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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
* (C) 2013 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
/* This test checks for proper error checking in MPI_Reduce_local, especially
* handling of MPI_IN_PLACE and buffer aliasing. */
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "mpi.h"
#include "mpitest.h"
/* quick cop-out for now */
#define check(c_) assert(c_)
int main(int argc, char *argv[])
{
int err, errs = 0, len, i, errclass;
int rank = -1, size = -1;
int *buf;
int *recvbuf;
char msg[MPI_MAX_ERROR_STRING];
MTest_Init(&argc, &argv);
MPI_Errhandler_set(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
buf = malloc(size * sizeof(int));
recvbuf = malloc(size * sizeof(int));
for (i = 0; i < size; ++i) {
buf[i] = i;
recvbuf[i] = -1;
}
/* check valid reduce_local does not fail */
err = MPI_Reduce_local(buf, recvbuf, size, MPI_INT, MPI_SUM);
check(err == MPI_SUCCESS);
/* ERR: check inbuf==MPI_IN_PLACE */
err = MPI_Reduce_local(MPI_IN_PLACE, recvbuf, size, MPI_INT, MPI_SUM);
check(err != MPI_SUCCESS);
MPI_Error_class(err, &errclass);
check(errclass == MPI_ERR_BUFFER);
/* ERR: check inoutbuf==MPI_IN_PLACE */
err = MPI_Reduce_local(buf, MPI_IN_PLACE, size, MPI_INT, MPI_SUM);
check(err != MPI_SUCCESS);
MPI_Error_class(err, &errclass);
check(errclass == MPI_ERR_BUFFER);
/* ERR: check buffer aliasing is caught */
err = MPI_Reduce_local(recvbuf, recvbuf, size, MPI_INT, MPI_SUM);
check(err != MPI_SUCCESS);
MPI_Error_class(err, &errclass);
check(errclass == MPI_ERR_BUFFER);
free(recvbuf);
free(buf);
MTest_Finalize(errs);
MPI_Finalize();
return 0;
}
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