26 package sun.nio.ch;
  27 
  28 import java.io.FileDescriptor;
  29 import java.io.IOException;
  30 import java.io.UncheckedIOException;
  31 import java.lang.ref.Cleaner.Cleanable;
  32 import java.nio.ByteBuffer;
  33 import java.nio.MappedByteBuffer;
  34 import java.nio.channels.AsynchronousCloseException;
  35 import java.nio.channels.ClosedByInterruptException;
  36 import java.nio.channels.ClosedChannelException;
  37 import java.nio.channels.FileChannel;
  38 import java.nio.channels.FileLock;
  39 import java.nio.channels.FileLockInterruptionException;
  40 import java.nio.channels.NonReadableChannelException;
  41 import java.nio.channels.NonWritableChannelException;
  42 import java.nio.channels.ReadableByteChannel;
  43 import java.nio.channels.SelectableChannel;
  44 import java.nio.channels.WritableByteChannel;
  45 
  46 import jdk.internal.misc.JavaIOFileDescriptorAccess;
  47 import jdk.internal.misc.JavaNioAccess;
  48 import jdk.internal.misc.SharedSecrets;
  49 import jdk.internal.ref.Cleaner;
  50 import jdk.internal.ref.CleanerFactory;
  51 
  52 public class FileChannelImpl
  53     extends FileChannel
  54 {
  55     // Memory allocation size for mapping buffers
  56     private static final long allocationGranularity;
  57 
  58     // Access to FileDescriptor internals
  59     private static final JavaIOFileDescriptorAccess fdAccess =
  60         SharedSecrets.getJavaIOFileDescriptorAccess();
  61 
  62     // Used to make native read and write calls
  63     private final FileDispatcher nd;
  64 
  65     // File descriptor
  66     private final FileDescriptor fd;
  67 
  68     // File access mode (immutable)

  26 package sun.nio.ch;
  27 
  28 import java.io.FileDescriptor;
  29 import java.io.IOException;
  30 import java.io.UncheckedIOException;
  31 import java.lang.ref.Cleaner.Cleanable;
  32 import java.nio.ByteBuffer;
  33 import java.nio.MappedByteBuffer;
  34 import java.nio.channels.AsynchronousCloseException;
  35 import java.nio.channels.ClosedByInterruptException;
  36 import java.nio.channels.ClosedChannelException;
  37 import java.nio.channels.FileChannel;
  38 import java.nio.channels.FileLock;
  39 import java.nio.channels.FileLockInterruptionException;
  40 import java.nio.channels.NonReadableChannelException;
  41 import java.nio.channels.NonWritableChannelException;
  42 import java.nio.channels.ReadableByteChannel;
  43 import java.nio.channels.SelectableChannel;
  44 import java.nio.channels.WritableByteChannel;
  45 
  46 import jdk.internal.access.JavaIOFileDescriptorAccess;
  47 import jdk.internal.access.JavaNioAccess;
  48 import jdk.internal.access.SharedSecrets;
  49 import jdk.internal.ref.Cleaner;
  50 import jdk.internal.ref.CleanerFactory;
  51 
  52 public class FileChannelImpl
  53     extends FileChannel
  54 {
  55     // Memory allocation size for mapping buffers
  56     private static final long allocationGranularity;
  57 
  58     // Access to FileDescriptor internals
  59     private static final JavaIOFileDescriptorAccess fdAccess =
  60         SharedSecrets.getJavaIOFileDescriptorAccess();
  61 
  62     // Used to make native read and write calls
  63     private final FileDispatcher nd;
  64 
  65     // File descriptor
  66     private final FileDescriptor fd;
  67 
  68     // File access mode (immutable)