use std::sync::{
    Arc,
    atomic::{AtomicU32, Ordering},
};

pub struct RefCounter(Arc<AtomicU32>);

impl RefCounter {
    pub fn new() -> Self {
        Self(Arc::new(0.into()))
    }
    pub fn refs(&self) -> u32 {
        self.0.load(Ordering::Acquire)
    }
    pub fn drop(&mut self) -> bool {
        let refs = self.0.fetch_sub(1, Ordering::Release);
        refs == 0
    }
}

impl Clone for RefCounter {
    fn clone(&self) -> Self {
        self.0.fetch_add(1, Ordering::Release);
        Self(self.0.clone())
    }
}