/*** Called on each newly created object */
static simgrid::xbt::signal<void(Host&)> onCreation;
/*** Called just before destructing an object */
static simgrid::xbt::signal<void(Host&)> onDestruction;
/*** Called when the machine is turned on or off */
static simgrid::xbt::signal<void(Host&)> onStateChange;
/*** Called on each newly created object */
static simgrid::xbt::signal<void(Host&)> onCreation;
/*** Called just before destructing an object */
static simgrid::xbt::signal<void(Host&)> onDestruction;
/*** Called when the machine is turned on or off */
static simgrid::xbt::signal<void(Host&)> onStateChange;