1 files changed, 69 insertions, 0 deletions
diff --git a/dom/indexedDB/FileInfo.h b/dom/indexedDB/FileInfo.h
new file mode 100644
index 0000000000..392ab3c96a
--- /dev/null
+++ b/dom/indexedDB/FileInfo.h
@@ -0,0 +1,69 @@
+/* -*- 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_INDEXEDDB_FILEINFO_H_
+#define DOM_INDEXEDDB_FILEINFO_H_
+
+#include "nsISupportsImpl.h"
+#include "nsCOMPtr.h"
+#include "SafeRefPtr.h"
+
+namespace mozilla::dom::indexedDB {
+
+class FileInfoBase {
+ public:
+  using IdType = int64_t;
+
+  IdType Id() const { return mFileId; }
+
+ protected:
+  explicit FileInfoBase(const int64_t aFileId) : mFileId(aFileId) {
+    MOZ_ASSERT(mFileId > 0);
+  }
+
+ private:
+  const IdType mFileId;
+};
+
+template <typename FileManager>
+class FileInfo final : public FileInfoBase {
+ public:
+  using AutoLockType = typename FileManager::AutoLockType;
+
+  FileInfo(const typename FileManager::FileInfoManagerGuard& aGuard,
+           SafeRefPtr<FileManager> aFileManager, const int64_t aFileId,
+           const nsrefcnt aInitialDBRefCnt = 0);
+
+  void AddRef();
+  void Release(const bool aSyncDeleteFile = false);
+
+  void UpdateDBRefs(int32_t aDelta);
+
+  void GetReferences(int32_t* aRefCnt, int32_t* aDBRefCnt);
+
+  FileManager& Manager() const;
+
+  nsCOMPtr<nsIFile> GetFileForFileInfo() const;
+
+  void LockedAddRef();
+  bool LockedClearDBRefs(
+      const typename FileManager::FileInfoManagerGuard& aGuard);
+
+ private:
+  void UpdateReferences(ThreadSafeAutoRefCnt& aRefCount, int32_t aDelta,
+                        bool aSyncDeleteFile = false);
+
+  void Cleanup();
+
+  ThreadSafeAutoRefCnt mRefCnt;
+  ThreadSafeAutoRefCnt mDBRefCnt;
+
+  const SafeRefPtr<FileManager> mFileManager;
+};
+
+}  // namespace mozilla::dom::indexedDB
+
+#endif  // DOM_INDEXEDDB_FILEINFO_H_