//
// Created by Kirill Zhukov on 20.04.2025.
//

#ifndef SHAREDMEMORYMANAGER_H
#define SHAREDMEMORYMANAGER_H

#include <string>
#include <stdexcept>
#include <fcntl.h>      // O_CREAT, O_RDWR
#include <unistd.h>     // ftruncate, close
#include <sys/mman.h>   // mmap, munmap, shm_open, shm_unlink
#include <cstring>
#include <cstdint>

namespace usub::core
{
    class SharedMemoryManager
    {
    public:
        SharedMemoryManager(const std::string& name, size_t size, bool create_new = true);

        ~SharedMemoryManager();

        [[nodiscard]] void* base_ptr() const noexcept;

        [[nodiscard]] size_t size() const noexcept;

        [[nodiscard]] const std::string& name() const noexcept;

        void destroy();

    private:
        void create();

        void open();

    private:
        std::string shm_name;
        size_t shm_size;
        int shm_fd;
        void* shm_ptr;
    };
} // namespace usub::utils

#endif //SHAREDMEMORYMANAGER_H