if err = fd.pd.waitWrite(fd.isFile); err == nil {
				continue
			}
		}
		if err != nil {
			return 0, err
		}
		return len(p), nil
	}
}

// WriteToInet6 wraps the sendto network call for IPv6 addresses.
func (fd *FD) WriteToInet6(p []byte, sa *syscall.SockaddrInet6) (int, error) {
	if err := fd.writeLock(); err != nil {
		return 0, err
	}
	defer fd.writeUnlock()