UploadBufferManager.h

#pragma once

#include <d3d12.h>
#include <mutex>
#include <tbb/concurrent_unordered_set.h>

#include <ResourceManager/UploadBuffer.h>

namespace BRE {
// This class is responsible to create/get upload buffers
class UploadBufferManager {
public:
    UploadBufferManager() = delete;
    ~UploadBufferManager() = delete;
    UploadBufferManager(const UploadBufferManager&) = delete;
    const UploadBufferManager& operator=(const UploadBufferManager&) = delete;
    UploadBufferManager(UploadBufferManager&&) = delete;
    UploadBufferManager& operator=(UploadBufferManager&&) = delete;

    static void EraseAll() noexcept;

    // Preconditions:
    // - "elementSize" must be greater than zero.
    // - "elementCount" must be greater than zero.
    static UploadBuffer& CreateUploadBuffer(const std::size_t elementSize,
                                            const std::uint32_t elementCount) noexcept;

private:
    using UploadBuffers = tbb::concurrent_unordered_set<UploadBuffer*>;
    static UploadBuffers mUploadBuffers;

    static std::mutex mMutex;
};

}