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1 // Copyright 2017 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "services/resource_coordinator/coordination_unit/coordination_unit_impl .h" | |
6 | |
7 #include <memory> | |
8 #include <utility> | |
9 | |
10 #include "base/logging.h" | |
11 #include "base/process/process_handle.h" | |
12 #include "base/strings/string_number_conversions.h" | |
13 #include "base/unguessable_token.h" | |
14 #include "mojo/public/cpp/bindings/strong_binding.h" | |
15 #include "services/resource_coordinator/public/cpp/coordination_unit_id.h" | |
16 | |
17 namespace resource_coordinator { | |
18 | |
19 namespace { | |
20 | |
21 using CUIDMap = std::unordered_map<CoordinationUnitID, CoordinationUnitImpl*>; | |
22 | |
23 CUIDMap& g_cu_map() { | |
nasko
2017/04/21 00:17:32
Can't we just use base::LazyInstance<CUIDMap>?
dcheng
2017/04/21 00:23:16
I'm technically not here, but the jury is out on t
oystein (OOO til 10th of July)
2017/04/21 17:57:55
Yeah I was originally using LazyInstance, but ther
| |
24 static CUIDMap* instance = new CUIDMap(); | |
25 return *instance; | |
26 } | |
27 | |
28 } // namespace | |
29 | |
30 CoordinationUnitImpl::CoordinationUnitImpl( | |
31 const CoordinationUnitID& id, | |
32 std::unique_ptr<service_manager::ServiceContextRef> service_ref) { | |
33 if (!id.id) { | |
34 id_ = CoordinationUnitID(id.type, | |
35 base::UnguessableToken().Create().ToString()); | |
36 } else { | |
37 id_ = id; | |
38 } | |
39 | |
40 auto it = g_cu_map().insert(std::make_pair(id_, this)); | |
41 DCHECK(it.second); // Inserted successfully | |
42 | |
43 service_ref_ = std::move(service_ref); | |
44 } | |
45 | |
46 CoordinationUnitImpl::~CoordinationUnitImpl() { | |
47 g_cu_map().erase(id_); | |
48 | |
49 for (CoordinationUnitImpl* child : children_) { | |
50 child->RemoveParent(this); | |
51 } | |
52 | |
53 for (CoordinationUnitImpl* parent : parents_) { | |
54 parent->RemoveChild(this); | |
55 } | |
56 } | |
57 | |
58 bool CoordinationUnitImpl::SelfOrParentHasFlagSet(StateFlags state) { | |
59 const base::Optional<bool>& state_flag = state_flags_[state]; | |
60 if (state_flag && *state_flag) | |
61 return true; | |
62 | |
63 for (CoordinationUnitImpl* parent : parents_) { | |
64 if (parent->SelfOrParentHasFlagSet(state)) | |
65 return true; | |
66 } | |
67 | |
68 return false; | |
69 } | |
70 | |
71 void CoordinationUnitImpl::RecalcPolicy() { | |
72 for (CoordinationUnitImpl* child : children_) { | |
73 child->RecalcPolicy(); | |
74 } | |
75 | |
76 if (!policy_callback_) { | |
77 return; | |
78 } | |
79 | |
80 bool background_priority = !SelfOrParentHasFlagSet(TAB_VISIBLE) && | |
81 !SelfOrParentHasFlagSet(AUDIO_PLAYING); | |
82 | |
83 // Send the priority to the client if it's new or changed. | |
84 if (!current_policy_) | |
85 current_policy_ = mojom::Policy::New(); | |
86 else if ((current_policy_->use_background_priority == background_priority) && | |
87 !SelfOrParentHasFlagSet(StateFlags::TEST_STATE)) { | |
88 return; | |
89 } | |
90 | |
91 mojom::PolicyPtr policy = mojom::Policy::New(); | |
92 policy->use_background_priority = background_priority; | |
93 current_policy_->use_background_priority = background_priority; | |
94 | |
95 policy_callback_->SetPolicy(std::move(policy)); | |
96 } | |
97 | |
98 void CoordinationUnitImpl::SendEvent(mojom::EventPtr event) { | |
99 switch (event->type) { | |
100 case mojom::EventType::ON_WEBCONTENTS_SHOWN: | |
101 state_flags_[TAB_VISIBLE] = true; | |
102 break; | |
103 case mojom::EventType::ON_WEBCONTENTS_HIDDEN: | |
104 state_flags_[TAB_VISIBLE] = false; | |
105 break; | |
106 case mojom::EventType::ON_PROCESS_AUDIO_STARTED: | |
107 state_flags_[AUDIO_PLAYING] = true; | |
108 break; | |
109 case mojom::EventType::ON_PROCESS_AUDIO_STOPPED: | |
110 state_flags_[AUDIO_PLAYING] = false; | |
111 break; | |
112 case mojom::EventType::TEST_EVENT: | |
113 state_flags_[TEST_STATE] = true; | |
114 break; | |
115 default: | |
116 return; | |
117 } | |
118 | |
119 RecalcPolicy(); | |
120 } | |
121 | |
122 void CoordinationUnitImpl::GetID(const GetIDCallback& callback) { | |
123 callback.Run(id_); | |
124 } | |
125 | |
126 void CoordinationUnitImpl::Duplicate(mojom::CoordinationUnitRequest request) { | |
127 bindings_.AddBinding(this, std::move(request)); | |
128 } | |
129 | |
130 void CoordinationUnitImpl::AddChild(const CoordinationUnitID& child_id) { | |
131 if (child_id == id_) | |
132 return; | |
133 | |
134 auto child_iter = g_cu_map().find(child_id); | |
135 if (child_iter != g_cu_map().end()) { | |
136 CoordinationUnitImpl* child = child_iter->second; | |
137 if (HasParent(child) || HasChild(child)) | |
138 return; | |
139 | |
140 DCHECK(child->id_ == child_id); | |
141 DCHECK(child != this); | |
142 | |
143 if (AddChild(child)) { | |
144 child->AddParent(this); | |
145 } | |
146 } | |
147 } | |
148 | |
149 bool CoordinationUnitImpl::AddChild(CoordinationUnitImpl* child) { | |
150 return children_.count(child) ? false : children_.insert(child).second; | |
151 } | |
152 | |
153 void CoordinationUnitImpl::RemoveChild(CoordinationUnitImpl* child) { | |
154 size_t children_removed = children_.erase(child); | |
155 DCHECK_EQ(1u, children_removed); | |
156 } | |
157 | |
158 void CoordinationUnitImpl::AddParent(CoordinationUnitImpl* parent) { | |
159 DCHECK_EQ(0u, parents_.count(parent)); | |
160 parents_.insert(parent); | |
161 | |
162 RecalcPolicy(); | |
163 } | |
164 | |
165 void CoordinationUnitImpl::RemoveParent(CoordinationUnitImpl* parent) { | |
166 size_t parents_removed = parents_.erase(parent); | |
167 DCHECK_EQ(1u, parents_removed); | |
168 | |
169 RecalcPolicy(); | |
170 } | |
171 | |
172 bool CoordinationUnitImpl::HasParent(CoordinationUnitImpl* unit) { | |
173 for (CoordinationUnitImpl* parent : parents_) { | |
174 if (parent == unit || parent->HasParent(unit)) | |
175 return true; | |
176 } | |
177 | |
178 return false; | |
179 } | |
180 | |
181 bool CoordinationUnitImpl::HasChild(CoordinationUnitImpl* unit) { | |
182 for (CoordinationUnitImpl* child : children_) { | |
183 if (child == unit || child->HasChild(unit)) | |
184 return true; | |
185 } | |
186 | |
187 return false; | |
188 } | |
189 | |
190 void CoordinationUnitImpl::SetPolicyCallback( | |
191 mojom::PolicyCallbackPtr callback) { | |
192 callback.set_connection_error_handler(base::Bind( | |
193 &CoordinationUnitImpl::UnregisterPolicyCallback, base::Unretained(this))); | |
194 | |
195 policy_callback_ = std::move(callback); | |
196 | |
197 RecalcPolicy(); | |
198 } | |
199 | |
200 void CoordinationUnitImpl::UnregisterPolicyCallback() { | |
201 policy_callback_.reset(); | |
202 current_policy_.reset(); | |
203 } | |
204 | |
205 } // namespace resource_coordinator | |
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