uORB: Block on simulation delay for orb_check() calls as well

src/drivers/device/vdev_posix.cpp

@@ -422,6 +422,11 @@ extern "C" {
 		sim_delay = false;
 	}
 
+	bool px4_sim_delay_enabled()
+	{
+		return sim_delay;
+	}
+
 	const char *px4_get_device_names(unsigned int *handle)
 	{
 		return VDev::devList(handle);

src/modules/uORB/uORBDevices_posix.cpp

@@ -384,6 +384,11 @@ uORB::DeviceNode::poll_notify_one(px4_pollfd_struct_t *fds, pollevent_t events)
 bool
 uORB::DeviceNode::appears_updated(SubscriberData *sd)
 {
+	/* block if in simulation mode */
+	while (px4_sim_delay_enabled()) {
+		usleep(100);
+	}
+
 	//warnx("uORB::DeviceNode::appears_updated sd = %p", sd);
 	/* assume it doesn't look updated */
 	bool ret = false;

src/platforms/px4_posix.h

@@ -149,6 +149,7 @@ __EXPORT unsigned long	px4_getpid(void);
 __EXPORT void		px4_enable_sim_lockstep(void);
 __EXPORT void		px4_sim_start_delay(void);
 __EXPORT void		px4_sim_stop_delay(void);
+__EXPORT bool		px4_sim_delay_enabled(void);
 
 __END_DECLS
 #else