Enum Arg 

pub enum Arg<'a> {
    Read(&'a Buffer, usize),
    Write(&'a mut Buffer, usize),
    Bytes(&'a [u8]),
    Same(usize, usize),
}

A kernel argument, bound to the slot of its position in the argument list.

Variants

Read(&'a Buffer, usize)

A buffer the kernel only reads, from byte offset on.

Write(&'a mut Buffer, usize)

A buffer the kernel writes (and may read), from byte offset on.

Bytes(&'a [u8])

Small constant data copied into the command stream (at most 4 KiB).

Same(usize, usize)

The buffer of the buffer argument at this index bound again, from byte offset on: an in-place kernel reading and writing one buffer through two slots. Hazards are those of that argument (bind it as Arg::Write).

Implementations

impl<'a> Arg<'a>

pub fn read(buffer: &'a Buffer) -> Self

The whole buffer, read-only.

pub fn write(buffer: &'a mut Buffer) -> Self

The whole buffer, written.

pub fn bytes(bytes: &'a [u8]) -> Self

Inline constant bytes.

Trait Implementations

impl<'a> Debug for Arg<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.