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/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2016 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) 2014-2016 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "mpi.h"
#include "ompi/constants.h"
#include "ompi/datatype/ompi_datatype.h"
#include "ompi/communicator/communicator.h"
#include "ompi/mca/coll/base/coll_tags.h"
#include "ompi/mca/coll/base/coll_base_functions.h"
#include "ompi/mca/pml/pml.h"
#include "coll_base_util.h"
int ompi_coll_base_sendrecv_nonzero_actual( void* sendbuf, size_t scount,
ompi_datatype_t* sdatatype,
int dest, int stag,
void* recvbuf, size_t rcount,
ompi_datatype_t* rdatatype,
int source, int rtag,
struct ompi_communicator_t* comm,
ompi_status_public_t* status )
{ /* post receive first, then send, then waitall... should be fast (I hope) */
int err, line = 0;
size_t rtypesize, stypesize;
ompi_request_t *req;
ompi_status_public_t rstatus;
/* post new irecv */
ompi_datatype_type_size(rdatatype, &rtypesize);
if (0 != rcount && 0 != rtypesize) {
err = MCA_PML_CALL(irecv( recvbuf, rcount, rdatatype, source, rtag,
comm, &req));
if (err != MPI_SUCCESS) { line = __LINE__; goto error_handler; }
}
/* send data to children */
ompi_datatype_type_size(sdatatype, &stypesize);
if (0 != scount && 0 != stypesize) {
err = MCA_PML_CALL(send( sendbuf, scount, sdatatype, dest, stag,
MCA_PML_BASE_SEND_STANDARD, comm));
if (err != MPI_SUCCESS) { line = __LINE__; goto error_handler; }
}
if (0 != rcount && 0 != rtypesize) {
err = ompi_request_wait( &req, &rstatus);
if (err != MPI_SUCCESS) { line = __LINE__; goto error_handler; }
if (MPI_STATUS_IGNORE != status) {
*status = rstatus;
}
} else {
if( MPI_STATUS_IGNORE != status )
*status = ompi_status_empty;
}
return (MPI_SUCCESS);
error_handler:
/* Error discovered during the posting of the irecv or send,
* and no status is available.
*/
OPAL_OUTPUT ((ompi_coll_base_framework.framework_output, "%s:%d: Error %d occurred\n",
__FILE__, line, err));
if (MPI_STATUS_IGNORE != status) {
status->MPI_ERROR = err;
}
return (err);
}
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