ESPResSo
Extensible Simulation Package for Research on Soft Matter Systems
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ContextManager.cpp
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1/*
2 * Copyright (C) 2020-2022 The ESPResSo project
3 *
4 * This file is part of ESPResSo.
5 *
6 * ESPResSo is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * ESPResSo is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19#include "ContextManager.hpp"
20
21#include "GlobalContext.hpp"
22#include "LocalContext.hpp"
23
25
26#include <cassert>
27#include <memory>
28#include <string>
29#include <utility>
30
31namespace ScriptInterface {
32std::shared_ptr<ObjectHandle>
33ContextManager::make_shared(CreationPolicy policy, std::string const &name,
34 const VariantMap &parameters) {
35 return context(policy)->make_shared(name, parameters);
36}
37
38std::shared_ptr<ObjectHandle>
40 auto const state =
41 Utils::unpack<std::pair<CreationPolicy, std::string>>(state_);
42
43 auto ctx = context(state.first);
44 assert(ctx);
45
46 return ObjectHandle::deserialize(state.second, *ctx);
47}
48
49std::string ContextManager::serialize(const ObjectHandle *o) const {
50 /* We treat objects without a context as local. */
51 auto ctx = o->context() ? o->context() : m_local_context.get();
52
53 return Utils::pack(std::make_pair(policy(ctx), o->serialize()));
54}
55
57 std::shared_ptr<Communication::MpiCallbacks> const &callbacks,
58 const Utils::Factory<ObjectHandle> &factory) {
59 auto local_context =
60 std::make_shared<LocalContext>(factory, callbacks->comm());
61
62 /* If there is only one node, we can treat all objects as local, and thus
63 * never invoke any callback. */
64 m_global_context =
65 (callbacks->comm().size() > 1)
66 ? std::make_shared<GlobalContext>(callbacks, local_context)
67 : std::static_pointer_cast<Context>(local_context);
68
69 m_local_context = std::move(local_context);
70}
71} // namespace ScriptInterface
ScriptInterface::ContextManager manages object creation with policies CreationPolicy.
Infrastructure to synchronize objects created on the head node with their corresponding remote copies...
std::shared_ptr< ObjectHandle > make_shared(CreationPolicy policy, std::string const &name, const VariantMap &parameters)
Get a new reference counted instance of a script interface by name.
std::string serialize(const ObjectHandle *o) const
Serialize a script interface object into a binary representation.
ContextManager(std::shared_ptr< Communication::MpiCallbacks > const &callbacks, const Utils::Factory< ObjectHandle > &factory)
std::shared_ptr< ObjectHandle > deserialize(std::string const &state_)
Get a new reference counted instance of a script interface from a serialized state.
virtual std::shared_ptr< ObjectHandle > make_shared(std::string const &name, const VariantMap &parameters)=0
Get a new reference counted instance of a script interface by name.
Base class for interface handles.
static ObjectRef deserialize(const std::string &state, Context &ctx)
Make object from serialized state.
Factory template.
Definition Factory.hpp:78
T get_value(Variant const &v)
Extract value of specific type T from a Variant.
std::unordered_map< std::string, Variant > VariantMap
Definition Variant.hpp:69
std::string pack(T const &v)
Pack a serialize type into a string.
Definition pack.hpp:38