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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
*
* (C) 2003 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>
#include "mpitest.h"
/*
static char MTEST_Descrip[] = "Test set_view with DISPLACEMENT_CURRENT";
*/
int main(int argc, char *argv[])
{
int errs = 0, err;
int size, rank, *buf;
MPI_Offset offset;
MPI_File fh;
MPI_Comm comm;
MPI_Status status;
MTest_Init(&argc, &argv);
/* This test reads a header then sets the view to every "size" int,
* using set view and current displacement. The file is first written
* using a combination of collective and ordered writes */
comm = MPI_COMM_WORLD;
err = MPI_File_open(comm, (char *) "test.ord",
MPI_MODE_WRONLY | MPI_MODE_CREATE, MPI_INFO_NULL, &fh);
if (err) {
errs++;
MTestPrintErrorMsg("Open(1)", err);
}
MPI_Comm_size(comm, &size);
MPI_Comm_rank(comm, &rank);
buf = (int *) malloc(size * sizeof(int));
buf[0] = size;
err = MPI_File_write_all(fh, buf, 1, MPI_INT, &status);
if (err) {
errs++;
MTestPrintErrorMsg("Write_all", err);
}
err = MPI_File_get_position(fh, &offset);
if (err) {
errs++;
MTestPrintErrorMsg("Get_position", err);
}
err = MPI_File_seek_shared(fh, offset, MPI_SEEK_SET);
if (err) {
errs++;
MTestPrintErrorMsg("Seek_shared", err);
}
buf[0] = rank;
err = MPI_File_write_ordered(fh, buf, 1, MPI_INT, &status);
if (err) {
errs++;
MTestPrintErrorMsg("Write_ordered", err);
}
err = MPI_File_close(&fh);
if (err) {
errs++;
MTestPrintErrorMsg("Close(1)", err);
}
/* Reopen the file as sequential */
err = MPI_File_open(comm, (char *) "test.ord",
MPI_MODE_RDONLY | MPI_MODE_SEQUENTIAL |
MPI_MODE_DELETE_ON_CLOSE, MPI_INFO_NULL, &fh);
if (err) {
errs++;
MTestPrintErrorMsg("Open(Read)", err);
}
if (rank == 0) {
err = MPI_File_read_shared(fh, buf, 1, MPI_INT, &status);
if (err) {
errs++;
MTestPrintErrorMsg("Read_all", err);
}
if (buf[0] != size) {
errs++;
fprintf(stderr, "Unexpected value for the header = %d, should be %d\n", buf[0], size);
fflush(stderr);
}
}
MPI_Barrier(comm);
/* All processes must provide the same file view for MODE_SEQUENTIAL */
/* See MPI 2.1, 13.3 - DISPLACEMENT_CURRENT is *required* for
* MODE_SEQUENTIAL files */
err = MPI_File_set_view(fh, MPI_DISPLACEMENT_CURRENT, MPI_INT,
MPI_INT, (char *) "native", MPI_INFO_NULL);
if (err) {
errs++;
MTestPrintErrorMsg("Set_view (DISPLACEMENT_CURRENT)", err);
}
buf[0] = -1;
err = MPI_File_read_ordered(fh, buf, 1, MPI_INT, &status);
if (err) {
errs++;
MTestPrintErrorMsg("Read_all", err);
}
if (buf[0] != rank) {
errs++;
fprintf(stderr, "%d: buf[0] = %d\n", rank, buf[0]);
fflush(stderr);
}
free(buf);
err = MPI_File_close(&fh);
if (err) {
errs++;
MTestPrintErrorMsg("Close(2)", err);
}
MTest_Finalize(errs);
MPI_Finalize();
return 0;
}
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