| /* |
| * Copyright (c) 2001, 2013, 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; |
| |
| |
| /** |
| * Manipulates a native array of pollfd structs on Solaris: |
| * |
| * typedef struct pollfd { |
| * int fd; |
| * short events; |
| * short revents; |
| * } pollfd_t; |
| * |
| * @author Mike McCloskey |
| * @since 1.4 |
| */ |
| |
| public class PollArrayWrapper extends AbstractPollArrayWrapper { |
| |
| // File descriptor to write for interrupt |
| int interruptFD; |
| |
| PollArrayWrapper(int newSize) { |
| newSize = (newSize + 1) * SIZE_POLLFD; |
| pollArray = new AllocatedNativeObject(newSize, false); |
| pollArrayAddress = pollArray.address(); |
| totalChannels = 1; |
| } |
| |
| void initInterrupt(int fd0, int fd1) { |
| interruptFD = fd1; |
| putDescriptor(0, fd0); |
| putEventOps(0, Net.POLLIN); |
| putReventOps(0, 0); |
| } |
| |
| void release(int i) { |
| return; |
| } |
| |
| void free() { |
| pollArray.free(); |
| } |
| |
| /** |
| * Prepare another pollfd struct for use. |
| */ |
| void addEntry(SelChImpl sc) { |
| putDescriptor(totalChannels, IOUtil.fdVal(sc.getFD())); |
| putEventOps(totalChannels, 0); |
| putReventOps(totalChannels, 0); |
| totalChannels++; |
| } |
| |
| /** |
| * Writes the pollfd entry from the source wrapper at the source index |
| * over the entry in the target wrapper at the target index. The source |
| * array remains unchanged unless the source array and the target are |
| * the same array. |
| */ |
| static void replaceEntry(PollArrayWrapper source, int sindex, |
| PollArrayWrapper target, int tindex) { |
| target.putDescriptor(tindex, source.getDescriptor(sindex)); |
| target.putEventOps(tindex, source.getEventOps(sindex)); |
| target.putReventOps(tindex, source.getReventOps(sindex)); |
| } |
| |
| /** |
| * Grows the pollfd array to a size that will accommodate newSize |
| * pollfd entries. This method does no checking of the newSize |
| * to determine if it is in fact bigger than the old size: it |
| * always reallocates an array of the new size. |
| */ |
| void grow(int newSize) { |
| // create new array |
| PollArrayWrapper temp = new PollArrayWrapper(newSize); |
| |
| // Copy over existing entries |
| for (int i=0; i<totalChannels; i++) |
| replaceEntry(this, i, temp, i); |
| |
| // Swap new array into pollArray field |
| pollArray.free(); |
| pollArray = temp.pollArray; |
| pollArrayAddress = pollArray.address(); |
| } |
| |
| int poll(int numfds, int offset, long timeout) { |
| return poll0(pollArrayAddress + (offset * SIZE_POLLFD), |
| numfds, timeout); |
| } |
| |
| public void interrupt() { |
| interrupt(interruptFD); |
| } |
| |
| private native int poll0(long pollAddress, int numfds, long timeout); |
| |
| private static native void interrupt(int fd); |
| |
| static { |
| IOUtil.load(); |
| } |
| } |