mostly works!

occasional deadlock at last test; gonna keep checking that out.

SpacemanDMM.toml

@@ -1,2 +1,5 @@
 [langserver]
 dreamchecker = true
+
+[debugger]
+engine = "auxtools"

code/__DEFINES/spaceman_dmm.dm

@@ -28,6 +28,5 @@
 	#define VAR_PROTECTED var
 #endif
 
-/world/proc/enable_debugger()
-    if (fexists(EXTOOLS))
-        call(EXTOOLS, "debug_initialize")()
+/proc/enable_debugging()
+    CRASH("Auxtools not found")

code/__HELPERS/_extools_api.dm

@@ -4,11 +4,16 @@
 
 /proc/extools_finalize_logging()
 
-/proc/auxtools_stack_trace(err)
-	stack_trace(err)
+/proc/auxtools_stack_trace(msg)
+	CRASH(msg)
 
 GLOBAL_VAR_INIT(auxtools_initialized,FALSE)
 
 #define AUXTOOLS_CHECK\
 	if (!GLOB.auxtools_initialized && fexists(AUXTOOLS) && findtext(call(AUXTOOLS,"auxtools_init")(),"SUCCESS"))\
 		GLOB.auxtools_initialized = TRUE;\
+
+#define AUXTOOLS_SHUTDOWN\
+	if (GLOB.auxtools_initialized && fexists(AUXTOOLS))\
+		call(AUXTOOLS,"auxtools_shutdown")();\
+		GLOB.auxtools_initialized = FALSE;\

code/controllers/subsystem/air.dm

@@ -37,9 +37,16 @@ SUBSYSTEM_DEF(air)
 
 	var/log_explosive_decompression = TRUE // If things get spammy, admemes can turn this off.
 
-	var/monstermos_turf_limit = 10
-	var/monstermos_hard_turf_limit = 2000
-	var/monstermos_enabled = TRUE
+	// Max number of turfs equalization will grab.
+	var/equalize_turf_limit = 25
+	// Max number of turfs to look for a space turf, and max number of turfs that will be decompressed.
+	var/equalize_hard_turf_limit = 2000
+	// Whether equalization should be enabled at all.
+	var/equalize_enabled = TRUE
+	// Max number of times process_turfs will share in a tick.
+	var/share_max_steps = 1
+	// If process_turfs finds no pressure differentials larger than this, it'll stop for that tick.
+	var/share_pressure_diff_to_stop = 101.325
 
 /datum/controller/subsystem/air/stat_entry(msg)
 	msg += "C:{"
@@ -234,7 +241,7 @@ SUBSYSTEM_DEF(air)
 			return
 
 /datum/controller/subsystem/air/proc/process_turf_equalize(resumed = 0)
-	if(process_turf_equalize_extools(MC_TICK_REMAINING_MS))
+	if(process_turf_equalize_extools(resumed,MC_TICK_REMAINING_MS))
 		pause()
 	/*
 	//cache for sanic speed
@@ -254,7 +261,7 @@ SUBSYSTEM_DEF(air)
 	*/
 
 /datum/controller/subsystem/air/proc/process_turfs(resumed = 0)
-	if(process_turfs_extools(MC_TICK_REMAINING_MS))
+	if(process_turfs_extools(resumed,MC_TICK_REMAINING_MS))
 		pause()
 	/*
 	//cache for sanic speed
@@ -272,12 +279,8 @@ SUBSYSTEM_DEF(air)
 			return
 	*/
 
-/proc/post_process_excited_turf(turf/open/T)
-	if(istype(T))
-		T.update_visuals()
-
 /datum/controller/subsystem/air/proc/process_excited_groups(resumed = 0)
-	if(!process_excited_groups_extools(MC_TICK_REMAINING_MS))
+	if(!process_excited_groups_extools(resumed,MC_TICK_REMAINING_MS))
 		pause()
 
 /datum/controller/subsystem/air/proc/process_turfs_extools()

code/game/turfs/change_turf.dm

@@ -156,6 +156,7 @@ GLOBAL_LIST_INIT(blacklisted_automated_baseturfs, typecacheof(list(
 	else
 		if(ispath(path,/turf/closed))
 			flags |= CHANGETURF_RECALC_ADJACENT
+			update_air_ref(-1)
 		return ..()
 
 // Take off the top layer turf and replace it with the next baseturf down

code/game/turfs/turf.dm

@@ -92,6 +92,7 @@
 		var/turf/open/O = src
 		__auxtools_update_turf_temp_info(isspaceturf(get_z_base_turf()) && !O.planetary_atmos)
 	else
+		update_air_ref(-1)
 		__auxtools_update_turf_temp_info(isspaceturf(get_z_base_turf()))
 
 	return INITIALIZE_HINT_NORMAL

code/game/world.dm

@@ -10,12 +10,14 @@ GLOBAL_LIST(topic_status_cache)
 //So subsystems globals exist, but are not initialised
 
 /world/New()
+	var/debug_server = world.GetConfig("env", "AUXTOOLS_DEBUG_DLL")
+	if (debug_server)
+		call(debug_server, "auxtools_init")()
+		enable_debugging()
 	AUXTOOLS_CHECK
-	//enable_debugger()
 #ifdef REFERENCE_TRACKING
 	enable_reference_tracking()
 #endif
-
 	world.Profile(PROFILE_START)
 
 	log_world("World loaded at [TIME_STAMP("hh:mm:ss", FALSE)]!")
@@ -269,6 +271,10 @@ GLOBAL_LIST(topic_status_cache)
 
 /world/Del()
 	shutdown_logging() // makes sure the thread is closed before end, else we terminate
+	AUXTOOLS_SHUTDOWN
+	var/debug_server = world.GetConfig("env", "AUXTOOLS_DEBUG_DLL")
+	if (debug_server)
+		call(debug_server, "auxtools_shutdown")()
 	..()
 
 /world/proc/update_status()