Allow ghostzone sizes of 0. This was buggy before.

git-svn-id: http://svn.cactuscode.org/arrangements/CactusPUGH/PUGH/trunk@260 b61c5cb5-eaca-4651-9a7a-d64986f99364

1 files changed, 9 insertions, 9 deletions

diff --git a/src/Comm.c b/src/Comm.c
index 29554ca..d4614b5 100644
--- a/src/Comm.c
+++ b/src/Comm.c
@@ -8,7 +8,7 @@
    @version $Header$
  @@*/
 
-/*#define DEBUG_PUGH*/
+/*#define DEBUG_PUGH 1*/
 
 #include <stdlib.h>
 #include <stdio.h>
@@ -379,10 +379,10 @@ int PUGH_DisableGArrayGroupComm(pGH *pughGH,
                                 int first_var,
                                 pComm *groupcomm)
 {
+#ifdef DEBUG_PUGH
   pGA *GA;                 /* first variable in group */
 
-
-#ifdef DEBUG_PUGH
+  GA = (pGA *) pughGH->variables[first_var][0];
   printf(" PUGH_DisableGArrayGroupComm: request for group "
          "with first var '%s'\n", GA->name);
   fflush(stdout);
@@ -489,7 +489,7 @@ static int PUGH_EnableComm(pGH *pughGH,
           comm->recv_buffer[i] = NULL;
         }
       }
-      else
+      else               /* no neighbor -> no comm buffers */
       {
         comm->buffer_sz[i]   = 0;
         comm->send_buffer[i] = NULL;
@@ -512,21 +512,21 @@ static int PUGH_EnableComm(pGH *pughGH,
     {
       for (idir = 0; idir < 2 * GA->extras->dim; idir++)
       {
-        comm->docomm[idir] = 1;
+        comm->docomm[idir] = comm->buffer_sz[idir] > 0;
       }
     }
     else if (commflag == PUGH_PLUSFACESCOMM)
     {
       for (idir = 0; idir < GA->extras->dim; idir++)
       {
-        comm->docomm[2*idir+1] = 1;
+        comm->docomm[2*idir+1] = comm->buffer_sz[2*idir+1] > 0;
       }
     }
     else if (commflag == PUGH_MINUSFACESCOMM)
     {
       for (idir = 0; idir < GA->extras->dim; idir++)
       {
-        comm->docomm[2*idir] = 1;
+        comm->docomm[2*idir] = comm->buffer_sz[2*idir] > 0;
       }
     }
     else
@@ -535,8 +535,8 @@ static int PUGH_EnableComm(pGH *pughGH,
       {
         if (commflag == PUGH_COMM(idir))
         {
-          comm->docomm[2*idir] = 1;
-          comm->docomm[2*idir+1] = 1;
+          comm->docomm[2*idir] = comm->buffer_sz[2*idir] > 0;
+          comm->docomm[2*idir+1] = comm->buffer_sz[2*idir+1] > 0;
         }
       }
     }