--- /dev/null
+/* -*- Mode: C; -*- */
+/* Creator: Bronis R. de Supinski (bronis@llnl.gov) Fri Mar 17 2000 */
+/* waitany-deadlock.c -- deadlock involving MPI_Waitany call */
+
+#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;
+ char processor_name[128];
+ int namelen = 128;
+ int buf0[buf_size];
+ int buf1[buf_size];
+ int buf2[buf_size];
+ int i, flipbit, done;
+ MPI_Status status;
+
+ /* 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);
+
+ if (nprocs < 2)
+ {
+ printf ("not enough tasks\n");
+ }
+ else if (rank == 0)
+ {
+ MPI_Request reqs[3];
+
+ MPI_Irecv (buf0, buf_size, MPI_INT, 1, 0, MPI_COMM_WORLD, &reqs[0]);
+ MPI_Irecv (buf1, buf_size, MPI_INT, 1, 0, MPI_COMM_WORLD, &reqs[1]);
+ MPI_Irecv (buf2, buf_size, MPI_INT, 1, 0, MPI_COMM_WORLD, &reqs[2]);
+
+ for (i = 3; i > 0; i--) {
+ MPI_Waitany (i, reqs, &done, &status);
+
+ assert (done == (i - 1));
+
+ /* don't let next one start until after waitany call... */
+ MPI_Send (&flipbit, 1, MPI_INT, 1, i, MPI_COMM_WORLD);
+ }
+ }
+ else if (rank == 1)
+ {
+ memset (buf0, 1, buf_size);
+
+ for (i = 3; i > 0; i--) {
+ MPI_Recv (&flipbit, 1, MPI_INT, 0, i, MPI_COMM_WORLD, &status);
+
+ MPI_Send (buf0, buf_size, MPI_INT, 0, 0, MPI_COMM_WORLD);
+ }
+ }
+
+ MPI_Barrier (MPI_COMM_WORLD);
+
+ MPI_Finalize ();
+ printf ("(%d) Finished normally\n", rank);
+}
+
+/* EOF */