safina-threadpool 0.2.5

Safe thread pool - ARCHIVED: Code moved to `safina` crate.
Documentation 
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use std::sync::atomic::{AtomicUsize, Ordering};

pub struct AtomicCounter {
    next_value: AtomicUsize,
}
impl AtomicCounter {
    pub fn new() -> Self {
        Self {
            next_value: AtomicUsize::new(0),
        }
    }
    pub fn next(&self) -> usize {
        self.next_value.fetch_add(1, Ordering::AcqRel)
    }
}

#[test]
fn atomic_counter() {
    let counter = std::sync::Arc::new(AtomicCounter::new());
    assert_eq!(0, counter.next());
    assert_eq!(1, counter.next());
    assert_eq!(2, counter.next());
}

#[test]
fn atomic_counter_many_readers() {
    let receiver = {
        let counter = std::sync::Arc::new(AtomicCounter::new());
        let (sender, receiver) = std::sync::mpsc::channel();
        for _ in 0..10 {
            let counter_clone = counter.clone();
            let sender_clone = sender.clone();
            std::thread::spawn(move || {
                for _ in 0..10 {
                    sender_clone.send(counter_clone.next()).unwrap();
                }
            });
        }
        receiver
    };
    let mut values: Vec<usize> = receiver.iter().collect();
    values.sort_unstable();
    assert_eq!((0_usize..100).collect::<Vec<usize>>(), values);
}