+
+/*
+ * 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().
+ * Must not be NULL.
+ * @param serial The serial device instance (struct serial_dev_inst *).
+ * Must not be NULL.
+ * @param prefix A driver-specific prefix string used for log messages.
+ * Must not be NULL. An empty string is allowed.
+ *
+ * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or
+ * 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.payload = NULL;
+ if ((ret = sr_session_send(cb_data, &packet)) < 0) {
+ sr_err("%sFailed to send SR_DF_END packet: %d.", prefix, ret);
+ return ret;
+ }
+
+ return SR_OK;
+}