134 lines
4.1 KiB
Java
134 lines
4.1 KiB
Java
/*
|
|
* 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;
|
|
|
|
import sun.misc.*;
|
|
|
|
|
|
/**
|
|
* 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);
|
|
|
|
// Android-removed: Code to load native libraries, doesn't make sense on Android.
|
|
/*
|
|
static {
|
|
IOUtil.load();
|
|
}
|
|
*/
|
|
}
|