51a051b072
This commit: * Adds the configury to figure out how many Fortran INTEGERs are necessary to represent the C MPI_Status (which now includes a size_t member). * Sets MPI_STATUS_SIZE to this value in mpif-config.h.in. * Adds a big comment in status_c2f.c explaining why the no changes were necessary to how we copy statuses between Fortran and C. This commit was SVN r23472. The following SVN revision numbers were found above: r23467 --> open-mpi/ompi@733d25a8a3 r23468 --> open-mpi/ompi@963fcb13a5 r23470 --> open-mpi/ompi@418b989781 r23471 --> open-mpi/ompi@bc74a446ac
98 строки
3.6 KiB
C
98 строки
3.6 KiB
C
/*
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* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2008 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2010 Cisco Systems, Inc. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include <stdio.h>
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#include "ompi/mpi/c/bindings.h"
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#include "ompi/runtime/params.h"
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#include "ompi/communicator/communicator.h"
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#include "ompi/errhandler/errhandler.h"
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#include "ompi/mpi/f77/fint_2_int.h"
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#include "ompi/mpi/f77/constants.h"
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#include "ompi/memchecker.h"
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#if OPAL_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
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#pragma weak MPI_Status_c2f = PMPI_Status_c2f
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#endif
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#if OMPI_PROFILING_DEFINES
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#include "ompi/mpi/c/profile/defines.h"
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#endif
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static const char FUNC_NAME[] = "MPI_Status_c2f";
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int MPI_Status_c2f(MPI_Status *c_status, MPI_Fint *f_status)
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{
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int i, *c_ints;
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MEMCHECKER(
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if(c_status != MPI_STATUSES_IGNORE) {
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/*
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* Before checking the complete status, we need to reset the definedness
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* of the MPI_ERROR-field (single-completion calls wait/test).
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*/
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opal_memchecker_base_mem_defined(&c_status->MPI_ERROR, sizeof(int));
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memchecker_status(c_status);
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}
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);
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OPAL_CR_NOOP_PROGRESS();
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if (MPI_PARAM_CHECK) {
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OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
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/* MPI-2:4.12.5 says that if you pass in
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MPI_STATUS[ES]_IGNORE, it's erroneous */
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if (NULL == c_status || MPI_STATUS_IGNORE == c_status ||
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MPI_STATUSES_IGNORE == c_status || NULL == f_status) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD,
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MPI_ERR_IN_STATUS, FUNC_NAME);
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}
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}
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/* Note that MPI-2.2 16.3.5 states that even the hidden data in a
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status must be converted (!). This is somewhat problematic
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because the Fortran data is all INTEGERS while the C MPI_Status
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contains a size_t. That being said, note 2 things:
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1. The _ucount and _canceled members are never accessed from
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Fortran.
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2. configure calculated a value of MPI_STATUS_SIZE to ensure
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that the Fortran status is the Right size to hold the C
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MPI_Status (including the size_t member).
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So for the purposes of this function, just copy over all the
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data as if they were int's. This works because all OMPI
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Fortran MPI API functions that take a status as an IN argument
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first call MPI_Status_f2c on it before using it (in which case
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we'll do the exact opposite copy, thereby rebuilding the size_t
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value properly before it is accessed in C).
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Note that if sizeof(int) > sizeof(INTEGER), we're potentially
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hosed anyway (i.e., even the public values in the status could
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get truncated). But if sizeof(int) == sizeof(INTEGER) or
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sizeof(int) < sizeof(INTEGER), everything should be kosher. */
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c_ints = (int*)c_status;
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for( i = 0; i < (int)(sizeof(MPI_Status) / sizeof(int)); i++ )
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f_status[i] = OMPI_INT_2_FINT(c_ints[i]);
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return MPI_SUCCESS;
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}
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