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