/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */

/*  

 *  (C) 2001 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpi.h"

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#define SIZE (65536)

/* This is the same as simple.c, but uses the PMPI versions of all

   MPI functions in order to test the profiling interface. */

/* Each process writes to separate files and reads them back. 

   The file name is taken as a command-line argument, and the process rank 

   is appended to it. */ 

int main(int argc, char **argv)

{

    int *buf, i, rank, nints, len;

    char *filename, *tmp;

    int errs=0, toterrs;

    MPI_File fh;

    MPI_Status status;

    PMPI_Init(&argc,&argv);

    PMPI_Comm_rank(MPI_COMM_WORLD, &rank;;

/* process 0 takes the file name as a command-line argument and 

   broadcasts it to other processes */

    if (!rank) {

	i = 1;

	while ((i < argc) && strcmp("-fname", *argv)) {

	    i++;

	    argv++;

	}

	if (i >= argc) {

	    fprintf(stderr, "\n*#  Usage: simple -fname filename\n\n");

	    PMPI_Abort(MPI_COMM_WORLD, 1);

	}

	argv++;

	len = strlen(*argv);

	filename = (char *) malloc(len+10);

	strcpy(filename, *argv);

	PMPI_Bcast(&len, 1, MPI_INT, 0, MPI_COMM_WORLD);

	PMPI_Bcast(filename, len+10, MPI_CHAR, 0, MPI_COMM_WORLD);

    }

    else {

	PMPI_Bcast(&len, 1, MPI_INT, 0, MPI_COMM_WORLD);

	filename = (char *) malloc(len+10);

	PMPI_Bcast(filename, len+10, MPI_CHAR, 0, MPI_COMM_WORLD);

    }

    buf = (int *) malloc(SIZE);

    nints = SIZE/sizeof(int);

    for (i=0; i

    /* each process opens a separate file called filename.'myrank' */

    tmp = (char *) malloc(len+10);

    strcpy(tmp, filename);

    sprintf(filename, "%s.%d", tmp, rank);

    PMPI_File_open(MPI_COMM_SELF, filename, MPI_MODE_CREATE | MPI_MODE_RDWR,

		   MPI_INFO_NULL, &fh;;

    PMPI_File_write(fh, buf, nints, MPI_INT, &status);

    PMPI_File_close(&fh;;

    /* reopen the file and read the data back */

    for (i=0; i

    PMPI_File_open(MPI_COMM_SELF, filename, MPI_MODE_CREATE | MPI_MODE_RDWR, 

                  MPI_INFO_NULL, &fh;;

    PMPI_File_read(fh, buf, nints, MPI_INT, &status);

    PMPI_File_close(&fh;;

    /* check if the data read is correct */

    for (i=0; i

	if (buf[i] != (rank*100000 + i)) {

	    errs++;

	    fprintf(stderr, "Process %d: error, read %d, should be %d\n", rank, buf[i], rank*100000+i);

	}

    }

    MPI_Allreduce( &errs, &toterrs, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD );

    if (rank == 0) {

	if( toterrs > 0) {

	    fprintf( stderr, "Found %d errors\n", toterrs );

	}

	else {

	    fprintf( stdout, " No Errors\n" );

	}

    }

    free(buf);

    free(filename);

    free(tmp);

    PMPI_Finalize();

    return 0; 

}