RANDOM_GET

;;; Write high-quality random data into a buffer.
  ;;; This function blocks when the implementation is unable to immediately
  ;;; provide sufficient high-quality random data.
  ;;; This function may execute slowly, so when large mounts of random data are
  ;;; required, it's advisable to use this function to seed a pseudo-random
  ;;; number generator, rather than to provide the random data directly.
  (@interface func (export "random_get")
    ;;; The buffer to fill with random data.
    (param $buf (@witx pointer u8))
    (param $buf_len $size)
    (result $error (expected (error $errno)))
  )