sync_task_token.h revision a1401311d1ab56c4ed0a474bd38c108f75cb0cd9 
1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_TOKEN_H_
6#define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_TOKEN_H_
7
8#include "base/callback.h"
9#include "base/location.h"
10#include "base/memory/scoped_ptr.h"
11#include "base/memory/weak_ptr.h"
12#include "chrome/browser/sync_file_system/sync_callbacks.h"
13
14namespace sync_file_system {
15namespace drive_backend {
16
17class SyncTaskManager;
18
19// Represents a running sequence of SyncTasks.  Owned by a callback chain that
20// should run exclusively, and held by SyncTaskManager when no task is running.
21class SyncTaskToken {
22 public:
23  explicit SyncTaskToken(const base::WeakPtr<SyncTaskManager>& manager);
24
25  void UpdateTask(const tracked_objects::Location& location,
26                  const SyncStatusCallback& callback);
27
28  const tracked_objects::Location& location() const { return location_; }
29  ~SyncTaskToken();
30
31  SyncTaskManager* manager() { return manager_.get(); }
32  const SyncStatusCallback& callback() { return callback_; }
33  void clear_callback() { callback_.Reset(); }
34
35  static SyncStatusCallback WrapToCallback(scoped_ptr<SyncTaskToken> token);
36
37 private:
38  base::WeakPtr<SyncTaskManager> manager_;
39  tracked_objects::Location location_;
40  SyncStatusCallback callback_;
41
42  DISALLOW_COPY_AND_ASSIGN(SyncTaskToken);
43};
44
45
46}  // namespace drive_backend
47}  // namespace sync_file_system
48
49#endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_TOKEN_H_
50