Stack copy implementation

lightproc/src/proc_stack.rs

@@ -45,6 +45,10 @@ impl ProcStack {
         self.after_panic = Some(Arc::new(callback));
         self
     }
+
+    pub fn get_pid(&self) -> usize {
+        self.pid.load(Ordering::Acquire)
+    }
 }
 
 impl fmt::Debug for ProcStack {
@@ -54,3 +58,16 @@ impl fmt::Debug for ProcStack {
             .finish()
     }
 }
+
+impl Clone for ProcStack {
+    fn clone(&self) -> Self {
+        ProcStack {
+            pid: AtomicUsize::new(
+                self.pid.load(Ordering::AcqRel)
+            ),
+            before_start: self.before_start.clone(),
+            after_complete: self.after_complete.clone(),
+            after_panic: self.after_panic.clone(),
+        }
+    }
+}

lightproc/tests/stack.rs

@@ -0,0 +1,14 @@
+use lightproc::proc_stack::ProcStack;
+
+#[test]
+fn stack_copy() {
+    let stack = ProcStack::default()
+        .with_pid(12)
+        .with_after_panic(|| {
+            println!("After panic!");
+        });
+
+    let stack2 = stack.clone();
+
+    assert_eq!(stack2.get_pid(), 12);
+}