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