Enable exiting the session

concert/session/utils.py

@@ -1,5 +1,6 @@
 import logging
 import math
+import os
 import inspect
 import subprocess
 import time
@@ -149,16 +150,18 @@ def abort():
 
 
 @threaded
-def check_emergency_stop(check, poll_interval=0.1*q.s):
+def check_emergency_stop(check, poll_interval=0.1*q.s, exit_session=False):
     """If a callable *check* returns True abort is called. Then until it clears to False nothing is
     done and then the process begins again. *poll_interval* is the interval at which *check* is
-    called.
+    called. If *exit_session* is True the session exits when the emergency stop occurs.
     """
     while True:
         if check():
             futures = abort()
             LOG.error('Emergency stop')
             wait(futures)
+            if exit_session:
+                os.abort()
             while check():
                 # Wait until the flag clears
                 time.sleep(poll_interval.to(q.s).magnitude)