/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
 * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2020 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) 2006-2007 Cisco Systems, Inc.  All rights reserved.
 * Copyright (c) 2010-2012 Oak Ridge National Labs.  All rights reserved.
 * Copyright (c) 2013      Los Alamos National Security, LLC.  All rights
 *                         reserved.
 * Copyright (c) 2015-2017 Research Organization for Information Science
 *                         and Technology (RIST). All rights reserved.
 * $COPYRIGHT$
 *
 * Additional copyrights may follow
 *
 * $HEADER$
 */

#include "ompi_config.h"

#include "ompi/mpi/c/bindings.h"
#include "ompi/runtime/params.h"
#include "ompi/communicator/communicator.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/mca/pml/pml.h"
#include "ompi/request/request.h"
#include "ompi/memchecker.h"
#include "ompi/runtime/ompi_spc.h"

#if OMPI_BUILD_MPI_PROFILING
#if OPAL_HAVE_WEAK_SYMBOLS
#pragma weak MPI_Isend = PMPI_Isend
#endif
#define MPI_Isend PMPI_Isend
#endif

static const char FUNC_NAME[] = "MPI_Isend";


int MPI_Isend(const void *buf, int count, MPI_Datatype type, int dest,
              int tag, MPI_Comm comm, MPI_Request *request)
{
    int rc = MPI_SUCCESS;

    SPC_RECORD(OMPI_SPC_ISEND, 1);

    MEMCHECKER(
        memchecker_datatype(type);
        memchecker_call(&opal_memchecker_base_isdefined, buf, count, type);
        memchecker_comm(comm);
    );

    if ( MPI_PARAM_CHECK ) {
        OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
        if (ompi_comm_invalid(comm)) {
            return OMPI_ERRHANDLER_NOHANDLE_INVOKE(MPI_ERR_COMM, FUNC_NAME);
        } else if (count < 0) {
            rc = MPI_ERR_COUNT;
        } else if (MPI_DATATYPE_NULL == type || NULL == type) {
            rc = MPI_ERR_TYPE;
        } else if (tag < 0 || tag > mca_pml.pml_max_tag) {
            rc = MPI_ERR_TAG;
        } else if (ompi_comm_peer_invalid(comm, dest) &&
                   (MPI_PROC_NULL != dest)) {
            rc = MPI_ERR_RANK;
        } else if (request == NULL) {
            rc = MPI_ERR_REQUEST;
        } else {
            OMPI_CHECK_DATATYPE_FOR_SEND(rc, type, count);
            OMPI_CHECK_USER_BUFFER(rc, buf, type, count);
        }
        OMPI_ERRHANDLER_CHECK(rc, comm, rc, FUNC_NAME);
    }

    if (MPI_PROC_NULL == dest) {
        *request = &ompi_request_empty;
        return MPI_SUCCESS;
    }

#if OPAL_ENABLE_FT_MPI
    /*
     * The request will be checked for process failure errors during the
     * completion calls. So no need to check here.
     */
#endif

    /*
     * today's MPI standard mandates the send buffer remains accessible during the send operation
     * hence memchecker cannot mark buf as non accessible, but it might mark buf as read-only in
     * order to trap end user errors. Unfortunately valgrind does not support marking buffers as read-only,
     * so there is pretty much nothing we can do here.
     */

    rc = MCA_PML_CALL(isend(buf, count, type, dest, tag,
                            MCA_PML_BASE_SEND_STANDARD, comm, request));
    OMPI_ERRHANDLER_RETURN(rc, comm, rc, FUNC_NAME);
}


