a101699f29
This patch also cleanups the StorageManager public interface a bit. Differential Revision: https://phabricator.services.mozilla.com/D164453
90 lines
2.9 KiB
C++
90 lines
2.9 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef DOM_FS_CHILD_FILESYSTEMMANAGER_H_
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#define DOM_FS_CHILD_FILESYSTEMMANAGER_H_
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#include <functional>
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#include "mozilla/MozPromise.h"
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#include "mozilla/UniquePtr.h"
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#include "mozilla/dom/FlippedOnce.h"
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#include "mozilla/dom/quota/ForwardDecls.h"
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#include "nsCOMPtr.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsISupports.h"
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class nsIGlobalObject;
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namespace mozilla {
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class ErrorResult;
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namespace dom {
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class FileSystemManagerChild;
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class FileSystemBackgroundRequestHandler;
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class StorageManager;
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namespace fs {
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class FileSystemRequestHandler;
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} // namespace fs
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// `FileSystemManager` is supposed to be held by `StorageManager` and thus
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// there should always be only one `FileSystemManager` per `nsIGlobalObject`.
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// `FileSystemManager` is responsible for creating and eventually caching
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// `FileSystemManagerChild` which is required for communication with the parent
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// process. `FileSystemHandle` is also expected to hold `FileSystemManager`,
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// but it should never clear the strong reference during cycle collection's
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// unlink phase to keep the actor alive. `FileSystemSyncAccessHandle` and
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// `FileSystemWritableFileStream` are also expected to hold `FileSystemManager`,
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// and they shouldn't clear the strong reference during cycle collection's
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// unlink phase as well even though they have their own actor. Those actors
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// are managed by the top level actor, so if the top level actor is destroyed,
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// the whole chain of managed actors would be destroyed as well.
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class FileSystemManager : public nsISupports {
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public:
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FileSystemManager(
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nsIGlobalObject* aGlobal, RefPtr<StorageManager> aStorageManager,
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RefPtr<FileSystemBackgroundRequestHandler> aBackgroundRequestHandler);
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FileSystemManager(nsIGlobalObject* aGlobal,
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RefPtr<StorageManager> aStorageManager);
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_CLASS(FileSystemManager)
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bool IsShutdown() const { return mShutdown; }
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void Shutdown();
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void BeginRequest(
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std::function<void(const RefPtr<FileSystemManagerChild>&)>&& aSuccess,
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std::function<void(nsresult)>&& aFailure);
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already_AddRefed<Promise> GetDirectory(ErrorResult& aError);
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private:
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virtual ~FileSystemManager();
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nsCOMPtr<nsIGlobalObject> mGlobal;
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RefPtr<StorageManager> mStorageManager;
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const RefPtr<FileSystemBackgroundRequestHandler> mBackgroundRequestHandler;
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const UniquePtr<fs::FileSystemRequestHandler> mRequestHandler;
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MozPromiseRequestHolder<BoolPromise>
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mCreateFileSystemManagerChildPromiseRequestHolder;
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FlippedOnce<false> mShutdown;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // DOM_FS_CHILD_FILESYSTEMMANAGER_H_
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