chromium/chrome/browser/sync_file_system/drive_backend/callback_tracker.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 CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CALLBACK_TRACKER_H_
#define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CALLBACK_TRACKER_H_

#include <map>

#include "base/functional/bind.h"
#include "base/functional/callback_forward.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/sync_file_system/drive_backend/callback_tracker_internal.h"

namespace sync_file_system {
namespace drive_backend {

// A helper class to ensure one-shot callback to be called exactly once.
//
// Usage:
//   class Foo {
//    private:
//     CallbackTracker callback_tracker_;
//   };
//
//   void DoSomethingAsync(const SomeCallbackType& callback) {
//     base::OnceClosure abort_case_handler =
//         base::BindOnce(callback, ABORT_ERROR);
//
//     SomeCallbackType wrapped_callback =
//         callback_tracker_.Register(
//             abort_case_handler, callback);
//
//     // The body of the operation goes here.
//   }
class CallbackTracker { … };

}  // namespace drive_backend
}  // namespace sync_file_system

#endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CALLBACK_TRACKER_H_