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 #pragma once
18 
19 #include <mutex>
20 #include <string>
21 #include <vector>
22 
23 #include <android-base/thread_annotations.h>
24 
25 #include "action.h"
26 #include "builtins.h"
27 
28 namespace android {
29 namespace init {
30 
31 class ActionManager {
32   public:
33     static ActionManager& GetInstance();
34 
35     // Exposed for testing
36     ActionManager();
37     size_t CheckAllCommands();
38 
39     void AddAction(std::unique_ptr<Action> action);
40     void QueueEventTrigger(const std::string& trigger);
41     void QueuePropertyChange(const std::string& name, const std::string& value);
42     void QueueAllPropertyActions();
43     void QueueBuiltinAction(BuiltinFunction func, const std::string& name);
44     void ExecuteOneCommand();
45     bool HasMoreCommands() const;
46     void DumpState() const;
47     void ClearQueue();
48 
49   private:
50     ActionManager(ActionManager const&) = delete;
51     void operator=(ActionManager const&) = delete;
52 
53     std::vector<std::unique_ptr<Action>> actions_;
54     std::queue<std::variant<EventTrigger, PropertyChange, BuiltinAction>> event_queue_
55             GUARDED_BY(event_queue_lock_);
56     mutable std::mutex event_queue_lock_;
57     std::queue<const Action*> current_executing_actions_;
58     std::size_t current_command_;
59 };
60 
61 }  // namespace init
62 }  // namespace android
63