Added started

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/branches/fork@1516 b32b6428-25c9-4566-ad07-03861ab6144f

lib/xaal/lib/core.py

@@ -43,6 +43,7 @@ class Engine(object):
     def __init__(self,address=config.address,port=config.port,hops=config.hops,key=config.key):
         
         self.devices = []                        # list of devices / use (un)register_devices()
+        self.started = False                     # engine started or not
         self.running = False                     # engine is running or not
         self.callbacks = []                      # functions to call every loop
         self.timers = []                         # functions to call periodic
@@ -292,12 +293,14 @@ class Engine(object):
         for dev in self.devices:
             self.send_alive(dev)
             dev.update_alive()
+        self.started = True
 
     def stop(self):
         self.running = False
 
     def run(self):
-        self.start()
+        if not self.started:
+            self.start()
         self.running = True
         while self.running:
             self.loop()
@@ -382,5 +385,3 @@ class Timer(object):
         self.func = func
         self.period = period
         self.deadline = 0
-        
-