71 lines
2.0 KiB
C++
71 lines
2.0 KiB
C++
/**
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* @file mix_cc/shm/stl_builder.h
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* @brief 共享内存stl容器构造器
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* @author Cat (null.null.null@qq.com)
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* @version 0.1
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* @date 2021-05-07
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*
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* Copyright: Baosight Co. Ltd.
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* DO NOT COPY/USE WITHOUT PERMISSION
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*
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*/
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#pragma once
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#include <mix_cc/shm/utility.h>
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#include <string>
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namespace mix_cc {
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namespace shm {
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/**
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* @brief 共享内存stl容器构造器基类
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* @tparam ContainerType
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* @tparam T
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* @tparam Segment
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*/
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template <class ContainerType, class T,
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class Segment = bip::managed_mapped_file>
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class StlBuilder {
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public:
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typedef ScopedShmAlloc<T, Segment> Allocator;
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typedef ContainerType Type;
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public:
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/**
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* @brief 创建共享stl容器
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* @param shm 共享内存块
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* @param container_name 容器名
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* @return bip::offset_ptr<ContainerType>&
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*/
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static bip::offset_ptr<ContainerType>& construct(
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Segment* const shm, const std::string& container_name) {
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return shm->template construct<ContainerType>(container_name.c_str())(
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Allocator(shm->get_segment_manager()));
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}
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/**
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* @brief 在指定内存块上查找共享内存容器
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* @param shm 共享内存块
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* @param container_name 容器名
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* @return bip::offset_ptr<ContainerType>&
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*/
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static bip::offset_ptr<ContainerType>& find(
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Segment* const shm, const std::string& container_name) {
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return shm->template find<ContainerType>(container_name.c_str())(
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Allocator(shm->get_segment_manager()));
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}
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/**
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* @brief 在指定内存块上查找共享内存容器，如果找不到，就创建新的容器
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* @param shm 共享内存块
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* @param container_name 容器名
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* @return bip::offset_ptr<ContainerType>&
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*/
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static bip::offset_ptr<ContainerType> find_or_construct(
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Segment* const shm, const std::string& container_name) {
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return shm->template find_or_construct<ContainerType>(
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container_name.c_str())(Allocator(shm->get_segment_manager()));
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}
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};
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} // namespace shm
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} // namespace mix_cc
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