Carpet: Forbid accessing past timelevels in certain scheduling bins

Certain scheduling bins do not allow accessing past time levels.  Set
the grid function pointers to past time levels to null in these.

darcs-hash:20070606203504-dae7b-df075bdeb5bea053b84d9e6f162796a5aac50540.gz

1 files changed, 6 insertions, 0 deletions

diff --git a/Carpet/Carpet/src/Evolve.cc b/Carpet/Carpet/src/Evolve.cc
index 2b02de5f9..6cc937c64 100644
--- a/Carpet/Carpet/src/Evolve.cc
+++ b/Carpet/Carpet/src/Evolve.cc
@@ -265,6 +265,10 @@ namespace Carpet {
                 
                 int const num_tl = prolongation_order_time+1;
                 
+                bool const old_do_allow_past_timelevels =
+                  do_allow_past_timelevels;
+                do_allow_past_timelevels = false;
+                
                 // Rewind times
                 for (int m=0; m<maps; ++m) {
                   vtt.at(m)->set_delta
@@ -302,6 +306,8 @@ namespace Carpet {
                 } // for tl
                 cctkGH->cctk_time = old_cctk_time;
                 
+                do_allow_past_timelevels = old_do_allow_past_timelevels;
+                
               } LEAVE_LEVEL_MODE;
             } END_MGLEVEL_LOOP;
           } // if did_recompose