dom/indexedDB/FileInfoImpl.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_FILEINFOIMPL_H_
   8 #define DOM_INDEXEDDB_FILEINFOIMPL_H_
   9
  10 #include "FileInfo.h"
  11
  12 #include "mozilla/dom/QMResult.h"
  13 #include "mozilla/dom/quota/QuotaCommon.h"
  14 #include "mozilla/dom/quota/ResultExtensions.h"
  15 #include "mozilla/Mutex.h"
  16 #include "nsIFile.h"
  17
  18 namespace mozilla::dom::indexedDB {
  19
  20 template <typename FileManager>
  21 FileInfo<FileManager>::FileInfo(
  22     const typename FileManager::FileInfoManagerGuard& aGuard,
  23     SafeRefPtr<FileManager> aFileManager, const int64_t aFileId,
  24     const nsrefcnt aInitialDBRefCnt)
  25     : FileInfoBase{aFileId},
  26       mDBRefCnt(aInitialDBRefCnt),
  27       mFileManager(std::move(aFileManager)) {
  28   MOZ_ASSERT(mFileManager);
  29 }
  30
  31 template <typename FileManager>
  32 void FileInfo<FileManager>::AddRef() {
  33   AutoLockType lock(FileManager::Mutex());
  34
  35   LockedAddRef();
  36 }
  37
  38 template <typename FileManager>
  39 void FileInfo<FileManager>::Release(const bool aSyncDeleteFile) {
  40   UpdateReferences(mRefCnt, -1, aSyncDeleteFile);
  41 }
  42
  43 template <typename FileManager>
  44 void FileInfo<FileManager>::UpdateDBRefs(int32_t aDelta) {
  45   UpdateReferences(mDBRefCnt, aDelta);
  46 }
  47
  48 template <typename FileManager>
  49 void FileInfo<FileManager>::GetReferences(int32_t* const aRefCnt,
  50                                           int32_t* const aDBRefCnt) {
  51   AutoLockType lock(FileManager::Mutex());
  52
  53   if (aRefCnt) {
  54     *aRefCnt = mRefCnt;
  55   }
  56
  57   if (aDBRefCnt) {
  58     *aDBRefCnt = mDBRefCnt;
  59   }
  60 }
  61
  62 template <typename FileManager>
  63 FileManager& FileInfo<FileManager>::Manager() const {
  64   return *mFileManager;
  65 }
  66
  67 template <typename FileManager>
  68 void FileInfo<FileManager>::UpdateReferences(ThreadSafeAutoRefCnt& aRefCount,
  69                                              const int32_t aDelta,
  70                                              const bool aSyncDeleteFile) {
  71   bool needsCleanup;
  72   {
  73     AutoLockType lock(FileManager::Mutex());
  74
  75     aRefCount = aRefCount + aDelta;
  76
  77     if (mRefCnt + mDBRefCnt > 0) {
  78       return;
  79     }
  80
  81     mFileManager->RemoveFileInfo(Id(), lock);
  82
  83     // If the FileManager was already invalidated, we don't need to do any
  84     // cleanup anymore. In that case, the entire origin directory has already
  85     // been deleted by the quota manager, and we don't need to delete individual
  86     // files.
  87     needsCleanup = !mFileManager->Invalidated();
  88   }
  89
  90   if (needsCleanup) {
  91     if (aSyncDeleteFile) {
  92       QM_WARNONLY_TRY(QM_TO_RESULT(mFileManager->SyncDeleteFile(Id())));
  93     } else {
  94       Cleanup();
  95     }
  96   }
  97
  98   delete this;
  99 }
 100
 101 template <typename FileManager>
 102 void FileInfo<FileManager>::LockedAddRef() {
 103   FileManager::Mutex().AssertCurrentThreadOwns();
 104
 105   ++mRefCnt;
 106 }
 107
 108 template <typename FileManager>
 109 bool FileInfo<FileManager>::LockedClearDBRefs(
 110     const typename FileManager::FileInfoManagerGuard&) {
 111   FileManager::Mutex().AssertCurrentThreadOwns();
 112
 113   mDBRefCnt = 0;
 114
 115   if (mRefCnt) {
 116     return true;
 117   }
 118
 119   // In this case, we are not responsible for removing the FileInfo from the
 120   // hashtable. It's up to FileManager which is the only caller of this method.
 121
 122   MOZ_ASSERT(mFileManager->Invalidated());
 123
 124   delete this;
 125
 126   return false;
 127 }
 128
 129 template <typename FileManager>
 130 void FileInfo<FileManager>::Cleanup() {
 131   QM_WARNONLY_TRY(QM_TO_RESULT(mFileManager->AsyncDeleteFile(Id())));
 132 }
 133
 134 template <typename FileManager>
 135 nsCOMPtr<nsIFile> FileInfo<FileManager>::GetFileForFileInfo() const {
 136   const nsCOMPtr<nsIFile> directory = Manager().GetDirectory();
 137   if (NS_WARN_IF(!directory)) {
 138     return nullptr;
 139   }
 140
 141   nsCOMPtr<nsIFile> file = FileManager::GetFileForId(directory, Id());
 142   if (NS_WARN_IF(!file)) {
 143     return nullptr;
 144   }
 145
 146   return file;
 147 }
 148
 149 }  // namespace mozilla::dom::indexedDB
 150
 151 #endif  // DOM_INDEXEDDB_FILEINFOIMPL_H_