95 строки
3.0 KiB
C
95 строки
3.0 KiB
C
/*
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* Copyright (c) 2004-2007 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) 2004-2008 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) 2006 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2015 Research Organization for Information Science
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* and Technology (RIST). All rights reserved.
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* Copyright (c) 2017 FUJITSU LIMITED. 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 <stdio.h>
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#include "ompi/mpi/c/bindings.h"
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#include "ompi/runtime/params.h"
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#include "ompi/communicator/communicator.h"
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#include "ompi/mca/pml/pml.h"
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#include "ompi/request/request.h"
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#include "ompi/errhandler/errhandler.h"
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#include "ompi/memchecker.h"
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#if OMPI_BUILD_MPI_PROFILING
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#if OPAL_HAVE_WEAK_SYMBOLS
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#pragma weak MPI_Start = PMPI_Start
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#endif
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#define MPI_Start PMPI_Start
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#endif
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static const char FUNC_NAME[] = "MPI_Start";
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int MPI_Start(MPI_Request *request)
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{
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int ret = OMPI_SUCCESS;
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MEMCHECKER(
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memchecker_request(request);
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);
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if ( MPI_PARAM_CHECK ) {
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int rc = MPI_SUCCESS;
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OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
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if (request == NULL) {
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rc = MPI_ERR_REQUEST;
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}
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OMPI_ERRHANDLER_CHECK(rc, MPI_COMM_WORLD, rc, FUNC_NAME);
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}
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/**
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* Per definition of the handling of persistent request in the
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* MPI standard 3.1 page 78 line 19: we must have the following
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* sequence CREATE (START COMPLETE)* FREE. The upper level is
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* responsible for handling any concurency. The PML must handle
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* this case, as it is the only one knowing if the request can
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* be reused or not (it is PML completed or not?).
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*/
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switch((*request)->req_type) {
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case OMPI_REQUEST_PML:
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case OMPI_REQUEST_COLL:
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OPAL_CR_ENTER_LIBRARY();
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ret = (*request)->req_start(1, request);
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OPAL_CR_EXIT_LIBRARY();
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return ret;
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case OMPI_REQUEST_NOOP:
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/**
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* We deal with a MPI_PROC_NULL request. If the request is
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* already active, fall back to the error case in the default.
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* Otherwise, mark it active so we can correctly handle it in
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* the wait*.
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*/
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if( OMPI_REQUEST_INACTIVE == (*request)->req_state ) {
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(*request)->req_state = OMPI_REQUEST_ACTIVE;
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return MPI_SUCCESS;
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}
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default:
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_REQUEST, FUNC_NAME);
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}
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}
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