interfaces/wlr_input_device: introduce wlr_input_device_finish

This function releases the wlr_input_device allocated memory (it's name and
it's output name), and signals its destroy event.

include/wlr/interfaces/wlr_input_device.h

@@ -18,6 +18,13 @@ struct wlr_input_device_impl {
 void wlr_input_device_init(struct wlr_input_device *wlr_device,
 	enum wlr_input_device_type type, const struct wlr_input_device_impl *impl,
 	const char *name);
+
+/**
+ * Cleans up all of the provided wlr_input_device resources and signals the
+ * destroy event.
+ */
+void wlr_input_device_finish(struct wlr_input_device *wlr_device);
+
 void wlr_input_device_destroy(struct wlr_input_device *dev);
 
 #endif

types/wlr_input_device.c

@@ -25,6 +25,17 @@ void wlr_input_device_init(struct wlr_input_device *dev,
 	wl_signal_init(&dev->events.destroy);
 }
 
+void wlr_input_device_finish(struct wlr_input_device *wlr_device) {
+	if (!wlr_device) {
+		return;
+	}
+
+	wlr_signal_emit_safe(&wlr_device->events.destroy, wlr_device);
+
+	free(wlr_device->name);
+	free(wlr_device->output_name);
+}
+
 void wlr_input_device_destroy(struct wlr_input_device *dev) {
 	if (!dev) {
 		return;