| /* |
| * Copyright (c) 2001, 2012, 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. |
| * |
| * @author Mike McCloskey |
| * @since 1.4 |
| */ |
| |
| public abstract class AbstractPollArrayWrapper { |
| |
| // Miscellaneous constants |
| static final short SIZE_POLLFD = 8; |
| static final short FD_OFFSET = 0; |
| static final short EVENT_OFFSET = 4; |
| static final short REVENT_OFFSET = 6; |
| |
| // The poll fd array |
| protected AllocatedNativeObject pollArray; |
| |
| // Number of valid entries in the pollArray |
| protected int totalChannels = 0; |
| |
| // Base address of the native pollArray |
| protected long pollArrayAddress; |
| |
| // Access methods for fd structures |
| int getEventOps(int i) { |
| int offset = SIZE_POLLFD * i + EVENT_OFFSET; |
| return pollArray.getShort(offset); |
| } |
| |
| int getReventOps(int i) { |
| int offset = SIZE_POLLFD * i + REVENT_OFFSET; |
| return pollArray.getShort(offset); |
| } |
| |
| int getDescriptor(int i) { |
| int offset = SIZE_POLLFD * i + FD_OFFSET; |
| return pollArray.getInt(offset); |
| } |
| |
| void putEventOps(int i, int event) { |
| int offset = SIZE_POLLFD * i + EVENT_OFFSET; |
| pollArray.putShort(offset, (short)event); |
| } |
| |
| void putReventOps(int i, int revent) { |
| int offset = SIZE_POLLFD * i + REVENT_OFFSET; |
| pollArray.putShort(offset, (short)revent); |
| } |
| |
| void putDescriptor(int i, int fd) { |
| int offset = SIZE_POLLFD * i + FD_OFFSET; |
| pollArray.putInt(offset, fd); |
| } |
| |
| } |