From 42588282f84f381e1998aa991d6bf0d63f991e00 Mon Sep 17 00:00:00 2001
From: Mykhailo Bykhovtsev <mikebykhovtsev@gmail.com>
Date: Tue, 24 Dec 2019 09:03:18 -0800
Subject: [PATCH] Suspending different subsystems during explosion (#7760)

---
 code/controllers/controller.dm                |  2 +-
 code/controllers/subsystems/air.dm            |  6 +++
 code/controllers/subsystems/machinery.dm      |  7 ++++
 code/controllers/subsystems/mob_ai.dm         |  6 +++
 .../subsystems/processing/processing.dm       |  6 +++
 html/changelogs/Sindorman-explosions.yml      | 42 +++++++++++++++++++
 6 files changed, 68 insertions(+), 1 deletion(-)
 create mode 100644 html/changelogs/Sindorman-explosions.yml

diff --git a/code/controllers/controller.dm b/code/controllers/controller.dm
index c31fca81748..9a80b36b739 100644
--- a/code/controllers/controller.dm
+++ b/code/controllers/controller.dm
@@ -14,7 +14,7 @@
 
 // Called when SSexplosives begins processing explosions.
 /datum/controller/proc/ExplosionStart()
-
+	
 // Called when SSexplosives finishes processing all queued explosions.
 /datum/controller/proc/ExplosionEnd()
 
diff --git a/code/controllers/subsystems/air.dm b/code/controllers/subsystems/air.dm
index eaa85a25d08..aeda1d0969b 100644
--- a/code/controllers/subsystems/air.dm
+++ b/code/controllers/subsystems/air.dm
@@ -438,3 +438,9 @@ Total Unsimulated Turfs: [world.maxx*world.maxy*world.maxz - simulated_turf_coun
 	edges -= E
 	if(!E.sleeping)
 		active_edges -= E
+
+/datum/controller/subsystem/air/ExplosionStart()
+	suspend()
+
+/datum/controller/subsystem/air/ExplosionEnd()
+	wake()
\ No newline at end of file
diff --git a/code/controllers/subsystems/machinery.dm b/code/controllers/subsystems/machinery.dm
index 0297414d108..53e9606a74b 100644
--- a/code/controllers/subsystems/machinery.dm
+++ b/code/controllers/subsystems/machinery.dm
@@ -221,4 +221,11 @@
 	if (remove_from_global)
 		SSmachinery.all_machines -= M
 
+
+/datum/controller/subsystem/machinery/ExplosionStart()
+	suspend()
+
+/datum/controller/subsystem/machinery/ExplosionEnd()
+	wake()
+
 #undef MACHINERY_GO_TO_NEXT
diff --git a/code/controllers/subsystems/mob_ai.dm b/code/controllers/subsystems/mob_ai.dm
index d381ff63668..0fc3845c83a 100644
--- a/code/controllers/subsystems/mob_ai.dm
+++ b/code/controllers/subsystems/mob_ai.dm
@@ -64,3 +64,9 @@
 
 /mob/proc/on_think_enabled()
 	return
+
+/datum/controller/subsystem/mob_ai/ExplosionStart()
+	suspend()
+
+/datum/controller/subsystem/mob_ai/ExplosionEnd()
+	wake()
\ No newline at end of file
diff --git a/code/controllers/subsystems/processing/processing.dm b/code/controllers/subsystems/processing/processing.dm
index b989da7d9da..1ff5afc46d7 100644
--- a/code/controllers/subsystems/processing/processing.dm
+++ b/code/controllers/subsystems/processing/processing.dm
@@ -36,3 +36,9 @@ var/datum/controller/subsystem/processing/SSprocessing
 // Helper so PROCESS_KILL works.
 /datum/controller/subsystem/processing/proc/stop_processing(datum/D)
 	STOP_PROCESSING(src, D)
+
+/datum/controller/subsystem/processing/ExplosionStart()
+	suspend()
+
+/datum/controller/subsystem/processing/ExplosionEnd()
+	wake() 
diff --git a/html/changelogs/Sindorman-explosions.yml b/html/changelogs/Sindorman-explosions.yml
new file mode 100644
index 00000000000..bb7116da652
--- /dev/null
+++ b/html/changelogs/Sindorman-explosions.yml
@@ -0,0 +1,42 @@
+################################
+# Example Changelog File
+#
+# Note: This file, and files beginning with ".", and files that don't end in ".yml" will not be read. If you change this file, you will look really dumb.
+#
+# Your changelog will be merged with a master changelog. (New stuff added only, and only on the date entry for the day it was merged.)
+# When it is, any changes listed below will disappear.
+#
+# Valid Prefixes: 
+#   bugfix
+#   wip (For works in progress)
+#   tweak
+#   soundadd
+#   sounddel
+#   rscadd (general adding of nice things)
+#   rscdel (general deleting of nice things)
+#   imageadd
+#   imagedel
+#   maptweak
+#   spellcheck (typo fixes)
+#   experiment
+#   balance
+#   admin
+#   backend
+#   security
+#   refactor
+#################################
+
+# Your name.  
+author: PoZe
+
+# Optional: Remove this file after generating master changelog.  Useful for PR changelogs that won't get used again.
+delete-after: True
+
+# Any changes you've made.  See valid prefix list above.
+# INDENT WITH TWO SPACES.  NOT TABS.  SPACES.
+# SCREW THIS UP AND IT WON'T WORK.
+# Also, all entries are changed into a single [] after a master changelog generation. Just remove the brackets when you add new entries.
+# Please surround your changes in  double quotes ("), as certain characters otherwise screws up compiling. The quotes will not show up in the changelog.
+changes: 
+  - tweak: "Big(14 tiles) explosions will no longer freeze the server."
+  - backend: "During explosions Air, Processing, Machinery, Mobs AI subsytems are temporrary suspended until explosions processing is finished."