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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <mpi.h>
#include "mpitest.h"
/*
static char MTEST_Descrip[] = "Test count for zero length reads";
*/
int main(int argc, char **argv)
{
int errs = 0;
int len, rank, get_size;
char buf[10];
const char *filename = argv[0];
MPI_File fh;
MPI_Status status;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_File_open(MPI_COMM_WORLD, filename, MPI_MODE_RDONLY, MPI_INFO_NULL, &fh);
if (rank == 0)
len = 10;
else
len = 0;
/* mimic the case status object may not be initialized to 0 */
memset(&status, 1, sizeof(status));
MPI_File_read_all(fh, buf, len, MPI_BYTE, &status);
MPI_Get_count(&status, MPI_BYTE, &get_size);
if (len != get_size) {
printf("Error: expecting get_size to be %d but got %d\n", len, get_size);
errs++;
}
MPI_File_close(&fh);
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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