+namespace simgrid {
+namespace s4u {
+xbt::signal<void()> onPlatformCreated;
+xbt::signal<void()> onSimulationEnd;
+xbt::signal<void(double)> onTimeAdvance;
+xbt::signal<void(void)> onDeadlock;
+
+Engine *Engine::instance_ = nullptr; /* That singleton is awful, but I don't see no other solution right now. */
+
+
+Engine::Engine(int *argc, char **argv) {
+ xbt_assert(s4u::Engine::instance_ == nullptr, "It is currently forbidden to create more than one instance of s4u::Engine");
+ TRACE_global_init();
+ SIMIX_global_init(argc, argv);
+
+ pimpl = new kernel::EngineImpl();
+ s4u::Engine::instance_ = this;
+}
+
+Engine::~Engine()
+{
+ delete pimpl;
+ s4u::Engine::instance_ = nullptr;
+}
+
+Engine* Engine::getInstance()
+{
+ if (s4u::Engine::instance_ == nullptr)
+ return new Engine(0, nullptr);
+ else
+ return s4u::Engine::instance_;
+}
+
+void Engine::shutdown() {
+ delete s4u::Engine::instance_;
+ s4u::Engine::instance_ = nullptr;
+}
+
+double Engine::getClock()
+{
+ return SIMIX_get_clock();
+}
+
+void Engine::loadPlatform(const char *platf)
+{
+ SIMIX_create_environment(platf);
+}
+
+void Engine::registerFunction(const char*name, int (*code)(int,char**))
+{
+ SIMIX_function_register(name,code);
+}
+void Engine::registerDefault(int (*code)(int,char**))
+{
+ SIMIX_function_register_default(code);
+}
+void Engine::loadDeployment(const char *deploy)
+{
+ SIMIX_launch_application(deploy);
+}
+/** @brief Returns the amount of hosts in the platform */
+size_t Engine::getHostCount()
+{
+ return pimpl->hosts_.size();
+}
+/** @brief Fills the passed list with all hosts found in the platform */
+void Engine::getHostList(std::vector<Host*>* list)
+{
+ for (auto const& kv : pimpl->hosts_)
+ list->push_back(kv.second);
+}
+void Engine::addHost(std::string name, simgrid::s4u::Host* host)
+{
+ pimpl->hosts_[name] = host;
+}
+void Engine::delHost(std::string name)
+{
+ pimpl->hosts_.erase(name);
+}
+simgrid::s4u::Host* Engine::hostByName(std::string name)
+{
+ return pimpl->hosts_.at(name); // Will raise a std::out_of_range if the host does not exist
+}
+simgrid::s4u::Host* Engine::hostByNameOrNull(std::string name)
+{
+ auto host = pimpl->hosts_.find(name);
+ return host == pimpl->hosts_.end() ? nullptr : host->second;
+}
+
+/** @brief Returns the amount of links in the platform */
+size_t Engine::getLinkCount()
+{
+ return simgrid::surf::LinkImpl::linksCount();
+}
+/** @brief Fills the passed list with all hosts found in the platform */
+void Engine::getLinkList(std::vector<Link*>* list)
+{
+ simgrid::surf::LinkImpl::linksList(list);