libcamera: camera_manager: Use std::unique_ptr to store event dispatcher

The CameraManager takes ownership of the dispatcher passed to the
setEventDispatcher() function. Enforces this by using std::unique_ptr<>.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

include/libcamera/camera_manager.h

@@ -29,7 +29,7 @@ public:
 
 	static CameraManager *instance();
 
-	void setEventDispatcher(EventDispatcher *dispatcher);
+	void setEventDispatcher(std::unique_ptr<EventDispatcher> dispatcher);
 	EventDispatcher *eventDispatcher();
 
 private:
@@ -41,7 +41,7 @@ private:
 	std::unique_ptr<DeviceEnumerator> enumerator_;
 	std::vector<PipelineHandler *> pipes_;
 
-	EventDispatcher *dispatcher_;
+	std::unique_ptr<EventDispatcher> dispatcher_;
 };
 
 } /* namespace libcamera */