0N/A/*
2362N/A * Copyright (c) 2001, 2002, Oracle and/or its affiliates. All rights reserved.
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2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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0N/A */
0N/A
0N/A/*
0N/A */
0N/A
0N/Apackage sun.nio.ch;
0N/A
0N/A/**
0N/A * Manipulates a native array of structs corresponding to (fd, events) pairs.
0N/A *
0N/A * typedef struct pollfd {
0N/A * SOCKET fd; // 4 bytes
0N/A * short events; // 2 bytes
0N/A * } pollfd_t;
0N/A *
0N/A * @author Konstantin Kladko
0N/A * @author Mike McCloskey
0N/A */
0N/A
0N/Aclass PollArrayWrapper {
0N/A
0N/A private AllocatedNativeObject pollArray; // The fd array
0N/A
0N/A long pollArrayAddress; // pollArrayAddress
0N/A
0N/A private static final short FD_OFFSET = 0; // fd offset in pollfd
0N/A private static final short EVENT_OFFSET = 4; // events offset in pollfd
0N/A
0N/A static short SIZE_POLLFD = 8; // sizeof pollfd struct
0N/A
0N/A // events masks
0N/A static final short POLLIN = AbstractPollArrayWrapper.POLLIN;
0N/A static final short POLLOUT = AbstractPollArrayWrapper.POLLOUT;
0N/A static final short POLLERR = AbstractPollArrayWrapper.POLLERR;
0N/A static final short POLLHUP = AbstractPollArrayWrapper.POLLHUP;
0N/A static final short POLLNVAL = AbstractPollArrayWrapper.POLLNVAL;
0N/A static final short POLLREMOVE = AbstractPollArrayWrapper.POLLREMOVE;
0N/A static final short POLLCONN = 0x0002;
0N/A
0N/A private int size; // Size of the pollArray
0N/A
0N/A PollArrayWrapper(int newSize) {
0N/A int allocationSize = newSize * SIZE_POLLFD;
0N/A pollArray = new AllocatedNativeObject(allocationSize, true);
0N/A pollArrayAddress = pollArray.address();
0N/A this.size = newSize;
0N/A }
0N/A
0N/A // Prepare another pollfd struct for use.
0N/A void addEntry(int index, SelectionKeyImpl ski) {
0N/A putDescriptor(index, ski.channel.getFDVal());
0N/A }
0N/A
0N/A // Writes the pollfd entry from the source wrapper at the source index
0N/A // over the entry in the target wrapper at the target index.
0N/A void replaceEntry(PollArrayWrapper source, int sindex,
0N/A PollArrayWrapper target, int tindex) {
0N/A target.putDescriptor(tindex, source.getDescriptor(sindex));
0N/A target.putEventOps(tindex, source.getEventOps(sindex));
0N/A }
0N/A
0N/A // Grows the pollfd array to new size
0N/A void grow(int newSize) {
0N/A PollArrayWrapper temp = new PollArrayWrapper(newSize);
0N/A for (int i = 0; i < size; i++)
0N/A replaceEntry(this, i, temp, i);
0N/A pollArray.free();
0N/A pollArray = temp.pollArray;
0N/A this.size = temp.size;
0N/A pollArrayAddress = pollArray.address();
0N/A }
0N/A
0N/A void free() {
0N/A pollArray.free();
0N/A }
0N/A
0N/A // Access methods for fd structures
0N/A void putDescriptor(int i, int fd) {
0N/A pollArray.putInt(SIZE_POLLFD * i + FD_OFFSET, fd);
0N/A }
0N/A
0N/A void putEventOps(int i, int event) {
0N/A pollArray.putShort(SIZE_POLLFD * i + EVENT_OFFSET, (short)event);
0N/A }
0N/A
0N/A int getEventOps(int i) {
0N/A return pollArray.getShort(SIZE_POLLFD * i + EVENT_OFFSET);
0N/A }
0N/A
0N/A int getDescriptor(int i) {
0N/A return pollArray.getInt(SIZE_POLLFD * i + FD_OFFSET);
0N/A }
0N/A
0N/A // Adds Windows wakeup socket at a given index.
0N/A void addWakeupSocket(int fdVal, int index) {
0N/A putDescriptor(index, fdVal);
0N/A putEventOps(index, POLLIN);
0N/A }
0N/A}