nodo_std 0.18.5

Standard codelets for NODO
Documentation 
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// Copyright 2023 David Weikersdorfer

use core::marker::PhantomData;
use nodo::prelude::*;

/// A codelet which calls a callback each tick and publishes what it returns
pub struct Source<T, F> {
    callback: F,
    marker: PhantomData<T>,
}

impl<T, F> Source<T, F> {
    pub fn new(callback: F) -> Self {
        Self {
            callback,
            marker: PhantomData,
        }
    }
}

impl<T, F> Codelet for Source<T, F>
where
    T: Send + Sync + Clone,
    F: FnMut() -> T + Send,
{
    type Status = DefaultStatus;
    type Config = ();
    type Rx = ();
    type Tx = DoubleBufferTx<T>;
    type Signals = ();

    fn build_bundles(_: &Self::Config) -> (Self::Rx, Self::Tx) {
        ((), DoubleBufferTx::new(1))
    }

    fn step(&mut self, _: Context<Self>, _: &mut Self::Rx, tx: &mut Self::Tx) -> Outcome {
        tx.push((self.callback)())?;
        SUCCESS
    }
}

/// A codelet which calls a callback each tick and publishes what it returns
pub struct SourceWithError<T, F> {
    callback: F,
    marker: PhantomData<T>,
}

impl<T, F> SourceWithError<T, F> {
    pub fn new(callback: F) -> Self {
        Self {
            callback,
            marker: PhantomData,
        }
    }
}

impl<T, F> Codelet for SourceWithError<T, F>
where
    T: Send + Sync + Clone,
    F: FnMut() -> eyre::Result<T> + Send,
{
    type Status = DefaultStatus;
    type Config = ();
    type Rx = ();
    type Tx = DoubleBufferTx<T>;
    type Signals = ();

    fn build_bundles(_: &Self::Config) -> (Self::Rx, Self::Tx) {
        ((), DoubleBufferTx::new(1))
    }

    fn step(&mut self, _: Context<Self>, _: &mut Self::Rx, tx: &mut Self::Tx) -> Outcome {
        tx.push((self.callback)()?)?;
        SUCCESS
    }
}