Struct glommio::io::DmaBuffer

pub struct DmaBuffer { /* fields omitted */ }

A buffer suitable for Direct I/O over io_uring

Direct I/O has strict requirements about alignment. On top of that, io_uring places additional restrictions on memory placement if we are to use advanced features like registered buffers.

The DmaBuffer is a buffer that adheres to those properties making it suitable for io_uring’s Direct I/O.

Implementations

impl DmaBuffer

pub fn as_bytes(&self) -> &[u8]

Returns a representation of the current addressable contents of this DmaBuffer as a byte slice

pub fn as_bytes_mut(&mut self) -> &mut [u8]

Returns a representation of the current addressable contents of this DmaBuffer as a mutable byte slice

pub fn len(&self) -> usize

Returns the current number of bytes present in the addressable contents of this DmaBuffer

pub fn is_empty(&self) -> bool

Indicates whether or not this buffer is empty. An empty buffer can be, for instance, the result of a read past the end of a file.

pub fn as_mut_ptr(&mut self) -> *mut u8

Returns a representation of the current addressable contents of this DmaBuffer as mutable pointer

pub fn as_ptr(&self) -> *const u8

Returns a representation of the current addressable contents of this DmaBuffer as pointer

Trait Implementations

impl AsMut<[u8]> for DmaBuffer

fn as_mut(&mut self) -> &mut [u8]

Performs the conversion.

impl AsRef<[u8]> for DmaBuffer

fn as_ref(&self) -> &[u8]

Performs the conversion.

impl Debug for DmaBuffer

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

Formats the value using the given formatter.