99 строки
3.2 KiB
C
99 строки
3.2 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2013 University of Houston. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include "sharedfp_sm.h"
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#include "mpi.h"
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#include "ompi/constants.h"
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#include "ompi/mca/sharedfp/sharedfp.h"
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int mca_sharedfp_sm_iread(mca_io_ompio_file_t *fh,
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void *buf,
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int count,
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ompi_datatype_t *datatype,
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MPI_Request * request)
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{
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int ret = OMPI_SUCCESS;
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OMPI_MPI_OFFSET_TYPE offset = 0;
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long bytesRequested = 0;
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size_t numofBytes;
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struct mca_sharedfp_base_data_t *sh = NULL;
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mca_sharedfp_base_module_t * shared_fp_base_module = NULL;
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if( NULL == fh->f_sharedfp_data){
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if ( mca_sharedfp_sm_verbose ) {
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printf("sharedfp_sm_iread: opening the shared file pointer\n");
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}
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shared_fp_base_module = fh->f_sharedfp;
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ret = shared_fp_base_module->sharedfp_file_open(fh->f_comm,
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fh->f_filename,
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fh->f_amode,
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fh->f_info,
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fh);
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if ( OMPI_SUCCESS != ret ) {
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opal_output(0,"sharedfp_sm_iread - error opening the shared file pointer\n");
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return ret;
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}
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}
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/* Calculate the number of bytes to write */
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opal_datatype_type_size ( &datatype->super, &numofBytes);
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bytesRequested = count * numofBytes;
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/* Retrieve the shared file data struct */
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sh = fh->f_sharedfp_data;
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if ( mca_sharedfp_sm_verbose ) {
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printf("sharedfp_sm_iread: Bytes Requested is %ld\n",bytesRequested);
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}
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/*Request the offset to write bytesRequested bytes*/
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ret = mca_sharedfp_sm_request_position(sh,bytesRequested,&offset);
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if ( -1 != ret ) {
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if ( mca_sharedfp_sm_verbose ) {
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printf("sharedfp_sm_iread: Offset received is %lld\n",offset);
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}
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/* Read the file */
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ret = ompio_io_ompio_file_iread_at(sh->sharedfh,offset,buf,count,datatype,request);
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}
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return ret;
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}
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int mca_sharedfp_sm_read_ordered_begin(mca_io_ompio_file_t *fh,
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void *buf,
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int count,
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struct ompi_datatype_t *datatype)
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{
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opal_output(0,"mca_sharedfp_sm_read_ordered_begin: NOT IMPLEMENTED\n");
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return OMPI_ERROR;
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}
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int mca_sharedfp_sm_read_ordered_end(mca_io_ompio_file_t *fh,
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void *buf,
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ompi_status_public_t *status)
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{
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opal_output(0,"mca_sharedfp_sm_read_ordered_end: NOT IMPLEMENTED\n");
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return OMPI_ERROR;
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}
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