Moved to reference passing system

src/kernel/system.rs

@@ -16,10 +16,7 @@ macro_rules! init_system {
         init_system!(m)
     }};
     ($a:expr) => {{
-        let sys = std::rc::Rc::new(std::cell::RefCell::new(crate::System::new($a)));
-        crate::System::freeze(std::rc::Rc::clone(&sys));
-        sys
-
+        $crate::System::new($a)
     }};
 }
 
@@ -36,7 +33,7 @@ macro_rules! init_system {
 #[derive(PartialEq)]
 pub struct System {
     machine: Machine,
-    thread_manager: Rc<RefCell<ThreadManager>>
+    thread_manager: ThreadManager
 }
 
 impl System {
@@ -45,34 +42,26 @@ impl System {
     pub fn new(machine: Machine) -> System {
         Self {
             machine,
-            thread_manager: Rc::new(RefCell::new(ThreadManager::new()))
+            thread_manager: ThreadManager::new()
         }
     }
 
-    /// use thread_manager setter to send it system instance
-    pub fn freeze(this: Rc<RefCell<System>>) {
-        let copy = Rc::clone(&this);
-        let tm = &this.borrow_mut().thread_manager;
-        tm.borrow_mut().system = Option::Some(copy);
-        ThreadManager::freeze(tm);
-    }
-
     // GETTERS
 
     /// Returns the Machine
     /// 
     /// Useful to access RAM, devices, ...
-    pub fn get_machine(&self) -> Machine {
-        self.machine
+    pub fn get_machine(&self) -> &Machine {
+        &self.machine
     }
 
-    pub fn get_thread_manager(&self) -> Rc<RefCell<ThreadManager>> {
-        Rc::clone(&self.thread_manager)
+    pub fn get_thread_manager(&self) -> &ThreadManager {
+        &self.thread_manager
     }
 
     // Setters
 
-    /// Assign a machine to the system
+    /// Assign a machine to the system 
     pub fn set_machine(&mut self, machine: Machine) {
         self.machine = machine
     }