/* * Copyright (c) 1994, 2011, 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 java.io; //import java.io.*;//import java.util.Properties;//import java.util.PropertyPermission;//import java.util.StringTokenizer;//import java.security.AccessController;//import java.security.PrivilegedAction;//import java.security.AllPermission;//import java.nio.channels.Channel;//import java.nio.channels.spi.SelectorProvider;//import sun.nio.ch.Interruptible;//import sun.reflect.Reflection;//import sun.security.util.SecurityConstants;//import sun.reflect.annotation.AnnotationType; /** * The <code>FileDescriptor</code> class is the internal to Inferno's jvm * class representing internal file descriptor. * * Mainly provides in, out and err file descriptors. * * @author  kabbi */public final class FileDescriptor {     public static FileDescriptor in = new FileDescriptor();     public static FileDescriptor out = new FileDescriptor();     public static FileDescriptor err = new FileDescriptor();     static {        in = initSystemFD(in, 0);        out = initSystemFD(out, 1);        err = initSystemFD(err, 2);    }     /** Don't let anyone instantiate this class */    private FileDescriptor() {    }     /**     * Init some FileDescriptor object with system numeric fd number     *     * @param fd FileDescriptor object     * @param number system fd index     */    public final static native FileDescriptor initSystemFD(FileDescriptor fd, int number);     /**     * Check if this file descriptor is valid.     */    public final native boolean valid();     /*     * Flush all the buffers and wait till every operation is completed.     * Means nothing in Inferno, as all the operations are synchronous.     */    public final native void sync(); }