| /* |
| * Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.nio.ch; |
| |
| import java.lang.invoke.ConstantBootstraps; |
| import java.lang.invoke.MethodHandles; |
| import java.lang.invoke.VarHandle; |
| import java.nio.channels.CancelledKeyException; |
| import java.nio.channels.SelectableChannel; |
| import java.nio.channels.SelectionKey; |
| import java.nio.channels.Selector; |
| import java.nio.channels.spi.AbstractSelectionKey; |
| |
| |
| /** |
| * An implementation of SelectionKey. |
| */ |
| |
| public final class SelectionKeyImpl |
| extends AbstractSelectionKey |
| { |
| private static final VarHandle INTERESTOPS = |
| ConstantBootstraps.fieldVarHandle( |
| MethodHandles.lookup(), |
| "interestOps", |
| VarHandle.class, |
| SelectionKeyImpl.class, int.class); |
| |
| private final SelChImpl channel; |
| private final SelectorImpl selector; |
| |
| private volatile int interestOps; |
| private volatile int readyOps; |
| |
| // registered events in kernel, used by some Selector implementations |
| private int registeredEvents; |
| |
| // index of key in pollfd array, used by some Selector implementations |
| private int index; |
| |
| SelectionKeyImpl(SelChImpl ch, SelectorImpl sel) { |
| channel = ch; |
| selector = sel; |
| } |
| |
| private void ensureValid() { |
| if (!isValid()) |
| throw new CancelledKeyException(); |
| } |
| |
| int getFDVal() { |
| return channel.getFDVal(); |
| } |
| |
| @Override |
| public SelectableChannel channel() { |
| return (SelectableChannel)channel; |
| } |
| |
| @Override |
| public Selector selector() { |
| return selector; |
| } |
| |
| @Override |
| public int interestOps() { |
| ensureValid(); |
| return interestOps; |
| } |
| |
| @Override |
| public SelectionKey interestOps(int ops) { |
| ensureValid(); |
| if ((ops & ~channel().validOps()) != 0) |
| throw new IllegalArgumentException(); |
| int oldOps = (int) INTERESTOPS.getAndSet(this, ops); |
| if (ops != oldOps) { |
| selector.setEventOps(this); |
| } |
| return this; |
| } |
| |
| @Override |
| public int interestOpsOr(int ops) { |
| ensureValid(); |
| if ((ops & ~channel().validOps()) != 0) |
| throw new IllegalArgumentException(); |
| int oldVal = (int) INTERESTOPS.getAndBitwiseOr(this, ops); |
| if (oldVal != (oldVal | ops)) { |
| selector.setEventOps(this); |
| } |
| return oldVal; |
| } |
| |
| @Override |
| public int interestOpsAnd(int ops) { |
| ensureValid(); |
| int oldVal = (int) INTERESTOPS.getAndBitwiseAnd(this, ops); |
| if (oldVal != (oldVal & ops)) { |
| selector.setEventOps(this); |
| } |
| return oldVal; |
| } |
| |
| @Override |
| public int readyOps() { |
| ensureValid(); |
| return readyOps; |
| } |
| |
| // The nio versions of these operations do not care if a key |
| // has been invalidated. They are for internal use by nio code. |
| |
| public void nioReadyOps(int ops) { |
| readyOps = ops; |
| } |
| |
| public int nioReadyOps() { |
| return readyOps; |
| } |
| |
| public SelectionKey nioInterestOps(int ops) { |
| if ((ops & ~channel().validOps()) != 0) |
| throw new IllegalArgumentException(); |
| interestOps = ops; |
| selector.setEventOps(this); |
| return this; |
| } |
| |
| public int nioInterestOps() { |
| return interestOps; |
| } |
| |
| int translateInterestOps() { |
| return channel.translateInterestOps(interestOps); |
| } |
| |
| boolean translateAndSetReadyOps(int ops) { |
| return channel.translateAndSetReadyOps(ops, this); |
| } |
| |
| boolean translateAndUpdateReadyOps(int ops) { |
| return channel.translateAndUpdateReadyOps(ops, this); |
| } |
| |
| void registeredEvents(int events) { |
| // assert Thread.holdsLock(selector); |
| this.registeredEvents = events; |
| } |
| |
| int registeredEvents() { |
| // assert Thread.holdsLock(selector); |
| return registeredEvents; |
| } |
| |
| int getIndex() { |
| return index; |
| } |
| |
| void setIndex(int i) { |
| index = i; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("channel=") |
| .append(channel) |
| .append(", selector=") |
| .append(selector); |
| if (isValid()) { |
| sb.append(", interestOps=") |
| .append(interestOps) |
| .append(", readyOps=") |
| .append(readyOps); |
| } else { |
| sb.append(", invalid"); |
| } |
| return sb.toString(); |
| } |
| |
| // used by Selector implementations to record when the key was selected |
| int lastPolled; |
| } |