LevelDB: Using base::File for all file I/O

third_party/leveldatabase/env_chromium_stdio.h

-// Copyright (c) 2013 The LevelDB Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file. See the AUTHORS file for names of contributors.
-
-#ifndef THIRD_PARTY_LEVELDATABASE_ENV_CHROMIUM_STDIO_H_
-#define THIRD_PARTY_LEVELDATABASE_ENV_CHROMIUM_STDIO_H_
-
-#include <string>
-#include <vector>
-
-#include "third_party/leveldatabase/env_chromium.h"
-
-namespace leveldb_env {
-
-class ChromiumWritableFile : public leveldb::WritableFile {
- public:
-  ChromiumWritableFile(const std::string& fname,
-                       FILE* f,
-                       const UMALogger* uma_logger,
-                       WriteTracker* tracker,
-                       bool make_backup);
-  virtual ~ChromiumWritableFile();
-  virtual leveldb::Status Append(const leveldb::Slice& data);
-  virtual leveldb::Status Close();
-  virtual leveldb::Status Flush();
-  virtual leveldb::Status Sync();
-
- private:
-  enum Type {
-    kManifest,
-    kTable,
-    kOther
-  };
-  leveldb::Status SyncParent();
-
-  std::string filename_;
-  FILE* file_;
-  const UMALogger* uma_logger_;
-  WriteTracker* tracker_;
-  Type file_type_;
-  std::string parent_dir_;
-  bool make_backup_;
-};
-
-class ChromiumEnvStdio : public ChromiumEnv {
- public:
-  ChromiumEnvStdio();
-  virtual ~ChromiumEnvStdio();
-
-  virtual leveldb::Status NewSequentialFile(const std::string& fname,
-                                            leveldb::SequentialFile** result);
-  virtual leveldb::Status NewRandomAccessFile(
-      const std::string& fname,
-      leveldb::RandomAccessFile** result);
-  virtual leveldb::Status NewWritableFile(const std::string& fname,
-                                          leveldb::WritableFile** result);
-  virtual leveldb::Status NewLogger(const std::string& fname,
-                                    leveldb::Logger** result);
-
- protected:
-  virtual base::File::Error GetDirectoryEntries(
-      const base::FilePath& dir_param,
-      std::vector<base::FilePath>* result) const;
-
- private:
-  // BGThread() is the body of the background thread
-  void BGThread();
-  static void BGThreadWrapper(void* arg) {
-    reinterpret_cast<ChromiumEnvStdio*>(arg)->BGThread();
-  }
-  void RecordOpenFilesLimit(const std::string& type);
-};
-
-}  // namespace leveldb_env
-
-#endif  // THIRD_PARTY_LEVELDATABASE_ENV_CHROMIUM_STDIO_H_