UniqueContentParentKeepAlive.h

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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 mozilla_dom_UniqueContentParentKeepAlive_h

#define mozilla_dom_UniqueContentParentKeepAlive_h

#include "mozilla/RefPtr.h"

#include "mozilla/UniquePtr.h"

namespace mozilla::dom {

class ContentParent;

class ThreadsafeContentParentHandle;

struct ContentParentKeepAliveDeleter {

  void operator()(ContentParent* aProcess);

  void operator()(ThreadsafeContentParentHandle* aHandle);

  uint64_t mBrowserId = 0;

};

// Helper for managing a ContentParent combined with the KeepAlive which is

// keeping it alive for use by a specific BrowserId.

//

// This generally should not be created directly, but rather should be created

// using `ContentParent::AddKeepAlive`.

using UniqueContentParentKeepAlive =

    UniquePtr<ContentParent, ContentParentKeepAliveDeleter>;

using UniqueThreadsafeContentParentKeepAlive =

    UniquePtr<ThreadsafeContentParentHandle, ContentParentKeepAliveDeleter>;

UniqueContentParentKeepAlive UniqueContentParentKeepAliveFromThreadsafe(

    UniqueThreadsafeContentParentKeepAlive aKeepAlive);

UniqueThreadsafeContentParentKeepAlive UniqueContentParentKeepAliveToThreadsafe(

    UniqueContentParentKeepAlive aKeepAlive);

}  // namespace mozilla::dom

#endif  // mozilla_dom_UniqueContentParentKeepAlive_h