Home | History | Annotate | Download | only in base 
      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);
     45   virtual ~TaskParent() { }
     46 
     47   TaskParent *GetParent() { return parent_; }
     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();
     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 
     77 } // namespace talk_base
     78 
     79 #endif  // TALK_BASE_TASKPARENT_H__
     80