/*
 * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2005 The University of Tennessee and The University
 *                         of Tennessee Research Foundation.  All rights
 *                         reserved.
 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
 *                         University of Stuttgart.  All rights reserved.
 * Copyright (c) 2004-2005 The Regents of the University of California.
 *                         All rights reserved.
 * Copyright (c) 2013      University of Houston. All rights reserved.
 * $COPYRIGHT$
 *
 * Additional copyrights may follow
 *
 * $HEADER$
 */


#include "ompi_config.h"
#include "sharedfp_addproc.h"

#include "mpi.h"
#include "ompi/constants.h"
#include "ompi/mca/sharedfp/sharedfp.h"

int mca_sharedfp_addproc_iread(mca_io_ompio_file_t *fh,
                                   void *buf,
                                   int count,
                                   ompi_datatype_t *datatype,
                                   MPI_Request * request)
{
    int ret = OMPI_SUCCESS;
    OMPI_MPI_OFFSET_TYPE offset = 0;
    long bytesRequested = 0;
    size_t numofBytes;
    struct mca_sharedfp_base_data_t *sh = NULL;

    if(NULL == fh->f_sharedfp_data){
        opal_output(0, "sharedfp_addproc_iread - shared file pointer structure not initialized correctly\n");
        return OMPI_ERROR;
    }

    /* Calculate the number of bytes to write */
    opal_datatype_type_size ( &datatype->super ,&numofBytes);
    bytesRequested = count * numofBytes;

    if ( mca_sharedfp_addproc_verbose ){
	printf("mca_sharedfp_addproc_iread: Bytes Requested is %ld\n",bytesRequested);
    }
    /* Retrieve the shared file data struct */
    sh = fh->f_sharedfp_data;

    /*Request to the additional process for the offset*/
    ret = mca_sharedfp_addproc_request_position(sh,bytesRequested,&offset);
    if( OMPI_SUCCESS == ret ){
	if ( mca_sharedfp_addproc_verbose ){
	    printf("mca_sharedfp_addproc_iread: Offset received is %lld\n",offset);
	}
        /* Read from the file */
        ret = ompio_io_ompio_file_iread_at ( sh->sharedfh, offset, buf, count, datatype, request);
    }

    return ret;
}
int mca_sharedfp_addproc_read_ordered_begin(mca_io_ompio_file_t *fh,
                                       void *buf,
                                       int count,
                                       struct ompi_datatype_t *datatype)
{
    opal_output(0,"mca_sharedfp_addproc_read_ordered_begin: NOT IMPLEMENTED\n");
    return OMPI_ERROR;

}


int mca_sharedfp_addproc_read_ordered_end(mca_io_ompio_file_t *fh,
                                              void *buf,
                                              ompi_status_public_t *status)
{
    opal_output(0,"mca_sharedfp_addproc_read_ordered_end: NOT IMPLEMENTED\n");
    return OMPI_ERROR;

}