/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */

/*

 *  (C) 2011 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpiimpl.h"

/* -- Begin Profiling Symbol Block for routine MPI_T_cvar_get_info */

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_T_cvar_get_info = PMPI_T_cvar_get_info

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_T_cvar_get_info  MPI_T_cvar_get_info

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_T_cvar_get_info as PMPI_T_cvar_get_info

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_T_cvar_get_info(int cvar_index, char *name, int *name_len, int *verbosity,

                        MPI_Datatype * datatype, MPI_T_enum * enumtype, char *desc, int *desc_len,

                        int *binding, int *scope)

    __attribute__ ((weak, alias("PMPI_T_cvar_get_info")));

#endif

/* -- End Profiling Symbol Block */

/* Define MPICH_MPI_FROM_PMPI if weak symbols are not supported to build

   the MPI routines */

#ifndef MPICH_MPI_FROM_PMPI

#undef MPI_T_cvar_get_info

#define MPI_T_cvar_get_info PMPI_T_cvar_get_info

#endif /* MPICH_MPI_FROM_PMPI */

#undef FUNCNAME

#define FUNCNAME MPI_T_cvar_get_info

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

MPI_T_cvar_get_info - Get the information about a control variable

Input/Output Parameters:

+ name_len - length of the string and/or buffer for name (integer)

- desc_len - length of the string and/or buffer for desc (integer)

Input Parameters:

. cvar_index - index of the control variable to be queried, value between 0 and num_cvar-1 (integer)

Output Parameters:

+ name - buffer to return the string containing the name of the control variable (string)

. verbosity - verbosity level of this variable (integer)

. datatype - MPI datatype of the information stored in the control variable (handle)

. enumtype - optional descriptor for enumeration information (handle)

. desc - buffer to return the string containing a description of the control variable (string)

. binding - type of MPI object this variable is associated with

- scope - scope of when changes to this variable are possible (integer)

.N ThreadSafe

.N Errors

.N MPI_SUCCESS

.N MPI_T_ERR_NOT_INITIALIZED

.N MPI_T_ERR_INVALID_INDEX

@*/

int MPI_T_cvar_get_info(int cvar_index, char *name, int *name_len,

                        int *verbosity, MPI_Datatype * datatype, MPI_T_enum * enumtype,

                        char *desc, int *desc_len, int *binding, int *scope)

{

    int mpi_errno = MPI_SUCCESS;

    const cvar_table_entry_t *cvar;

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_T_CVAR_GET_INFO);

    MPIR_ERRTEST_MPIT_INITIALIZED(mpi_errno);

    MPIR_T_THREAD_CS_ENTER();

    MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_T_CVAR_GET_INFO);

    /* Validate parameters */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_ERRTEST_CVAR_INDEX(cvar_index, mpi_errno);

            /* Do not do *_TEST_ARGNULL for pointer arguments, since this is

             * allowed or will be allowed by MPI_T standard.

             */

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

    /* ... body of routine ...  */

    cvar = (cvar_table_entry_t *) utarray_eltptr(cvar_table, cvar_index);

    MPIR_T_strncpy(name, cvar->name, name_len);

    MPIR_T_strncpy(desc, cvar->desc, desc_len);

    if (verbosity != NULL)

        *verbosity = cvar->verbosity;

    if (datatype != NULL)

        *datatype = cvar->datatype;

    if (enumtype != NULL)

        *enumtype = cvar->enumtype;

    if (binding != NULL)

        *binding = cvar->bind;

    if (scope != NULL)

        *scope = cvar->scope;

    /* ... end of body of routine ... */

#ifdef HAVE_ERROR_CHECKING

  fn_exit:

#endif

    MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_T_CVAR_GET_INFO);

    MPIR_T_THREAD_CS_EXIT();

    return mpi_errno;

#ifdef HAVE_ERROR_CHECKING

  fn_fail:

    /* --BEGIN ERROR HANDLING-- */

    {

        mpi_errno =

            MPIR_Err_create_code(mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER,

                                 "**mpi_t_cvar_get_info",

                                 "**mpi_t_cvar_get_info %d %p %p %p %p %p %p %p %p %p", cvar_index,

                                 name, name_len, verbosity, datatype, enumtype, desc, desc_len,

                                 binding, scope);

    }

    mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);

    goto fn_exit;

    /* --END ERROR HANDLING-- */

#endif

}