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// Copyright (c) 2010 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_FILE_SYSTEM_PROXY_H_
#define BASE_FILE_SYSTEM_PROXY_H_
#include "base/callback.h"
#include "base/platform_file.h"
#include "base/ref_counted.h"
#include "base/tracked_objects.h"
namespace file_util {
struct FileInfo;
}
namespace base {
class MessageLoopProxy;
// This class provides asynchronous access to common file routines.
class FileUtilProxy {
public:
// This callback is used by methods that report only an error code. It is
// valid to pass NULL as the callback parameter to any function that takes a
// StatusCallback, in which case the operation will complete silently.
typedef Callback1<int /* error code */>::Type StatusCallback;
// Creates or opens a file with the given flags. It is invalid to pass NULL
// for the callback.
typedef Callback3<int /* error code */, base::PassPlatformFile,
bool /* created */>::Type CreateOrOpenCallback;
static bool CreateOrOpen(scoped_refptr<MessageLoopProxy> message_loop_proxy,
const FilePath& file_path,
int file_flags,
CreateOrOpenCallback* callback);
// Creates a temporary file for writing. The path and an open file handle
// are returned. It is invalid to pass NULL for the callback.
typedef Callback3<int /* error code */, base::PassPlatformFile,
FilePath>::Type CreateTemporaryCallback;
static bool CreateTemporary(
scoped_refptr<MessageLoopProxy> message_loop_proxy,
CreateTemporaryCallback* callback);
// Close the given file handle.
static bool Close(scoped_refptr<MessageLoopProxy> message_loop_proxy,
base::PlatformFile,
StatusCallback* callback);
// Deletes a file or empty directory.
static bool Delete(scoped_refptr<MessageLoopProxy> message_loop_proxy,
const FilePath& file_path,
StatusCallback* callback);
// Deletes a directory and all of its contents.
static bool RecursiveDelete(
scoped_refptr<MessageLoopProxy> message_loop_proxy,
const FilePath& file_path,
StatusCallback* callback);
// Retrieves the information about a file. It is invalid to pass NULL for the
// callback.
typedef Callback2<bool /*exists*/,
const file_util::FileInfo& /*file_info*/
>::Type GetFileInfoCallback;
static bool GetFileInfo(
scoped_refptr<MessageLoopProxy> message_loop_proxy,
const FilePath& file_path,
GetFileInfoCallback* callback);
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(FileUtilProxy);
};
} // namespace base
#endif // BASE_FILE_SYSTEM_PROXY_H_
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