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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
/*
* Test code provided by Guruprasad H. Kora
*/
#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>
#include "mpitest.h"
#define NUM_SPAWNS 4
int main(int argc, char *argv[])
{
int np = NUM_SPAWNS;
int my_rank, size;
int errcodes[NUM_SPAWNS];
MPI_Comm allcomm;
MPI_Comm intercomm;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
MPI_Comm_spawn((char *) "./spawntest_child", MPI_ARGV_NULL, np,
MPI_INFO_NULL, 0, MPI_COMM_WORLD, &intercomm, errcodes);
if (intercomm == MPI_COMM_NULL) {
fprintf(stdout, "intercomm is null\n");
}
MPI_Intercomm_merge(intercomm, 0, &allcomm);
MPI_Comm_rank(allcomm, &my_rank);
MPI_Comm_size(allcomm, &size);
/* Without the Free of allcomm, the children *must not exit* until the
* parent calls MPI_Finalize. */
MPI_Barrier(allcomm);
/* According to 10.5.4, case 1b in MPI2.2, the children and parent are
* still connected unless MPI_Comm_disconnect is used with allcomm.
* MPI_Comm_free is not sufficient */
MPI_Comm_free(&allcomm);
MPI_Comm_disconnect(&intercomm);
fprintf(stdout, "%s:%d: MTestSleep starting; children should exit\n", __FILE__, __LINE__);
fflush(stdout);
MTestSleep(30);
fprintf(stdout,
"%s:%d: MTestSleep done; all children should have already exited\n",
__FILE__, __LINE__);
fflush(stdout);
MPI_Finalize();
return 0;
}
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