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/*
* Copyright (c) 2001-2002 The Trustees of Indiana University.
* All rights reserved.
* Copyright (c) 1998-2001 University of Notre Dame.
* All rights reserved.
* Copyright (c) 1994-1998 The Ohio State University.
* All rights reserved.
*
* This file is part of the LAM/MPI software package. For license
* information, see the LICENSE file in the top level directory of the
* LAM/MPI source distribution.
*
* $HEADER$
*
* $Id: wgroup.c,v 1.3 2002/12/11 19:15:15 jsquyres Exp $
*
* Function: - get window group
* Accepts: - window
* - group (out)
* Returns: - MPI_SUCCESS or error code
*/
#include <blktype.h>
#include <mpi.h>
#include <mpisys.h>
/*@
MPI_Win_get_group - Returns a duplicate of the group of a window
Input Parameters:
+ win - window object (handle)
- group - group of processes which share access to the window (handle)
Notes:
MPI_WIN_GET_GROUP returns a duplicate of the group of the communicator
used to create the window. associated with win. The group is returned
in group.
.N fortran
.N IMPI_MPI2
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_WIN
.N MPI_ERR_ARG
.seealso MPI_Put(3), MPI_Get(3), MPI_Win_create(3), MPI_Win_start(3), MPI_Win_complete(3), MPI_Win_fence(3), MPI_Win_free(3), MPI_Accumulate(3), MPI_Win_get_group(3), MPI_Win_wait(3)
.N WEB
@*/
int MPI_Win_get_group(MPI_Win win, MPI_Group *group)
{
lam_initerr();
lam_setfunc(BLKMPIWINGETGROUP);
if (win == MPI_WIN_NULL) {
return(lam_err_comm(MPI_COMM_WORLD,
MPI_ERR_WIN, 0, "null handle"));
}
if (group == 0) {
return(lam_err_win(win, MPI_ERR_ARG, 0, "null group pointer"));
}
*group = win->w_comm->c_group;
win->w_comm->c_group->g_refcount++;
lam_resetfunc(BLKMPIWINGETGROUP);
return(MPI_SUCCESS);
}
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