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

/*

 *  (C) 2015 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpiimpl.h"

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

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_T_cvar_get_index = PMPI_T_cvar_get_index

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_T_cvar_get_index  MPI_T_cvar_get_index

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_T_cvar_get_index as PMPI_T_cvar_get_index

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_T_cvar_get_index(const char *name, int *cvar_index)

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

#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_index

#define MPI_T_cvar_get_index PMPI_T_cvar_get_index

#endif /* MPICH_MPI_FROM_PMPI */

#undef FUNCNAME

#define FUNCNAME MPI_T_cvar_get_index

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

/*@

MPI_T_cvar_get_index - Get the index of a control variable

Output Parameters:

. name - name of the control variable (string)

Output Parameters:

. cvar_index - index of the control variable (integer)

.N ThreadSafe

.N Errors

.N MPI_SUCCESS

.N MPI_T_ERR_INVALID_NAME

.N MPI_T_ERR_NOT_INITIALIZED

@*/

int MPI_T_cvar_get_index(const char *name, int *cvar_index)

{

    int mpi_errno = MPI_SUCCESS;

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_T_CVAR_GET_INDEX);

    MPIR_ERRTEST_MPIT_INITIALIZED(mpi_errno);

    MPIR_T_THREAD_CS_ENTER();

    MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_T_CVAR_GET_INDEX);

    /* Validate parameters */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_ERRTEST_ARGNULL(name, "name", mpi_errno);

            MPIR_ERRTEST_ARGNULL(cvar_index, "cvar_index", mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

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

    name2index_hash_t *hash_entry;

    /* Do hash lookup by the name */

    HASH_FIND_STR(cvar_hash, name, hash_entry);

    if (hash_entry != NULL) {

        *cvar_index = hash_entry->idx;

    } else {

        mpi_errno = MPI_T_ERR_INVALID_NAME;

        goto fn_fail;

    }

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

  fn_exit:

    MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_T_CVAR_GET_INDEX);

    MPIR_T_THREAD_CS_EXIT();

    return mpi_errno;

  fn_fail:

    goto fn_exit;

}