Убрать аллокации из игрового hot path

2026-08-18 17:20:04 +03:00
parent de3b9485c1
commit 88a1ba9b34
3 changed files with 196 additions and 31 deletions
@@ -0,0 +1,58 @@
+package com.projectsacrifice.game;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/** Allocation-free critical-state comparison after a level has been configured. */
+final class AccessibilityStateCache {
+    private List<String> signalIds = Collections.emptyList();
+    private GameLanguage language;
+    private int activeSignals = Integer.MIN_VALUE;
+    private int openDoors = Integer.MIN_VALUE;
+    private int totalDoors = Integer.MIN_VALUE;
+    private boolean playerAlive;
+    private String statusText;
+
+    void configureSignals(List<String> sourceIds) {
+        ArrayList<String> unique = new ArrayList<>();
+        for (String signalId : sourceIds) {
+            if (!unique.contains(signalId)) unique.add(signalId);
+        }
+        signalIds = Collections.unmodifiableList(unique);
+        language = null;
+        activeSignals = Integer.MIN_VALUE;
+        openDoors = Integer.MIN_VALUE;
+        totalDoors = Integer.MIN_VALUE;
+        statusText = null;
+    }
+
+    List<String> signalIds() {
+        return signalIds;
+    }
+
+    boolean update(GameStrings strings, int updatedActiveSignals, int updatedOpenDoors,
+                   int updatedTotalDoors, boolean updatedPlayerAlive) {
+        GameLanguage updatedLanguage = strings.language();
+        if (statusText != null
+                && language == updatedLanguage
+                && activeSignals == updatedActiveSignals
+                && openDoors == updatedOpenDoors
+                && totalDoors == updatedTotalDoors
+                && playerAlive == updatedPlayerAlive) {
+            return false;
+        }
+        language = updatedLanguage;
+        activeSignals = updatedActiveSignals;
+        openDoors = updatedOpenDoors;
+        totalDoors = updatedTotalDoors;
+        playerAlive = updatedPlayerAlive;
+        statusText = AccessibilityStatus.describe(strings, activeSignals, signalIds.size(),
+                openDoors, totalDoors, playerAlive);
+        return true;
+    }
+
+    String statusText() {
+        return statusText;
+    }
+}