src/java.base/share/classes/sun/nio/fs/Cancellable.java

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rev 12972 : 8140606: Update library code to use internal Unsafe
Reviewed-by: duke


   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 sun.nio.fs;
  27 
  28 import sun.misc.ManagedLocalsThread;
  29 import sun.misc.Unsafe;
  30 import java.util.concurrent.ExecutionException;
  31 
  32 /**
  33  * Base implementation of a task (typically native) that polls a memory location
  34  * during execution so that it may be aborted/cancelled before completion. The
  35  * task is executed by invoking the {@link runInterruptibly} method defined
  36  * here and cancelled by invoking Thread.interrupt.
  37  */
  38 
  39 abstract class Cancellable implements Runnable {
  40     private static final Unsafe unsafe = Unsafe.getUnsafe();
  41 
  42     private final long pollingAddress;
  43     private final Object lock = new Object();
  44 
  45     // the following require lock when examining or changing
  46     private boolean completed;
  47     private Throwable exception;
  48 
  49     protected Cancellable() {




   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 sun.nio.fs;
  27 
  28 import sun.misc.ManagedLocalsThread;
  29 import jdk.internal.misc.Unsafe;
  30 import java.util.concurrent.ExecutionException;
  31 
  32 /**
  33  * Base implementation of a task (typically native) that polls a memory location
  34  * during execution so that it may be aborted/cancelled before completion. The
  35  * task is executed by invoking the {@link runInterruptibly} method defined
  36  * here and cancelled by invoking Thread.interrupt.
  37  */
  38 
  39 abstract class Cancellable implements Runnable {
  40     private static final Unsafe unsafe = Unsafe.getUnsafe();
  41 
  42     private final long pollingAddress;
  43     private final Object lock = new Object();
  44 
  45     // the following require lock when examining or changing
  46     private boolean completed;
  47     private Throwable exception;
  48 
  49     protected Cancellable() {