handle_impl.h

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#pragma once
 
#include "graphics.h"
#include <memory>
 
namespace gfx
{
 
template<typename Base, typename T>
class handle_impl
{
public:
    using ptr = std::shared_ptr<Base>;
    using uptr = std::unique_ptr<Base>;
    using weak_ptr = std::weak_ptr<Base>;
 
    using handle_type_t = T;
    using base_type = Base;
 
    ~handle_impl()
    {
        dispose();
    }
 
    void dispose()
    {
        if(is_valid())
        {
            gfx::destroy(handle_);
        }
 
        handle_ = invalid_handle();
    }
 
    [[nodiscard]] auto is_valid() const -> bool
    {
        return bgfx::isValid(handle_);
    }
 
    auto native_handle() const -> T
    {
        return handle_;
    }
 
    static auto invalid_handle() -> T
    {
        T invalid = {bgfx::kInvalidHandle};
        return invalid;
    }
 
protected:
    T handle_ = invalid_handle();
};
} // namespace gfx