//! Asynchronous utilities.

use core::task::Waker;

use embassy_sync::waitqueue::GenericAtomicWaker;

use esp_sync::RawMutex;

/// Utility struct to register and wake a waker.

pub struct AtomicWaker {

    waker: GenericAtomicWaker<RawMutex>,

}

impl AtomicWaker {

    /// Creates a new `AtomicWaker`.

    #[allow(clippy::new_without_default)]

    pub const fn new() -> Self {

        Self {

            waker: GenericAtomicWaker::new(RawMutex::new()),

        }

    }

    /// Registers a waker. Overwrites the previous waker, if any.

    #[inline]

    pub fn register(&self, w: &Waker) {

        self.waker.register(w);

    }

    /// Wakes the registered waker, if any.

    #[crate::ram]

        self.waker.wake();

}