#include <mix_cc/shm/utility.h>

namespace mix_cc {
namespace shm {
namespace utility {
maybe<std::string> get_mapped_path_maybe() {
  return fp::lift_maybe([](json config_info){
   return config_info.at("file_path").get<std::string>();
  },read_config_maybe("utility", "shm"));
}

bip::managed_mapped_file get_managed_mapped_file(
    const std::string& file_path, const std::string& mapped_file_name,
    const data_size_t& size) {
  return bip::managed_mapped_file(
      bip::open_or_create, (file_path + "/" + mapped_file_name).c_str(), size);
}

bool remove_mapped_file(const std::string& file_path,
                        const std::string& file_name) {
  int ret = 1;
  if (!boost::filesystem::remove(file_path + file_name)) {
    ret = 0;
    if (!bip::file_mapping::remove((file_path + file_name).c_str())) {
      ret = -1;
    }
  }
  return ret;
}

bip::managed_shared_memory get_managed_memory_segment(
    const std::string& segment_name, const data_size_t& size) {
  return bip::managed_shared_memory(bip::open_or_create, segment_name.c_str(),
                                    size);
}

}  // namespace utility
}  // namespace shm
}  // namespace mix_cc