💿🐜 Antkeeper source code
https://antkeeper.com
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87 lines
1.9 KiB
87 lines
1.9 KiB
/*
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* Copyright (C) 2017-2019 Christopher J. Howard
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*
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* This file is part of Antkeeper Source Code.
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*
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* Antkeeper Source Code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper Source Code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Antkeeper Source Code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ENTITY_ID_POOL_HPP
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#define ENTITY_ID_POOL_HPP
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#include "entity-id.hpp"
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#include <set>
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/**
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* Manages the creation and destruction of entities.
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*/
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class EntityIDPool
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{
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public:
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/**
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* Creates an instance of EntityIDPool.
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*/
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EntityIDPool();
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/**
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* Destroys an instance of EntityIDPool.
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*/
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~EntityIDPool();
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/**
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* Reserves the next available ID.
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*
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* @return Reserved ID.
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*/
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EntityID reserveNextID();
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/**
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* Reserves the specified ID.
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*
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* @param id Specifies an ID to reserve.
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*/
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void reserveID(EntityID id);
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/**
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* Frees the specified ID.
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*
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* @param id Specifies an ID to free.
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*/
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void freeID(EntityID id);
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/**
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* Returns `true` if the specified ID is reserved.
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*/
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bool isReserved(EntityID id) const;
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private:
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void findNextID();
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EntityID nextID;
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std::set<EntityID> reservedIDs;
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std::set<EntityID> availableIDs;
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};
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inline void EntityIDPool::freeID(EntityID id)
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{
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reservedIDs.erase(id);
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availableIDs.insert(id);
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}
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inline bool EntityIDPool::isReserved(EntityID id) const
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{
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return (reservedIDs.find(id) != reservedIDs.end());
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}
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#endif // ENTITY_ID_POOL_HPP
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