Struct Completion 

#[repr(C)]
pub struct Completion {
    pub user_data: u64,
    pub res: i32,
    pub flags: u32,
}

One reaped completion (struct io_uring_cqe): the user_data you tagged the submission with, and res (bytes transferred / accepted fd when ≥ 0, else -errno).

Fields

user_data: u64

The user_data tag the submission carried.

res: i32

Result of the op: bytes transferred or accepted fd (≥ 0) or -errno.

flags: u32

io_uring flags (provided-buffer id + multishot armed bit).

Implementations

impl Completion

pub fn buffer_id(&self) -> Option<u16>

The provided-buffer id the kernel filled, if this completion consumed one (multishot/recv with buffer select). Recycle it via ProvidedBufRing::recycle once the bytes are copied out.

pub fn has_more(&self) -> bool

Whether the originating multishot SQE remains armed (more completions to come). When false, the op terminated and must be re-submitted.

Trait Implementations

impl Clone for Completion

fn clone(&self) -> Completion

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Completion

impl Debug for Completion

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

Formats the value using the given formatter.