/*
 * Copyright (c) 2011      Sandia National Laboratories. All rights reserved.
 * Copyright (c) 2012      Cisco Systems, Inc.  All rights reserved.
 * Copyright (c) 2012      Oak Ridge National Labs.  All rights reserved.
 * Copyright (c) 2012      Oracle and/or its affiliates.  All rights reserved.
 * Copyright (c) 2015      Research Organization for Information Science
 *                         and Technology (RIST). All rights reserved.
 * Copyright (c) 2020-2021 The University of Tennessee and The University
 *                         of Tennessee Research Foundation.  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/mca/pml/pml.h"
#include "ompi/memchecker.h"
#include "ompi/request/request.h"
#include "ompi/message/message.h"

#if OMPI_BUILD_MPI_PROFILING
#if OPAL_HAVE_WEAK_SYMBOLS
#pragma weak MPI_Mprobe = PMPI_Mprobe
#endif
#define MPI_Mprobe PMPI_Mprobe
#endif

static const char FUNC_NAME[] = "MPI_Mprobe";

int MPI_Mprobe(int source, int tag, MPI_Comm comm,
               MPI_Message *message, MPI_Status *status)
{
    int rc;

    MEMCHECKER(
        memchecker_comm(comm);
    );

    if ( MPI_PARAM_CHECK ) {
        rc = MPI_SUCCESS;
        OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
        if (((tag < 0) && (tag != MPI_ANY_TAG)) || (tag > mca_pml.pml_max_tag)) {
            rc = MPI_ERR_TAG;
        } else if (ompi_comm_invalid(comm)) {
            rc = MPI_ERR_COMM;
        } else if ((source != MPI_ANY_SOURCE) &&
                   (MPI_PROC_NULL != source) &&
                   ompi_comm_peer_invalid(comm, source)) {
            rc = MPI_ERR_RANK;
        } else if (NULL == message) {
            rc = MPI_ERR_REQUEST;
        }
        OMPI_ERRHANDLER_CHECK(rc, comm, rc, FUNC_NAME);
    }

    if (MPI_PROC_NULL == source) {
        if (MPI_STATUS_IGNORE != status) {
            OMPI_COPY_STATUS(status, ompi_request_empty.req_status, false);
            /* Per MPI-1, the MPI_ERROR field is not defined for
               single-completion calls */
            MEMCHECKER(
                opal_memchecker_base_mem_undefined(&status->MPI_ERROR, sizeof(int));
            );
        }
        *message = &ompi_message_no_proc.message;
        return MPI_SUCCESS;
    }

#if OPAL_ENABLE_FT_MPI
    /*
     * Check here for issues with the peer, so we do not have to duplicate the
     * functionality in the PML.
     */
    if( OPAL_UNLIKELY(!ompi_comm_iface_p2p_check_proc(comm, source, &rc)) ) {
        if (MPI_STATUS_IGNORE != status) {
            status->MPI_SOURCE = source;
            status->MPI_TAG    = tag;
        }
        *message = &ompi_message_no_proc.message;
        OMPI_ERRHANDLER_RETURN(rc, comm, rc, FUNC_NAME);
    }
#endif

    rc = MCA_PML_CALL(mprobe(source, tag, comm, message, status));
    /* Per MPI-1, the MPI_ERROR field is not defined for
       single-completion calls */
    MEMCHECKER(
        opal_memchecker_base_mem_undefined(&status->MPI_ERROR, sizeof(int));
    );

    OMPI_ERRHANDLER_RETURN(rc, comm, rc, FUNC_NAME);
}