#pragma once
#include "fs/VFS.h"
#include "fs/devices/Device.h"
#include <luna/HashMap.h>
#include <luna/Vector.h>
#include <sys/types.h>

struct SharedMemory
{
    Vector<u64> frames;
    off_t offset;
    int prot;
    SharedPtr<VFS::Inode> inode {};
    SharedPtr<Device> device {};
    int refs { 0 };

    SharedMemory() = default;
    SharedMemory(SharedMemory&&) = default;

    static Result<u64> create(u8* mem, off_t offset, usize count);

    Result<void> grow_forward(u8* mem, usize count);
    Result<void> grow_backward(u8* mem, usize count);

    Result<void> map(u64 virt, int flags, off_t offset, usize count);

    void free();

    ~SharedMemory() = default;
};

extern HashMap<u64, SharedMemory> g_shared_memory_map;