components/sync/engine/ui_model_worker.h

// Copyright (c) 2012 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 COMPONENTS_SYNC_ENGINE_UI_MODEL_WORKER_H_
#define COMPONENTS_SYNC_ENGINE_UI_MODEL_WORKER_H_

#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/single_thread_task_runner.h"
#include "components/sync/engine/model_safe_worker.h"

namespace syncer {

// A ModelSafeWorker for UI models (e.g. bookmarks) that
// accepts work requests from the syncapi that need to be fulfilled
// from the MessageLoop home to the native model.
class UIModelWorker : public ModelSafeWorker {
 public:
  explicit UIModelWorker(scoped_refptr<base::SingleThreadTaskRunner> ui_thread);

  // ModelSafeWorker implementation.
  ModelSafeGroup GetModelSafeGroup() override;
  bool IsOnModelSequence() override;

 private:
  ~UIModelWorker() override;

  void ScheduleWork(base::OnceClosure work) override;

  // A reference to the UI thread's task runner.
  const scoped_refptr<base::SingleThreadTaskRunner> ui_thread_;

  DISALLOW_COPY_AND_ASSIGN(UIModelWorker);
};

}  // namespace syncer

#endif  // COMPONENTS_SYNC_ENGINE_UI_MODEL_WORKER_H_