box_swap

An atomic verison of Option<Box<T>>.

One use case for this is being able to have one thread send many updates to another, but the other thread only cares about looking at the latest value.

use box_swap::BoxSwap;

struct Data {}

let value: BoxSwap<Data> = BoxSwap::empty();
std::thread::scope(|s| {
    s.spawn(|| {
        loop {
            if let Some(new_value) = value.take() {
                // update the value, maybe if this was a renderer you would upload the value to the gpu
                // if multiple values were "sent" before this happens, it doesnt matter, `new_value` is the most up-to-date value
            }

            // do whatever
        }
    });

    loop {
        // do whatever computation, maybe this could be a game loop

        value.store(Box::new(Data {})); // send the data to the other thread
    }
});