Struct ReadManagedAt

pub struct ReadManagedAt<S> { /* private fields */ }

Available on (non-io_uring or fusion) and non-io_uring only.

Read a file at specified position into managed buffer.

Implementations

impl<S> ReadManagedAt<S>

pub fn new(fd: S, offset: u64, pool: &BufferPool, len: usize) -> Result<Self>

Create ReadManagedAt.

Trait Implementations

impl<S: AsFd> OpCode for ReadManagedAt<S>

fn pre_submit(self: Pin<&mut Self>) -> Result<Decision>

Perform the operation before submit, and return Decision to indicate whether submitting the operation to polling is required.

fn op_type(self: Pin<&mut Self>) -> Option<OpType>

Get the operation type when an event is occurred.

fn operate(self: Pin<&mut Self>) -> Poll<Result<usize>>

Perform the operation after received corresponding event. If this operation is blocking, the return value should be Poll::Ready.

impl<S> TakeBuffer for ReadManagedAt<S>

type Buffer<'a> = BorrowedBuffer<'a>

Selected buffer type. It keeps the reference to the buffer pool and returns the buffer back on drop.

type BufferPool = BufferPool

Buffer pool type.

fn take_buffer( self, buffer_pool: &BufferPool, result: Result<usize>, _: u32, ) -> Result<BorrowedBuffer<'_>>

Take the selected buffer with buffer_pool, io result and flags, if io operation is success.