97 строки
3.0 KiB
C
97 строки
3.0 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) 2004-2005 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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* $COPYRIGHT$
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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 "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/info/info.h"
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#include <string.h>
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#if OPAL_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
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#pragma weak MPI_Info_get_nthkey = PMPI_Info_get_nthkey
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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_Info_get_nthkey";
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/**
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* MPI_Info_get_nthkey - Get a key indexed by integer from an 'MPI_Info' obje
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*
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* @param info info object (handle)
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* @param n index of key to retrieve (integer)
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* @param key character string of at least 'MPI_MAX_INFO_KEY' characters
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*
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* @retval MPI_SUCCESS
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* @retval MPI_ERR_ARG
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* @retval MPI_ERR_INFO
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* @retval MPI_ERR_INFO_KEY
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*/
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int MPI_Info_get_nthkey(MPI_Info info, int n, char *key)
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{
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int nkeys;
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int err;
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/*
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* 1. Check if info is a valid handle
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* 2. Check if there are at least (n+1) elements
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* 3. If so, give the nth defined key
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*/
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if (MPI_PARAM_CHECK) {
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OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
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if (NULL == info || MPI_INFO_NULL == info ||
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ompi_info_is_freed(info)) {
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return OMPI_ERRHANDLER_INVOKE (MPI_COMM_WORLD, MPI_ERR_INFO,
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FUNC_NAME);
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}
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if (0 > n) {
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return OMPI_ERRHANDLER_INVOKE (MPI_COMM_WORLD, MPI_ERR_ARG,
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FUNC_NAME);
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}
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if (NULL == key) {
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return OMPI_ERRHANDLER_INVOKE (MPI_COMM_WORLD, MPI_ERR_INFO_KEY,
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FUNC_NAME);
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}
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}
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OPAL_CR_ENTER_LIBRARY();
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/* Keys are indexed on 0, which makes the "n" parameter offset by
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1 from the value returned by get_nkeys(). So be sure to
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compare appropriately. */
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err = ompi_info_get_nkeys(info, &nkeys);
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OMPI_ERRHANDLER_CHECK(err, MPI_COMM_WORLD, err, FUNC_NAME);
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if (n > (nkeys - 1)) {
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OPAL_CR_EXIT_LIBRARY();
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return OMPI_ERRHANDLER_INVOKE (MPI_COMM_WORLD, MPI_ERR_INFO_KEY,
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FUNC_NAME);
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}
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/* Everything seems alright. Call the back end key copy */
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err = ompi_info_get_nthkey (info, n, key);
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OMPI_ERRHANDLER_RETURN(err, MPI_COMM_WORLD, err, FUNC_NAME);
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}
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