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 package sun.nio.ch;
26
27 import java.io.IOException;
28
29 /**
30 * Default PollerProvider for Windows based on wepoll.
31 */
32 class DefaultPollerProvider extends PollerProvider {
33 DefaultPollerProvider() { }
34
35 @Override
36 int defaultReadPollers(Poller.Mode mode) {
37 assert mode == Poller.Mode.SYSTEM_THREADS;
38 int ncpus = Runtime.getRuntime().availableProcessors();
39 return Math.max(Integer.highestOneBit(ncpus / 8), 1);
40 }
41
42 @Override
43 int fdValToIndex(int fdVal, int toIndex) {
44 return (fdVal >> 2) & (toIndex - 1);
45 }
46
47 @Override
48 Poller readPoller(boolean subPoller) throws IOException {
49 assert !subPoller;
50 return new WEPollPoller(true);
51 }
52
53 @Override
54 Poller writePoller(boolean subPoller) throws IOException {
55 assert !subPoller;
56 return new WEPollPoller(false);
57 }
58 }
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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 package sun.nio.ch;
26
27 import java.io.IOException;
28
29 /**
30 * Default PollerProvider for Windows based on wepoll.
31 */
32 class DefaultPollerProvider extends PollerProvider {
33 DefaultPollerProvider(Poller.Mode mode) {
34 if (mode != Poller.Mode.SYSTEM_THREADS) {
35 throw new UnsupportedOperationException();
36 }
37 super(mode);
38 }
39
40 DefaultPollerProvider() {
41 this(Poller.Mode.SYSTEM_THREADS);
42 }
43
44 @Override
45 int defaultReadPollers() {
46 int ncpus = Runtime.getRuntime().availableProcessors();
47 return Math.max(Integer.highestOneBit(ncpus / 8), 1);
48 }
49
50 @Override
51 int fdValToIndex(int fdVal, int toIndex) {
52 return (fdVal >> 2) & (toIndex - 1);
53 }
54
55 @Override
56 Poller readPoller(boolean subPoller) throws IOException {
57 if (subPoller)
58 throw new UnsupportedOperationException();
59 return new WEPollPoller(true);
60 }
61
62 @Override
63 Poller writePoller(boolean subPoller) throws IOException {
64 if (subPoller)
65 throw new UnsupportedOperationException();
66 return new WEPollPoller(false);
67 }
68 }
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