+#include "simgrid/s4u/storage.hpp"
+
+xbt_dict_t host_list = nullptr; // FIXME: make it a static field of Host
+
+int MSG_HOST_LEVEL = -1;
+int USER_HOST_LEVEL = -1;
+
+namespace simgrid {
+
+namespace xbt {
+template class Extendable<simgrid::s4u::Host>;
+}
+
+namespace s4u {
+
+simgrid::xbt::signal<void(Host&)> Host::onCreation;
+simgrid::xbt::signal<void(Host&)> Host::onDestruction;
+simgrid::xbt::signal<void(Host&)> Host::onStateChange;
+
+Host::Host(const char* name)
+ : name_(name)
+{
+}
+
+Host::~Host() {
+ delete pimpl_cpu;
+ delete pimpl_netcard;
+ delete mounts;
+}
+
+Host *Host::by_name(std::string name) {
+ Host* host = Host::by_name_or_null(name.c_str());
+ // TODO, raise an exception instead?
+ if (host == nullptr)
+ xbt_die("No such host: %s", name.c_str());
+ return host;
+}
+Host* Host::by_name_or_null(const char* name)
+{
+ if (host_list == nullptr)
+ host_list = xbt_dict_new_homogeneous([](void*p) {
+ simgrid::s4u::Host* host = static_cast<simgrid::s4u::Host*>(p);
+ simgrid::s4u::Host::onDestruction(*host);
+ delete host;
+ });
+ return (Host*) xbt_dict_get_or_null(host_list, name);
+}
+Host* Host::by_name_or_create(const char* name)
+{
+ Host* host = by_name_or_null(name);
+ if (host == nullptr) {
+ host = new Host(name);
+ xbt_dict_set(host_list, name, host, nullptr);
+ }
+ return host;
+}
+
+Host *Host::current(){
+ smx_actor_t smx_proc = SIMIX_process_self();
+ if (smx_proc == nullptr)
+ xbt_die("Cannot call Host::current() from the maestro context");
+ return smx_proc->host;
+}
+
+void Host::turnOn() {
+ if (isOff()) {
+ simgrid::simix::kernelImmediate([&]{
+ this->extension<simgrid::simix::Host>()->turnOn();
+ this->extension<simgrid::surf::HostImpl>()->turnOn();
+ });
+ }
+}