openmpi/src/mpi/c/sendrecv.c

/*
 * Copyright (c) 2004-2005 The Trustees of Indiana University.
 *                         All rights reserved.
 * Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
 *                         All rights reserved.
 * $COPYRIGHT$
 * 
 * Additional copyrights may follow
 * 
 * $HEADER$
 */
#include "ompi_config.h"
#include <stdio.h>

#include "mpi.h"
#include "mpi/c/bindings.h"
#include "mca/pml/pml.h"


#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Sendrecv = PMPI_Sendrecv
#endif

#if OMPI_PROFILING_DEFINES
#include "mpi/c/profile/defines.h"
#endif

static const char FUNC_NAME[] = "MPI_Sendrecv";


int MPI_Sendrecv(void *sendbuf, int sendcount, MPI_Datatype sendtype,
                 int dest, int sendtag, void *recvbuf, int recvcount,
                 MPI_Datatype recvtype, int source, int recvtag,
                 MPI_Comm comm,  MPI_Status *status) 
{
    ompi_request_t* req;
    int rc;

    if ( MPI_PARAM_CHECK ) {
        rc = MPI_SUCCESS;
        OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
        if (ompi_comm_invalid(comm)) {
            return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM, FUNC_NAME);
        } else if (sendcount < 0) {
            rc = MPI_ERR_COUNT;
        } else if (sendtype == MPI_DATATYPE_NULL) {
            rc = MPI_ERR_TYPE;
        } else if (dest != MPI_PROC_NULL && ompi_comm_peer_invalid(comm, dest)) {
            rc = MPI_ERR_RANK;
        } else if (sendtag < 0 || sendtag > MPI_TAG_UB_VALUE) {
            rc = MPI_ERR_TAG;
        } else if (recvcount < 0) {
            rc = MPI_ERR_COUNT;
        } else if (recvtype == MPI_DATATYPE_NULL) {
            rc = MPI_ERR_TYPE;
        } else if (source != MPI_PROC_NULL && source != MPI_ANY_SOURCE && ompi_comm_peer_invalid(comm, source)) {
            rc = MPI_ERR_RANK;
        } else if (((recvtag < 0) && (recvtag !=  MPI_ANY_TAG)) || (recvtag > MPI_TAG_UB_VALUE)) {
            rc = MPI_ERR_TAG;
        }
        OMPI_ERRHANDLER_CHECK(rc, comm, rc, FUNC_NAME);
    }

    if (source != MPI_PROC_NULL) { /* post recv */
        rc = mca_pml.pml_irecv(recvbuf, recvcount, recvtype,
                           source, recvtag, comm, &req);
        OMPI_ERRHANDLER_CHECK(rc, comm, rc, FUNC_NAME);
    }

    if (dest != MPI_PROC_NULL) { /* send */
        rc = mca_pml.pml_send(sendbuf, sendcount, sendtype, dest,
                           sendtag, MCA_PML_BASE_SEND_STANDARD, comm);
        OMPI_ERRHANDLER_CHECK(rc, comm, rc, FUNC_NAME);
    }

    if (source != MPI_PROC_NULL) { /* wait for recv */
        rc = ompi_request_wait(&req, status);
    } else {
        if (MPI_STATUS_IGNORE != status) {
            status->MPI_ERROR = MPI_SUCCESS;
            status->MPI_SOURCE = MPI_PROC_NULL;
            status->MPI_TAG = MPI_ANY_TAG;
            status->_count = 0;
        }
        rc = MPI_SUCCESS;
    }
    OMPI_ERRHANDLER_RETURN(rc, comm, rc, FUNC_NAME);
}