Do not require MPI

git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/Slab/trunk@59 2e825fa2-fb71-486d-8b7f-a5ff3f0f6cb8

1 files changed, 28 insertions, 1 deletions

diff --git a/src/slab.c b/src/slab.c
index 40d8d84..f02848b 100644
--- a/src/slab.c
+++ b/src/slab.c
@@ -43,6 +43,9 @@
 
 #ifdef CCTK_MPI
 #  include <mpi.h>
+#  define HAVE_MPI 1
+#else
+#  define HAVE_MPI 0
 #endif
 
 #include "slab.h"
@@ -300,6 +303,30 @@ MPI_Allreduce (void * sendbuf, void * recvbuf, int count,
   return 0;
 }
 
+typedef int MPI_Request;        /* dummy */
+typedef int MPI_Status;         /* dummy */
+
+static int
+MPI_Irecv (void *buf, int count, MPI_Datatype datatype,
+           int source, int tag, MPI_Comm comm, MPI_Request *request)
+{
+  abort();
+}
+
+static int
+MPI_Isend (void *buf, int count, MPI_Datatype datatype, int dest,
+           int tag, MPI_Comm comm, MPI_Request *request)
+{
+  abort();
+}
+
+static int
+MPI_Waitall (int count, MPI_Request *array_of_requests,
+             MPI_Status *array_of_statuses)
+{
+  abort();
+}
+
 #endif
 
 
@@ -1356,7 +1383,7 @@ Slab_MultiTransfer (cGH             const                  * restrict const cctk
   
   CCTK_TimerStartI (timer_xfer);
   ifdebug fflush (stdout);
-  if (use_alltoallv) {
+  if (! HAVE_MPI || use_alltoallv) {
     MPI_Alltoallv
       (srcdata, srccount, srcoffset, srcdatatype,
        dstdata, dstcount, dstoffset, dstdatatype, comm);