root/ompi/mpi/c/iallgather.c

DEFINITIONS

1. MPI_Iallgather

   1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
   2 /*
   3  * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
   4  *                         University Research and Technology
   5  *                         Corporation.  All rights reserved.
   6  * Copyright (c) 2004-2018 The University of Tennessee and The University
   7  *                         of Tennessee Research Foundation.  All rights
   8  *                         reserved.
   9  * Copyright (c) 2004-2008 High Performance Computing Center Stuttgart,
  10  *                         University of Stuttgart.  All rights reserved.
  11  * Copyright (c) 2004-2005 The Regents of the University of California.
  12  *                         All rights reserved.
  13  * Copyright (c) 2007      Cisco Systems, Inc.  All rights reserved.
  14  * Copyright (c) 2012      Oak Ridge National Laboratory. All rights reserved.
  15  * Copyright (c) 2013      Los Alamos National Security, LLC.  All rights
  16  *                         reserved.
  17  * Copyright (c) 2015      Research Organization for Information Science
  18  *                         and Technology (RIST). All rights reserved.
  19  * $COPYRIGHT$
  20  *
  21  * Additional copyrights may follow
  22  *
  23  * $HEADER$
  24  */
  25 
  26 #include "ompi_config.h"
  27 #include <stdio.h>
  28 
  29 #include "ompi/mpi/c/bindings.h"
  30 #include "ompi/runtime/params.h"
  31 #include "ompi/communicator/communicator.h"
  32 #include "ompi/errhandler/errhandler.h"
  33 #include "ompi/datatype/ompi_datatype.h"
  34 #include "ompi/memchecker.h"
  35 #include "ompi/runtime/ompi_spc.h"
  36 
  37 #if OMPI_BUILD_MPI_PROFILING
  38 #if OPAL_HAVE_WEAK_SYMBOLS
  39 #pragma weak MPI_Iallgather = PMPI_Iallgather
  40 #endif
  41 #define MPI_Iallgather PMPI_Iallgather
  42 #endif
  43 
  44 static const char FUNC_NAME[] = "MPI_Iallgather";
  45 
  46 
  47 int MPI_Iallgather(const void *sendbuf, int sendcount, MPI_Datatype sendtype,
  48                    void *recvbuf, int recvcount, MPI_Datatype recvtype,
  49                    MPI_Comm comm,  MPI_Request *request)
  50 {
  51     int err;
  52 
  53     SPC_RECORD(OMPI_SPC_IALLGATHER, 1);
  54 
  55     MEMCHECKER(
  56         int rank;
  57         ptrdiff_t ext;
  58 
  59         rank = ompi_comm_rank(comm);
  60         ompi_datatype_type_extent(recvtype, &ext);
  61 
  62         memchecker_datatype(recvtype);
  63         memchecker_comm(comm);
  64         /* check whether the actual send buffer is defined. */
  65         if (MPI_IN_PLACE == sendbuf) {
  66             memchecker_call(&opal_memchecker_base_isdefined,
  67                             (char *)(recvbuf)+rank*ext,
  68                             recvcount, recvtype);
  69         } else {
  70             memchecker_datatype(sendtype);
  71             memchecker_call(&opal_memchecker_base_isdefined, sendbuf, sendcount, sendtype);
  72         }
  73         /* check whether the receive buffer is addressable. */
  74         memchecker_call(&opal_memchecker_base_isaddressable, recvbuf, recvcount, recvtype);
  75     );
  76 
  77     if (MPI_PARAM_CHECK) {
  78 
  79         /* Unrooted operation -- same checks for all ranks on both
  80            intracommunicators and intercommunicators */
  81 
  82         err = MPI_SUCCESS;
  83         OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
  84         if (ompi_comm_invalid(comm)) {
  85           OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM, FUNC_NAME);
  86         } else if (MPI_DATATYPE_NULL == recvtype || NULL == recvtype) {
  87           err = MPI_ERR_TYPE;
  88         } else if (recvcount < 0) {
  89           err = MPI_ERR_COUNT;
  90         } else if ((MPI_IN_PLACE == sendbuf && OMPI_COMM_IS_INTER(comm)) ||
  91                    MPI_IN_PLACE == recvbuf) {
  92           return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ARG, FUNC_NAME);
  93         } else if (MPI_IN_PLACE != sendbuf) {
  94             OMPI_CHECK_DATATYPE_FOR_SEND(err, sendtype, sendcount);
  95         }
  96         OMPI_ERRHANDLER_CHECK(err, comm, err, FUNC_NAME);
  97     }
  98 
  99     OPAL_CR_ENTER_LIBRARY();
 100 
 101     /* Invoke the coll component to perform the back-end operation */
 102     err = comm->c_coll->coll_iallgather(sendbuf, sendcount, sendtype,
 103                                        recvbuf, recvcount, recvtype, comm,
 104                                        request, comm->c_coll->coll_iallgather_module);
 105 
 106     OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
 107 }