1 /*
2 * Copyright (c) 2008, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
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 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();
442
443 // offsets of inotify_event
444 private static native int[] eventOffsets();
445
446 private static native int inotifyInit() throws UnixException;
447
448 private static native int inotifyAddWatch(int fd, long pathAddress, int mask)
449 throws UnixException;
450
451 private static native void inotifyRmWatch(int fd, int wd)
452 throws UnixException;
453
454 private static native void configureBlocking(int fd, boolean blocking)
455 throws UnixException;
456
457 private static native void socketpair(int[] sv) throws UnixException;
458
459 private static native int poll(int fd1, int fd2) throws UnixException;
460
461 static {
462 AccessController.doPrivileged(new PrivilegedAction<>() {
463 public Void run() {
464 System.loadLibrary("nio");
465 return null;
466 }});
467 }
468 }
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1 /*
2 * Copyright (c) 2008, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
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 sun.nio.fs;
27
28 import java.nio.file.*;
29 import java.util.*;
30 import java.io.IOException;
31 import jdk.internal.misc.Unsafe;
32
33 import static sun.nio.fs.UnixNativeDispatcher.*;
34 import static sun.nio.fs.UnixConstants.*;
35
36 /**
37 * Linux implementation of WatchService based on inotify.
38 *
39 * In summary a background thread polls inotify plus a socket used for the wakeup
40 * mechanism. Requests to add or remove a watch, or close the watch service,
41 * cause the thread to wakeup and process the request. Events are processed
42 * by the thread which causes it to signal/queue the corresponding watch keys.
43 */
44
45 class LinuxWatchService
46 extends AbstractWatchService
47 {
48 private static final Unsafe unsafe = Unsafe.getUnsafe();
440
441 // offsets of inotify_event
442 private static native int[] eventOffsets();
443
444 private static native int inotifyInit() throws UnixException;
445
446 private static native int inotifyAddWatch(int fd, long pathAddress, int mask)
447 throws UnixException;
448
449 private static native void inotifyRmWatch(int fd, int wd)
450 throws UnixException;
451
452 private static native void configureBlocking(int fd, boolean blocking)
453 throws UnixException;
454
455 private static native void socketpair(int[] sv) throws UnixException;
456
457 private static native int poll(int fd1, int fd2) throws UnixException;
458
459 static {
460 jdk.internal.loader.BootLoader.loadLibrary("nio");
461 }
462 }
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