FileInfo.h - mozsearch

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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_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_