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67 lines
2.1 KiB
C++
67 lines
2.1 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef DOM_LOCKS_LOCKREQUESTCHILD_H_
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#define DOM_LOCKS_LOCKREQUESTCHILD_H_
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#include "LockManagerChild.h"
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#include "mozilla/dom/locks/PLockRequestChild.h"
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#include "mozilla/dom/Lock.h"
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#include "mozilla/dom/WorkerRef.h"
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#include "nsISupportsImpl.h"
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namespace mozilla::dom::locks {
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struct LockRequest {
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nsString mName;
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RefPtr<Promise> mPromise;
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RefPtr<LockGrantedCallback> mCallback;
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};
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class LockRequestChild final : public PLockRequestChild,
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public AbortFollower,
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public SupportsWeakPtr {
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using IPCResult = mozilla::ipc::IPCResult;
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NS_DECL_ISUPPORTS
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public:
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explicit LockRequestChild(
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const LockRequest& aRequest,
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const Optional<OwningNonNull<AbortSignal>>& aSignal);
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void MaybeSetWorkerRef();
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// TODO: Use MOZ_CAN_RUN_SCRIPT when it gains IPDL support (bug 1539864)
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MOZ_CAN_RUN_SCRIPT_BOUNDARY IPCResult RecvResolve(const LockMode& aLockMode,
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bool aIsAvailable);
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IPCResult Recv__delete__(bool aAborted);
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void ActorDestroy(ActorDestroyReason aReason) final;
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void RunAbortAlgorithm() final;
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private:
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~LockRequestChild() = default;
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LockManagerChild* CastedManager() const;
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const LockRequest mRequest;
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// This prevents the worker from being GC'ed when the caller is waiting to
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// acquire the lock and when the lock is held.
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//
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// The StrongWorkerRef is dropped immediately in the shutdown notification
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// callback, and thus does not ensure any cleanup before the worker advances
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// to the Killing state. That is ensured instead by
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// LockManagerChild::mWorkerRef, see also the details there.
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RefPtr<StrongWorkerRef> mWorkerRef;
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};
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} // namespace mozilla::dom::locks
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#endif // DOM_LOCKS_LOCKREQUESTCHILD_H_
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