From a4c29238aae6f4f7925e2e82b2439eae86288f72 Mon Sep 17 00:00:00 2001
From: Atlantis <git@stepanekjakub.cz>
Date: Thu, 28 May 2015 17:11:26 +0200
Subject: [PATCH] Refactors get_apc() - Fixes #9536 - Area now has APC
 variable, instead of list. APC construction, etc. should have checks to allow
 one APC per area only, so situations with multi-APC areas are unlikely,
 unless adminbus occurs. Either way, with or without this commit, one of the
 APCs would be unoperational (no load) - get_apc() no longer uses very laggy
 locate() in contents of area. In situations where get_apc() is called
 repeately this brings massive increase in performance (from 0.120 to 0.000,
 depending on area size and amount of things in contents of that area) as it
 now only returns the apc variable.

---
 code/game/area/Space Station 13 areas.dm | 2 +-
 code/modules/power/apc.dm                | 6 +++---
 code/modules/power/powernet.dm           | 5 ++---
 3 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/code/game/area/Space Station 13 areas.dm b/code/game/area/Space Station 13 areas.dm
index 21e965244b..04d7ef41e9 100755
--- a/code/game/area/Space Station 13 areas.dm	
+++ b/code/game/area/Space Station 13 areas.dm	
@@ -46,7 +46,7 @@ NOTE: there are two lists of areas in the end of this file: centcom and station
 	var/used_environ = 0
 
 	var/has_gravity = 1
-	var/list/apc = list()
+	var/obj/machinery/power/apc/apc = null
 	var/no_air = null
 //	var/list/lights				// list of all lights on this area
 	var/list/all_doors = list()		//Added by Strumpetplaya - Alarm Change - Contains a list of doors adjacent to this area
diff --git a/code/modules/power/apc.dm b/code/modules/power/apc.dm
index f21db9327d..167139d75f 100644
--- a/code/modules/power/apc.dm
+++ b/code/modules/power/apc.dm
@@ -156,7 +156,7 @@
 		init()
 	else
 		area = get_area(src)
-		area.apc |= src
+		area.apc = src
 		opened = 1
 		operating = 0
 		name = "[area.name] APC"
@@ -171,7 +171,7 @@
 	if(operating && malf && src.z in config.station_levels) //if (is_type_in_list(get_area(src), the_station_areas))
 		malf.hacked_apcs -= src
 
-	area.apc -= src
+	area.apc = null
 	area.power_light = 0
 	area.power_equip = 0
 	area.power_environ = 0
@@ -210,7 +210,7 @@
 	else
 		src.area = get_area_name(areastring)
 		name = "\improper [area.name] APC"
-	area.apc |= src
+	area.apc = src
 	update_icon()
 
 	make_terminal()
diff --git a/code/modules/power/powernet.dm b/code/modules/power/powernet.dm
index e8d42bd2bd..1d5711b4b3 100644
--- a/code/modules/power/powernet.dm
+++ b/code/modules/power/powernet.dm
@@ -149,7 +149,6 @@
 			return C
 	return null
 
+
 /area/proc/get_apc()
-	var/obj/machinery/power/apc/FINDME = locate() in src
-	if (FINDME)
-		return FINDME
+	return apc