static void do_catch_up()

in speakup/speakup_dectlk.c [200:292]

• 89 lines of code
• 17 McCabe index (conditional complexity)

static void do_catch_up(struct spk_synth *synth)
{
	int synth_full_val = 0;
	static u_char ch;
	static u_char last = '\0';
	unsigned long flags;
	unsigned long jiff_max;
	unsigned long timeout;
	DEFINE_WAIT(wait);
	struct var_t *jiffy_delta;
	struct var_t *delay_time;
	struct var_t *flush_time;
	int jiffy_delta_val;
	int delay_time_val;
	int timeout_val;

	jiffy_delta = spk_get_var(JIFFY);
	delay_time = spk_get_var(DELAY);
	flush_time = spk_get_var(FLUSH);
	spin_lock_irqsave(&speakup_info.spinlock, flags);
	jiffy_delta_val = jiffy_delta->u.n.value;
	timeout_val = flush_time->u.n.value;
	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
	timeout = msecs_to_jiffies(timeout_val);
	jiff_max = jiffies + jiffy_delta_val;

	while (!kthread_should_stop()) {
		/* if no ctl-a in 4, send data anyway */
		spin_lock_irqsave(&flush_lock, flags);
		while (is_flushing && timeout) {
			prepare_to_wait(&flush, &wait, TASK_INTERRUPTIBLE);
			spin_unlock_irqrestore(&flush_lock, flags);
			timeout = schedule_timeout(timeout);
			spin_lock_irqsave(&flush_lock, flags);
		}
		finish_wait(&flush, &wait);
		is_flushing = 0;
		spin_unlock_irqrestore(&flush_lock, flags);

		spin_lock_irqsave(&speakup_info.spinlock, flags);
		if (speakup_info.flushing) {
			speakup_info.flushing = 0;
			spin_unlock_irqrestore(&speakup_info.spinlock, flags);
			synth->flush(synth);
			continue;
		}
		synth_buffer_skip_nonlatin1();
		if (synth_buffer_empty()) {
			spin_unlock_irqrestore(&speakup_info.spinlock, flags);
			break;
		}
		ch = synth_buffer_peek();
		set_current_state(TASK_INTERRUPTIBLE);
		delay_time_val = delay_time->u.n.value;
		synth_full_val = synth_full();
		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
		if (ch == '\n')
			ch = 0x0D;
		if (synth_full_val || !synth->io_ops->synth_out(synth, ch)) {
			schedule_timeout(msecs_to_jiffies(delay_time_val));
			continue;
		}
		set_current_state(TASK_RUNNING);
		spin_lock_irqsave(&speakup_info.spinlock, flags);
		synth_buffer_getc();
		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
		if (ch == '[') {
			in_escape = 1;
		} else if (ch == ']') {
			in_escape = 0;
		} else if (ch <= SPACE) {
			if (!in_escape && strchr(",.!?;:", last))
				synth->io_ops->synth_out(synth, PROCSPEECH);
			if (time_after_eq(jiffies, jiff_max)) {
				if (!in_escape)
					synth->io_ops->synth_out(synth,
								 PROCSPEECH);
				spin_lock_irqsave(&speakup_info.spinlock,
						  flags);
				jiffy_delta_val = jiffy_delta->u.n.value;
				delay_time_val = delay_time->u.n.value;
				spin_unlock_irqrestore(&speakup_info.spinlock,
						       flags);
				schedule_timeout(msecs_to_jiffies
						 (delay_time_val));
				jiff_max = jiffies + jiffy_delta_val;
			}
		}
		last = ch;
	}
	if (!in_escape)
		synth->io_ops->synth_out(synth, PROCSPEECH);
}