provide stop_listen function for user to stop listen in another thread

[qzd1989]

(it works on macos and windows now)
I'm not sure if it is correct of stopping listen on macos and windows, this is my first time to contribute code, so please check them carefully.
really hope to help users. :)

on windows:
I have tried many ways to stop PostMessageA, but failed. (PostMessageA, PostMessageW, PostQuitMessage) don't work.
so I use PeekMessageA instead PostMessageA to receive msg and use a channel to send stopping msg signal in the loop to break it.

//stop listen example, only works on macos and windows
use std::{
    thread::{self, spawn},
    time::Duration,
};

use rdev::{listen, stop_listen, Event};

fn main() {
    spawn(|| {
        if let Err(error) = listen(callback) {
            println!("Error: {:?}", error)
        }
    });
    thread::sleep(Duration::from_secs(5));
    spawn(|| stop_listen());
    println!("listen loop is stopped");
    thread::sleep(Duration::from_secs(5));
    spawn(|| {
        if let Err(error) = listen(callback) {
            println!("Error: {:?}", error)
        }
    });
    thread::sleep(Duration::from_secs(5));
    spawn(|| stop_listen());
    println!("listen loop is stopped again");
    thread::sleep(Duration::from_secs(3600));
}

fn callback(event: Event) {
    println!("My callback {:?}", event);
}

[Z1xus]

need this 👍