/* -*- 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"
#include "mpicomm.h"
/* -- Begin Profiling Symbol Block for routine MPI_Comm_group */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Comm_group = PMPI_Comm_group
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Comm_group MPI_Comm_group
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Comm_group as PMPI_Comm_group
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Comm_group(MPI_Comm comm, MPI_Group * group)
__attribute__ ((weak, alias("PMPI_Comm_group")));
#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_Comm_group
#define MPI_Comm_group PMPI_Comm_group
#undef FUNCNAME
#define FUNCNAME MPIR_Comm_group_impl
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPIR_Comm_group_impl(MPIR_Comm * comm_ptr, MPIR_Group ** group_ptr)
{
int mpi_errno = MPI_SUCCESS;
int i, lpid, n;
int comm_world_size = MPIR_Process.comm_world->local_size;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPIR_COMM_GROUP_IMPL);
MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPIR_COMM_GROUP_IMPL);
/* Create a group if necessary and populate it with the
* local process ids */
if (!comm_ptr->local_group) {
n = comm_ptr->local_size;
mpi_errno = MPIR_Group_create(n, group_ptr);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
(*group_ptr)->is_local_dense_monotonic = TRUE;
for (i = 0; i < n; i++) {
(void) MPID_Comm_get_lpid(comm_ptr, i, &lpid, FALSE);
(*group_ptr)->lrank_to_lpid[i].lpid = lpid;
if (lpid > comm_world_size ||
(i > 0 && (*group_ptr)->lrank_to_lpid[i - 1].lpid != (lpid - 1))) {
(*group_ptr)->is_local_dense_monotonic = FALSE;
}
}
(*group_ptr)->size = n;
(*group_ptr)->rank = comm_ptr->rank;
(*group_ptr)->idx_of_first_lpid = -1;
comm_ptr->local_group = *group_ptr;
} else {
*group_ptr = comm_ptr->local_group;
}
/* FIXME : Add a sanity check that the size of the group is the same as
* the size of the communicator. This helps catch corrupted
* communicators */
MPIR_Group_add_ref(comm_ptr->local_group);
fn_exit:
MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPIR_COMM_GROUP_IMPL);
return mpi_errno;
fn_fail:
goto fn_exit;
}
#endif
#undef FUNCNAME
#define FUNCNAME MPI_Comm_group
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_Comm_group - Accesses the group associated with given communicator
Input Parameters:
. comm - Communicator (handle)
Output Parameters:
. group - Group in communicator (handle)
Notes:
.N COMMNULL
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_COMM
@*/
int MPI_Comm_group(MPI_Comm comm, MPI_Group * group)
{
int mpi_errno = MPI_SUCCESS;
MPIR_Comm *comm_ptr = NULL;
MPIR_Group *group_ptr;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_COMM_GROUP);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_COMM_GROUP);
/* Validate parameters, especially handles needing to be converted */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_COMM(comm, mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* Convert MPI object handles to object pointers */
MPIR_Comm_get_ptr(comm, comm_ptr);
/* Validate parameters and objects (post conversion) */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
/* Validate comm_ptr */
MPIR_Comm_valid_ptr(comm_ptr, mpi_errno, TRUE);
/* If comm_ptr is not valid, it will be reset to null */
if (mpi_errno)
goto fn_fail;
MPIR_ERRTEST_ARGNULL(group, "group", mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
mpi_errno = MPIR_Comm_group_impl(comm_ptr, &group_ptr);
if (mpi_errno)
goto fn_fail;
*group = group_ptr->handle;
/* ... end of body of routine ... */
fn_exit:
MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_COMM_GROUP);
MPID_THREAD_CS_EXIT(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
return mpi_errno;
fn_fail:
/* --BEGIN ERROR HANDLING-- */
#ifdef HAVE_ERROR_CHECKING
{
mpi_errno =
MPIR_Err_create_code(mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER,
"**mpi_comm_group", "**mpi_comm_group %C %p", comm, group);
}
#endif
mpi_errno = MPIR_Err_return_comm(comm_ptr, FCNAME, mpi_errno);
goto fn_exit;
/* --END ERROR HANDLING-- */
}