chromium/base/files/file_proxy.h

// Copyright 2014 The Chromium Authors
// 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 <stdint.h>

#include "base/base_export.h"
#include "base/containers/span.h"
#include "base/files/file.h"
#include "base/files/file_path.h"
#include "base/functional/callback_forward.h"
#include "base/memory/weak_ptr.h"

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 final { … };

}  // namespace base

#endif  // BASE_FILES_FILE_PROXY_H_