string.cpp

This is an example of how to use the STL string with Metall.

// Copyright 2019 Lawrence Livermore National Security, LLC and other Metall
// Project Developers. See the top-level COPYRIGHT file for details.
//
// SPDX-License-Identifier: (Apache-2.0 OR MIT)
 
#include <iostream>
#include <boost/container/string.hpp>
#include <metall/metall.hpp>
#include <string>
 
// String with Metall
using persistent_string =
    boost::container::basic_string<char, std::char_traits<char>,
                                   metall::manager::allocator_type<char>>;
 
int main() {
  {
    metall::manager manager(metall::create_only, "/tmp/datastore");
    auto pstr = manager.construct<persistent_string>("mystring")(
        "Hello, World!", manager.get_allocator<>());
    std::cout << *pstr << std::endl;
  }
 
  {
    metall::manager manager(metall::open_only, "/tmp/datastore");
    auto pstr = manager.find<persistent_string>("mystring").first;
    std::cout << *pstr << std::endl;
  }
 
  return 0;
}