runelite-client: add tick counter

runelite-api/src/main/java/net/runelite/api/Client.java

@@ -447,4 +447,8 @@ public interface Client extends GameEngine
 
 	@VisibleForDevtools
 	void setChangedSkillsCount(int i);
+
+	int getTickCount();
+
+	void setTickCount(int tickCount);
 }

runelite-client/src/main/java/net/runelite/client/callback/Hooks.java

@@ -119,6 +119,9 @@ public class Hooks
 			_deferredEventBus.replay();
 
 			eventBus.post(tick);
+
+			int tick = client.getTickCount();
+			client.setTickCount(tick + 1);
 		}
 
 		clientThread.invoke();

runelite-mixins/src/main/java/net/runelite/mixins/RSClientMixin.java

@@ -105,6 +105,9 @@ public abstract class RSClientMixin implements RSClient
 	@Shadow("clientInstance")
 	private static RSClient client;
 
+	@Inject
+	private static int tickCount;
+
 	@Inject
 	private static boolean interpolatePlayerAnimations;
 
@@ -883,4 +886,16 @@ public abstract class RSClientMixin implements RSClient
 	{
 		eventBus.post(new UsernameChanged());
 	}
+
+	@Override
+	public int getTickCount()
+	{
+		return tickCount;
+	}
+
+	@Override
+	public void setTickCount(int tick)
+	{
+		tickCount = tick;
+	}
 }