here we want to make sure the IPC layer deletes the actor before allowing
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// WorkerPrivate deletion, since managed LockRequestChild holds a reference to
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// global object (currently via mRequest member variable) and thus deleting
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// the worker first causes an assertion failure. Having this ensures that all
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// LockRequestChild instances must first have been deleted.
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//
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// (Because each LockRequestChild's ActorLifecycleProxy will hold
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// a strong reference to its manager LockManagerChild's ActorLifecycleProxy,
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// which means that the LockManagerChild will only be destroyed once all
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// LockRequestChild instances have been destroyed. At that point, all
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// references to the global should have been dropped, and then the
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// LockManagerChild IPCWorkerRef will be dropped and the worker will be able
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// to transition to the Killing state.)
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//
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// ActorDestroy can't release this since it does not guarantee to destruct and
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// GC the managees (LockRequestChild) immediately.
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RefPtr<IPCWorkerRef> mWorkerRef;
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};
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} // namespace mozilla::dom::locks
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#endif // DOM_LOCKS_LOCKMANAGERCHILD_H_
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