BasaltMeter/BasaltPresenter/Presenter/dll_loader.hpp

#include <basalt_char.hpp>
#include <string_view>

#if defined(BASALT_OS_WINDOWS)
#include <Windows.h>
#else
#include <dlfcn.h>
#endif

namespace Basalt::Presenter {

    enum class DllKind {
        RenderEngine,
        DataDeliver,
        ObjectLoader,
        AnimationLoader,
    };

    class DllLoader {
    public:
#if defined(BASALT_OS_WINDOWS)
        using Handle = HMODULE;
#else
        using Handle = void*;
#endif

    public:
        DllLoader(DllKind kind, const std::basic_string_view<BSCHAR> filename);
        ~DllLoader();

    public:
        template<typename T>
        T* CreateInstance() {
            if (!m_Handle) return nullptr;

            using Fct = T* (*) ();
            constexpr char EXPOSE_FUNC_NAME[] = "BSCreateInstance";
#if defined(BASALT_OS_WINDOWS)
            auto fct = (Fct) GetProcAddress(m_Handle, EXPOSE_FUNC_NAME);
#else
            auto fct = (Fct) dlsym(m_Handle, EXPOSE_FUNC_NAME);
#endif

            return fct();
        }

    private:
        Handle m_Handle;
    };

} // namespace Basalt::Presenter