[occ] Stop iterating in RUNNING after END_OF_DATA event raised

Author: teo

occ/occlib/OccServer.cxx

@@ -383,6 +383,7 @@ bool OccServer::checkMachineDone()
 
 void OccServer::runChecker()
 {
+    bool endOfData = false;
     while (!m_destroying) {
         m_mu.lock();
 
@@ -394,9 +395,10 @@ void OccServer::runChecker()
         }
 
         // execute periodic actions, as defined for t_State::running
-        if (currentState == t_State::running) {
+        if (currentState == t_State::running && !endOfData) {
             int err = m_rco->iterateRunning();
             if (err == 1) { // signal EndOfData event
+                endOfData = true;
                 auto eodEvent = new pb::DeviceEvent;
                 eodEvent->set_type(pb::END_OF_DATA);
                 pushEvent(eodEvent);

occ/occlib/RuntimeControlledObject.h

@@ -166,8 +166,8 @@ class OCC_EXPORT RuntimeControlledObject {
      *
      * @return 0 if the operation completed successfully and the machine can stay in the running state,
      *  1 if all data processing is done and the implementer wishes to notify the machine control
-     *  mechanism of this condition, or any other value which immediately triggers a transition to
-     *  the error state.
+     *  mechanism of this condition (send END_OF_DATA event), or any other value which immediately
+     *  triggers a transition to the error state.
      *
      * This function is called continuously by OccServer::runChecker if the state machine is in the
      * state t_State::running. It is never called outside this state.