--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/windows/classes/sun/nio/ch/PollArrayWrapper.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2001-2002 Sun Microsystems, Inc. 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. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ */
+
+package sun.nio.ch;
+
+/**
+ * Manipulates a native array of structs corresponding to (fd, events) pairs.
+ *
+ * typedef struct pollfd {
+ * SOCKET fd; // 4 bytes
+ * short events; // 2 bytes
+ * } pollfd_t;
+ *
+ * @author Konstantin Kladko
+ * @author Mike McCloskey
+ */
+
+class PollArrayWrapper {
+
+ private AllocatedNativeObject pollArray; // The fd array
+
+ long pollArrayAddress; // pollArrayAddress
+
+ private static final short FD_OFFSET = 0; // fd offset in pollfd
+ private static final short EVENT_OFFSET = 4; // events offset in pollfd
+
+ static short SIZE_POLLFD = 8; // sizeof pollfd struct
+
+ // events masks
+ static final short POLLIN = AbstractPollArrayWrapper.POLLIN;
+ static final short POLLOUT = AbstractPollArrayWrapper.POLLOUT;
+ static final short POLLERR = AbstractPollArrayWrapper.POLLERR;
+ static final short POLLHUP = AbstractPollArrayWrapper.POLLHUP;
+ static final short POLLNVAL = AbstractPollArrayWrapper.POLLNVAL;
+ static final short POLLREMOVE = AbstractPollArrayWrapper.POLLREMOVE;
+ static final short POLLCONN = 0x0002;
+
+ private int size; // Size of the pollArray
+
+ PollArrayWrapper(int newSize) {
+ int allocationSize = newSize * SIZE_POLLFD;
+ pollArray = new AllocatedNativeObject(allocationSize, true);
+ pollArrayAddress = pollArray.address();
+ this.size = newSize;
+ }
+
+ // Prepare another pollfd struct for use.
+ void addEntry(int index, SelectionKeyImpl ski) {
+ putDescriptor(index, ski.channel.getFDVal());
+ }
+
+ // Writes the pollfd entry from the source wrapper at the source index
+ // over the entry in the target wrapper at the target index.
+ void replaceEntry(PollArrayWrapper source, int sindex,
+ PollArrayWrapper target, int tindex) {
+ target.putDescriptor(tindex, source.getDescriptor(sindex));
+ target.putEventOps(tindex, source.getEventOps(sindex));
+ }
+
+ // Grows the pollfd array to new size
+ void grow(int newSize) {
+ PollArrayWrapper temp = new PollArrayWrapper(newSize);
+ for (int i = 0; i < size; i++)
+ replaceEntry(this, i, temp, i);
+ pollArray.free();
+ pollArray = temp.pollArray;
+ this.size = temp.size;
+ pollArrayAddress = pollArray.address();
+ }
+
+ void free() {
+ pollArray.free();
+ }
+
+ // Access methods for fd structures
+ void putDescriptor(int i, int fd) {
+ pollArray.putInt(SIZE_POLLFD * i + FD_OFFSET, fd);
+ }
+
+ void putEventOps(int i, int event) {
+ pollArray.putShort(SIZE_POLLFD * i + EVENT_OFFSET, (short)event);
+ }
+
+ int getEventOps(int i) {
+ return pollArray.getShort(SIZE_POLLFD * i + EVENT_OFFSET);
+ }
+
+ int getDescriptor(int i) {
+ return pollArray.getInt(SIZE_POLLFD * i + FD_OFFSET);
+ }
+
+ // Adds Windows wakeup socket at a given index.
+ void addWakeupSocket(int fdVal, int index) {
+ putDescriptor(index, fdVal);
+ putEventOps(index, POLLIN);
+ }
+}