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. --- .../classpath/java/nio/channels/FileChannel.java | 357 +++++++++++++++++++++ 1 file changed, 357 insertions(+) create mode 100644 libjava/classpath/java/nio/channels/FileChannel.java (limited to 'libjava/classpath/java/nio/channels/FileChannel.java') diff --git a/libjava/classpath/java/nio/channels/FileChannel.java b/libjava/classpath/java/nio/channels/FileChannel.java new file mode 100644 index 000000000..8c8029fe7 --- /dev/null +++ b/libjava/classpath/java/nio/channels/FileChannel.java @@ -0,0 +1,357 @@ +/* FileChannel.java -- + Copyright (C) 2002 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.nio.channels; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.nio.MappedByteBuffer; +import java.nio.channels.spi.AbstractInterruptibleChannel; + + +/** + * @author Michael Koch + * @since 1.4 + */ +public abstract class FileChannel extends AbstractInterruptibleChannel + implements ByteChannel, GatheringByteChannel, ScatteringByteChannel +{ + public static class MapMode + { + int m; + public static final MapMode READ_ONLY = new MapMode(0); + public static final MapMode READ_WRITE = new MapMode(1); + public static final MapMode PRIVATE = new MapMode(2); + + /** + * Initializes the MapMode. + */ + MapMode(int a) + { + m = a; + } + + /** + * Returns a string representation of the MapMode object. + */ + public String toString() + { + if (this == READ_ONLY) + return "READ_ONLY"; + else if (this == READ_WRITE) + return "READ_WRITE"; + + return "PRIVATE"; + } + } + + /** + * Initializes the channel. + */ + protected FileChannel() + { + } + + /** + * Maps the file into the memory. + * + * @exception IllegalArgumentException If the preconditions on the parameters + * do not hold. + * @exception IOException If an I/O error occurs. + * @exception NonReadableChannelException If mode is READ_ONLY but this channel was + * not opened for reading. + * @exception NonWritableChannelException If mode is READ_WRITE or PRIVATE but this + * channel was not opened for writing. + */ + public abstract MappedByteBuffer map(MapMode mode, long position, long size) + throws IOException; + + /** + * Return the size of the file thus far + * + * @exception ClosedChannelException If this channel is closed. + */ + public abstract long size() throws IOException; + + /** + * Writes data to the channel. + * + * @exception IOException If an I/O error occurs. + */ + public final long write(ByteBuffer[] srcs) throws IOException + { + return write(srcs, 0, srcs.length); + } + + /** + * Writes data to the channel. + * + * @exception IOException If an I/O error occurs. + */ + public abstract int write(ByteBuffer src) throws IOException; + + /** + * Writes data to the channel. + * + * @exception AsynchronousCloseException If another thread closes this channel + * while the transfer is in progress. + * @exception ClosedByInterruptException If another thread interrupts the + * current thread while the transfer is in progress, thereby closing both + * channels and setting the current thread's interrupt status. + * @exception ClosedChannelException If this channel is closed. + * @exception IllegalArgumentException If position is negative. + * @exception IOException If an I/O error occurs. + * @exception NonWritableChannelException If this channel was not opened for + * writing. + */ + public abstract int write(ByteBuffer srcs, long position) + throws IOException; + + /** + * Writes data to the channel. + * + * @exception IOException If an I/O error occurs. + */ + public abstract long write(ByteBuffer[] srcs, int offset, int length) + throws IOException; + + /** + * Reads data from the channel. + * + * @exception IOException If an I/O error occurs. + */ + public abstract long read(ByteBuffer[] dsts, int offset, int length) + throws IOException; + + /** + * Reads data from the channel. + * + * @exception IOException If an I/O error occurs. + */ + public final long read(ByteBuffer[] dsts) throws IOException + { + return read(dsts, 0, dsts.length); + } + + /** + * Reads data from the channel. + * + * @exception IOException If an I/O error occurs. + */ + public abstract int read(ByteBuffer dst) throws IOException; + + /** + * Reads data from the channel. + * + * @exception AsynchronousCloseException If another thread closes this channel + * while the transfer is in progress. + * @exception ClosedByInterruptException If another thread interrupts the + * current thread while the transfer is in progress, thereby closing both + * channels and setting the current thread's interrupt status. + * @exception ClosedChannelException If this channel is closed. + * @exception IllegalArgumentException If position is negative. + * @exception IOException If an I/O error occurs. + * @exception NonReadableChannelException If this channel was not opened for + * reading. + */ + public abstract int read(ByteBuffer dst, long position) + throws IOException; + + /** + * Closes the channel. + * + * This is called from @see close. + * + * @exception IOException If an I/O error occurs. + */ + protected abstract void implCloseChannel() throws IOException; + + /** + * msync with the disk + * + * @exception ClosedChannelException If this channel is closed. + * @exception IOException If an I/O error occurs. + */ + public abstract void force(boolean metaData) throws IOException; + + /** + * Creates a file lock for the whole associated file. + * + * @exception AsynchronousCloseException If another thread closes this channel + * while the transfer is in progress. + * @exception ClosedChannelException If this channel is closed. + * @exception FileLockInterruptionException If the invoking thread is + * interrupted while blocked in this method. + * @exception IOException If an I/O error occurs. + * @exception NonReadableChannelException If shared is true and this channel + * was not opened for reading. + * @exception NonWritableChannelException If shared is false and this channel + * was not opened for writing. + * @exception OverlappingFileLockException If a lock that overlaps the + * requested region is already held by this Java virtual machine, or if + * another thread is already blocked in this method and is attempting to lock + * an overlapping region. + */ + public final FileLock lock() throws IOException + { + return lock(0, Long.MAX_VALUE, false); + } + + /** + * Creates a file lock for a region of the associated file. + * + * @exception AsynchronousCloseException If another thread closes this channel + * while the transfer is in progress. + * @exception ClosedChannelException If this channel is closed. + * @exception FileLockInterruptionException If the invoking thread is + * interrupted while blocked in this method. + * @exception IllegalArgumentException If the preconditions on the parameters + * do not hold. + * @exception IOException If an I/O error occurs. + * @exception OverlappingFileLockException If a lock that overlaps the + * requested region is already held by this Java virtual machine, or if + * another thread is already blocked in this method and is attempting to lock + * an overlapping region. + * @exception NonReadableChannelException If shared is true and this channel + * was not opened for reading. + * @exception NonWritableChannelException If shared is false and this channel + * was not opened for writing. + */ + public abstract FileLock lock(long position, long size, boolean shared) + throws IOException; + + /** + * Tries to aqquire alock on the whole associated file. + * + * @exception ClosedChannelException If this channel is closed. + * @exception IOException If an I/O error occurs. + * @exception OverlappingFileLockException If a lock that overlaps the + * requested region is already held by this Java virtual machine, or if + * another thread is already blocked in this method and is attempting to lock + * an overlapping region. + */ + public final FileLock tryLock() throws IOException + { + return tryLock(0, Long.MAX_VALUE, false); + } + + /** + * Tries to aqquire a lock on a region of the associated file. + * + * @exception ClosedChannelException If this channel is closed. + * @exception IllegalArgumentException If the preconditions on the parameters + * do not hold. + * @exception IOException If an I/O error occurs. + * @exception OverlappingFileLockException If a lock that overlaps the + * requested region is already held by this Java virtual machine, or if + * another thread is already blocked in this method and is attempting to lock + * an overlapping region. + */ + public abstract FileLock tryLock(long position, long size, boolean shared) + throws IOException; + + /** + * Returns the current position on the file. + * + * @exception ClosedChannelException If this channel is closed. + * @exception IOException If an I/O error occurs. + */ + public abstract long position() throws IOException; + + /** + * Sets the position of the channel on the assoziated file. + * + * @exception ClosedChannelException If this channel is closed. + * @exception IllegalArgumentException If newPosition is negative. + * @exception IOException If an I/O error occurs. + */ + public abstract FileChannel position(long newPosition) + throws IOException; + + /** + * Transfers bytes from this channel's file to the given writable byte + * channel. + * + * @exception AsynchronousCloseException If another thread closes this channel + * while the transfer is in progress. + * @exception ClosedByInterruptException If another thread interrupts the + * current thread while the transfer is in progress, thereby closing both + * channels and setting the current thread's interrupt status. + * @exception ClosedChannelException If this channel is closed. + * @exception IllegalArgumentException If the preconditions on the parameters + * do not hold. + * @exception IOException If an I/O error occurs. + * @exception NonReadableChannelException If this channel was not opened for + * reading. + * @exception NonWritableChannelException If the target channel was not + * opened for writing. + */ + public abstract long transferTo(long position, long count, + WritableByteChannel target) + throws IOException; + + /** + * Transfers bytes from the given readable channel into this channel. + * + * @exception AsynchronousCloseException If another thread closes this channel + * while the transfer is in progress. + * @exception ClosedByInterruptException If another thread interrupts the + * current thread while the transfer is in progress, thereby closing both + * channels and setting the current thread's interrupt status. + * @exception ClosedChannelException If this channel is closed. + * @exception IllegalArgumentException If the preconditions on the parameters + * do not hold. + * @exception IOException If an I/O error occurs. + * @exception NonReadableChannelException If the source channel was not + * opened for reading. + * @exception NonWritableChannelException If this channel was not opened for + * writing. + */ + public abstract long transferFrom(ReadableByteChannel src, long position, + long count) throws IOException; + + /** + * Truncates the channel's file at size. + * + * @exception ClosedChannelException If this channel is closed. + * @exception IllegalArgumentException If size is negative. + * @exception IOException If an I/O error occurs. + * @exception NonWritableChannelException If this channel was not opened for + * writing. + */ + public abstract FileChannel truncate(long size) throws IOException; +} -- cgit v1.2.3