1 files changed, 9 insertions, 0 deletions
diff --git a/Lasers_und_stuff/Cannon.py b/Lasers_und_stuff/Cannon.py
index b997284..f124ce6 100644
--- a/Lasers_und_stuff/Cannon.py
+++ b/Lasers_und_stuff/Cannon.py
@@ -5,10 +5,19 @@ Created on Nov 11, 2012
 '''
 import serial
 import glob
+import threading
 from math import ceil
 
+def mutex(m):
+    def wrapper(self, *args, **kwargs):
+        self.s.acquire()
+        m()
+        self.s.release()
+    return wrapper
+
 class CannonController :
     def __init__(self):
+        self.s = threading.Semaphore()
         print("cannon controller started")
         self.position = [0, 0]
         self.fired = False