Function close_fd

src/python/runner.cpp:866–874

    static std::atomic<int> g_repl_write_fd{-1};

    static void close_fd(int fd) {
        if (fd < 0)
            return;
#ifdef _WIN32
        _close(fd);
#else
        ::close(fd);
#endif
    }

    void start_embedded_repl(int read_fd, int write_fd) {
        stop_embedded_repl();