getextent.c

来自「fortran并行计算包」· C语言 代码 · 共 40 行

/* -*- Mode: C; c-basic-offset:4 ; -*- */
/*
 *
 *  (C) 2003 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */
#include "mpi.h"
#include <stdio.h>
#include "mpitest.h"

static char MTEST_Descrip[] = "Test file_get_extent";

int main( int argc, char *argv[] )
{
    int errs = 0;
    MPI_File fh;
    MPI_Comm comm;
    MPI_Aint extent, nextent;

    MTest_Init( &argc, &argv );

    comm = MPI_COMM_WORLD;
    MPI_File_open( comm, "test.ord", 
		   MPI_MODE_RDWR | MPI_MODE_CREATE |
		   MPI_MODE_DELETE_ON_CLOSE, MPI_INFO_NULL, &fh );

    MPI_File_get_type_extent( fh, MPI_INT, &extent );
    MPI_Type_extent( MPI_INT, &nextent );

    if (nextent != extent) {
        errs++;
	fprintf( stderr, "Native extent not the same as the file extent\n" );
    }
    MPI_File_close( &fh );

    MTest_Finalize( errs );
    MPI_Finalize();
    return 0;
}