Method OSRMLockFile

src/storage/shared_memory.cpp:19–24

struct OSRMLockFile
{
    OSRMLockFile(const ProjID proj_id)
    {
        std::filesystem::path filename =
            std::filesystem::path("osrm-" + std::to_string(proj_id) + ".lock");
        lock_file = getLockDir() / filename;
    }
    const std::filesystem::path to_path() { return lock_file; }
    operator const std::filesystem::path::value_type *() const noexcept
    {