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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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 if (mode != Poller.Mode.SYSTEM_THREADS) {
38 throw new UnsupportedOperationException();
39 }
40 int ncpus = Runtime.getRuntime().availableProcessors();
41 return Math.max(Integer.highestOneBit(ncpus / 8), 1);
42 }
43
44 @Override
45 int fdValToIndex(int fdVal, int toIndex) {
46 return (fdVal >> 2) & (toIndex - 1);
47 }
48
49 @Override
50 Poller readPoller(boolean subPoller) throws IOException {
51 if (subPoller)
52 throw new UnsupportedOperationException();
53 return new WEPollPoller(true);
54 }
55
56 @Override
57 Poller writePoller(boolean subPoller) throws IOException {
58 if (subPoller)
59 throw new UnsupportedOperationException();
60 return new WEPollPoller(false);
61 }
62 }
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