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 // Retrieves a parent that corresponds to the given "code". The code 51 // should be defined in a unique manner for the given subtree. This 52 // method will crash (when the parent_ is NULL) if there is no corresponding 53 // parent. 54 // 55 // Example use: 56 // XmppClient* client = 57 // static_cast<XmppClient*>(parent->GetParent(XMPP_CLIENT_TASK_CODE)); GetParent(int code)58 virtual TaskParent *GetParent(int code) { return parent_->GetParent(code); } 59 60 bool AllChildrenDone(); 61 bool AnyChildError(); 62 #ifdef _DEBUG 63 bool IsChildTask(Task *task); 64 #endif 65 66 protected: 67 void OnStopped(Task *task); 68 void AbortAllChildren(); parent()69 TaskParent *parent() { 70 return parent_; 71 } 72 73 private: 74 void Initialize(); 75 void OnChildStopped(Task *child); 76 void AddChild(Task *child); 77 78 TaskParent *parent_; 79 TaskRunner *runner_; 80 bool child_error_; 81 typedef std::set<Task *> ChildSet; 82 scoped_ptr<ChildSet> children_; 83 DISALLOW_EVIL_CONSTRUCTORS(TaskParent); 84 }; 85 86 87 } // namespace talk_base 88 89 #endif // TALK_BASE_TASKPARENT_H__ 90