Sets up structs (pseudo-structs) as a replacement for datums for simp…

…le data storage

- Replaces launch metadata datum with a struct

- Some minor variable renaming, not super comprehensive tho

code/__DEFINES/_struct.dm

@@ -0,0 +1,31 @@
+#define DEFSTRUCT(type) /datum/struct/##type;
+
+#define DEFSTRUCTPROP(type, prop, _can_qdel) \
+/datum/struct/##type/var/##prop; \
+/datum/struct/##type/add_props() { \
+    ..(); \
+	can_qdel += _can_qdel; \
+    ##prop = STRUCTS.current_struct_idx++; \
+}
+
+#define ENDDEFSTRUCT(type) \
+/datum/struct/##type/proc/generate() { \
+    var/list/struct = new /list(src.len); \
+    struct[1] = #type; \
+    return struct; \
+} \
+/datum/controller/structs/var/datum/struct/##type/##type; \
+/datum/controller/structs/proc/generate_struct_##type() { \
+    ##type = new(); \
+}
+
+#define STRUCT(type) STRUCTS.##type.generate();
+#define PROP(type, prop) STRUCTS.##type.##prop
+
+// Fun pseudo function: List.[1] works
+// However SpacemanDMM throws a fit about the syntax
+// #define PROP(type, prop) [STRUCTS.##type.##prop]
+
+#define ISSTRUCT(to_test, type) (length(to_test) ? to_test[1] == #type : FALSE)
+
+#define STRUCT_PROP_STARTING_INDEX 2

code/__DEFINES/qdel.dm

@@ -56,8 +56,40 @@
 #define QDEL_IN(item, time) addtimer(CALLBACK(GLOBAL_PROC, GLOBAL_PROC_REF(qdel), (time) > GC_FILTER_QUEUE ? WEAKREF(item) : item), time, TIMER_STOPPABLE)
 #define QDEL_IN_CLIENT_TIME(item, time) addtimer(CALLBACK(GLOBAL_PROC, GLOBAL_PROC_REF(qdel), item), time, TIMER_STOPPABLE | TIMER_CLIENT_TIME)
 #define QDEL_NULL(item) qdel(item); item = null
-#define QDEL_NULL_LIST(x) if(x) { for(var/y in x) { qdel(y) }}; if(x) {x.Cut(); x = null } // Second x check to handle items that LAZYREMOVE on qdel.
+
+// Second x check to handle items that LAZYREMOVE on qdel.
+#define QDEL_NULL_LIST(x) \
+do { \
+	if(x) { for(var/y in x) { qdel(y) }}; \
+	if(x) {x.Cut(); x = null } \
+} while(FALSE);
+
+// Second struct check to handle items that LAZYREMOVE on qdel.
+#define QDEL_NULL_STRUCT(struct, type) \
+do { \
+	if(struct) { \
+		for(var/i in 1 to length(struct)) { \
+			if(STRUCTS.##type.can_qdel[i] && !isnull(struct[i])) { \
+				qdel(struct[i]); \
+			} \
+		} \
+	}; \
+	if(struct) { \
+		struct.Cut(); \
+		struct = null; \
+	}; \
+} while(FALSE);
+
 #define QDEL_LIST(L) if(L) { for(var/I in L) qdel(I); L.Cut(); }
 #define QDEL_LIST_IN(L, time) addtimer(CALLBACK(GLOBAL_PROC, GLOBAL_PROC_REF(______qdel_list_wrapper), L), time, TIMER_STOPPABLE)
 #define QDEL_LIST_ASSOC(L) if(L) { for(var/I in L) { qdel(L[I]); qdel(I); } L.Cut(); }
 #define QDEL_LIST_ASSOC_VAL(L) if(L) { for(var/I in L) qdel(L[I]); L.Cut(); }
+#define QDEL_STRUCT(struct, type) \
+if(struct) { \
+	for(var/i in 1 to length(struct)) { \
+		if(!isnull(struct[i]) && STRUCTS.##type.can_qdel[i]) { \
+			qdel(struct[i]); \
+		} \
+	}; \
+	struct.Cut(); \
+}

code/_globalvars/struct.dm

@@ -0,0 +1 @@
+GLOBAL_REAL(STRUCTS, /datum/controller/structs)

code/controllers/mc/master.dm

@@ -123,6 +123,8 @@ GLOBAL_REAL(Master, /datum/controller/master) = new
 
 	if(!GLOB)
 		new /datum/controller/global_vars
+	if(!STRUCTS)
+		new /datum/controller/structs
 
 /datum/controller/master/Destroy()
 	..()

code/controllers/struct.dm

@@ -0,0 +1,43 @@
+/datum/controller/structs
+	/**
+	 * Value for calculating the index of the struct currently being
+	 * generated
+	 * Should always be above 1, as index 1 is reserved for the struct name
+	 */
+	var/static/current_struct_idx = STRUCT_PROP_STARTING_INDEX
+
+	var/list/structs_datum_in_built_vars
+
+/datum/controller/structs/New()
+	if(STRUCTS)
+		CRASH("Multiple instances of structs controller created")
+	STRUCTS = src
+
+	var/datum/controller/exclude_these = new
+	// I know this is dumb but the nested vars list hangs a ref to the datum. This fixes that
+	var/list/controller_vars = exclude_these.vars.Copy()
+	controller_vars["vars"] = null
+	structs_datum_in_built_vars = controller_vars + list(NAMEOF(src, current_struct_idx))
+
+	QDEL_IN(exclude_these, 0) //signal logging isn't ready
+
+	log_world("[length(vars) - length(structs_datum_in_built_vars)] structs")
+
+	Initialize()
+
+/datum/controller/structs/Initialize()
+	var/list/struct_initializers = typesof(/datum/controller/structs/proc)
+	var/expected_len = length(vars) - length(structs_datum_in_built_vars)
+	if(length(struct_initializers) != expected_len)
+		warning("Unable to detect all struct initialization procs! Expected [expected_len] got [length(struct_initializers)]!")
+		if(length(struct_initializers))
+			var/list/expected_struct_initializers = vars - structs_datum_in_built_vars
+			for(var/initializer in struct_initializers)
+				expected_struct_initializers -= replacetext("[initializer]", "generate_struct_", "")
+			log_world("Structs with missing initializers: [expected_struct_initializers.Join(", ")]")
+	for(var/initializer in struct_initializers)
+		var/start_tick = world.time
+		call(src, initializer)()
+		var/end_tick = world.time
+		if(end_tick - start_tick)
+			warning("Struct [replacetext("[initializer]", "generate_struct_", "")] slept during initialization!")

code/datums/structs/_struct.dm

@@ -0,0 +1,19 @@
+/datum/struct
+	/// The length of the lists to be generated
+	/// which represent a struct
+	var/len
+
+	/// Standard list mapped 1:1 to the list produced when
+	/// struct is created using STRUCT(...)
+	var/static/list/can_qdel
+
+/datum/struct/New()
+	// First element of struct list is a string containing the struct name
+	can_qdel = list(FALSE)
+	STRUCTS.current_struct_idx = STRUCT_PROP_STARTING_INDEX
+	add_props()
+	// Index will go up by 1 when adding last element
+	len = STRUCTS.current_struct_idx - 1
+
+/datum/struct/proc/add_props()
+	return

code/datums/structs/launch_metadata.dm

@@ -0,0 +1,12 @@
+DEFSTRUCT(launch_metadata)
+DEFSTRUCTPROP(launch_metadata, pass_flags, FALSE)
+DEFSTRUCTPROP(launch_metadata, call_all, FALSE)
+DEFSTRUCTPROP(launch_metadata, target, FALSE)
+DEFSTRUCTPROP(launch_metadata, range, FALSE)
+DEFSTRUCTPROP(launch_metadata, speed, FALSE)
+DEFSTRUCTPROP(launch_metadata, thrower, FALSE)
+DEFSTRUCTPROP(launch_metadata, spin, FALSE)
+DEFSTRUCTPROP(launch_metadata, collision_callbacks, FALSE)
+DEFSTRUCTPROP(launch_metadata, end_throw_callbacks, FALSE)
+DEFSTRUCTPROP(launch_metadata, dist, FALSE)
+ENDDEFSTRUCT(launch_metadata)

code/game/atoms_movable.dm

@@ -40,7 +40,7 @@
 		qdel(I)
 	if(pulledby)
 		pulledby.stop_pulling()
-	QDEL_NULL(launch_metadata)
+	QDEL_STRUCT(launch_metadata, launch_metadata)
 	QDEL_NULL(em_block)
 	QDEL_NULL(emissive_overlay)
 

code/game/objects/items/explosives/grenades/grenade.dm

@@ -121,10 +121,11 @@
 		dangerous = FALSE
 	. = ..()
 
-/obj/item/explosive/grenade/launch_towards(datum/launch_metadata/LM)
-	if(active && ismob(LM.thrower))
-		var/mob/M = LM.thrower
-		M.count_niche_stat(STATISTICS_NICHE_GRENADES)
+/obj/item/explosive/grenade/launch_towards(list/launch_metadata)
+	var/thrower = launch_metadata[PROP(launch_metadata, thrower)]
+	if(active && ismob(thrower))
+		var/mob/mob_thrower = thrower
+		mob_thrower.count_niche_stat(STATISTICS_NICHE_GRENADES)
 	. = ..()
 
 

code/game/objects/items/shards.dm

@@ -133,8 +133,7 @@
 
 /obj/item/large_shrapnel/at_rocket_dud/launch_impact(atom/hit_atom)
 	. = ..()
-	var/datum/launch_metadata/LM = src.launch_metadata
-	var/user = LM.thrower
+	var/user = launch_metadata[PROP(launch_metadata, thrower)]
 	if(!detonating && prob(impact_sensitivity))
 		cause = "manually triggered"
 		visible_message(SPAN_DANGER("You hear the click of a mechanism triggering inside \the [src]. Uh oh."))

code/game/objects/structures/window.dm

@@ -179,7 +179,8 @@
 			anchored = FALSE
 			update_nearby_icons()
 			step(src, get_dir(AM, src))
-	healthcheck(user = AM.launch_metadata.thrower)
+	var/source = AM.launch_metadata[PROP(launch_metadata, thrower)]
+	healthcheck(user = source)
 
 /obj/structure/window/attack_hand(mob/user as mob)
 	if(user.a_intent == INTENT_HARM && ishuman(user))

code/game/turfs/open.dm

@@ -779,15 +779,15 @@
 			return
 		var/mob/unlucky_mob = AM
 		var/turf/target_turf = get_random_turf_in_range(AM.loc, 3, 0)
-		var/datum/launch_metadata/LM = new()
-		LM.target = target_turf
-		LM.range = get_dist(AM.loc, target_turf)
-		LM.speed = SPEED_FAST
-		LM.thrower = unlucky_mob
-		LM.spin = TRUE
-		LM.pass_flags = NO_FLAGS
+		var/list/launch_metadata = STRUCT(launch_metadata)
+		launch_metadata[PROP(launch_metadata, target)] = target_turf
+		launch_metadata[PROP(launch_metadata, range)] = get_dist(AM.loc, target_turf)
+		launch_metadata[PROP(launch_metadata, speed)] = SPEED_FAST
+		launch_metadata[PROP(launch_metadata, thrower)] = unlucky_mob
+		launch_metadata[PROP(launch_metadata, spin)] = TRUE
+		launch_metadata[PROP(launch_metadata, pass_flags)] = NO_FLAGS
 		to_chat(unlucky_mob, SPAN_WARNING("The ocean currents sweep you off your feet and throw you away!"))
-		unlucky_mob.launch_towards(LM)
+		unlucky_mob.launch_towards(launch_metadata)
 		return
 
 	if(world.time % 5)

code/modules/cm_preds/smartdisc.dm

@@ -20,7 +20,7 @@
 	force = 15
 	throwforce = 25
 
-/obj/item/explosive/grenade/spawnergrenade/smartdisc/launch_towards(datum/launch_metadata/LM)
+/obj/item/explosive/grenade/spawnergrenade/smartdisc/launch_towards(list/launch_metadata)
 	..()
 	var/mob/user = usr
 	if(!active && isyautja(user) && (icon_state == initial(icon_state)))

code/modules/mob/living/carbon/human/human_defense.dm

@@ -265,96 +265,98 @@ Contains most of the procs that are called when a mob is attacked by something
 	return TRUE
 
 //this proc handles being hit by a thrown atom
-/mob/living/carbon/human/hitby(atom/movable/AM)
-	if (!isobj(AM))
+/mob/living/carbon/human/hitby(atom/movable/thrown_atom)
+	if (!isobj(thrown_atom))
 		return
 
-	var/obj/O = AM
-	var/datum/launch_metadata/LM = O.launch_metadata
+	var/obj/thrown_object = thrown_atom
+	var/list/launch_metadata = thrown_object.launch_metadata
 
 	//empty active hand and we're in throw mode
-	var/can_catch = (!(O.flags_atom & ITEM_UNCATCHABLE) || isyautja(src))
+	var/can_catch = (!(thrown_object.flags_atom & ITEM_UNCATCHABLE) || isyautja(src))
 	if (throw_mode && can_catch && !get_active_hand() && cur_speed <= SPEED_VERY_FAST && \
-		!is_mob_incapacitated() && isturf(O.loc) && put_in_active_hand(O)
+		!is_mob_incapacitated() && isturf(thrown_object.loc) && put_in_active_hand(thrown_object)
 	)
-		visible_message(SPAN_WARNING("[src] catches [O]!"), null, null, 5)
+		visible_message(SPAN_WARNING("[src] catches [thrown_object]!"), null, null, 5)
 		toggle_throw_mode(THROW_MODE_OFF)
 		return
 
 	var/dtype = BRUTE
-	if (istype(O, /obj/item/weapon))
-		var/obj/item/weapon/W = O
-		dtype = W.damtype
-	var/impact_damage = (1 + O.throwforce*THROWFORCE_COEFF)*O.throwforce*THROW_SPEED_IMPACT_COEFF*O.cur_speed
+	if (istype(thrown_object, /obj/item/weapon))
+		var/obj/item/weapon/thrown_weapon = thrown_object
+		dtype = thrown_weapon.damtype
+	var/impact_damage = (1 + thrown_object.throwforce*THROWFORCE_COEFF)*thrown_object.throwforce*THROW_SPEED_IMPACT_COEFF*thrown_object.cur_speed
 
 	var/zone
-	if (istype(LM.thrower, /mob/living))
-		var/mob/living/L = LM.thrower
-		zone = check_zone(L.zone_selected)
+	var/thrower = launch_metadata[PROP(launch_metadata, thrower)]
+	if (istype(thrower, /mob/living))
+		var/mob/living/living_thrower = thrower
+		zone = check_zone(living_thrower.zone_selected)
 	else
 		zone = rand_zone("chest", 75) //Hits a random part of the body, geared towards the chest
 
 	if (!zone)
-		visible_message(SPAN_NOTICE("\The [O] misses [src] narrowly!"), null, null, 5)
+		visible_message(SPAN_NOTICE("\The [thrown_object] misses [src] narrowly!"), null, null, 5)
 		return
-	O.throwing = FALSE //it hit, so stop moving
+	thrown_object.throwing = FALSE //it hit, so stop moving
 
-	if ((LM.thrower != src) && check_shields(impact_damage, "[O]"))
+	if ((thrower != src) && check_shields(impact_damage, "[thrown_object]"))
 		return
 
 	var/obj/limb/affecting = get_limb(zone)
 	var/hit_area = affecting.display_name
 
-	src.visible_message(SPAN_DANGER("[src] has been hit in the [hit_area] by [O]."), null, null, 5)
+	src.visible_message(SPAN_DANGER("[src] has been hit in the [hit_area] by [thrown_object]."), null, null, 5)
 
 	var/armor = getarmor(affecting, ARMOR_MELEE)
 
-	var/weapon_sharp = is_sharp(O)
-	var/weapon_edge = has_edge(O)
+	var/weapon_sharp = is_sharp(thrown_object)
+	var/weapon_edge = has_edge(thrown_object)
 
 	var/damage = armor_damage_reduction(GLOB.marine_melee, impact_damage, armor, (weapon_sharp?30:0) + (weapon_edge?10:0))
-	apply_damage(damage, dtype, affecting, sharp=weapon_sharp, edge=weapon_edge, used_weapon=O)
+	apply_damage(damage, dtype, affecting, sharp=weapon_sharp, edge=weapon_edge, used_weapon=thrown_object)
 
 	var/last_damage_source = null
 	var/last_damage_mob = null
 	if (damage > 5)
 		last_damage_source = initial(AM.name)
 		animation_flash_color(src)
-		var/obj/item/I = O
-		if(istype(I) && I.sharp) //Hilarious is_sharp only returns true if it's sharp AND edged, while a bunch of things don't have edge to limit embeds.
+		var/obj/item/thrown_item = thrown_object
+		if(istype(thrown_item) && thrown_item.sharp) //Hilarious is_sharp only returns true if it's sharp AND edged, while a bunch of things don't have edge to limit embeds.
 			playsound(loc, 'sound/effects/spike_hit.ogg', 20, TRUE, 5, falloff = 2)
 		else
 			playsound(loc, 'sound/effects/thud.ogg', 25, TRUE, 5, falloff = 2)
 
-	if (ismob(LM.thrower))
-		var/mob/M = LM.thrower
-		var/client/assailant = M.client
+	if (ismob(thrower))
+		var/mob/mob_thrower = thrower
+		var/client/assailant = mob_thrower.client
 		if (damage > 5)
-			last_damage_mob = M
-			M.track_hit(initial(O.name))
-			if (M.faction == faction)
-				M.track_friendly_fire(initial(O.name))
+			last_damage_mob = mob_thrower
+			mob_thrower.track_hit(initial(thrown_object.name))
+			if (mob_thrower.faction == faction)
+				mob_thrower.track_friendly_fire(initial(thrown_object.name))
 		if (assailant)
-			src.attack_log += text("\[[time_stamp()]\] <font color='orange'>Has been hit with \a [O], thrown by [key_name(M)]</font>")
-			M.attack_log += text("\[[time_stamp()]\] <font color='red'>Hit [key_name(src)] with a thrown [O]</font>")
+			src.attack_log += text("\[[time_stamp()]\] <font color='orange'>Has been hit with \a [thrown_object], thrown by [key_name(mob_thrower)]</font>")
+			mob_thrower.attack_log += text("\[[time_stamp()]\] <font color='red'>Hit [key_name(src)] with a thrown [thrown_object]</font>")
 			if(!istype(src,/mob/living/simple_animal/mouse))
-				msg_admin_attack("[key_name(src)] was hit by \a [O], thrown by [key_name(M)] in [get_area(src)] ([src.loc.x],[src.loc.y],[src.loc.z]).", src.loc.x, src.loc.y, src.loc.z)
+				msg_admin_attack("[key_name(src)] was hit by \a [thrown_object], thrown by [key_name(mob_thrower)] in [get_area(src)] ([src.loc.x],[src.loc.y],[src.loc.z]).", src.loc.x, src.loc.y, src.loc.z)
 
-	if(last_damage_source)
+	if (last_damage_source)
 		last_damage_data = create_cause_data(last_damage_source, last_damage_mob)
 
 	//thrown weapon embedded object code.
-	if (dtype == BRUTE && istype(O,/obj/item))
-		var/obj/item/I = O
-		var/sharp = is_sharp(I)
+	if (dtype == BRUTE && istype(thrown_object, /obj/item))
+		var/obj/item/thrown_item = thrown_object
+		var/sharp = is_sharp(thrown_item)
+		var/weight_class = thrown_item.w_class
 		//blunt objects should really not be embedding in things unless a huge amount of force is involved
-		var/embed_chance = sharp? damage/I.w_class : damage/(I.w_class*3)
-		var/embed_threshold = sharp? 5*I.w_class : 15*I.w_class
+		var/embed_chance = sharp ? damage/weight_class : damage/(weight_class*3)
+		var/embed_threshold = sharp ? 5*weight_class : 15*weight_class
 
 		//Sharp objects will always embed if they do enough damage.
 		//Thrown sharp objects have some momentum already and have a small chance to embed even if the damage is below the threshold
-		if (!isyautja(src) && ((sharp && prob(damage/(10*I.w_class)*100)) || (damage > embed_threshold && prob(embed_chance))))
-			affecting.embed(I)
+		if (!isyautja(src) && ((sharp && prob(damage/(10*weight_class)*100)) || (damage > embed_threshold && prob(embed_chance))))
+			affecting.embed(thrown_item)
 
 /mob/living/carbon/human/proc/get_id_faction_group()
 	var/obj/item/card/id/C = wear_id

code/modules/mob/living/carbon/xenomorph/Facehuggers.dm

@@ -209,7 +209,7 @@
 		return TRUE
 	return FALSE
 
-/obj/item/clothing/mask/facehugger/launch_towards(datum/launch_metadata/LM)
+/obj/item/clothing/mask/facehugger/launch_towards(list/launch_metadata)
 	if(stat == CONSCIOUS)
 		icon_state = "[initial(icon_state)]_thrown"
 	..()