37 lines
1.5 KiB
C++
37 lines
1.5 KiB
C++
#pragma once
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#include <vector>
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#include <memory>
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#include <functional>
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#include <utils.hpp>
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#include <object/entity.hpp>
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#include <mutex>
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namespace Game::State {
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class GameState {
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public:
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static GameState& getInstance() { static GameState instance; return instance; }
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// Execute work while holding the GameState mutex to keep access thread-safe.
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template<typename Fn>
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void withEntitiesLocked(Fn&& fn) {
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std::scoped_lock lock(mMutex);
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fn(mEntities);
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}
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void sort(); // Sort entities by zIndex for correct rendering order
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void wipe();
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Object::Entity* getEntityByName(const std::string& name); // Get an entity by name, returns nullptr if no entity with the name exists
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std::vector<Object::Entity*> getEntitiesSnapshot(bool sortByZIndex = false); // Get a stable snapshot of entity pointers for iteration outside the lock
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// Update entity at index, by REFERENCE.
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Object::Entity* getAtIndex(size_t at);
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// Add an entity to the gamestate; Returns a temporary pointer to the entity added. Note that the validity of this pointer cannot be guaranteed after the first call.
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Object::Entity* addEntity(std::unique_ptr<Object::Entity> entity);
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bool removeEntity(const std::string& name);
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private:
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mutable std::mutex mMutex; // Shared mutex for thread safety
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std::vector<std::unique_ptr<Object::Entity>> mEntities;
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};
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} |