137 lines
4.3 KiB
C++
137 lines
4.3 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _INIT_ACTION_H
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#define _INIT_ACTION_H
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#include <map>
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#include <queue>
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#include <string>
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#include <variant>
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#include <vector>
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#include "builtins.h"
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#include "keyword_map.h"
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#include "parser.h"
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#include "result.h"
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namespace android {
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namespace init {
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class Command {
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public:
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Command(BuiltinFunction f, const std::vector<std::string>& args, int line);
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Result<Success> InvokeFunc() const;
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std::string BuildCommandString() const;
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int line() const { return line_; }
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private:
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BuiltinFunction func_;
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std::vector<std::string> args_;
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int line_;
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};
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using EventTrigger = std::string;
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using PropertyChange = std::pair<std::string, std::string>;
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using BuiltinAction = class Action*;
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class Action {
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public:
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explicit Action(bool oneshot, const std::string& filename, int line);
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Result<Success> AddCommand(const std::vector<std::string>& args, int line);
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void AddCommand(BuiltinFunction f, const std::vector<std::string>& args, int line);
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Result<Success> InitTriggers(const std::vector<std::string>& args);
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Result<Success> InitSingleTrigger(const std::string& trigger);
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std::size_t NumCommands() const;
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void ExecuteOneCommand(std::size_t command) const;
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void ExecuteAllCommands() const;
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bool CheckEvent(const EventTrigger& event_trigger) const;
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bool CheckEvent(const PropertyChange& property_change) const;
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bool CheckEvent(const BuiltinAction& builtin_action) const;
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std::string BuildTriggersString() const;
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void DumpState() const;
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bool oneshot() const { return oneshot_; }
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const std::string& filename() const { return filename_; }
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int line() const { return line_; }
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static void set_function_map(const KeywordMap<BuiltinFunction>* function_map) {
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function_map_ = function_map;
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}
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private:
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void ExecuteCommand(const Command& command) const;
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bool CheckPropertyTriggers(const std::string& name = "",
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const std::string& value = "") const;
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Result<Success> ParsePropertyTrigger(const std::string& trigger);
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std::map<std::string, std::string> property_triggers_;
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std::string event_trigger_;
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std::vector<Command> commands_;
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bool oneshot_;
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std::string filename_;
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int line_;
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static const KeywordMap<BuiltinFunction>* function_map_;
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};
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class ActionManager {
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public:
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static ActionManager& GetInstance();
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// Exposed for testing
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ActionManager();
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void AddAction(std::unique_ptr<Action> action);
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void QueueEventTrigger(const std::string& trigger);
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void QueuePropertyChange(const std::string& name, const std::string& value);
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void QueueAllPropertyActions();
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void QueueBuiltinAction(BuiltinFunction func, const std::string& name);
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void ExecuteOneCommand();
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bool HasMoreCommands() const;
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void DumpState() const;
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void ClearQueue();
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private:
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ActionManager(ActionManager const&) = delete;
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void operator=(ActionManager const&) = delete;
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std::vector<std::unique_ptr<Action>> actions_;
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std::queue<std::variant<EventTrigger, PropertyChange, BuiltinAction>> event_queue_;
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std::queue<const Action*> current_executing_actions_;
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std::size_t current_command_;
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};
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class ActionParser : public SectionParser {
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public:
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ActionParser(ActionManager* action_manager)
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: action_manager_(action_manager), action_(nullptr) {}
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Result<Success> ParseSection(std::vector<std::string>&& args, const std::string& filename,
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int line) override;
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Result<Success> ParseLineSection(std::vector<std::string>&& args, int line) override;
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void EndSection() override;
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private:
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ActionManager* action_manager_;
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std::unique_ptr<Action> action_;
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};
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} // namespace init
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} // namespace android
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#endif
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