--- /dev/null
+/* -*- Mode: C; -*- */
+/* Creator: Bronis R. de Supinski (bronis@llnl.gov) Fri Mar 17 2000 */
+/* no-error.c -- do some MPI calls without any errors */
+
+#include <stdio.h>
+#include <assert.h>
+#include "mpi.h"
+
+#define buf_size 128
+
+int
+main (int argc, char **argv)
+{
+ int nprocs = -1;
+ int rank = -1;
+ int done;
+ char processor_name[128];
+ int namelen = 128;
+ int buf0[buf_size];
+ int buf1[buf_size];
+ MPI_Status status;
+ MPI_Request reqs[2];
+
+ /* init */
+ MPI_Init (&argc, &argv);
+ MPI_Comm_size (MPI_COMM_WORLD, &nprocs);
+ MPI_Comm_rank (MPI_COMM_WORLD, &rank);
+ MPI_Get_processor_name (processor_name, &namelen);
+ printf ("(%d) is alive on %s\n", rank, processor_name);
+ fflush (stdout);
+
+ MPI_Barrier (MPI_COMM_WORLD);
+
+ /* this code is very similar to any_src-waitall-deadlock.c */
+ /* but eliminates the deadlock by using MPI_Waitany... */
+ /* also very similar to no-error-waitall-any_src.c but */
+ /* this code is deterministic; buf0 holds result of */
+ /* memset to 0 and buf1 holds the result of memset to */
+ /* in all three tasks since must match the first Irecv first... */
+ if (nprocs < 3)
+ {
+ printf ("not enough tasks\n");
+ }
+ else if (rank == 0)
+ {
+ MPI_Irecv (buf0, buf_size, MPI_INT,
+ MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, &reqs[0]);
+
+ MPI_Irecv (buf1, buf_size, MPI_INT,
+ MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, &reqs[1]);
+
+ MPI_Waitany (2, reqs, &done, &status);
+
+ assert (done == 0);
+
+ MPI_Send (buf1, buf_size, MPI_INT, 1, 1, MPI_COMM_WORLD);
+
+ MPI_Send (buf0, buf_size, MPI_INT, 2, 2, MPI_COMM_WORLD);
+
+ MPI_Wait (&reqs[1], &status);
+ }
+ else if (rank == 1)
+ {
+ memset (buf0, 0, buf_size);
+
+ MPI_Send (buf0, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD);
+
+ MPI_Recv (buf1, buf_size, MPI_INT, 0, 1, MPI_COMM_WORLD, &status);
+ }
+ else if (rank == 2)
+ {
+ MPI_Recv (buf0, buf_size, MPI_INT, 0, 2, MPI_COMM_WORLD, &status);
+
+ memset (buf1, 1, buf_size);
+
+ MPI_Send (buf1, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD);
+ }
+
+ MPI_Barrier (MPI_COMM_WORLD);
+
+ MPI_Finalize ();
+ printf ("(%d) Finished normally\n", rank);
+}
+
+/* EOF */