libcamera: Add parent argument to constructors of Object-derived classes

Now that the Object class implements parent-child relationships, make it
possible to create EventNotifier and Timer instances with a parent by
adding a parent argument to their constructors.

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

include/libcamera/event_notifier.h

@@ -23,7 +23,7 @@ public:
 		Exception,
 	};
 
-	EventNotifier(int fd, Type type);
+	EventNotifier(int fd, Type type, Object *parent = nullptr);
 	virtual ~EventNotifier();
 
 	Type type() const { return type_; }

include/libcamera/timer.h

@@ -19,7 +19,7 @@ class Message;
 class Timer : public Object
 {
 public:
-	Timer();
+	Timer(Object *parent = nullptr);
 	~Timer();
 
 	void start(unsigned int msec);

src/libcamera/event_notifier.cpp

@@ -61,9 +61,10 @@ namespace libcamera {
  * \brief Construct an event notifier with a file descriptor and event type
  * \param[in] fd The file descriptor to monitor
  * \param[in] type The event type to monitor
+ * \param[in] parent The parent Object
  */
-EventNotifier::EventNotifier(int fd, Type type)
-	: fd_(fd), type_(type), enabled_(false)
+EventNotifier::EventNotifier(int fd, Type type, Object *parent)
+	: Object(parent), fd_(fd), type_(type), enabled_(false)
 {
 	setEnabled(true);
 }

src/libcamera/timer.cpp

@@ -39,9 +39,10 @@ LOG_DEFINE_CATEGORY(Timer)
 
 /**
  * \brief Construct a timer
+ * \param[in] parent The parent Object
  */
-Timer::Timer()
-	: interval_(0), deadline_(0)
+Timer::Timer(Object *parent)
+	: Object(parent), interval_(0), deadline_(0)
 {
 }