Struct tracing_core::stdlib::sync::WaitTimeoutResult

1.5.0 · source ·
pub struct WaitTimeoutResult(bool);
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.

Tuple Fields§

§0: bool

Implementations§

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impl WaitTimeoutResult

1.5.0 · source

pub fn timed_out(&self) -> bool

Returns true if the wait was known to have timed out.

§Examples

This example spawns a thread which will sleep 20 milliseconds before updating a boolean value and then notifying the condvar.

The main thread will wait with a 10 millisecond timeout on the condvar and will leave the loop upon timeout.

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

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

thread::spawn(move || {
    let (lock, 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 (lock, cvar) = &*pair;
loop {
    // Let's put a timeout on the condvar's wait.
    let result = cvar.wait_timeout(lock.lock().unwrap(), Duration::from_millis(10)).unwrap();
    // 10 milliseconds have passed.
    if result.1.timed_out() {
        // timed out now and we can leave.
        break
    }
}

Trait Implementations§

1.5.0 · source§

impl Clone for WaitTimeoutResult

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fn clone(&self) -> WaitTimeoutResult

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
1.5.0 · source§

impl Debug for WaitTimeoutResult

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

Formats the value using the given formatter. Read more
1.5.0 · source§

impl PartialEq for WaitTimeoutResult

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

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

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.5.0 · source§

impl Copy for WaitTimeoutResult

1.5.0 · source§

impl Eq for WaitTimeoutResult

1.5.0 · source§

impl StructuralPartialEq for WaitTimeoutResult

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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fn borrow_mut(&mut self) -> &mut T

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.