m-aXimilian
566dd112ff
For some reason it seems as if UpdateResource is already defined in some (other) dependency of Pixelarium. Instead of throwing around platform specific macros to fix the Windows build for correct mangling, I decided to simply rename the function. Fixes #3
59 lines
2.1 KiB
C++
59 lines
2.1 KiB
C++
#pragma once
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#include <functional>
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#include <memory>
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#include <optional>
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#include <unordered_map>
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#include "imaging/PixelariumImage.hpp"
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namespace pixelarium::resources
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{
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struct IResource
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{
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virtual ~IResource() = default;
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};
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template <typename R>
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concept ResT = requires(R& r) { static_cast<IResource&>(r); };
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// template <ResT R>
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template <typename R>
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class IResourcePool
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{
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public:
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virtual ~IResourcePool() = default;
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virtual std::optional<const R*> GetResource(size_t id) const = 0;
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virtual size_t SetResource(std::unique_ptr<R> res) = 0;
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virtual bool ModifyResource(size_t id, std::unique_ptr<R> res) = 0;
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virtual bool DeleteResource(size_t id) = 0;
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virtual void EnumerateResources(const std::function<void(size_t, const R&)>& func) = 0;
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};
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// Now with the =GetResource= method, I do not want to transfer ownership to the caller of that method. The ownership
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// should still
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// reside with the =ResourcePool=!
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// In fact, the intention is, that there is no way back once the =ResourcePool= took ownership of an object.
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// Callers can get references, but no ownership. A caller might delete a resource though.
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class ImageResourcePool : public IResourcePool<imaging::PixelariumImage>
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{
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public:
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ImageResourcePool() = default;
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ImageResourcePool(ImageResourcePool&) = delete;
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ImageResourcePool(const ImageResourcePool&) = delete;
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ImageResourcePool(ImageResourcePool&&) = delete;
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ImageResourcePool& operator=(ImageResourcePool&) = delete;
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ImageResourcePool& operator=(ImageResourcePool&&) = delete;
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std::optional<const imaging::PixelariumImage*> GetResource(size_t id) const override;
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size_t SetResource(std::unique_ptr<imaging::PixelariumImage> res) override;
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bool ModifyResource(size_t id, std::unique_ptr<imaging::PixelariumImage> res) override;
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bool DeleteResource(size_t id) override;
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void EnumerateResources(const std::function<void(size_t, const imaging::PixelariumImage&)>& func) override;
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private:
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std::unordered_map<size_t, std::unique_ptr<imaging::PixelariumImage>> resources_;
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};
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} // namespace pixelarium::resources
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