OPTC_PIPE_CONTROL_LOCK
seq_state->steps[*seq_state->num_steps].func = OPTC_PIPE_CONTROL_LOCK;
block_sequence[*num_steps].func = OPTC_PIPE_CONTROL_LOCK;
block_sequence[*num_steps].func = OPTC_PIPE_CONTROL_LOCK;
case OPTC_PIPE_CONTROL_LOCK: