current revision

sensors/Sensor.h

@@ -33,11 +33,19 @@ public:
 	/** stop this sensor */
 	virtual void stop() = 0;
 
+	/** whether the sensor is currently start()ed */
+	virtual bool isRunning() const = 0;
+
 	/** add the given listener to the sensor */
 	void addListener(SensorListener<T>* l) {
 		listeners.push_back(l);
 	}
 
+	/** remove the given listener from the sensor */
+	void removeListener(SensorListener<T>* l) {
+		listeners.erase(std::remove(listeners.begin(), listeners.end(), l), listeners.end());
+	}
+
 protected:
 
 	/** inform all attached listeners */