DynamicCpuWriteShaderResourceArrayManager.h

#pragma once
 
// Standrad.
#include <mutex>
#include <unordered_map>
#include <string>
#include <memory>
#include <variant>
#include <optional>
 
// Custom.
#include "misc/Error.h"
 
namespace ne {
    class DynamicCpuWriteShaderResourceArray;
    class DynamicCpuWriteShaderResourceArraySlot;
    class ShaderCpuWriteResourceBinding;
    class VulkanRenderer;
    class VulkanPipeline;
 
    class DynamicCpuWriteShaderResourceArrayManager {
        // Only resource manager is supposed to own this manager.
        friend class GpuResourceManager;
 
    public:
        DynamicCpuWriteShaderResourceArrayManager() = delete;
 
        ~DynamicCpuWriteShaderResourceArrayManager();
 
        DynamicCpuWriteShaderResourceArrayManager(const DynamicCpuWriteShaderResourceArrayManager&) = delete;
        DynamicCpuWriteShaderResourceArrayManager&
        operator=(const DynamicCpuWriteShaderResourceArrayManager&) = delete;
 
        std::variant<std::unique_ptr<DynamicCpuWriteShaderResourceArraySlot>, Error>
        reserveSlotsInArray(ShaderCpuWriteResourceBinding* pShaderResource);
 
        DynamicCpuWriteShaderResourceArray* getArrayForShaderResource(const std::string& sShaderResourceName);
 
    private:
        static std::string formatBytesToMegabytes(size_t iSizeInBytes);
 
        DynamicCpuWriteShaderResourceArrayManager(GpuResourceManager* pResourceManager);
 
        void removeEmptyArrays();
 
        GpuResourceManager* const pResourceManager = nullptr;
 
        std::pair<
            std::recursive_mutex,
            std::unordered_map<std::string, std::unique_ptr<DynamicCpuWriteShaderResourceArray>>>
            mtxCpuWriteShaderResourceArrays;
    };
}