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src/java.base/share/classes/java/io/FileCleanable.java

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rev 51958 : 8211122: Reduce the number of internal classes made accessible to jdk.unsupported
Reviewed-by: alanb, dfuchs, kvn


   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  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 java.io;
  27 
  28 import jdk.internal.misc.JavaIOFileDescriptorAccess;
  29 import jdk.internal.misc.SharedSecrets;
  30 import jdk.internal.ref.CleanerFactory;
  31 import jdk.internal.ref.PhantomCleanable;
  32 
  33 import java.lang.ref.Cleaner;
  34 
  35 /**
  36  * Cleanable for a FileDescriptor when it becomes phantom reachable.
  37  * For regular fds on Unix and regular handles on Windows
  38  * register a cleanup if fd != -1 or handle != -1.
  39  * <p>
  40  * Subclassed from {@code PhantomCleanable} so that {@code clear} can be
  41  * called to disable the cleanup when the handle is closed by any means other
  42  * than calling {@link FileDescriptor#close}.
  43  * Otherwise, it might incorrectly close the handle after it has been reused.
  44  */
  45 final class FileCleanable extends PhantomCleanable<FileDescriptor> {
  46 
  47     // Access to FileDescriptor private fields;
  48     // avoids making fd and handle package private
  49     private static final JavaIOFileDescriptorAccess fdAccess =




   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  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 java.io;
  27 
  28 import jdk.internal.access.JavaIOFileDescriptorAccess;
  29 import jdk.internal.access.SharedSecrets;
  30 import jdk.internal.ref.CleanerFactory;
  31 import jdk.internal.ref.PhantomCleanable;
  32 
  33 import java.lang.ref.Cleaner;
  34 
  35 /**
  36  * Cleanable for a FileDescriptor when it becomes phantom reachable.
  37  * For regular fds on Unix and regular handles on Windows
  38  * register a cleanup if fd != -1 or handle != -1.
  39  * <p>
  40  * Subclassed from {@code PhantomCleanable} so that {@code clear} can be
  41  * called to disable the cleanup when the handle is closed by any means other
  42  * than calling {@link FileDescriptor#close}.
  43  * Otherwise, it might incorrectly close the handle after it has been reused.
  44  */
  45 final class FileCleanable extends PhantomCleanable<FileDescriptor> {
  46 
  47     // Access to FileDescriptor private fields;
  48     // avoids making fd and handle package private
  49     private static final JavaIOFileDescriptorAccess fdAccess =


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