1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
4 * (C) 2003 by Argonne National Laboratory.
5 * See COPYRIGHT in top-level directory.
11 * This test checks to see if we can create a simple datatype
12 * made from many contiguous copies of a single struct. The
13 * struct is built with monotone decreasing displacements to
14 * avoid any struct->contig optimizations.
17 int main(int argc, char **argv)
19 int blocklens[8], psize, i, rank;
21 MPI_Datatype oldtypes[8];
22 MPI_Datatype ntype1, ntype2;
24 MPI_Init(&argc, &argv);
25 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
27 for (i = 0; i < 8; i++) {
29 displs[i] = (7 - i) * sizeof(long);
30 oldtypes[i] = MPI_LONG;
32 MPI_Type_struct(8, blocklens, displs, oldtypes, &ntype1);
33 MPI_Type_contiguous(65536, ntype1, &ntype2);
34 MPI_Type_commit(&ntype2);
36 MPI_Pack_size(2, ntype2, MPI_COMM_WORLD, &psize);
38 MPI_Type_free(&ntype2);
39 MPI_Type_free(&ntype1);
41 /* The only failure mode has been SEGV or aborts within the datatype
44 printf(" No Errors\n");