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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_FS_PARENT_DATAMODEL_FILESYSTEMDATAMANAGER_H_
#define DOM_FS_PARENT_DATAMODEL_FILESYSTEMDATAMANAGER_H_
#include "ResultConnection.h"
#include "mozilla/NotNull.h"
#include "mozilla/TaskQueue.h"
#include "mozilla/ThreadBound.h"
#include "mozilla/dom/FileSystemHelpers.h"
#include "mozilla/dom/FileSystemTypes.h"
#include "mozilla/dom/quota/CheckedUnsafePtr.h"
#include "mozilla/dom/quota/CommonMetadata.h"
#include "mozilla/dom/quota/ForwardDecls.h"
#include "nsCOMPtr.h"
#include "nsISupportsUtils.h"
#include "nsString.h"
#include "nsTHashSet.h"
namespace mozilla {
template <typename V, typename E>
class Result;
namespace dom {
class FileSystemManagerParent;
namespace fs {
class FileSystemChildMetadata;
} // namespace fs
namespace quota {
class DirectoryLock;
} // namespace quota
namespace fs::data {
class FileSystemDatabaseManager;
Result<EntryId, QMResult> GetRootHandle(const Origin& origin);
Result<EntryId, QMResult> GetEntryHandle(
const FileSystemChildMetadata& aHandle);
class FileSystemDataManager
: public SupportsCheckedUnsafePtr<CheckIf<DiagnosticAssertEnabled>> {
public:
enum struct State : uint8_t { Initial = 0, Opening, Open, Closing, Closed };
FileSystemDataManager(const quota::OriginMetadata& aOriginMetadata,
MovingNotNull<nsCOMPtr<nsIEventTarget>> aIOTarget,
MovingNotNull<RefPtr<TaskQueue>> aIOTaskQueue);
// IsExclusive is true because we want to allow the move operations. There's
// always just one consumer anyway.
using CreatePromise = MozPromise<Registered<FileSystemDataManager>, nsresult,
/* IsExclusive */ true>;
static RefPtr<CreatePromise> GetOrCreateFileSystemDataManager(
const quota::OriginMetadata& aOriginMetadata);
static void AbortOperationsForLocks(
const quota::Client::DirectoryLockIdTable& aDirectoryLockIds);
static void InitiateShutdown();
static bool IsShutdownCompleted();
NS_INLINE_DECL_REFCOUNTING(FileSystemDataManager)
void AssertIsOnIOTarget() const;
const quota::OriginMetadata& OriginMetadataRef() const {
return mOriginMetadata;
}
nsISerialEventTarget* MutableBackgroundTargetPtr() const {
return mBackgroundTarget.get();
}
nsISerialEventTarget* MutableIOTargetPtr() const {
return mIOTaskQueue.get();
}
Maybe<quota::DirectoryLock&> MaybeDirectoryLockRef() const {
return ToMaybeRef(mDirectoryLock.get());
}
FileSystemDatabaseManager* MutableDatabaseManagerPtr() const {
MOZ_ASSERT(mDatabaseManager);
return mDatabaseManager.get();
}
void Register();
void Unregister();
void RegisterActor(NotNull<FileSystemManagerParent*> aActor);
void UnregisterActor(NotNull<FileSystemManagerParent*> aActor);
bool IsOpen() const { return mState == State::Open; }
RefPtr<BoolPromise> OnOpen();
RefPtr<BoolPromise> OnClose();
bool IsLocked(const EntryId& aEntryId) const;
bool LockExclusive(const EntryId& aEntryId);
void UnlockExclusive(const EntryId& aEntryId);
bool LockShared(const EntryId& aEntryId);
void UnlockShared(const EntryId& aEntryId);
protected:
virtual ~FileSystemDataManager();
bool IsInactive() const;
bool IsOpening() const { return mState == State::Opening; }
bool IsClosing() const { return mState == State::Closing; }
void RequestAllowToClose();
RefPtr<BoolPromise> BeginOpen();
RefPtr<BoolPromise> BeginClose();
// Things touched on background thread only.
struct BackgroundThreadAccessible {
nsTHashSet<FileSystemManagerParent*> mActors;
};
ThreadBound<BackgroundThreadAccessible> mBackgroundThreadAccessible;
const quota::OriginMetadata mOriginMetadata;
nsTHashSet<EntryId> mExclusiveLocks;
const NotNull<nsCOMPtr<nsISerialEventTarget>> mBackgroundTarget;
const NotNull<nsCOMPtr<nsIEventTarget>> mIOTarget;
const NotNull<RefPtr<TaskQueue>> mIOTaskQueue;
RefPtr<quota::DirectoryLock> mDirectoryLock;
UniquePtr<FileSystemDatabaseManager> mDatabaseManager;
MozPromiseHolder<BoolPromise> mOpenPromiseHolder;
MozPromiseHolder<BoolPromise> mClosePromiseHolder;
uint32_t mRegCount;
State mState;
};
} // namespace fs::data
} // namespace dom
} // namespace mozilla
#endif // DOM_FS_PARENT_DATAMODEL_FILESYSTEMDATAMANAGER_H_
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