Move base to DEPS

base/files/file_proxy.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef BASE_FILES_FILE_PROXY_H_
-#define BASE_FILES_FILE_PROXY_H_
-
-#include "base/base_export.h"
-#include "base/callback_forward.h"
-#include "base/files/file.h"
-#include "base/files/file_path.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
-
-namespace tracked_objects {
-class Location;
-};
-
-namespace base {
-
-class TaskRunner;
-class Time;
-
-// This class provides asynchronous access to a File. All methods follow the
-// same rules of the equivalent File method, as they are implemented by bouncing
-// the operation to File using a TaskRunner.
-//
-// This class performs automatic proxying to close the underlying file at
-// destruction.
-//
-// The TaskRunner is in charge of any sequencing of the operations, but a single
-// operation can be proxied at a time, regardless of the use of a callback.
-// In other words, having a sequence like
-//
-//   proxy.Write(...);
-//   proxy.Write(...);
-//
-// means the second Write will always fail.
-class BASE_EXPORT FileProxy : public SupportsWeakPtr<FileProxy> {
- public:
-  // This callback is used by methods that report only an error code. It is
-  // valid to pass a null callback to some functions that takes a
-  // StatusCallback, in which case the operation will complete silently.
-  typedef Callback<void(File::Error)> StatusCallback;
-
-  typedef Callback<void(File::Error,
-                        const FilePath&)> CreateTemporaryCallback;
-  typedef Callback<void(File::Error,
-                        const File::Info&)> GetFileInfoCallback;
-  typedef Callback<void(File::Error,
-                        const char* data,
-                        int bytes_read)> ReadCallback;
-  typedef Callback<void(File::Error,
-                        int bytes_written)> WriteCallback;
-
-  FileProxy();
-  explicit FileProxy(TaskRunner* task_runner);
-  ~FileProxy();
-
-  // Creates or opens a file with the given flags. It is invalid to pass a null
-  // callback. If File::FLAG_CREATE is set in |file_flags| it always tries to
-  // create a new file at the given |file_path| and fails if the file already
-  // exists.
-  //
-  // This returns false if task posting to |task_runner| has failed.
-  bool CreateOrOpen(const FilePath& file_path,
-                    uint32 file_flags,
-                    const StatusCallback& callback);
-
-  // Creates a temporary file for writing. The path and an open file are
-  // returned. It is invalid to pass a null callback. The additional file flags
-  // will be added on top of the default file flags which are:
-  //   File::FLAG_CREATE_ALWAYS
-  //   File::FLAG_WRITE
-  //   File::FLAG_TEMPORARY.
-  //
-  // This returns false if task posting to |task_runner| has failed.
-  bool CreateTemporary(uint32 additional_file_flags,
-                       const CreateTemporaryCallback& callback);
-
-  // Returns true if the underlying |file_| is valid.
-  bool IsValid() const;
-
-  // Returns true if a new file was created (or an old one truncated to zero
-  // length to simulate a new file), and false otherwise.
-  bool created() const { return file_.created(); }
-
-  // Claims ownership of |file|. It is an error to call this method when
-  // IsValid() returns true.
-  void SetFile(File file);
-
-  File TakeFile();
-
-  PlatformFile GetPlatformFile() const;
-
-  // Proxies File::Close. The callback can be null.
-  // This returns false if task posting to |task_runner| has failed.
-  bool Close(const StatusCallback& callback);
-
-  // Proxies File::GetInfo. The callback can't be null.
-  // This returns false if task posting to |task_runner| has failed.
-  bool GetInfo(const GetFileInfoCallback& callback);
-
-  // Proxies File::Read. The callback can't be null.
-  // This returns false if |bytes_to_read| is less than zero, or
-  // if task posting to |task_runner| has failed.
-  bool Read(int64 offset, int bytes_to_read, const ReadCallback& callback);
-
-  // Proxies File::Write. The callback can be null.
-  // This returns false if |bytes_to_write| is less than or equal to zero,
-  // if |buffer| is NULL, or if task posting to |task_runner| has failed.
-  bool Write(int64 offset,
-             const char* buffer,
-             int bytes_to_write,
-             const WriteCallback& callback);
-
-  // Proxies File::SetTimes. The callback can be null.
-  // This returns false if task posting to |task_runner| has failed.
-  bool SetTimes(Time last_access_time,
-                Time last_modified_time,
-                const StatusCallback& callback);
-
-  // Proxies File::SetLength. The callback can be null.
-  // This returns false if task posting to |task_runner| has failed.
-  bool SetLength(int64 length, const StatusCallback& callback);
-
-  // Proxies File::Flush. The callback can be null.
-  // This returns false if task posting to |task_runner| has failed.
-  bool Flush(const StatusCallback& callback);
-
- private:
-  friend class FileHelper;
-  TaskRunner* task_runner() { return task_runner_.get(); }
-
-  scoped_refptr<TaskRunner> task_runner_;
-  File file_;
-  DISALLOW_COPY_AND_ASSIGN(FileProxy);
-};
-
-}  // namespace base
-
-#endif  // BASE_FILES_FILE_PROXY_H_