Function std_hw_dev_acquisition_stop_serial

libsigrok4DSL/std.c:125–165

* Standard sr_session_stop() API helper. * * This function can be used to simplify most (serial port based) driver's * hw_dev_acquisition_stop() API callback. * * @param sdi The device instance for which acquisition should stop. * Must not be NULL. * @param cb_data Opaque 'cb_data' pointer. Must not be NULL. * @param hw_dev_close_fn Function pointer to the driver's hw_dev_close(

 *         SR_ERR upon other errors.
 */
SR_PRIV int std_hw_dev_acquisition_stop_serial(struct sr_dev_inst *sdi,
			void *cb_data, dev_close_t hw_dev_close_fn,
			struct sr_serial_dev_inst *serial, const char *prefix)
{
	int ret;
	struct sr_datafeed_packet packet;

	if (!prefix) {
		sr_err("Invalid prefix.");
		return SR_ERR_ARG;
	}

	if (sdi->status != SR_ST_ACTIVE) {
		sr_err("%sDevice inactive, can't stop acquisition.", prefix);
		return SR_ERR;
	}

	sr_dbg("%sStopping acquisition.", prefix);

	if ((ret = sr_source_remove(serial->fd)) < 0) {
		sr_err("%sFailed to remove source: %d.", prefix, ret);
		return ret;
	}

	if ((ret = hw_dev_close_fn(sdi)) < 0) {
		sr_err("%sFailed to close device: %d.", prefix, ret);
		return ret;
	}

	/* Send SR_DF_END packet to the session bus. */
	sr_dbg("%sSending SR_DF_END packet.", prefix);
	packet.type = SR_DF_END;
    packet.status = SR_PKT_OK;
	packet.payload = NULL;
	if ((ret = ds_data_forward(cb_data, &packet)) < 0) {
		sr_err("%sFailed to send SR_DF_END packet: %d.", prefix, ret);
		return ret;
	}

	return SR_OK;
}