src/java.base/share/classes/jdk/internal/misc/Unsafe.java

*** 24,34 ****
--- 24,36 ----
   */
  
  package jdk.internal.misc;
  
  import jdk.internal.HotSpotIntrinsicCandidate;
+ import jdk.internal.ref.Cleaner;
  import jdk.internal.vm.annotation.ForceInline;
+ import sun.nio.ch.DirectBuffer;
  
  import java.lang.reflect.Field;
  import java.security.ProtectionDomain;
  
  
*** 3716,3725 ****
--- 3718,3750 ----
      private native int getLoadAverage0(double[] loadavg, int nelems);
      private native boolean unalignedAccess0();
      private native boolean isBigEndian0();
  
  
+     /**
+      * Invokes the given direct byte buffer's cleaner, if any.
+      *
+      * @param directBuffer a direct byte buffer
+      * @throws NullPointerException     if {@code directBuffer} is null
+      * @throws IllegalArgumentException if {@code directBuffer} is non-direct,
+      *                                  or is a {@link java.nio.Buffer#slice slice}, or is a
+      *                                  {@link java.nio.Buffer#duplicate duplicate}
+      */
+     public void invokeCleaner(java.nio.ByteBuffer directBuffer) {
+         if (!directBuffer.isDirect())
+             throw new IllegalArgumentException("buffer is non-direct");
+ 
+         DirectBuffer db = (DirectBuffer) directBuffer;
+         if (db.attachment() != null)
+             throw new IllegalArgumentException("duplicate or slice");
+ 
+         Cleaner cleaner = db.cleaner();
+         if (cleaner != null) {
+             cleaner.clean();
+         }
+     }
+ 
      // The following deprecated methods are used by JSR 166.
  
      @Deprecated(since="12", forRemoval=true)
      public final Object getObject(Object o, long offset) {
          return getReference(o, offset);