Now with Atomicity

src/machine.rs

@@ -1,6 +1,5 @@
 use std::io::{Read, Write};
-use std::sync::Mutex;
-use std::rc::Rc;
+use std::sync::{Mutex, Arc};
 
 use Result;
 use block::Block;
@@ -32,7 +31,7 @@ pub struct Machine {
     pub heap: Heap,
 
     pub stream_in: Box<Read + Send + Sync>,
-    pub stream_out: Rc<Mutex<Write + Send + Sync>>,
+    pub stream_out: Arc<Mutex<Write + Send + Sync>>,
 
 }
 
@@ -45,7 +44,7 @@ impl Machine {
             block,
             frame: vec![Frame::new(ANTI_BS_SIZE)],
             stream_in: Box::new(::std::io::stdin()),
-            stream_out: Rc::new(Mutex::new(::std::io::stdout())),
+            stream_out: Arc::new(Mutex::new(::std::io::stdout())),
 
             #[cfg(feature = "bonus:network")]
             net: NetStack::new(),
@@ -152,7 +151,7 @@ impl Machine {
         self.stream_in = instream;
     }
 
-    pub fn set_output(&mut self, outstream: Rc<Mutex<Write + Send + Sync>>) {
+    pub fn set_output(&mut self, outstream: Arc<Mutex<Write + Send + Sync>>) {
         self.stream_out = outstream;
     }
 }