multiserver 0.1.0

use std::{sync::{mpsc, Arc, Mutex}, thread};
type Job = Box<dyn FnOnce() + Send + 'static>;
pub struct ThreadPool {
    works: Vec<Worker>,
    sender: mpsc::Sender<Job>,
}
impl ThreadPool {
    pub fn new(size: usize) -> ThreadPool {
        assert!(size > 0);
        let (sender, receiver) = mpsc::channel();
        let receiver = Arc::new(Mutex::new(receiver));
        let mut works = Vec::with_capacity(size);

        for id in 0..size {
            // create some threads and store them in the vector
            works.push(Worker::new(id,Arc::clone(&receiver)));
        }
        ThreadPool{works,sender}
    }

    // --snip--
    pub fn execute<F>(&self, f: F)
    where
        F: FnOnce() + Send + 'static,
    {
        let job = Box::new(f);
        self.sender.send(job).unwrap();
    }
}
struct Worker {
    id: usize,
    thread: thread::JoinHandle<()>,
}

impl Worker {
    fn new(id: usize,receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
        let thread = thread::spawn(move||loop {
            let job = receiver.lock().unwrap().recv().unwrap();
            println!("Worker {id} got a job; executing.");
            job();
        });

        Worker { id, thread }
    }
}