sg_platf_init();
simgrid::s4u::onPlatformCreated.connect(SIMIX_post_create_environment);
simgrid::s4u::Host::onCreation.connect([](simgrid::s4u::Host& host) {
- host.extension_set<simgrid::simix::Host>(new simgrid::simix::Host());
+ if (host.extension<simgrid::simix::Host>() == nullptr) // another callback to the same signal may have created it
+ host.extension_set<simgrid::simix::Host>(new simgrid::simix::Host());
});
simgrid::surf::storageCreatedCallbacks.connect([](simgrid::surf::Storage* storage) {