C++ (Cpp) gigaset_get_cs_by_ttyの例

コード例 #1

ファイル: interface.c プロジェクト: Tigrouzen/k1099

static int if_open(struct tty_struct *tty, struct file *filp)
{
	struct cardstate *cs;
	unsigned long flags;

	gig_dbg(DEBUG_IF, "%d+%d: %s()",
		tty->driver->minor_start, tty->index, __func__);

	tty->driver_data = NULL;

	cs = gigaset_get_cs_by_tty(tty);
	if (!cs || !try_module_get(cs->driver->owner))
		return -ENODEV;

	if (mutex_lock_interruptible(&cs->mutex))
		return -ERESTARTSYS; // FIXME -EINTR?
	tty->driver_data = cs;

	++cs->open_count;

	if (cs->open_count == 1) {
		spin_lock_irqsave(&cs->lock, flags);
		cs->tty = tty;
		spin_unlock_irqrestore(&cs->lock, flags);
		tty->low_latency = 1; //FIXME test
	}

	mutex_unlock(&cs->mutex);
	return 0;
}

コード例 #2

static int if_open(struct tty_struct *tty, struct file *filp)
{
	struct cardstate *cs;

	gig_dbg(DEBUG_IF, "%d+%d: %s()",
		tty->driver->minor_start, tty->index, __func__);

	cs = gigaset_get_cs_by_tty(tty);
	if (!cs || !try_module_get(cs->driver->owner))
		return -ENODEV;

	if (mutex_lock_interruptible(&cs->mutex)) {
		module_put(cs->driver->owner);
		return -ERESTARTSYS;
	}
	tty->driver_data = cs;

	++cs->port.count;

	if (cs->port.count == 1) {
		tty_port_tty_set(&cs->port, tty);
		tty->low_latency = 1;
	}

	mutex_unlock(&cs->mutex);
	return 0;
}