fptrIsNull :: ForeignPtr a -> Bool
fptrIsNull fp
  = ((U.unsafeForeignPtrToPtr fp) == ptrNull)
fptrIsNull :: ForeignPtr a -> Bool
fptrIsNull fp
  = ((U.unsafeForeignPtrToPtr fp) == ptrNull)
fptrIsNull fp
  = ((U.unsafeForeignPtrToPtr fp) == ptrNull)