/* -*- 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_num */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_T_cvar_get_num = PMPI_T_cvar_get_num
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_T_cvar_get_num  MPI_T_cvar_get_num
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_T_cvar_get_num as PMPI_T_cvar_get_num
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_T_cvar_get_num(int *num_cvar) __attribute__((weak,alias("PMPI_T_cvar_get_num")));
#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_num
#define MPI_T_cvar_get_num PMPI_T_cvar_get_num
#endif /* MPICH_MPI_FROM_PMPI */

#undef FUNCNAME
#define FUNCNAME MPI_T_cvar_get_num
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_T_cvar_get_num - Get the number of control variables

Output Parameters:
. num_cvar - returns number of control variables (integer)

.N ThreadSafe

.N Errors
.N MPI_SUCCESS
.N MPI_T_ERR_NOT_INITIALIZED
@*/
int MPI_T_cvar_get_num(int *num_cvar)
{
    int mpi_errno = MPI_SUCCESS;

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_T_CVAR_GET_NUM);
    MPIR_ERRTEST_MPIT_INITIALIZED(mpi_errno);
    MPIR_T_THREAD_CS_ENTER();
    MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_T_CVAR_GET_NUM);

    /* Validate parameters */
#   ifdef HAVE_ERROR_CHECKING
    {
        MPID_BEGIN_ERROR_CHECKS
        {
            MPIR_ERRTEST_ARGNULL(num_cvar, "num_cvar", mpi_errno);
        }
        MPID_END_ERROR_CHECKS
    }
#   endif /* HAVE_ERROR_CHECKING */


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

    *num_cvar = utarray_len(cvar_table);

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

fn_exit:
    MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_T_CVAR_GET_NUM);
    MPIR_T_THREAD_CS_EXIT();
    return mpi_errno;

fn_fail:
    /* --BEGIN ERROR HANDLING-- */
#   ifdef HAVE_ERROR_CHECKING
    {
        mpi_errno = MPIR_Err_create_code(
            mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER,
            "**mpi_t_cvar_get_num", "**mpi_t_cvar_get_num %p", num_cvar);
    }
#   endif
    mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);
    goto fn_exit;
    /* --END ERROR HANDLING-- */
}
