XBT_PUBLIC void sg_host_turn_on(sg_host_t host);
XBT_PUBLIC void sg_host_turn_off(sg_host_t host);
XBT_PUBLIC int sg_host_is_on(sg_host_t host);
XBT_PUBLIC void sg_host_turn_on(sg_host_t host);
XBT_PUBLIC void sg_host_turn_off(sg_host_t host);
XBT_PUBLIC int sg_host_is_on(sg_host_t host);