From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libjava/classpath/java/io/FileDescriptor.java | 140 ++++++++++++++++++++++++++ 1 file changed, 140 insertions(+) create mode 100644 libjava/classpath/java/io/FileDescriptor.java (limited to 'libjava/classpath/java/io/FileDescriptor.java') diff --git a/libjava/classpath/java/io/FileDescriptor.java b/libjava/classpath/java/io/FileDescriptor.java new file mode 100644 index 000000000..ce58a9fb0 --- /dev/null +++ b/libjava/classpath/java/io/FileDescriptor.java @@ -0,0 +1,140 @@ +/* FileDescriptor.java -- Opaque file handle class + Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004 + Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import gnu.java.nio.FileChannelImpl; + +import java.nio.channels.ByteChannel; +import java.nio.channels.FileChannel; + +/** + * This class represents an opaque file handle as a Java class. It should + * be used only to pass to other methods that expect an object of this + * type. No system specific information can be obtained from this object. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + * @date September 24, 1998 + */ +public final class FileDescriptor +{ + /** + * A FileDescriptor representing the system standard input + * stream. This will usually be accessed through the + * System.invariable. + */ + public static final FileDescriptor in + = new FileDescriptor (FileChannelImpl.in); + + /** + * A FileDescriptor representing the system standard output + * stream. This will usually be accessed through the + * System.outvariable. + */ + public static final FileDescriptor out + = new FileDescriptor (FileChannelImpl.out); + + /** + * A FileDescriptor representing the system standard error + * stream. This will usually be accessed through the + * System.errvariable. + */ + public static final FileDescriptor err + = new FileDescriptor (FileChannelImpl.err); + + final ByteChannel channel; + + /** + * This method is used to initialize an invalid FileDescriptor object. + */ + public FileDescriptor() + { + channel = null; + } + + /** + * This method is used to initialize a FileDescriptor object. + */ + FileDescriptor(ByteChannel channel) + { + this.channel = channel; + } + + + /** + * This method forces all data that has not yet been physically written to + * the underlying storage medium associated with this + * FileDescriptor + * to be written out. This method will not return until all data has + * been fully written to the underlying device. If the device does not + * support this functionality or if an error occurs, then an exception + * will be thrown. + */ + public void sync () throws SyncFailedException + { + if (channel instanceof FileChannel) + { + try + { + ((FileChannel) channel).force(true); + } + catch (IOException ex) + { + if (ex instanceof SyncFailedException) + throw (SyncFailedException) ex; + else + throw new SyncFailedException(ex.toString()); + } + } + } + + /** + * This methods tests whether or not this object represents a valid open + * native file handle. + * + * @return true if this object represents a valid + * native file handle, false otherwise + */ + public boolean valid () + { + ByteChannel c = channel; + return (c != null) && (c.isOpen()); + } +} -- cgit v1.2.3