| /* |
| * Copyright (c) 2001, 2016, 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.io.IOException; |
| import java.nio.channels.*; |
| import java.nio.channels.spi.*; |
| import java.util.*; |
| |
| |
| /** |
| * An implementation of Selector for Solaris. |
| */ |
| |
| class PollSelectorImpl |
| extends AbstractPollSelectorImpl |
| { |
| |
| // File descriptors used for interrupt |
| private int fd0; |
| private int fd1; |
| |
| // Lock for interrupt triggering and clearing |
| private Object interruptLock = new Object(); |
| private boolean interruptTriggered = false; |
| |
| /** |
| * Package private constructor called by factory method in |
| * the abstract superclass Selector. |
| */ |
| PollSelectorImpl(SelectorProvider sp) { |
| super(sp, 1, 1); |
| long pipeFds = IOUtil.makePipe(false); |
| fd0 = (int) (pipeFds >>> 32); |
| fd1 = (int) pipeFds; |
| try { |
| pollWrapper = new PollArrayWrapper(INIT_CAP); |
| pollWrapper.initInterrupt(fd0, fd1); |
| channelArray = new SelectionKeyImpl[INIT_CAP]; |
| } catch (Throwable t) { |
| try { |
| FileDispatcherImpl.closeIntFD(fd0); |
| } catch (IOException ioe0) { |
| t.addSuppressed(ioe0); |
| } |
| try { |
| FileDispatcherImpl.closeIntFD(fd1); |
| } catch (IOException ioe1) { |
| t.addSuppressed(ioe1); |
| } |
| throw t; |
| } |
| } |
| |
| protected int doSelect(long timeout) |
| throws IOException |
| { |
| if (channelArray == null) |
| throw new ClosedSelectorException(); |
| processDeregisterQueue(); |
| try { |
| begin(); |
| pollWrapper.poll(totalChannels, 0, timeout); |
| } finally { |
| end(); |
| } |
| processDeregisterQueue(); |
| int numKeysUpdated = updateSelectedKeys(); |
| if (pollWrapper.getReventOps(0) != 0) { |
| // Clear the wakeup pipe |
| pollWrapper.putReventOps(0, 0); |
| synchronized (interruptLock) { |
| IOUtil.drain(fd0); |
| interruptTriggered = false; |
| } |
| } |
| return numKeysUpdated; |
| } |
| |
| protected void implCloseInterrupt() throws IOException { |
| // prevent further wakeup |
| synchronized (interruptLock) { |
| interruptTriggered = true; |
| } |
| FileDispatcherImpl.closeIntFD(fd0); |
| FileDispatcherImpl.closeIntFD(fd1); |
| fd0 = -1; |
| fd1 = -1; |
| pollWrapper.release(0); |
| } |
| |
| public Selector wakeup() { |
| synchronized (interruptLock) { |
| if (!interruptTriggered) { |
| pollWrapper.interrupt(); |
| interruptTriggered = true; |
| } |
| } |
| return this; |
| } |
| |
| } |