src/java.base/linux/classes/sun/nio/fs/LinuxWatchService.java

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


  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 java.nio.file.*;
  29 import java.security.AccessController;
  30 import java.security.PrivilegedAction;
  31 import java.util.*;
  32 import java.io.IOException;
  33 import sun.misc.Unsafe;
  34 
  35 import static sun.nio.fs.UnixNativeDispatcher.*;
  36 import static sun.nio.fs.UnixConstants.*;
  37 
  38 /**
  39  * Linux implementation of WatchService based on inotify.
  40  *
  41  * In summary a background thread polls inotify plus a socket used for the wakeup
  42  * mechanism. Requests to add or remove a watch, or close the watch service,
  43  * cause the thread to wakeup and process the request. Events are processed
  44  * by the thread which causes it to signal/queue the corresponding watch keys.
  45  */
  46 
  47 class LinuxWatchService
  48     extends AbstractWatchService
  49 {
  50     private static final Unsafe unsafe = Unsafe.getUnsafe();
  51 
  52     // background thread to read change events
  53     private final Poller poller;




  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 java.nio.file.*;
  29 import java.security.AccessController;
  30 import java.security.PrivilegedAction;
  31 import java.util.*;
  32 import java.io.IOException;
  33 import jdk.internal.misc.Unsafe;
  34 
  35 import static sun.nio.fs.UnixNativeDispatcher.*;
  36 import static sun.nio.fs.UnixConstants.*;
  37 
  38 /**
  39  * Linux implementation of WatchService based on inotify.
  40  *
  41  * In summary a background thread polls inotify plus a socket used for the wakeup
  42  * mechanism. Requests to add or remove a watch, or close the watch service,
  43  * cause the thread to wakeup and process the request. Events are processed
  44  * by the thread which causes it to signal/queue the corresponding watch keys.
  45  */
  46 
  47 class LinuxWatchService
  48     extends AbstractWatchService
  49 {
  50     private static final Unsafe unsafe = Unsafe.getUnsafe();
  51 
  52     // background thread to read change events
  53     private final Poller poller;