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;
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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;
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