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