[MIRROR] Signal Handler Preperation (#10917)

Co-authored-by: Will <7099514+Willburd@users.noreply.github.com>
Co-authored-by: Cameron Lennox <killer65311@gmail.com>

code/game/machinery/camera/motion.dm

@@ -55,7 +55,6 @@
 	return 1
 
 /obj/machinery/camera/HasProximity(turf/T, datum/weakref/WF, old_loc)
-	SIGNAL_HANDLER
 	if(isnull(WF))
 		return
 	var/atom/movable/AM = WF.resolve()

code/game/machinery/doors/windowdoor.dm

@@ -119,8 +119,11 @@
 		operating = 1
 	flick(text("[src.base_state]opening"), src)
 	playsound(src, 'sound/machines/door/windowdoor.ogg', 100, 1)
-	sleep(10)
+	addtimer(CALLBACK(src, PROC_REF(finish_open)), 1 SECONDS, TIMER_DELETE_ME)
 
+/obj/machinery/door/window/proc/finish_open()
+	PRIVATE_PROC(TRUE)
+	SHOULD_NOT_OVERRIDE(TRUE)
 	explosion_resistance = 0
 	density = FALSE
 	update_icon()
@@ -141,8 +144,11 @@
 	update_icon()
 	explosion_resistance = initial(explosion_resistance)
 	update_nearby_tiles()
+	addtimer(CALLBACK(src, PROC_REF(finish_close)), 1 SECONDS, TIMER_DELETE_ME)
 
-	sleep(10)
+/obj/machinery/door/window/proc/finish_close()
+	PRIVATE_PROC(TRUE)
+	SHOULD_NOT_OVERRIDE(TRUE)
 	operating = FALSE
 	return TRUE
 

code/game/machinery/flasher.dm

@@ -98,7 +98,6 @@
 	..(severity)
 
 /obj/machinery/flasher/portable/HasProximity(turf/T, datum/weakref/WF, oldloc)
-	SIGNAL_HANDLER
 	if(isnull(WF))
 		return