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