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// -*- c++ -*-
//
// Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
// University Research and Technology
// Corporation. All rights reserved.
// Copyright (c) 2004-2005 The University of Tennessee and The University
// of Tennessee Research Foundation. All rights
// reserved.
// Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
// University of Stuttgart. All rights reserved.
// Copyright (c) 2004-2005 The Regents of the University of California.
// All rights reserved.
// Copyright (c) 2007-2008 Cisco Systems, Inc. All rights reserved.
// $COPYRIGHT$
//
// Additional copyrights may follow
//
// $HEADER$
//
// do not include ompi_config.h because it kills the free/malloc defines
#include "mpi.h"
#include "ompi/mpi/cxx/mpicxx.h"
#ifdef HAVE_SCHED_H
#include <sched.h>
#endif
#include "ompi/communicator/communicator.h"
#include "ompi/attribute/attribute.h"
#include "ompi/errhandler/errhandler.h"
//
// These functions are all not inlined because they need to use locks to
// protect the handle maps and it would be bad to have those in headers
// because that would require that we always install the lock headers.
// Instead we take the function call hit (we're locking - who cares about
// a function call. And these aren't exactly the performance critical
// functions) and make everyone's life easier.
//
// construction
MPI::Comm::Comm()
{
}
// copy
MPI::Comm::Comm(const Comm_Null& data) : Comm_Null(data)
{
}
// This function needs some internal OMPI types, so it's not inlined
MPI::Errhandler
MPI::Comm::Create_errhandler(MPI::Comm::_MPI2CPP_ERRHANDLERFN_* function)
{
MPI_Errhandler c_errhandler =
ompi_errhandler_create(OMPI_ERRHANDLER_TYPE_COMM,
(ompi_errhandler_generic_handler_fn_t*) function,
OMPI_ERRHANDLER_LANG_CXX);
c_errhandler->eh_cxx_dispatch_fn =
(ompi_errhandler_cxx_dispatch_fn_t*)
ompi_mpi_cxx_comm_errhandler_invoke;
return c_errhandler;
}
//JGS I took the const out because it causes problems when trying to
//call this function with the predefined NULL_COPY_FN etc.
int
MPI::Comm::do_create_keyval(MPI_Comm_copy_attr_function* c_copy_fn,
MPI_Comm_delete_attr_function* c_delete_fn,
Copy_attr_function* cxx_copy_fn,
Delete_attr_function* cxx_delete_fn,
void* extra_state, int &keyval)
{
int ret, count = 0;
ompi_attribute_fn_ptr_union_t copy_fn;
ompi_attribute_fn_ptr_union_t delete_fn;
keyval_intercept_data_t *cxx_extra_state;
// If both the callbacks are C, then do the simple thing -- no
// need for all the C++ machinery.
if (NULL != c_copy_fn && NULL != c_delete_fn) {
copy_fn.attr_communicator_copy_fn =
(MPI_Comm_internal_copy_attr_function*) c_copy_fn;
delete_fn.attr_communicator_delete_fn = c_delete_fn;
ret = ompi_attr_create_keyval(COMM_ATTR, copy_fn, delete_fn,
&keyval, extra_state, 0, NULL);
if (MPI_SUCCESS != ret) {
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, ret,
"MPI::Comm::Create_keyval");
}
}
// If either callback is C++, then we have to use the C++
// callbacks for both, because we have to generate a new
// extra_state. And since we only get one extra_state (i.e., we
// don't get one extra_state for the copy callback and another
// extra_state for the delete callback), we have to use the C++
// callbacks for both (and therefore translate the C++-special
// extra_state into the user's original extra_state). Ensure to
// malloc() the struct here (vs new) so that it can be free()'ed
// by the C attribute base.
cxx_extra_state = (keyval_intercept_data_t*)
malloc(sizeof(keyval_intercept_data_t));
if (NULL == cxx_extra_state) {
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_NO_MEM,
"MPI::Comm::Create_keyval");
}
cxx_extra_state->c_copy_fn = c_copy_fn;
cxx_extra_state->cxx_copy_fn = cxx_copy_fn;
cxx_extra_state->c_delete_fn = c_delete_fn;
cxx_extra_state->cxx_delete_fn = cxx_delete_fn;
cxx_extra_state->extra_state = extra_state;
// Error check. Must have exactly 2 non-NULL function pointers.
if (NULL != c_copy_fn) {
++count;
}
if (NULL != c_delete_fn) {
++count;
}
if (NULL != cxx_copy_fn) {
++count;
}
if (NULL != cxx_delete_fn) {
++count;
}
if (2 != count) {
free(cxx_extra_state);
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_ARG,
"MPI::Comm::Create_keyval");
}
// We do not call MPI_Comm_create_keyval() here because we need to
// pass in the cxx_extra_state to the backend keyval creation so
// that when the keyval is destroyed (i.e., when its refcount goes
// to 0), the cxx_extra_state is free()'ed.
copy_fn.attr_communicator_copy_fn =
(MPI_Comm_internal_copy_attr_function*)
ompi_mpi_cxx_comm_copy_attr_intercept;
delete_fn.attr_communicator_delete_fn =
ompi_mpi_cxx_comm_delete_attr_intercept;
ret = ompi_attr_create_keyval(COMM_ATTR, copy_fn, delete_fn,
&keyval, cxx_extra_state, 0,
cxx_extra_state);
if (OMPI_SUCCESS != ret) {
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, ret,
"MPI::Comm::Create_keyval");
}
return MPI_SUCCESS;
}
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