ompi/mpi/c/barrier.c

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This source file includes following definitions.
MPI_Barrier
   1 /*
   2  * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
   3  *                         University Research and Technology
   4  *                         Corporation.  All rights reserved.
   5  * Copyright (c) 2004-2018 The University of Tennessee and The University
   6  *                         of Tennessee Research Foundation.  All rights
   7  *                         reserved.
   8  * Copyright (c) 2004-2008 High Performance Computing Center Stuttgart,
   9  *                         University of Stuttgart.  All rights reserved.
  10  * Copyright (c) 2004-2005 The Regents of the University of California.
  11  *                         All rights reserved.
  12  * Copyright (c) 2015      Research Organization for Information Science
  13  *                         and Technology (RIST). All rights reserved.
  14  * $COPYRIGHT$
  15  *
  16  * Additional copyrights may follow
  17  *
  18  * $HEADER$
  19  */
  20 #include "ompi_config.h"
  21 #include <stdio.h>
  22 
  23 #include "ompi/mpi/c/bindings.h"
  24 #include "ompi/runtime/params.h"
  25 #include "ompi/communicator/communicator.h"
  26 #include "ompi/errhandler/errhandler.h"
  27 #include "ompi/memchecker.h"
  28 #include "ompi/runtime/ompi_spc.h"
  29 
  30 #if OMPI_BUILD_MPI_PROFILING
  31 #if OPAL_HAVE_WEAK_SYMBOLS
  32 #pragma weak MPI_Barrier = PMPI_Barrier
  33 #endif
  34 #define MPI_Barrier PMPI_Barrier
  35 #endif
  36 
  37 static const char FUNC_NAME[] = "MPI_Barrier";
  38 
  39 
  40 int MPI_Barrier(MPI_Comm comm)
  41 {
  42   int err = MPI_SUCCESS;
  43 
  44   SPC_RECORD(OMPI_SPC_BARRIER, 1);
  45 
  46   MEMCHECKER(
  47     memchecker_comm(comm);
  48   );
  49 
  50   /* Error checking */
  51 
  52   if (MPI_PARAM_CHECK) {
  53     OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
  54     if (ompi_comm_invalid(comm)) {
  55       return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM, FUNC_NAME);
  56     }
  57   }
  58 
  59   OPAL_CR_ENTER_LIBRARY();
  60 
  61   /* Intracommunicators: Only invoke the back-end coll module barrier
  62      function if there's more than one process in the communicator */
  63 
  64   if (OMPI_COMM_IS_INTRA(comm)) {
  65     if (ompi_comm_size(comm) > 1) {
  66       err = comm->c_coll->coll_barrier(comm, comm->c_coll->coll_barrier_module);
  67     }
  68   }
  69 
  70   /* Intercommunicators -- always invoke, because, by definition,
  71      there's always at least 2 processes in an intercommunicator. */
  72 
  73   else {
  74       err = comm->c_coll->coll_barrier(comm, comm->c_coll->coll_barrier_module);
  75   }
  76 
  77   /* All done */
  78 
  79   OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
  80 }
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root/ompi/mpi/c/barrier.c

DEFINITIONS
