karyon_core::async_util

Struct CondWait

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pub struct CondWait {
    condvar: CondVar,
    w: Mutex<bool>,
}
Expand description

CondWait is a wrapper struct for CondVar with a Mutex boolean flag.

§Example

 use std::sync::Arc;

 use karyon_core::async_util::CondWait;
 use karyon_core::async_runtime::spawn;

  async {
     let cond_wait = Arc::new(CondWait::new());
     let task = spawn({
         let cond_wait = cond_wait.clone();
         async move {
             cond_wait.wait().await;
             // ...
         }
     });

     cond_wait.signal().await;
  };

Fields§

§condvar: CondVar

The CondVar

§w: Mutex<bool>

Boolean flag

Implementations§

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impl CondWait

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pub fn new() -> Self

Creates a new CondWait.

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pub async fn wait(&self)

Waits for a signal or broadcast.

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pub async fn signal(&self)

Signal a waiting task.

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pub async fn broadcast(&self)

Signal all waiting tasks.

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pub async fn reset(&self)

Reset the boolean flag value to false.

Trait Implementations§

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impl Default for CondWait

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fn default() -> Self

Returns the “default value” for a type. Read more

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

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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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impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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Calls U::from(self).

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type Output = T

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type Error = Infallible

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Performs the conversion.
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type Error = <U as TryFrom<T>>::Error

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fn vzip(self) -> V

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