sync_task_token.h revision 0529e5d033099cbfc42635f6f6183833b09dff6e 
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;
18struct BlockingFactor;
19
20// Represents a running sequence of SyncTasks.  Owned by a callback chain that
21// should run exclusively, and held by SyncTaskManager when no task is running.
22class SyncTaskToken {
23 public:
24  static const int64 kForegroundTaskTokenID;
25  static const int64 kMinimumBackgroundTaskTokenID;
26
27  static scoped_ptr<SyncTaskToken> CreateForForegroundTask(
28      const base::WeakPtr<SyncTaskManager>& manager);
29  static scoped_ptr<SyncTaskToken> CreateForBackgroundTask(
30      const base::WeakPtr<SyncTaskManager>& manager,
31      int64 token_id,
32      scoped_ptr<BlockingFactor> blocking_factor);
33
34  void UpdateTask(const tracked_objects::Location& location,
35                  const SyncStatusCallback& callback);
36
37  const tracked_objects::Location& location() const { return location_; }
38  virtual ~SyncTaskToken();
39
40  static SyncStatusCallback WrapToCallback(scoped_ptr<SyncTaskToken> token);
41
42  SyncTaskManager* manager() { return manager_.get(); }
43
44  const SyncStatusCallback& callback() const { return callback_; }
45  void clear_callback() { callback_.Reset(); }
46
47  void set_blocking_factor(scoped_ptr<BlockingFactor> blocking_factor);
48  const BlockingFactor* blocking_factor() const;
49  void clear_blocking_factor();
50
51  int64 token_id() const { return token_id_; }
52
53 private:
54  SyncTaskToken(const base::WeakPtr<SyncTaskManager>& manager,
55                int64 token_id,
56                scoped_ptr<BlockingFactor> blocking_factor);
57
58  base::WeakPtr<SyncTaskManager> manager_;
59  tracked_objects::Location location_;
60  int64 token_id_;
61  SyncStatusCallback callback_;
62
63  scoped_ptr<BlockingFactor> blocking_factor_;
64
65  DISALLOW_COPY_AND_ASSIGN(SyncTaskToken);
66};
67
68}  // namespace drive_backend
69}  // namespace sync_file_system
70
71#endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_TASK_TOKEN_H_
72