11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.nio.ch;
  27 
  28 import java.io.FileDescriptor;
  29 import java.io.IOException;
  30 import java.security.PrivilegedAction;
  31 import sun.misc.SharedSecrets;
  32 import sun.misc.JavaIOFileDescriptorAccess;
  33 
  34 class FileDispatcherImpl extends FileDispatcher {
  35 
  36     private static final JavaIOFileDescriptorAccess fdAccess =
  37         SharedSecrets.getJavaIOFileDescriptorAccess();
  38 
  39     // set to true if fast file transmission (TransmitFile) is enabled
  40     private static final boolean fastFileTransfer;
  41 
  42     FileDispatcherImpl() { }
  43 
  44     @Override
  45     boolean needsPositionLock() {
  46         return true;
  47     }
  48 
  49     int read(FileDescriptor fd, long address, int len)
  50         throws IOException
  51     {
  52         return read0(fd, address, len);

  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.nio.ch;
  27 
  28 import java.io.FileDescriptor;
  29 import java.io.IOException;
  30 import java.security.PrivilegedAction;
  31 import jdk.internal.misc.SharedSecrets;
  32 import jdk.internal.misc.JavaIOFileDescriptorAccess;
  33 
  34 class FileDispatcherImpl extends FileDispatcher {
  35 
  36     private static final JavaIOFileDescriptorAccess fdAccess =
  37         SharedSecrets.getJavaIOFileDescriptorAccess();
  38 
  39     // set to true if fast file transmission (TransmitFile) is enabled
  40     private static final boolean fastFileTransfer;
  41 
  42     FileDispatcherImpl() { }
  43 
  44     @Override
  45     boolean needsPositionLock() {
  46         return true;
  47     }
  48 
  49     int read(FileDescriptor fd, long address, int len)
  50         throws IOException
  51     {
  52         return read0(fd, address, len);