Struct SlabMut 

pub struct SlabMut { /* private fields */ }

Mutable slab slice used ONLY during IO.

This type:

• Implements IoBufMut so compio can safely DMA into it.
• Is never exposed to user code.
• Is frozen into immutable Bytes after IO completes.

Implementations

impl SlabMut

pub fn freeze(self) -> Bytes

Freeze this slab into immutable Bytes.

Safety invariants enforced here:

• ptr is inside page
• len <= cap
• After this call, no mutable access exists

Trait Implementations

impl IoBuf for SlabMut

fn as_buf_ptr(&self) -> *const u8

Returns a raw pointer to the vector’s buffer.

fn buf_len(&self) -> usize

Number of initialized bytes.

fn buf_capacity(&self) -> usize

Total size of the buffer, including uninitialized memory, if any.

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

Get the initialized part of the buffer.

unsafe fn as_io_slice(&self) -> IoSlice

Create an IoSlice of this buffer.

fn slice(self, range: impl RangeBounds<usize>) -> Slice<Self>

where Self: Sized,

Returns a view of the buffer with the specified range.

fn filled(&self) -> bool

Indicate whether the buffer has been filled (uninit portion is empty)

impl IoBufMut for SlabMut

fn as_buf_mut_ptr(&mut self) -> *mut u8

Returns a raw mutable pointer to the vector’s buffer.

fn as_mut_slice(&mut self) -> &mut [MaybeUninit<u8>]

Get the uninitialized part of the buffer.

unsafe fn as_io_slice_mut(&mut self) -> IoSliceMut

Create an IoSliceMut of the uninitialized part of the buffer.

impl Send for SlabMut

impl SetBufInit for SlabMut

unsafe fn set_buf_init(&mut self, len: usize)

Set the buffer length. If len is less than the current length, nothing should happen.

impl Sync for SlabMut