dom/indexedDB/FileInfo.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef DOM_INDEXEDDB_FILEINFO_H_
   8 #define DOM_INDEXEDDB_FILEINFO_H_
   9
  10 #include "nsISupportsImpl.h"
  11 #include "nsCOMPtr.h"
  12 #include "SafeRefPtr.h"
  13
  14 namespace mozilla::dom::indexedDB {
  15
  16 class FileInfoBase {
  17  public:
  18   using IdType = int64_t;
  19
  20   IdType Id() const { return mFileId; }
  21
  22  protected:
  23   explicit FileInfoBase(const int64_t aFileId) : mFileId(aFileId) {
  24     MOZ_ASSERT(mFileId > 0);
  25   }
  26
  27  private:
  28   const IdType mFileId;
  29 };
  30
  31 template <typename FileManager>
  32 class FileInfo final : public FileInfoBase {
  33  public:
  34   using AutoLockType = typename FileManager::AutoLockType;
  35
  36   FileInfo(const typename FileManager::FileInfoManagerGuard& aGuard,
  37            SafeRefPtr<FileManager> aFileManager, const int64_t aFileId,
  38            const nsrefcnt aInitialDBRefCnt = 0);
  39
  40   void AddRef();
  41   void Release(const bool aSyncDeleteFile = false);
  42
  43   void UpdateDBRefs(int32_t aDelta);
  44
  45   void GetReferences(int32_t* aRefCnt, int32_t* aDBRefCnt);
  46
  47   FileManager& Manager() const;
  48
  49   nsCOMPtr<nsIFile> GetFileForFileInfo() const;
  50
  51   void LockedAddRef();
  52   bool LockedClearDBRefs(
  53       const typename FileManager::FileInfoManagerGuard& aGuard);
  54
  55  private:
  56   void UpdateReferences(ThreadSafeAutoRefCnt& aRefCount, int32_t aDelta,
  57                         bool aSyncDeleteFile = false);
  58
  59   void Cleanup();
  60
  61   ThreadSafeAutoRefCnt mRefCnt;
  62   ThreadSafeAutoRefCnt mDBRefCnt;
  63
  64   const SafeRefPtr<FileManager> mFileManager;
  65 };
  66
  67 }  // namespace mozilla::dom::indexedDB
  68
  69 #endif  // DOM_INDEXEDDB_FILEINFO_H_