/* -*- 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"
/* -- Begin Profiling Symbol Block for routine MPI_Comm_get_parent */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Comm_get_parent = PMPI_Comm_get_parent
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Comm_get_parent MPI_Comm_get_parent
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Comm_get_parent as PMPI_Comm_get_parent
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Comm_get_parent(MPI_Comm * parent) __attribute__ ((weak, alias("PMPI_Comm_get_parent")));
#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_get_parent
#define MPI_Comm_get_parent PMPI_Comm_get_parent
#endif
#undef FUNCNAME
#define FUNCNAME MPI_Comm_get_parent
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_Comm_get_parent - Return the parent communicator for this process
Output Parameters:
. parent - the parent communicator (handle)
Notes:
If a process was started with 'MPI_Comm_spawn' or 'MPI_Comm_spawn_multiple',
'MPI_Comm_get_parent' returns the parent intercommunicator of the current
process. This parent intercommunicator is created implicitly inside of
'MPI_Init' and is the same intercommunicator returned by 'MPI_Comm_spawn'
in the parents.
If the process was not spawned, 'MPI_Comm_get_parent' returns
'MPI_COMM_NULL'.
After the parent communicator is freed or disconnected, 'MPI_Comm_get_parent'
returns 'MPI_COMM_NULL'.
.N SignalSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
@*/
int MPI_Comm_get_parent(MPI_Comm * parent)
{
int mpi_errno = MPI_SUCCESS;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_COMM_GET_PARENT);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_COMM_GET_PARENT);
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_ARGNULL(parent, "parent", mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
*parent = (MPIR_Process.comm_parent == NULL) ? MPI_COMM_NULL :
(MPIR_Process.comm_parent)->handle;
/* ... end of body of routine ... */
#ifdef HAVE_ERROR_CHECKING
fn_exit:
#endif
MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_COMM_GET_PARENT);
return mpi_errno;
/* --BEGIN ERROR HANDLING-- */
#ifdef HAVE_ERROR_CHECKING
fn_fail:
{
mpi_errno =
MPIR_Err_create_code(mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER,
"**mpi_comm_get_parent", "**mpi_comm_get_parent %p", parent);
}
mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);
goto fn_exit;
#endif
/* --END ERROR HANDLING-- */
}