Allows do_mob and do_after to be exclusive, to prevent stacking

code/__defines/mobs.dm

@@ -14,6 +14,7 @@
 #define GODMODE     0x1000
 #define FAKEDEATH   0x2000  // Replaces stuff like changeling.changeling_fakedeath.
 #define DISFIGURED  0x4000  // Set but never checked. Remove this sometime and replace occurences with the appropriate organ code
+#define DOING_TASK	0x8000  // Performing a do_after or do_mob that's exclusive
 
 // Grab levels.
 #define GRAB_PASSIVE    1

code/_helpers/mobs.dm

@@ -142,9 +142,14 @@ Proc for attack log creation, because really why not
 	else
 		return pick("chest", "groin")
 
-/proc/do_mob(mob/user , mob/target, time = 30, target_zone = 0, uninterruptible = FALSE, progress = TRUE, ignore_movement = FALSE)
+/proc/do_mob(mob/user , mob/target, time = 30, target_zone = 0, uninterruptible = FALSE, progress = TRUE, ignore_movement = FALSE, exclusive = FALSE)
 	if(!user || !target)
 		return 0
+	if(!time)
+		return 1 //Done!
+	if(user.status_flags & DOING_TASK)
+		to_chat(user, "<span class='warning'>You're in the middle of doing something else already.</span>")
+		return 0 //Performing an exclusive do_after or do_mob already
 	var/user_loc = user.loc
 	var/target_loc = target.loc
 
@@ -155,6 +160,10 @@ Proc for attack log creation, because really why not
 
 	var/endtime = world.time+time
 	var/starttime = world.time
+
+	if(exclusive)
+		user.status_flags |= DOING_TASK
+
 	. = TRUE
 	while (world.time < endtime)
 		stoplag(1)
@@ -186,14 +195,20 @@ Proc for attack log creation, because really why not
 			. = FALSE
 			break
 
+	if(exclusive)
+		user.status_flags &= ~DOING_TASK
+
 	if (progbar)
 		qdel(progbar)
 
-/proc/do_after(mob/user, delay, atom/target = null, needhand = TRUE, progress = TRUE, incapacitation_flags = INCAPACITATION_DEFAULT, ignore_movement = FALSE, max_distance = null)
+/proc/do_after(mob/user, delay, atom/target = null, needhand = TRUE, progress = TRUE, incapacitation_flags = INCAPACITATION_DEFAULT, ignore_movement = FALSE, max_distance = null, exclusive = FALSE)
 	if(!user)
 		return 0
 	if(!delay)
 		return 1 //Okay. Done.
+	if(user.status_flags & DOING_TASK)
+		to_chat(user, "<span class='warning'>You're in the middle of doing something else already.</span>")
+		return 0 //Performing an exclusive do_after or do_mob already
 	var/atom/target_loc = null
 	if(target)
 		target_loc = target.loc
@@ -214,6 +229,10 @@ Proc for attack log creation, because really why not
 
 	var/endtime = world.time + delay
 	var/starttime = world.time
+
+	if(exclusive)
+		user.status_flags |= DOING_TASK
+
 	. = 1
 	while (world.time < endtime)
 		stoplag(1)
@@ -250,6 +269,9 @@ Proc for attack log creation, because really why not
 			. = FALSE
 			break
 
+	if(exclusive)
+		user.status_flags &= ~DOING_TASK
+
 	if(progbar)
 		qdel(progbar)
 

code/game/objects/items/stacks/medical.dm

@@ -111,7 +111,7 @@
 					continue
 				if(used == amount)
 					break
-				if(!do_mob(user, M, W.damage/3))
+				if(!do_mob(user, M, W.damage/3, exclusive = TRUE))
 					to_chat(user, "<span class='notice'>You must stand still to bandage wounds.</span>")
 					break
 
@@ -174,7 +174,7 @@
 					continue
 				if(used == amount)
 					break
-				if(!do_mob(user, M, W.damage/5))
+				if(!do_mob(user, M, W.damage/5, exclusive = TRUE))
 					to_chat(user, "<span class='notice'>You must stand still to bandage wounds.</span>")
 					break
 
@@ -234,7 +234,7 @@
 		else
 			user.visible_message("<span class='notice'>\The [user] starts salving wounds on [M]'s [affecting.name].</span>", \
 					             "<span class='notice'>You start salving the wounds on [M]'s [affecting.name].</span>" )
-			if(!do_mob(user, M, 10))
+			if(!do_mob(user, M, 10, exclusive = TRUE))
 				to_chat(user, "<span class='notice'>You must stand still to salve wounds.</span>")
 				return 1
 			if(affecting.is_salved()) // We do a second check after the delay, in case it was bandaged after the first check.
@@ -281,7 +281,7 @@
 					continue
 				//if(used == amount) //VOREStation Edit
 				//	break //VOREStation Edit
-				if(!do_mob(user, M, W.damage/5))
+				if(!do_mob(user, M, W.damage/5, exclusive = TRUE))
 					to_chat(user, "<span class='notice'>You must stand still to bandage wounds.</span>")
 					break
 				if(affecting.is_bandaged() && affecting.is_disinfected()) // We do a second check after the delay, in case it was bandaged after the first check.
@@ -336,7 +336,7 @@
 		else
 			user.visible_message("<span class='notice'>\The [user] starts salving wounds on [M]'s [affecting.name].</span>", \
 					             "<span class='notice'>You start salving the wounds on [M]'s [affecting.name].</span>" )
-			if(!do_mob(user, M, 10))
+			if(!do_mob(user, M, 10, exclusive = TRUE))
 				to_chat(user, "<span class='notice'>You must stand still to salve wounds.</span>")
 				return 1
 			if(affecting.is_salved()) // We do a second check after the delay, in case it was bandaged after the first check.
@@ -383,7 +383,7 @@
 				to_chat(user, "<span class='danger'>You can't apply a splint to the arm you're using!</span>")
 				return
 			user.visible_message("<span class='danger'>[user] starts to apply \the [src] to their [limb].</span>", "<span class='danger'>You start to apply \the [src] to your [limb].</span>", "<span class='danger'>You hear something being wrapped.</span>")
-		if(do_after(user, 50, M))
+		if(do_after(user, 50, M, exclusive = TRUE))
 			if(affecting.splinted)
 				to_chat(user, "<span class='danger'>[M]'s [limb] is already splinted!</span>")
 				return

code/game/objects/items/stacks/nanopaste.dm

@@ -16,7 +16,7 @@
 	if (istype(M,/mob/living/silicon/robot))	//Repairing cyborgs
 		var/mob/living/silicon/robot/R = M
 		if (R.getBruteLoss() || R.getFireLoss())
-			if(do_after(user,7 * toolspeed))
+			if(do_after(user, 7 * toolspeed, exclusive = TRUE))
 				R.adjustBruteLoss(-15)
 				R.adjustFireLoss(-15)
 				R.updatehealth()
@@ -51,9 +51,9 @@
 			else if(can_use(1))
 				user.setClickCooldown(user.get_attack_speed(src))
 				if(S.open >= 2)
-					if(do_after(user,5 * toolspeed))
+					if(do_after(user, 5 * toolspeed, exclusive = TRUE))
 						S.heal_damage(restoration_internal, restoration_internal, robo_repair = 1)
-				else if(do_after(user,5 * toolspeed))
+				else if(do_after(user, 5 * toolspeed, exclusive = TRUE))
 					S.heal_damage(restoration_external,restoration_external, robo_repair =1)
 				H.updatehealth()
 				use(1)

code/game/objects/items/stacks/stack.dm

@@ -145,7 +145,7 @@
 
 	if (recipe.time)
 		to_chat(user, "<span class='notice'>Building [recipe.title] ...</span>")
-		if (!do_after(user, recipe.time))
+		if (!do_after(user, recipe.time, exclusive = TRUE))
 			return
 
 	if (use(required))

code/modules/surgery/surgery.dm

@@ -162,7 +162,7 @@
 				// Not staying still fails you too.
 				if(success)
 					var/calc_duration = rand(S.min_duration, S.max_duration)
-					if(!do_mob(user, M, calc_duration * toolspeed, zone))
+					if(!do_mob(user, M, calc_duration * toolspeed, zone, exclusive = TRUE))
 						success = FALSE
 						to_chat(user, "<span class='warning'>You must remain close to and keep focused on your patient to conduct surgery.</span>")