/* -*- 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 "topo.h"
/* -- Begin Profiling Symbol Block for routine MPI_Graphdims_get */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Graphdims_get = PMPI_Graphdims_get
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Graphdims_get MPI_Graphdims_get
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Graphdims_get as PMPI_Graphdims_get
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Graphdims_get(MPI_Comm comm, int *nnodes, int *nedges) __attribute__((weak,alias("PMPI_Graphdims_get")));
#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_Graphdims_get
#define MPI_Graphdims_get PMPI_Graphdims_get
#endif
#undef FUNCNAME
#define FUNCNAME MPI_Graphdims_get
/*@
MPI_Graphdims_get - Retrieves graph topology information associated with a
communicator
Input Parameters:
. comm - communicator for group with graph structure (handle)
Output Parameters:
+ nnodes - number of nodes in graph (integer)
- nedges - number of edges in graph (integer)
.N SignalSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_TOPOLOGY
.N MPI_ERR_COMM
.N MPI_ERR_ARG
@*/
int MPI_Graphdims_get(MPI_Comm comm, int *nnodes, int *nedges)
{
static const char FCNAME[] = "MPI_Graphdims_get";
int mpi_errno = MPI_SUCCESS;
MPID_Comm *comm_ptr = NULL;
MPIR_Topology *topo_ptr;
MPID_MPI_STATE_DECL(MPID_STATE_MPI_GRAPHDIMS_GET);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_GRAPHDIMS_GET);
/* 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
/* Convert MPI object handles to object pointers */
MPID_Comm_get_ptr( comm, comm_ptr );
/* Validate parameters and objects (post conversion) */
# ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
/* Validate comm_ptr */
MPID_Comm_valid_ptr( comm_ptr, mpi_errno, TRUE );
if (mpi_errno) goto fn_fail;
/* If comm_ptr is not valid, it will be reset to null */
MPIR_ERRTEST_ARGNULL(nnodes, "nnodes", mpi_errno );
MPIR_ERRTEST_ARGNULL(nedges, "nedges", mpi_errno );
}
MPID_END_ERROR_CHECKS;
}
# endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
topo_ptr = MPIR_Topology_get( comm_ptr );
MPIR_ERR_CHKANDJUMP((!topo_ptr || topo_ptr->kind != MPI_GRAPH), mpi_errno, MPI_ERR_TOPOLOGY, "**notgraphtopo");
/* Set nnodes */
*nnodes = topo_ptr->topo.graph.nnodes;
/* Set nedges */
*nedges = topo_ptr->topo.graph.nedges;
/* ... end of body of routine ... */
fn_exit:
MPID_MPI_FUNC_EXIT(MPID_STATE_MPI_GRAPHDIMS_GET);
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_graphdims_get",
"**mpi_graphdims_get %C %p %p", comm, nnodes, nedges);
}
# endif
mpi_errno = MPIR_Err_return_comm( comm_ptr, FCNAME, mpi_errno );
goto fn_exit;
/* --END ERROR HANDLING-- */
}