1/*
2 *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef WEBRTC_BASE_TASKPARENT_H__
12#define WEBRTC_BASE_TASKPARENT_H__
13
14#include <set>
15
16#include "webrtc/base/basictypes.h"
17#include "webrtc/base/scoped_ptr.h"
18
19namespace rtc {
20
21class Task;
22class TaskRunner;
23
24class TaskParent {
25 public:
26  TaskParent(Task *derived_instance, TaskParent *parent);
27  explicit TaskParent(TaskRunner *derived_instance);
28  virtual ~TaskParent() { }
29
30  TaskParent *GetParent() { return parent_; }
31  TaskRunner *GetRunner() { return runner_; }
32
33  bool AllChildrenDone();
34  bool AnyChildError();
35#ifdef _DEBUG
36  bool IsChildTask(Task *task);
37#endif
38
39 protected:
40  void OnStopped(Task *task);
41  void AbortAllChildren();
42  TaskParent *parent() {
43    return parent_;
44  }
45
46 private:
47  void Initialize();
48  void OnChildStopped(Task *child);
49  void AddChild(Task *child);
50
51  TaskParent *parent_;
52  TaskRunner *runner_;
53  bool child_error_;
54  typedef std::set<Task *> ChildSet;
55  scoped_ptr<ChildSet> children_;
56  DISALLOW_EVIL_CONSTRUCTORS(TaskParent);
57};
58
59
60} // namespace rtc
61
62#endif  // WEBRTC_BASE_TASKPARENT_H__
63