src/jdk.incubator.foreign/share/classes/jdk/incubator/foreign/MemorySegment.java

*** 193,10 ***
--- 193,36 ---
       */
      static <S extends MemorySegment> Spliterator<S> spliterator(S segment, SequenceLayout layout) {
          return AbstractMemorySegmentImpl.spliterator(segment, layout);
      }
  
+     /**
+      * Fills a value into the given memory segment.
+      * <p>
+      * More specifically, the given value is filled into each address of the
+      * segment. Equivalent to (but likely more efficient than) the following code:
+      *
+      * <blockquote><pre>
+      * byteHandle = MemoryLayout.ofSequence(MemoryLayouts.JAVA_BYTE)
+      *         .varHandle(byte.class, MemoryLayout.PathElement.sequenceElement());
+      * for (long l = 0; l < segment.byteSize(); l++) {
+      *     byteHandle.set(segment.baseAddress(), l, value);
+      * }</pre></blockquote>
+      * <p>
+      * Fill can be useful to initialize or reset the memory of a segment.
+      *
+      * @param segment the segment to fill
+      * @param value the value to fill into the segment
+      * @throws IllegalStateException if the segment is not <em>alive</em>, or if access occurs from a thread other than the
+      * thread owning this segment
+      * @throws UnsupportedOperationException if this segment does not support the {@link #WRITE} access mode
+      * @throws NullPointerException if {@code segment == null}
+      */
+     static void fill(MemorySegment segment, byte value) {
+         AbstractMemorySegmentImpl.fill(segment, value);
+     }
+ 
      /**
       * The thread owning this segment.
       * @return the thread owning this segment.
       */
      Thread ownerThread();