int stop(sensor_observer *ob);
int set_interval(sensor_observer *ob, int32_t interval);
+ int get_interval(sensor_observer *ob, int32_t& interval);
+
int set_batch_latency(sensor_observer *ob, int32_t latency);
+ int get_batch_latency(sensor_observer *ob, int32_t &latency);
+
int set_attribute(sensor_observer *ob, int32_t attr, int32_t value);
int set_attribute(sensor_observer *ob, int32_t attr, const char *value, int len);
int flush(sensor_observer *ob);