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.ch;
27 
28 import java.io.FileDescriptor;
29 import java.io.IOException;
30 
31 abstract class UnixDispatcher extends NativeDispatcher {
32     private static final boolean SUPPORTS_PENDING_SIGNALS = NativeThread.supportPendingSignals();
33 
34     @Override
35     void close(FileDescriptor fd) throws IOException {
36         close0(fd);
37     }
38 
39     private void signalThreads(long reader, long writer) {
40         if (NativeThread.isNativeThread(reader))
41             NativeThread.signal(reader);
42         if (NativeThread.isNativeThread(writer))

43             NativeThread.signal(writer);

44     }
45 
46     @Override
47     void implPreClose(FileDescriptor fd, long reader, long writer) throws IOException {
48         if (SUPPORTS_PENDING_SIGNALS) {
49             signalThreads(reader, writer);
50         }
51         preClose0(fd);
52         if (!SUPPORTS_PENDING_SIGNALS) {
53             signalThreads(reader, writer);
54         }
55     }
56 
57     private static native void close0(FileDescriptor fd) throws IOException;
58 
59     private static native void preClose0(FileDescriptor fd) throws IOException;
60 
61     static native void init();
62 
63     static {
64         IOUtil.load();
65         init();
66     }
67 }

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.ch;
27 
28 import java.io.FileDescriptor;
29 import java.io.IOException;
30 
31 abstract class UnixDispatcher extends NativeDispatcher {
32     private static final boolean SUPPORTS_PENDING_SIGNALS = NativeThread.supportPendingSignals();
33 
34     @Override
35     void close(FileDescriptor fd) throws IOException {
36         close0(fd);
37     }
38 
39     private void signalThreads(Thread reader, Thread writer) {
40         if (reader != null) {
41             NativeThread.signal(reader);
42         }
43         if (writer != null) {
44             NativeThread.signal(writer);
45         }
46     }
47 
48     @Override
49     void implPreClose(FileDescriptor fd, Thread reader, Thread writer) throws IOException {
50         if (SUPPORTS_PENDING_SIGNALS) {
51             signalThreads(reader, writer);
52         }
53         preClose0(fd);
54         if (!SUPPORTS_PENDING_SIGNALS) {
55             signalThreads(reader, writer);
56         }
57     }
58 
59     private static native void close0(FileDescriptor fd) throws IOException;
60 
61     private static native void preClose0(FileDescriptor fd) throws IOException;
62 
63     static native void init();
64 
65     static {
66         IOUtil.load();
67         init();
68     }
69 }