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

/*

 *

 *   Copyright (C) 1997 University of Chicago.

 *   See COPYRIGHT notice in top-level directory.

 */

#include "mpioimpl.h"

#ifdef HAVE_WEAK_SYMBOLS

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_File_get_group = PMPI_File_get_group

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_File_get_group MPI_File_get_group

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_File_get_group as PMPI_File_get_group

/* end of weak pragmas */

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_File_get_group(MPI_File fh, MPI_Group * group)

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

#endif

/* Include mapping from MPI->PMPI */

#define MPIO_BUILD_PROFILING

#include "mpioprof.h"

#endif

/*@

    MPI_File_get_group - Returns the group of processes that

                         opened the file

Input Parameters:

. fh - file handle (handle)

Output Parameters:

. group - group that opened the file (handle)

.N fortran

@*/

int MPI_File_get_group(MPI_File fh, MPI_Group * group)

{

    int error_code;

    ADIO_File adio_fh;

    static char myname[] = "MPI_FILE_GET_GROUP";

    ROMIO_THREAD_CS_ENTER();

    adio_fh = MPIO_File_resolve(fh);

    /* --BEGIN ERROR HANDLING-- */

    MPIO_CHECK_FILE_HANDLE(adio_fh, myname, error_code);

    /* --END ERROR HANDLING-- */

    /* note: this will return the group of processes that called open, but

     * with deferred open this might not be the group of processes that

     * actually opened the file from the file system's perspective

     */

    error_code = MPI_Comm_group(adio_fh->comm, group);

  fn_exit:

    ROMIO_THREAD_CS_EXIT();

    return error_code;

}