FD_ADVISE

;;; Provide file advisory information on a file descriptor.
  ;;; Note: This is similar to `posix_fadvise` in POSIX.
  (@interface func (export "fd_advise")
    (param $fd $fd)
    ;;; The offset within the file to which the advisory applies.
    (param $offset $filesize)
    ;;; The length of the region to which the advisory applies.
    (param $len $filesize)
    ;;; The advice.
    (param $advice $advice)
    (result $error (expected (error $errno)))
  )