1 /*
2 * Copyright (C) 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "action_manager.h"
18
19 #include <android-base/logging.h>
20
21 namespace android {
22 namespace init {
23
ActionManager()24 ActionManager::ActionManager() : current_command_(0) {}
25
GetInstance()26 ActionManager& ActionManager::GetInstance() {
27 static ActionManager instance;
28 return instance;
29 }
30
AddAction(std::unique_ptr<Action> action)31 void ActionManager::AddAction(std::unique_ptr<Action> action) {
32 actions_.emplace_back(std::move(action));
33 }
34
QueueEventTrigger(const std::string & trigger)35 void ActionManager::QueueEventTrigger(const std::string& trigger) {
36 event_queue_.emplace(trigger);
37 }
38
QueuePropertyChange(const std::string & name,const std::string & value)39 void ActionManager::QueuePropertyChange(const std::string& name, const std::string& value) {
40 event_queue_.emplace(std::make_pair(name, value));
41 }
42
QueueAllPropertyActions()43 void ActionManager::QueueAllPropertyActions() {
44 QueuePropertyChange("", "");
45 }
46
QueueBuiltinAction(BuiltinFunction func,const std::string & name)47 void ActionManager::QueueBuiltinAction(BuiltinFunction func, const std::string& name) {
48 auto action = std::make_unique<Action>(true, nullptr, "<Builtin Action>", 0, name,
49 std::map<std::string, std::string>{});
50 action->AddCommand(func, {name}, 0);
51
52 event_queue_.emplace(action.get());
53 actions_.emplace_back(std::move(action));
54 }
55
ExecuteOneCommand()56 void ActionManager::ExecuteOneCommand() {
57 // Loop through the event queue until we have an action to execute
58 while (current_executing_actions_.empty() && !event_queue_.empty()) {
59 for (const auto& action : actions_) {
60 if (std::visit([&action](const auto& event) { return action->CheckEvent(event); },
61 event_queue_.front())) {
62 current_executing_actions_.emplace(action.get());
63 }
64 }
65 event_queue_.pop();
66 }
67
68 if (current_executing_actions_.empty()) {
69 return;
70 }
71
72 auto action = current_executing_actions_.front();
73
74 if (current_command_ == 0) {
75 std::string trigger_name = action->BuildTriggersString();
76 LOG(INFO) << "processing action (" << trigger_name << ") from (" << action->filename()
77 << ":" << action->line() << ")";
78 }
79
80 action->ExecuteOneCommand(current_command_);
81
82 // If this was the last command in the current action, then remove
83 // the action from the executing list.
84 // If this action was oneshot, then also remove it from actions_.
85 ++current_command_;
86 if (current_command_ == action->NumCommands()) {
87 current_executing_actions_.pop();
88 current_command_ = 0;
89 if (action->oneshot()) {
90 auto eraser = [&action](std::unique_ptr<Action>& a) { return a.get() == action; };
91 actions_.erase(std::remove_if(actions_.begin(), actions_.end(), eraser));
92 }
93 }
94 }
95
HasMoreCommands() const96 bool ActionManager::HasMoreCommands() const {
97 return !current_executing_actions_.empty() || !event_queue_.empty();
98 }
99
DumpState() const100 void ActionManager::DumpState() const {
101 for (const auto& a : actions_) {
102 a->DumpState();
103 }
104 }
105
ClearQueue()106 void ActionManager::ClearQueue() {
107 // We are shutting down so don't claim the oneshot builtin actions back
108 current_executing_actions_ = {};
109 event_queue_ = {};
110 current_command_ = 0;
111 }
112
113 } // namespace init
114 } // namespace android
115