Thread the sync command, fix align early return lock release

DG_PY_FOFBTool.py

@@ -442,6 +442,12 @@ class DG_PY_FOFBTool(Device):
 
         :return:None
         """
+
+        if not self.lock.acquire(False):
+            self.error_stream("Device is running, skiping command")
+            return
+
+        def target():
             db = tango.Database()
             self.d_status["synchronize"]="Synchronize: starting"
 
@@ -452,6 +458,12 @@ class DG_PY_FOFBTool(Device):
 
             FofbTool.Operation.sync_bpm(bpmidlist, lbpevrx, tlocal, self.tangopath_centraltiming)
             self.d_status["synchronize"]="Synchronize: done"
+            self.set_state(tango.DevState.ON)
+            self.lock.release()
+
+        T = threading.Thread(target=target,)
+        self.set_state(tango.DevState.RUNNING)
+        T.start()
 
         # PROTECTED REGION END #    //  DG_PY_FOFBTool.sync
 
@@ -483,6 +495,8 @@ class DG_PY_FOFBTool(Device):
             if (seqoffset is None) or seqoffset in (-1,0,1):
                 self.error_stream("Could not align all ccn")
                 self.d_status["align"]="FA Align: failed"
+                self.set_state(tango.DevState.ALARM)
+                self.lock.release()
                 return
 
             for cn in self.tangopath_cellnode: