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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
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/*
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*
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* (C) 2001 by Argonne National Laboratory.
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* See COPYRIGHT in top-level directory.
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*/
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#include "mpiimpl.h"
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/* -- Begin Profiling Symbol Block for routine MPI_Win_get_group */
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#if defined(HAVE_PRAGMA_WEAK)
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#pragma weak MPI_Win_get_group = PMPI_Win_get_group
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#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
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#pragma _HP_SECONDARY_DEF PMPI_Win_get_group MPI_Win_get_group
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#elif defined(HAVE_PRAGMA_CRI_DUP)
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#pragma _CRI duplicate MPI_Win_get_group as PMPI_Win_get_group
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#elif defined(HAVE_WEAK_ATTRIBUTE)
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int MPI_Win_get_group(MPI_Win win, MPI_Group * group)
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__attribute__ ((weak, alias("PMPI_Win_get_group")));
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#endif
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/* -- End Profiling Symbol Block */
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/* Define MPICH_MPI_FROM_PMPI if weak symbols are not supported to build
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the MPI routines */
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#ifndef MPICH_MPI_FROM_PMPI
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#undef MPI_Win_get_group
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#define MPI_Win_get_group PMPI_Win_get_group
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#endif
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#undef FUNCNAME
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#define FUNCNAME MPI_Win_get_group
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#undef FCNAME
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#define FCNAME MPL_QUOTE(FUNCNAME)
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/*@
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MPI_Win_get_group - Get the MPI Group of the window object
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Input Parameters:
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. win - window object (handle)
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Output Parameters:
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. group - group of processes which share access to the window (handle)
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Notes:
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The group is a duplicate of the group from the communicator used to
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create the MPI window, and should be freed with 'MPI_Group_free' when
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it is no longer needed. This group can be used to form the group of
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neighbors for the routines 'MPI_Win_post' and 'MPI_Win_start'.
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.N ThreadSafe
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.N Fortran
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.N Errors
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.N MPI_SUCCESS
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.N MPI_ERR_WIN
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.N MPI_ERR_ARG
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.N MPI_ERR_OTHER
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@*/
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int MPI_Win_get_group(MPI_Win win, MPI_Group * group)
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{
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int mpi_errno = MPI_SUCCESS;
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MPIR_Win *win_ptr = NULL;
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MPIR_Comm *win_comm_ptr;
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MPIR_Group *group_ptr;
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MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_WIN_GET_GROUP);
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MPIR_ERRTEST_INITIALIZED_ORDIE();
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MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
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MPIR_FUNC_TERSE_RMA_ENTER(MPID_STATE_MPI_WIN_GET_GROUP);
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/* Validate parameters, especially handles needing to be converted */
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#ifdef HAVE_ERROR_CHECKING
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{
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MPID_BEGIN_ERROR_CHECKS;
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{
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MPIR_ERRTEST_WIN(win, mpi_errno);
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MPIR_ERRTEST_ARGNULL(group, "group", mpi_errno);
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}
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MPID_END_ERROR_CHECKS;
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}
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#endif
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/* Convert MPI object handles to object pointers */
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MPIR_Win_get_ptr(win, win_ptr);
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/* Validate parameters and objects (post conversion) */
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#ifdef HAVE_ERROR_CHECKING
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{
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MPID_BEGIN_ERROR_CHECKS;
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{
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/* Validate win_ptr */
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MPIR_Win_valid_ptr(win_ptr, mpi_errno);
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/* If win_ptr is not valid, it will be reset to null */
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if (mpi_errno)
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goto fn_fail;
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}
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MPID_END_ERROR_CHECKS;
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}
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#endif /* HAVE_ERROR_CHECKING */
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/* ... body of routine ... */
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win_comm_ptr = win_ptr->comm_ptr;
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mpi_errno = MPIR_Comm_group_impl(win_comm_ptr, &group_ptr);
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if (mpi_errno != MPI_SUCCESS)
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goto fn_fail;
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*group = group_ptr->handle;
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/* ... end of body of routine ... */
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fn_exit:
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MPIR_FUNC_TERSE_RMA_EXIT(MPID_STATE_MPI_WIN_GET_GROUP);
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MPID_THREAD_CS_EXIT(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
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return mpi_errno;
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fn_fail:
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/* --BEGIN ERROR HANDLING-- */
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#ifdef HAVE_ERROR_CHECKING
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{
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mpi_errno =
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MPIR_Err_create_code(mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER,
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"**mpi_win_get_group", "**mpi_win_get_group %W %p", win, group);
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}
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#endif
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mpi_errno = MPIR_Err_return_win(win_ptr, FCNAME, mpi_errno);
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goto fn_exit;
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/* --END ERROR HANDLING-- */
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}
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