Enum Decision

#[non_exhaustive]
pub enum Decision {
    Completed(usize),
    Wait(WaitArg),
    Blocking,
    Aio(AioControl),
}

Result of OpCode::pre_submit.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Completed(usize)

Instant operation, no need to submit

Wait(WaitArg)

Async operation, needs to submit

Blocking

Blocking operation, needs to be spawned in another thread

Aio(AioControl)

Available on aio only.

AIO operation, needs to be spawned to the kernel.

Implementations

impl Decision

pub fn wait_for(fd: RawFd, interest: Interest) -> Self

Decide to wait for the given fd with the given interest.

pub fn wait_readable(fd: RawFd) -> Self

Decide to wait for the given fd to be readable.

pub fn wait_writable(fd: RawFd) -> Self

Decide to wait for the given fd to be writable.

pub fn aio( cb: &mut aiocb, submit: unsafe extern "C" fn(_: *mut aiocb) -> i32, ) -> Self

Available on aio only.

Decide to spawn an AIO operation. submit is a method like aio_read.