Struct PollWaitHandle 

pub struct PollWaitHandle { /* private fields */ }

Cloneable, Send handle onto the kernel’s poll notifier so a caller can wait for “some poll-visible state changed” OFF the thread that owns the kernel (deferred readiness servicing), then re-check readiness with a zero-timeout poll on the owning thread. Take snapshot() BEFORE the readiness check it guards so a change landing between the check and the wait wakes immediately instead of being lost.

Implementations

impl PollWaitHandle

pub fn snapshot(&self) -> u64

Snapshot the current change generation.

pub fn wait_for_change(&self, observed: u64, timeout: Option<Duration>) -> bool

Block until the generation moves past observed or timeout elapses (None = wait forever). Returns true when a change was observed.

Trait Implementations

impl Clone for PollWaitHandle

fn clone(&self) -> PollWaitHandle

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PollWaitHandle

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

Formats the value using the given formatter.