2 /* Creator: Bronis R. de Supinski (bronis@llnl.gov) Fri Mar 17 2000 */
3 /* no-error-waitany.c -- do some MPI calls without any errors */
12 main (int argc, char **argv)
16 char processor_name[128];
25 MPI_Init (&argc, &argv);
26 MPI_Comm_size (MPI_COMM_WORLD, &nprocs);
27 MPI_Comm_rank (MPI_COMM_WORLD, &rank);
28 MPI_Get_processor_name (processor_name, &namelen);
29 printf ("(%d) is alive on %s\n", rank, processor_name);
32 MPI_Barrier (MPI_COMM_WORLD);
36 printf ("not enough tasks\n");
42 MPI_Irecv (buf0, buf_size, MPI_INT,
43 MPI_ANY_SOURCE, 1, MPI_COMM_WORLD, &reqs[0]);
44 MPI_Irecv (buf1, buf_size, MPI_INT,
45 MPI_ANY_SOURCE, 2, MPI_COMM_WORLD, &reqs[1]);
46 MPI_Irecv (buf2, buf_size, MPI_INT,
47 MPI_ANY_SOURCE, 3, MPI_COMM_WORLD, &reqs[2]);
49 for (i = 3; i > 0; i--) {
50 MPI_Send (&flipbit, 1, MPI_INT, 1, i, MPI_COMM_WORLD);
52 MPI_Waitany (i, reqs, &done, &status);
54 assert (done == (i - 1));
59 memset (buf0, 1, buf_size*sizeof(int));
61 for (i = 3; i > 0; i--) {
62 MPI_Recv (&flipbit, 1, MPI_INT,
63 MPI_ANY_SOURCE, i, MPI_COMM_WORLD, &status);
65 MPI_Send (buf0, buf_size, MPI_INT, 0, i, MPI_COMM_WORLD);
69 MPI_Barrier (MPI_COMM_WORLD);
72 printf ("(%d) Finished normally\n", rank);