+ XBT_VERB("Create context %s", actor->get_cname());
+ xbt_assert(simix_global != nullptr, "simix is not initialized, please call MSG_init first");
+ actor->context_.reset(simix_global->context_factory->attach(actor));
+
+ /* Add properties */
+ if (properties != nullptr)
+ for (auto const& kv : *properties)
+ actor->set_property(kv.first, kv.second);
+
+ /* Add the process to it's host process list */
+ host->pimpl_->process_list_.push_back(*actor);
+
+ /* Now insert it in the global process list and in the process to run list */
+ simix_global->process_list[actor->get_pid()] = actor;
+ XBT_DEBUG("Inserting [%p] %s(%s) in the to_run list", actor, actor->get_cname(), host->get_cname());
+ simix_global->actors_to_run.push_back(actor);
+ intrusive_ptr_add_ref(actor);
+
+ auto* context = dynamic_cast<simgrid::kernel::context::AttachContext*>(actor->context_.get());
+ xbt_assert(nullptr != context, "Not a suitable context");
+ context->attach_start();
+
+ /* The on_creation() signal must be delayed until there, where the pid and everything is set */
+ simgrid::s4u::ActorPtr tmp = actor->iface(); // Passing this directly to on_creation will lead to crashes
+ simgrid::s4u::Actor::on_creation(tmp);
+
+ return ActorImplPtr(actor);
+}
+/** @brief Detach an actor attached with `attach()`