1 /*
2  * libjingle
3  * Copyright 2004--2006, Google Inc.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *
8  *  1. Redistributions of source code must retain the above copyright notice,
9  *     this list of conditions and the following disclaimer.
10  *  2. Redistributions in binary form must reproduce the above copyright notice,
11  *     this list of conditions and the following disclaimer in the documentation
12  *     and/or other materials provided with the distribution.
13  *  3. The name of the author may not be used to endorse or promote products
14  *     derived from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  */
27 
28 #ifndef TALK_BASE_TASKPARENT_H__
29 #define TALK_BASE_TASKPARENT_H__
30 
31 #include <set>
32 
33 #include "talk/base/basictypes.h"
34 #include "talk/base/scoped_ptr.h"
35 
36 namespace talk_base {
37 
38 class Task;
39 class TaskRunner;
40 
41 class TaskParent {
42  public:
43   TaskParent(Task *derived_instance, TaskParent *parent);
44   explicit TaskParent(TaskRunner *derived_instance);
~TaskParent()45   virtual ~TaskParent() { }
46 
GetParent()47   TaskParent *GetParent() { return parent_; }
GetRunner()48   TaskRunner *GetRunner() { return runner_; }
49 
50   bool AllChildrenDone();
51   bool AnyChildError();
52 #ifdef _DEBUG
53   bool IsChildTask(Task *task);
54 #endif
55 
56  protected:
57   void OnStopped(Task *task);
58   void AbortAllChildren();
parent()59   TaskParent *parent() {
60     return parent_;
61   }
62 
63  private:
64   void Initialize();
65   void OnChildStopped(Task *child);
66   void AddChild(Task *child);
67 
68   TaskParent *parent_;
69   TaskRunner *runner_;
70   bool child_error_;
71   typedef std::set<Task *> ChildSet;
72   scoped_ptr<ChildSet> children_;
73   DISALLOW_EVIL_CONSTRUCTORS(TaskParent);
74 };
75 
76 } // namespace talk_base
77 
78 #endif  // TALK_BASE_TASKPARENT_H__
79