INST_STOP
inst->state = INST_STOP;
if (inst->state != INST_STOP)
if (inst->state < INST_INIT || inst->state >= INST_STOP)
if (inst->state < INST_INIT || inst->state >= INST_STOP)
if (!inst || !(inst->state >= INST_INIT && inst->state < INST_STOP))