70 строки
2.2 KiB
C
70 строки
2.2 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_addproc.h"
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#include "mpi.h"
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#include "ompi/constants.h"
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#include "ompi/mca/pml/pml.h"
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#include "ompi/mca/sharedfp/sharedfp.h"
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int
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mca_sharedfp_addproc_seek (mca_io_ompio_file_t *fh,
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OMPI_MPI_OFFSET_TYPE offset, int whence)
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{
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int rank;
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int ret = OMPI_SUCCESS;
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OMPI_MPI_OFFSET_TYPE position = 0;
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struct mca_sharedfp_base_data_t *sh = NULL;
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struct mca_sharedfp_addproc_data * addproc_data = sh->selected_module_data;
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long buff = 0;
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if(NULL == fh->f_sharedfp_data){
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opal_output(0, "sharedfp_addproc_write_ordered - shared file pointer structure not initialized correctly\n");
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return OMPI_ERROR;
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}
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sh = fh->f_sharedfp_data;
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rank = ompi_comm_rank ( sh->comm );
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buff = offset;
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/* This is a collective call,
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* only one process needs to communicate with the */
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if(0 == rank){
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ret = MCA_PML_CALL(send ( &buff, 1, OMPI_OFFSET_DATATYPE, 0, whence,
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MCA_PML_BASE_SEND_STANDARD,
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addproc_data->intercom));
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if ( OMPI_SUCCESS != ret ) {
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return OMPI_ERROR;
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}
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ret = MCA_PML_CALL(recv(&position, 1, OMPI_OFFSET_DATATYPE, 0, whence,
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addproc_data->intercom, MPI_STATUS_IGNORE));
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if ( OMPI_SUCCESS != ret ) {
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return OMPI_ERROR;
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}
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}
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ret = sh->comm->c_coll.coll_barrier(sh->comm, sh->comm->c_coll.coll_barrier_module);
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return ret;
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}
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