Struct IoSliceMut

pub struct IoSliceMut(/* private fields */);

An unsafe, 'static, maybe uninitialized, and mutable slice of bytes to interact with system API.

Like IoSliceMut in std, IoSliceMut guarantees the ABI compatibility on unix and windows, but without the lifetime and accepts MaybeUninit<u8>, makes it easier to use with compio driver at the cost of unsafe to construct. IoSliceMut should only be used with compio driver.

Implementations

impl IoSliceMut

pub unsafe fn new(ptr: *mut MaybeUninit<u8>, len: usize) -> Self

Create a new IoSliceMut from a raw pointer and a length.

Safety

The caller must ensure that:

• the pointer is valid for the lifetime of the IoSliceMut
• the length is correct (the content can be uninitialized, but must be accessible)
• the pointer is not used for anything else while the IoSliceMut is in use

pub unsafe fn from_slice(slice: &mut [u8]) -> Self

Create a new IoSliceMut from an initialized slice.

Safety

The caller must ensure that, during the lifetime of the IoSliceMut, the slice is valid the and is not used for anything else.

pub unsafe fn from_uninit(slice: &mut [MaybeUninit<u8>]) -> Self

Create a new IoSliceMut from a uninitialized slice.

Safety

The caller must ensure that, during the lifetime of the IoSliceMut, the slice is valid the and is not used for anything else.

pub fn as_ptr(&self) -> *mut MaybeUninit<u8>

Get the pointer to the buffer.

pub fn len(&self) -> usize

Get the length of the buffer.

pub fn is_empty(&self) -> bool

Check if the buffer is empty.