Now with Atomicity

tests/advanced1.rs

@@ -1,7 +1,6 @@
 extern crate rustijvm;
 
-use std::rc::Rc;
-use std::sync::Mutex;
+use std::sync::{Arc, Mutex};
 use std::io::{Cursor, Seek, SeekFrom, Read};
 
 fn steps(machine: &mut rustijvm::Machine, num: usize) {
@@ -12,7 +11,7 @@ fn steps(machine: &mut rustijvm::Machine, num: usize) {
 
 #[test]
 fn advanced1() {
-    let output: Rc<Mutex<Cursor<Vec<u8>>>> = Rc::new(Mutex::new(Cursor::new(Vec::new())));
+    let output: Arc<Mutex<Cursor<Vec<u8>>>> = Arc::new(Mutex::new(Cursor::new(Vec::new())));
     let input = Box::new("A".as_bytes());
     let mut machine = rustijvm::Machine::new_from_file("files/task5/all_regular.ijvm").unwrap();
     machine.set_input(input);