fix tests

Author: madsodgaard

Sources/JExtractSwiftLib/JNI/JNISwift2JavaGenerator+JavaTranslation.swift

@@ -12,8 +12,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-import Darwin
-
 import JavaTypes
 import SwiftJavaConfigurationShared
 

SwiftKitCore/src/test/java/org/swift/swiftkit/AutoArenaTest.java

@@ -58,6 +58,11 @@ public FakeSwiftInstance(SwiftArena arena) {
             return () -> {};
         }
 
+        @Override
+        public long $typeMetadataAddress() {
+            return 0;
+        }
+
         @Override
         public long $memoryAddress() {
             return 0;

SwiftKitFFM/src/main/java/org/swift/swiftkit/ffm/FFMSwiftInstance.java

@@ -18,10 +18,15 @@
 import org.swift.swiftkit.core.SwiftInstanceCleanup;
 
 import java.lang.foreign.MemorySegment;
+import java.util.concurrent.atomic.AtomicBoolean;
 
 public abstract class FFMSwiftInstance implements SwiftInstance {
     private final MemorySegment memorySegment;
 
+    // TODO: make this a flagset integer and/or use a field updater
+    /** Used to track additional state of the underlying object, e.g. if it was explicitly destroyed. */
+    private final AtomicBoolean $state$destroyed = new AtomicBoolean(false);
+
     /**
      * The designated constructor of any imported Swift types.
      *
@@ -52,6 +57,16 @@ protected FFMSwiftInstance(MemorySegment segment, AllocatingSwiftArena arena) {
      */
     public abstract SwiftAnyType $swiftType();
 
+    /**
+     * Exposes a boolean value which can be used to indicate if the object was destroyed.
+     * <p/>
+     * This is exposing the object, rather than performing the action because we don't want to accidentally
+     * form a strong reference to the {@code SwiftInstance} which could prevent the cleanup from running,
+     * if using an GC managed instance (e.g. using an {@code AutoSwiftMemorySession}.
+     */
+    public final AtomicBoolean $statusDestroyedFlag() {
+        return this.$state$destroyed;
+    }
 
     @Override
     public SwiftInstanceCleanup $createCleanup() {
@@ -65,7 +80,6 @@ protected FFMSwiftInstance(MemorySegment segment, AllocatingSwiftArena arena) {
         );
     }
 
-
     /**
      * Returns `true` if this swift instance is a reference type, i.e. a `class` or (`distributed`) `actor`.
      *