xbt::signal<void(Host const&)> Host::on_speed_change;
xbt::signal<void(kernel::resource::CpuAction&, kernel::resource::Action::State)> Host::on_exec_state_change;
#endif
xbt::signal<void(Host const&)> Host::on_speed_change;
xbt::signal<void(kernel::resource::CpuAction&, kernel::resource::Action::State)> Host::on_exec_state_change;
#endif