static_resource_list.hpp

// Copyright Take Vos 2021.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "assert.hpp"
#include <span>
#include <cstddef>
#include <atomic>
#include <optional>
 
namespace hi::inline v1 {
struct static_resource_item;
 
inline std::atomic<static_resource_item const *> static_resource_list = nullptr;
 
struct static_resource_item {
    static_resource_item const *next;
    char const *filename;
    std::span<std::byte const> bytes;
 
    [[nodiscard]] static std::span<std::byte const> find(std::string_view filename) noexcept
    {
        for (auto ptr = static_resource_list.load(); ptr != nullptr; ptr = ptr->next) {
            if (filename == ptr->filename) {
                return ptr->bytes;
            }
        }
        return {};
    }
 
    [[nodiscard]] hi_no_inline static static_resource_item const *add(static_resource_item *new_item) noexcept
    {
        hi_axiom(new_item != nullptr);
        return new_item->next = static_resource_list.exchange(new_item);
    }
};
 
} // namespace hi::inline v1