Struct std::sync::WaitTimeoutResult

[+] Show type declaration

pub struct WaitTimeoutResult(_);

[−] Expand description

A type indicating whether a timed wait on a condition variable returned due to a time out or not.

It is returned by the wait_timeout method.

Methods

impl WaitTimeoutResult

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pub fn timed_out(&self) -> bool

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Returns whether the wait was known to have timed out.

Examples

This example spawns a thread which will update the boolean value and then wait 100 milliseconds before notifying the condvar.

The main thread will wait with a timeout on the condvar and then leave once the boolean has been updated and notified.

use std::sync::{Arc, Mutex, Condvar};
use std::thread;
use std::time::Duration;

let pair = Arc::new((Mutex::new(false), Condvar::new()));
let pair2 = pair.clone();

thread::spawn(move|| {
    let &(ref lock, ref cvar) = &*pair2;

    // Let's wait 20 milliseconds before notifying the condvar.
    thread::sleep(Duration::from_millis(20));

    let mut started = lock.lock().unwrap();
    // We update the boolean value.
    *started = true;
    cvar.notify_one();
});

// Wait for the thread to start up.
let &(ref lock, ref cvar) = &*pair;
let mut started = lock.lock().unwrap();
loop {
    // Let's put a timeout on the condvar's wait.
    let result = cvar.wait_timeout(started, Duration::from_millis(10)).unwrap();
    // 10 milliseconds have passed, or maybe the value changed!
    started = result.0;
    if *started == true {
        // We received the notification and the value has been updated, we can leave.
        break
    }
}

Trait Implementations

impl Debug for WaitTimeoutResult

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fn fmt(&self, __arg_0: &mut Formatter) -> Result

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Formats the value using the given formatter.

impl PartialEq for WaitTimeoutResult

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fn eq(&self, __arg_0: &WaitTimeoutResult) -> bool

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This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &WaitTimeoutResult) -> bool

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This method tests for !=.

impl Eq for WaitTimeoutResult

impl Copy for WaitTimeoutResult

impl Clone for WaitTimeoutResult

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fn clone(&self) -> WaitTimeoutResult

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Returns a copy of the value.

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

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Performs copy-assignment from source.