/**
 * @file mix_cc/shm/utility.h
 * @brief 共享内存常用工具
 * @author Cat (null.null.null@qq.com)
 * @version 0.1
 * @date 2021-05-07
 *
 * Copyright: Baosight Co. Ltd.
 * DO NOT COPY/USE WITHOUT PERMISSION
 *
 */
#pragma once

#include <algorithm>
#include <string>
#include <utility>

#include "mix_cc/type/data_size.h"
#include "mix_cc/utility/read_config.h"

#include <boost/container/scoped_allocator.hpp>
#include <boost/filesystem.hpp>
#include <boost/interprocess/allocators/allocator.hpp>
#include <boost/interprocess/file_mapping.hpp>
#include <boost/interprocess/managed_mapped_file.hpp>
#include <boost/interprocess/managed_shared_memory.hpp>
#include <boost/interprocess/offset_ptr.hpp>
namespace mix_cc {
namespace shm {
namespace bip = boost::interprocess;
namespace bc = boost::container;
template <class T, class Segment>
using ScopedShmAlloc = bc::scoped_allocator_adaptor<
    bip::allocator<T, typename Segment::segment_manager>>;

namespace utility {
/**
 * @brief Get the mapped path info
 * @return std::string
 */
maybe<std::string> get_mapped_path_maybe();

/**
 * @brief 得到映射的共享内存文件
 * @param  file_path        文件路径
 * @param  mapped_file_name 文件名
 * @param  size             大小
 * @return bip::managed_mapped_file
 */
bip::managed_mapped_file get_managed_mapped_file(
    const std::string& file_path, const std::string& mapped_file_name,
    const data_size_t& size);

/**
 * @brief 删除映射的共享内存文件
 * @param  file_path        文件路径
 * @param  file_name        文件名
 * @return true
 * @return false
 */
bool remove_mapped_file(const std::string& file_path,
                        const std::string& file_name);

bip::managed_shared_memory get_managed_memory_segment(
    const std::string& segment_name, const data_size_t& size);
};  // namespace utility

}  // namespace shm

}  // namespace mix_cc