entity_manager.h

#ifndef ENTITY_MANAGER_H
#define ENTITY_MANAGER_H
 
#include <memory>
#include <mutex>
#include <unordered_map>
#include <vector>
 
typedef unsigned int EntityId;
 
class Entity;
 
class EntityManager {
   private:
    std::unordered_map<EntityId, std::unique_ptr<Entity>> entities;
    std::unordered_map<EntityId, bool> updated;
    std::mutex m;
    EntityManager();
 
   public:
    static EntityManager& get_instance();
 
    void update();
    ~EntityManager();
 
    Entity& create(unsigned int entity_id);
 
    Entity& get_from_id(unsigned int entity_id);
 
    bool has_entity(unsigned int entity_id);
 
    std::vector<EntityId> get_entity_id_list();
 
    void update_initialize();
 
    void remove_non_updated();
 
    void clean();
 
    void empty();
};
 
#endif  // ENTITY_MANAGER_H