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

/*

 *

 *  (C) 2001 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpiimpl.h"

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

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Group_size = PMPI_Group_size

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Group_size  MPI_Group_size

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Group_size as PMPI_Group_size

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Group_size(MPI_Group group, int *size) __attribute__ ((weak, alias("PMPI_Group_size")));

#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_Group_size

#define MPI_Group_size PMPI_Group_size

#endif

#undef FUNCNAME

#define FUNCNAME MPI_Group_size

#undef FCNAME

#define FCNAME "MPI_Group_size"

/*@

MPI_Group_size - Returns the size of a group

Input Parameters:

+ group - group (handle)

Output Parameters:

- size - number of processes in the group (integer)

.N SignalSafe

.N Fortran

.N Errors

.N MPI_SUCCESS

.N MPI_ERR_GROUP

.N MPI_ERR_ARG

@*/

int MPI_Group_size(MPI_Group group, int *size)

{

    int mpi_errno = MPI_SUCCESS;

    MPIR_Group *group_ptr = NULL;

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_GROUP_SIZE);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_GROUP_SIZE);

    /* Validate parameters, especially handles needing to be converted */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_ERRTEST_GROUP(group, mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif

    /* Convert MPI object handles to object pointers */

    MPIR_Group_get_ptr(group, group_ptr);

    /* Validate parameters and objects (post conversion) */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            /* Validate group_ptr */

            MPIR_Group_valid_ptr(group_ptr, mpi_errno);

            /* If group_ptr is not value, it will be reset to null */

            if (mpi_errno)

                goto fn_fail;

            MPIR_ERRTEST_ARGNULL(size, "size", mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

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

    *size = group_ptr->size;

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

#ifdef HAVE_ERROR_CHECKING

  fn_exit:

#endif

    MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_GROUP_SIZE);

    return mpi_errno;

#ifdef HAVE_ERROR_CHECKING

    /* --BEGIN ERROR HANDLING-- */

  fn_fail:

    {

        mpi_errno =

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

                                 "**mpi_group_size", "**mpi_group_size %G %p", group, size);

    }

    mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);

    goto fn_exit;

    /* --END ERROR HANDLING-- */

#endif

}