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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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#include "mpicomm.h"
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/* -- Begin Profiling Symbol Block for routine MPI_Comm_group */
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#if defined(HAVE_PRAGMA_WEAK)
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#pragma weak MPI_Comm_group = PMPI_Comm_group
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#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
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#pragma _HP_SECONDARY_DEF PMPI_Comm_group MPI_Comm_group
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#elif defined(HAVE_PRAGMA_CRI_DUP)
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#pragma _CRI duplicate MPI_Comm_group as PMPI_Comm_group
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#elif defined(HAVE_WEAK_ATTRIBUTE)
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int MPI_Comm_group(MPI_Comm comm, MPI_Group * group)
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__attribute__ ((weak, alias("PMPI_Comm_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_Comm_group
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#define MPI_Comm_group PMPI_Comm_group
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#undef FUNCNAME
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#define FUNCNAME MPIR_Comm_group_impl
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#undef FCNAME
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#define FCNAME MPL_QUOTE(FUNCNAME)
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int MPIR_Comm_group_impl(MPIR_Comm * comm_ptr, MPIR_Group ** group_ptr)
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{
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int mpi_errno = MPI_SUCCESS;
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int i, lpid, n;
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int comm_world_size = MPIR_Process.comm_world->local_size;
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MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPIR_COMM_GROUP_IMPL);
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MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPIR_COMM_GROUP_IMPL);
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/* Create a group if necessary and populate it with the
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* local process ids */
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if (!comm_ptr->local_group) {
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n = comm_ptr->local_size;
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mpi_errno = MPIR_Group_create(n, group_ptr);
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if (mpi_errno)
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MPIR_ERR_POP(mpi_errno);
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(*group_ptr)->is_local_dense_monotonic = TRUE;
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for (i = 0; i < n; i++) {
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(void) MPID_Comm_get_lpid(comm_ptr, i, &lpid, FALSE);
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(*group_ptr)->lrank_to_lpid[i].lpid = lpid;
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if (lpid > comm_world_size ||
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(i > 0 && (*group_ptr)->lrank_to_lpid[i - 1].lpid != (lpid - 1))) {
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(*group_ptr)->is_local_dense_monotonic = FALSE;
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}
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}
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(*group_ptr)->size = n;
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(*group_ptr)->rank = comm_ptr->rank;
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(*group_ptr)->idx_of_first_lpid = -1;
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comm_ptr->local_group = *group_ptr;
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} else {
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*group_ptr = comm_ptr->local_group;
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}
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/* FIXME : Add a sanity check that the size of the group is the same as
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* the size of the communicator. This helps catch corrupted
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* communicators */
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MPIR_Group_add_ref(comm_ptr->local_group);
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fn_exit:
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MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPIR_COMM_GROUP_IMPL);
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return mpi_errno;
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fn_fail:
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goto fn_exit;
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}
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#endif
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#undef FUNCNAME
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#define FUNCNAME MPI_Comm_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_Comm_group - Accesses the group associated with given communicator
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Input Parameters:
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. comm - Communicator (handle)
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Output Parameters:
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. group - Group in communicator (handle)
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Notes:
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.N COMMNULL
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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_COMM
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@*/
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int MPI_Comm_group(MPI_Comm comm, MPI_Group * group)
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{
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int mpi_errno = MPI_SUCCESS;
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MPIR_Comm *comm_ptr = NULL;
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MPIR_Group *group_ptr;
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MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_COMM_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_ENTER(MPID_STATE_MPI_COMM_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_COMM(comm, mpi_errno);
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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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/* Convert MPI object handles to object pointers */
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MPIR_Comm_get_ptr(comm, comm_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 comm_ptr */
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MPIR_Comm_valid_ptr(comm_ptr, mpi_errno, TRUE);
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/* If comm_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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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 /* HAVE_ERROR_CHECKING */
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/* ... body of routine ... */
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mpi_errno = MPIR_Comm_group_impl(comm_ptr, &group_ptr);
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if (mpi_errno)
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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_EXIT(MPID_STATE_MPI_COMM_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_comm_group", "**mpi_comm_group %C %p", comm, group);
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}
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#endif
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mpi_errno = MPIR_Err_return_comm(comm_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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