test/jdk/java/foreign/TestByteBuffer.java

M TestByteBuffer.java

*** 76,86 ****
  import jdk.internal.foreign.MemoryAddressImpl;
  import jdk.internal.foreign.NativeMemorySegmentImpl;
  import org.testng.SkipException;
  import org.testng.annotations.*;
  import sun.nio.ch.DirectBuffer;
! 
  import static org.testng.Assert.*;
  
  public class TestByteBuffer {
  
      static Path tempPath;
--- 76,86 ----
  import jdk.internal.foreign.MemoryAddressImpl;
  import jdk.internal.foreign.NativeMemorySegmentImpl;
  import org.testng.SkipException;
  import org.testng.annotations.*;
  import sun.nio.ch.DirectBuffer;
! import static jdk.incubator.foreign.MemorySegment.*;
  import static org.testng.Assert.*;
  
  public class TestByteBuffer {
  
      static Path tempPath;
*** 234,243 ****
--- 234,258 ----
                  checkTuples(base, mbb);
              });
          }
      }
  
+     static final int ALL_ACCESS_MODES = READ | WRITE | CLOSE | ACQUIRE | HANDOFF;
+ 
+     @Test
+     public void testDefaultAccessModesMappedSegment() throws Throwable {
+         try (MappedMemorySegment segment = MemorySegment.mapFromPath(tempPath, 8, FileChannel.MapMode.READ_WRITE)) {
+             assertTrue(segment.hasAccessModes(ALL_ACCESS_MODES));
+             assertEquals(segment.accessModes(), ALL_ACCESS_MODES);
+         }
+ 
+         try (MappedMemorySegment segment = MemorySegment.mapFromPath(tempPath, 8, FileChannel.MapMode.READ_ONLY)) {
+             assertTrue(segment.hasAccessModes(ALL_ACCESS_MODES & ~WRITE));
+             assertEquals(segment.accessModes(), ALL_ACCESS_MODES& ~WRITE);
+         }
+     }
+ 
      @Test
      public void testMappedSegment() throws Throwable {
          File f = new File("test2.out");
          f.createNewFile();
          f.deleteOnExit();
*** 444,453 ****
--- 459,483 ----
              MemoryAddress.copy(nativeArray.baseAddress(), heapArray.baseAddress(), bytes);
              checker.accept(heapArray.baseAddress());
          }
      }
  
+     @Test
+     public void testDefaultAccessModesOfBuffer() {
+         ByteBuffer rwBuffer = ByteBuffer.wrap(new byte[4]);
+         try (MemorySegment segment = MemorySegment.ofByteBuffer(rwBuffer)) {
+             assertTrue(segment.hasAccessModes(ALL_ACCESS_MODES));
+             assertEquals(segment.accessModes(), ALL_ACCESS_MODES);
+         }
+ 
+         ByteBuffer roBuffer = rwBuffer.asReadOnlyBuffer();
+         try (MemorySegment segment = MemorySegment.ofByteBuffer(roBuffer)) {
+             assertTrue(segment.hasAccessModes(ALL_ACCESS_MODES & ~WRITE));
+             assertEquals(segment.accessModes(), ALL_ACCESS_MODES & ~WRITE);
+         }
+     }
+ 
      @Test(dataProvider="bufferSources")
      public void testBufferToSegment(ByteBuffer bb, Predicate<MemorySegment> segmentChecker) {
          MemorySegment segment = MemorySegment.ofByteBuffer(bb);
          assertEquals(segment.hasAccessModes(MemorySegment.WRITE), !bb.isReadOnly());
          assertTrue(segmentChecker.test(segment));