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#include <algorithm>
29
30#include "talk/base/taskparent.h"
31
32#include "talk/base/task.h"
33#include "talk/base/taskrunner.h"
34
35namespace talk_base {
36
37TaskParent::TaskParent(Task* derived_instance, TaskParent *parent)
38    : parent_(parent) {
39  ASSERT(derived_instance != NULL);
40  ASSERT(parent != NULL);
41  runner_ = parent->GetRunner();
42  parent_->AddChild(derived_instance);
43  Initialize();
44}
45
46TaskParent::TaskParent(TaskRunner *derived_instance)
47    : parent_(NULL),
48      runner_(derived_instance) {
49  ASSERT(derived_instance != NULL);
50  Initialize();
51}
52
53// Does common initialization of member variables
54void TaskParent::Initialize() {
55  children_.reset(new ChildSet());
56  child_error_ = false;
57}
58
59void TaskParent::AddChild(Task *child) {
60  children_->insert(child);
61}
62
63#ifdef _DEBUG
64bool TaskParent::IsChildTask(Task *task) {
65  ASSERT(task != NULL);
66  return task->parent_ == this && children_->find(task) != children_->end();
67}
68#endif
69
70bool TaskParent::AllChildrenDone() {
71  for (ChildSet::iterator it = children_->begin();
72       it != children_->end();
73       ++it) {
74    if (!(*it)->IsDone())
75      return false;
76  }
77  return true;
78}
79
80bool TaskParent::AnyChildError() {
81  return child_error_;
82}
83
84void TaskParent::AbortAllChildren() {
85  if (children_->size() > 0) {
86#ifdef _DEBUG
87    runner_->IncrementAbortCount();
88#endif
89
90    ChildSet copy = *children_;
91    for (ChildSet::iterator it = copy.begin(); it != copy.end(); ++it) {
92      (*it)->Abort(true);  // Note we do not wake
93    }
94
95#ifdef _DEBUG
96    runner_->DecrementAbortCount();
97#endif
98  }
99}
100
101void TaskParent::OnStopped(Task *task) {
102  AbortAllChildren();
103  parent_->OnChildStopped(task);
104}
105
106void TaskParent::OnChildStopped(Task *child) {
107  if (child->HasError())
108    child_error_ = true;
109  children_->erase(child);
110}
111
112} // namespace talk_base
113