SGEN_FL_SUSP
(((sgen_state_t *)(stp))->sgen_flags |= SGEN_FL_SUSP)
(((sgen_state_t *)(stp))->sgen_flags &= ~SGEN_FL_SUSP)
((((sgen_state_t *)(stp))->sgen_flags & SGEN_FL_SUSP) == SGEN_FL_SUSP)