C++ (Cpp) generic_write_room Examples

Example #1

static int serial_write_room (struct tty_struct *tty) 
{
	struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
	int retval = -EINVAL;

	if (!serial)
		return -ENODEV;

	down (&port->sem);

	dbg("%s - port %d", __FUNCTION__, port->number);

	if (!port->open_count) {
		dbg("%s - port not open", __FUNCTION__);
		goto exit;
	}

	/* pass on to the driver specific version of this function if it is available */
	if (serial->type->write_room)
		retval = serial->type->write_room(port);
	else
		retval = generic_write_room(port);

exit:
	up (&port->sem);
	return retval;
}

Example #2

File: usbserial.c Project: nhanh0/hah

static int serial_write_room (struct tty_struct *tty) 
{
	struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);

	if (!serial) {
		return -ENODEV;
	}

	dbg(__FUNCTION__ " - port %d", port->number);
	
	if (!port->active) {
		dbg (__FUNCTION__ " - port not open");
		return -EINVAL;
	}

	/* pass on to the driver specific version of this function if it is available */
	if (serial->type->write_room) {
		return (serial->type->write_room(port));
	} else {
		return (generic_write_room(port));
	}
}