1 files changed, 174 insertions, 0 deletions
diff --git a/dom/fs/parent/datamodel/FileSystemDataManager.h b/dom/fs/parent/datamodel/FileSystemDataManager.h
new file mode 100644
index 0000000000..e23e4dd95b
--- /dev/null
+++ b/dom/fs/parent/datamodel/FileSystemDataManager.h
@@ -0,0 +1,174 @@
+/* -*- 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 FileSystemAccessHandle;
+class FileSystemManagerParent;
+
+namespace fs {
+class FileSystemChildMetadata;
+}  // namespace fs
+
+namespace quota {
+class DirectoryLock;
+class QuotaManager;
+}  // 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,
+                        RefPtr<quota::QuotaManager> aQuotaManager,
+                        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_THREADSAFE_REFCOUNTING(FileSystemDataManager)
+
+  void AssertIsOnIOTarget() const;
+
+  const quota::OriginMetadata& OriginMetadataRef() const {
+    return mOriginMetadata;
+  }
+
+  nsISerialEventTarget* MutableBackgroundTargetPtr() const {
+    return mBackgroundTarget.get();
+  }
+
+  nsIEventTarget* MutableIOTargetPtr() const { return mIOTarget.get(); }
+
+  nsISerialEventTarget* MutableIOTaskQueuePtr() 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);
+
+  void RegisterAccessHandle(NotNull<FileSystemAccessHandle*> aAccessHandle);
+
+  void UnregisterAccessHandle(NotNull<FileSystemAccessHandle*> aAccessHandle);
+
+  bool IsOpen() const { return mState == State::Open; }
+
+  RefPtr<BoolPromise> OnOpen();
+
+  RefPtr<BoolPromise> OnClose();
+
+  bool IsLocked(const EntryId& aEntryId) const;
+
+  nsresult LockExclusive(const EntryId& aEntryId);
+
+  void UnlockExclusive(const EntryId& aEntryId);
+
+  nsresult 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;
+    nsTHashSet<FileSystemAccessHandle*> mAccessHandles;
+  };
+  ThreadBound<BackgroundThreadAccessible> mBackgroundThreadAccessible;
+
+  const quota::OriginMetadata mOriginMetadata;
+  nsTHashSet<EntryId> mExclusiveLocks;
+  nsTHashMap<EntryId, uint32_t> mSharedLocks;
+  NS_DECL_OWNINGEVENTTARGET
+  const RefPtr<quota::QuotaManager> mQuotaManager;
+  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_