The set_level() method sets the interrupt level on the target
object; zero indicates that no interrupt is requested. The interrupt source
should implement the vectored_interrupt_source interface.
SIM_INTERFACE(vectored_interrupt) {
void (*set_level)(conf_object_t *NOTNULL obj,
conf_object_t *NOTNULL source, int level);
};
#define VECTORED_INTERRUPT_INTERFACE "vectored_interrupt"