storage/common/fileapi/file_system_mount_option.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef STORAGE_COMMON_FILEAPI_FILE_SYSTEM_MOUNT_OPTION_H_
   6 #define STORAGE_COMMON_FILEAPI_FILE_SYSTEM_MOUNT_OPTION_H_
   7
   8 namespace storage {
   9
  10 // Option for specifying if flush or disk sync operation is wanted after
  11 // writing.
  12 enum class FlushPolicy {
  13   // No flushing is required after a writing operation is completed.
  14   FLUSH_ON_COMPLETION,
  15
  16   // Flushing is required in order to commit written data. Note, that syncing
  17   // is only invoked via FileStreamWriter::Flush() and via base::File::Flush()
  18   // for native files. Hence, syncing will not be performed for copying within
  19   // non-native file systems as well as for non-native copies performed with
  20   // snapshots.
  21   NO_FLUSH_ON_COMPLETION
  22 };
  23
  24 // Conveys options for a mounted file systems.
  25 class FileSystemMountOption {
  26  public:
  27   // Constructs with the default options.
  28   FileSystemMountOption()
  29       : flush_policy_(FlushPolicy::NO_FLUSH_ON_COMPLETION) {}
  30
  31   // Constructs with the specified component.
  32   explicit FileSystemMountOption(FlushPolicy flush_policy)
  33       : flush_policy_(flush_policy) {}
  34
  35   FlushPolicy flush_policy() const { return flush_policy_; }
  36
  37  private:
  38   FlushPolicy flush_policy_;
  39 };
  40
  41 }  // namespace storage
  42
  43 #endif  // STORAGE_COMMON_FILEAPI_FILE_SYSTEM_MOUNT_OPTION_H_