Support non-unique TIMER_CLIENT_TIME timers in SSdpc

code/__defines/MC.dm

@@ -99,7 +99,9 @@ if(Datum.is_processing) {\
 // TIMER_OVERRIDE is impossible to support because we don't track that for DPC queued calls, and adding a third list for that would be a lot of overhead for no real benefit
 // TIMER_STOPPABLE can't work because it uses timer IDs instead of hashes, and DPC queued calls don't have IDs.
 // TIMER_LOOP doesn't work because it needs to be a timer that can re-insert in the list, and a zero-wait looping timer should really be a ticker subsystem instead.
-// Update this define if any of those change.
+// Update these defines if any of those change.
+/// These are the flags forbidden when putting zero-wait timers on SSdpc instead of SStimer.
+#define DPC_FORBID_FLAGS   TIMER_UNIQUE | TIMER_OVERRIDE | TIMER_STOPPABLE | TIMER_LOOP
 /// These are the flags forbidden when putting zero-wait TIMER_UNIQUE timers on SSdpc instead of SStimer.
 #define UDPC_FORBID_FLAGS  TIMER_OVERRIDE | TIMER_STOPPABLE | TIMER_LOOP
 

code/controllers/subsystems/DPC.dm

@@ -1,7 +1,7 @@
 /*
 This is pretty much just an optimization for wait=0 timers. They're relatively common, but generally don't actually need the more
  complex features of SStimer. SSdpc can handle these timers instead (and it's a lot simpler than SStimer is), but it can't handle
- complex timers with flags. This doesn't need to be explicitly used, eligible timers are automatically converted.
+ timers with certain flags (check MC.dm). This doesn't need to be explicitly used, eligible timers are automatically converted.
 */
 
 SUBSYSTEM_DEF(dpc)
@@ -17,7 +17,7 @@ SUBSYSTEM_DEF(dpc)
 	var/unique_avg = 0
 
 /datum/controller/subsystem/dpc/stat_entry()
-	return ..() + " Q: [queued_calls.len], AQ: ~[round(avg)], UQ: [unique_queued_calls.len], AQ: ~[round(unique_avg)]"
+	return ..() + " Q: [queued_calls.len], AQ: ~[round(avg)], UQ: [unique_queued_calls.len], UAQ: ~[round(unique_avg)]"
 
 /datum/controller/subsystem/dpc/fire(resumed = FALSE)
 	var/list/qc = queued_calls

code/controllers/subsystems/timer.dm

@@ -569,7 +569,7 @@ SUBSYSTEM_DEF(timer)
 		PRINT_STACK_TRACE("addtimer called with a callback assigned to a qdeleted object. In the future such timers will not \
 			be supported and may refuse to run or run with a 0 wait")
 
-	if (wait == 0 && !flags)
+	if (wait == 0 && !(flags & DPC_FORBID_FLAGS))
 		SSdpc.queued_calls += callback
 		return