Function makeSharedMemory

src/storage/shared_memory.cpp:197–222

#endif

std::unique_ptr<SharedMemory> makeSharedMemory(const ProjID proj_id, const uint64_t size)
{
    OSRMLockFile lock_file(proj_id);
    try
    {
        if (!std::filesystem::exists(lock_file.to_path()))
        {
            if (size == 0)
            {
                throw util::exception("Lock file does not exist, exiting. " + SOURCE_REF);
            }
            else
            {
                std::ofstream ofs(lock_file.to_path());
            }
        }
        return std::make_unique<SharedMemory>(proj_id, size);
    }
    catch (const interprocess_exception &e)
    {
        util::Log(logERROR) << "Error while attempting to allocate shared memory: " << e.what()
                            << ", code: " << e.get_error_code()
                            << ", lock file: " << lock_file.to_path();
        throw util::exception(e.what() + SOURCE_REF);
    }
}

// Try to use a directory for lock files. Creates it if needed.
// Returns true on success, false if the directory cannot be used.