Luna/kernel/src/fs/tmpfs/FileSystem.h

#pragma once
#include "fs/VFS.h"
#include <luna/Atomic.h>
#include <luna/Badge.h>
#include <luna/Vector.h>

namespace TmpFS
{
    class FileSystem : public VFS::FileSystem
    {
      public:
        VFS::Inode& root_inode() const override
        {
            return *m_root_inode;
        }

        Result<SharedPtr<VFS::Inode>> create_file_inode() override;

        static Result<SharedPtr<VFS::FileSystem>> create();

        virtual ~FileSystem() = default;

      private:
        FileSystem() = default;

        void set_root(SharedPtr<VFS::Inode> root);

        SharedPtr<VFS::Inode> m_root_inode;
        Vector<SharedPtr<VFS::Inode>> m_inodes;

        Atomic<usize> m_next_inode_number { 2 };
    };

    class Inode : public VFS::FileInode
    {
      public:
        Inode() = default;

        void set_fs(FileSystem& fs, Badge<FileSystem>)
        {
            m_fs = &fs;
        }

        void set_inode_number(usize inum, Badge<FileSystem>)
        {
            m_inode_number = inum;
        }

        VFS::FileSystem& fs() const override
        {
            return *m_fs;
        }

        usize inode_number() const override
        {
            return m_inode_number;
        }

        virtual ~Inode() = default;

      private:
        VFS::FileSystem* m_fs;
        usize m_inode_number;
    };
}