if (fd != -1)
    {
#if defined(_WIN32)
	_locking (fd, _LK_UNLCK, 1);
#else
	struct flock fl;

	fl.l_type = F_UNLCK;
	fl.l_whence = SEEK_SET;
	fl.l_start = 0;
	fl.l_len = 0;
	fl.l_pid = getpid ();
	fcntl (fd, F_SETLK, &fl);
#endif
	close (fd);
    }