Workerpool

A simple rust workerpool implementation. It uses channels to synchronize the jobs.

• Use ```rust use std::{sync::Arc, sync::Barrier};

use workerpool::pool;

fn main() {

let nworkers = 4;
let njobs = 8;

let pool = pool::WorkerPool::new(nworkers);

let (tx, rx) = mpsc::channel();

for _ in 0..njobs {
    let tx = tx.clone();
    pool.execute(Box::new(move || {
        tx.send(1).expect("channel waiting for pool");
    }));
}

assert_eq!(rx.iter().take(njobs).fold(0, |a, b| a + b), njobs);

} ```