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