Import Geant4 11.2.0 source tree

source/track/include/G4Track.hh

@@ -299,7 +299,7 @@ class G4Track
       // Touchable Handle
 
     G4DynamicParticle* fpDynamicParticle = nullptr;
-    G4TrackStatus fTrackStatus = fAlive;
+    mutable G4TrackStatus fTrackStatus = fAlive;
 
     G4double fStepLength = 0.0;
       // Before the end of the AlongStepDoIt loop, this keeps the initial

source/track/include/G4TrackStatus.hh

@@ -49,6 +49,10 @@ enum G4TrackStatus
     // Kill the current track and also associated secondaries
   fSuspend,
     // Suspend the current track
+  fSuspendAndWait,
+    // Suspend the current track and send it to the Waiting stack so that it
+    // won't be resumed until all other tracks in the Urgent stack and their
+    // descendants have been tracked
   fPostponeToNextEvent
     // Postpone the tracking of the current track to the next event
 };