[kaffe] CVS kaffe (robilad): resynced with gnu classpath: nio fix
Kaffe CVS
cvs-commits at kaffe.org
Sun May 15 03:13:42 PDT 2005
PatchSet 6478
Date: 2005/05/15 09:56:41
Author: robilad
Branch: HEAD
Tag: (none)
Log:
resynced with gnu classpath: nio fix
2005-05-15 Dalibor Topic <robilad at kaffe.org>
Resynced with GNU Classpath.
2005-04-26 Luca Barbieri <luca.barbieri at gmail.com>
* gnu/java/nio/channels/FileChannelImpl.java (tryLock): Pass
'false' to native lock().
(lock): Pass 'true' to native lock().
Members:
libraries/javalib/gnu/java/nio/channels/FileChannelImpl.java:INITIAL->1.8
ChangeLog:1.4005->1.4006
===================================================================
Checking out kaffe/libraries/javalib/gnu/java/nio/channels/FileChannelImpl.java
RCS: /home/cvs/kaffe/kaffe/libraries/javalib/gnu/java/nio/channels/FileChannelImpl.java,v
VERS: 1.8
***************
--- /dev/null Sun Aug 4 19:57:58 2002
+++ kaffe/libraries/javalib/gnu/java/nio/channels/FileChannelImpl.java Sun May 15 10:13:41 2005
@@ -0,0 +1,524 @@
+/* FileChannelImpl.java --
+ Copyright (C) 2002, 2004, 2005 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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 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 gnu.java.nio.channels;
+
+import gnu.classpath.Configuration;
+import gnu.java.nio.FileLockImpl;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.MappedByteBuffer;
+import java.nio.channels.ClosedChannelException;
+import java.nio.channels.FileChannel;
+import java.nio.channels.FileLock;
+import java.nio.channels.NonReadableChannelException;
+import java.nio.channels.NonWritableChannelException;
+import java.nio.channels.ReadableByteChannel;
+import java.nio.channels.WritableByteChannel;
+
+/**
+ * This file is not user visible !
+ * But alas, Java does not have a concept of friendly packages
+ * so this class is public.
+ * Instances of this class are created by invoking getChannel
+ * Upon a Input/Output/RandomAccessFile object.
+ */
+public final class FileChannelImpl extends FileChannel
+{
+ // These are mode values for open().
+ public static final int READ = 1;
+ public static final int WRITE = 2;
+ public static final int APPEND = 4;
+
+ // EXCL is used only when making a temp file.
+ public static final int EXCL = 8;
+ public static final int SYNC = 16;
+ public static final int DSYNC = 32;
+
+ private static native void init();
+
+ static
+ {
+ if (Configuration.INIT_LOAD_LIBRARY)
+ {
+ System.loadLibrary("nio");
+ }
+
+ init();
+ }
+
+ /**
+ * This is the actual native file descriptor value
+ */
+ // System's notion of file descriptor. It might seem redundant to
+ // initialize this given that it is reassigned in the constructors.
+ // However, this is necessary because if open() throws an exception
+ // we want to make sure this has the value -1. This is the most
+ // efficient way to accomplish that.
+ private int fd = -1;
+
+ private int mode;
+
+ public FileChannelImpl ()
+ {
+ }
+
+ /* Open a file. MODE is a combination of the above mode flags. */
+ public FileChannelImpl (File file, int mode) throws FileNotFoundException
+ {
+ final String path = file.getPath();
+ fd = open (path, mode);
+ this.mode = mode;
+
+ // First open the file and then check if it is a a directory
+ // to avoid race condition.
+ if (file.isDirectory())
+ {
+ try
+ {
+ close();
+ }
+ catch (IOException e)
+ {
+ /* ignore it */
+ }
+
+ throw new FileNotFoundException(path + " is a directory");
+ }
+ }
+
+ /* Used by init() (native code) */
+ FileChannelImpl (int fd, int mode)
+ {
+ this.fd = fd;
+ this.mode = mode;
+ }
+
+ public static FileChannelImpl in;
+ public static FileChannelImpl out;
+ public static FileChannelImpl err;
+
+ private native int open (String path, int mode) throws FileNotFoundException;
+
+ public native int available () throws IOException;
+ private native long implPosition () throws IOException;
+ private native void seek (long newPosition) throws IOException;
+ private native void implTruncate (long size) throws IOException;
+
+ public native void unlock (long pos, long len) throws IOException;
+
+ public native long size () throws IOException;
+
+ protected native void implCloseChannel() throws IOException;
+
+ /**
+ * Makes sure the Channel is properly closed.
+ */
+ protected void finalize() throws IOException
+ {
+ this.close();
+ }
+
+ public int read (ByteBuffer dst) throws IOException
+ {
+ int result;
+ byte[] buffer = new byte [dst.remaining ()];
+
+ result = read (buffer, 0, buffer.length);
+
+ if (result > 0)
+ dst.put (buffer, 0, result);
+
+ return result;
+ }
+
+ public int read (ByteBuffer dst, long position)
+ throws IOException
+ {
+ if (position < 0)
+ throw new IllegalArgumentException ();
+ long oldPosition = implPosition ();
+ position (position);
+ int result = read(dst);
+ position (oldPosition);
+
+ return result;
+ }
+
+ public native int read ()
+ throws IOException;
+
+ public native int read (byte[] buffer, int offset, int length)
+ throws IOException;
+
+ public long read (ByteBuffer[] dsts, int offset, int length)
+ throws IOException
+ {
+ long result = 0;
+
+ for (int i = offset; i < offset + length; i++)
+ {
+ result += read (dsts [i]);
+ }
+
+ return result;
+ }
+
+ public int write (ByteBuffer src) throws IOException
+ {
+ int len = src.remaining ();
+ if (src.hasArray())
+ {
+ byte[] buffer = src.array();
+ write(buffer, src.arrayOffset() + src.position(), len);
+ src.position(src.position() + len);
+ }
+ else
+ {
+ // Use a more efficient native method! FIXME!
+ byte[] buffer = new byte [len];
+ src.get (buffer, 0, len);
+ write (buffer, 0, len);
+ }
+ return len;
+ }
+
+ public int write (ByteBuffer src, long position)
+ throws IOException
+ {
+ if (position < 0)
+ throw new IllegalArgumentException ();
+
+ if (!isOpen ())
+ throw new ClosedChannelException ();
+
+ if ((mode & WRITE) == 0)
+ throw new NonWritableChannelException ();
+
+ int result;
+ long oldPosition;
+
+ oldPosition = implPosition ();
+ seek (position);
+ result = write(src);
+ seek (oldPosition);
+
+ return result;
+ }
+
+ public native void write (byte[] buffer, int offset, int length)
+ throws IOException;
+
+ public native void write (int b) throws IOException;
+
+ public long write(ByteBuffer[] srcs, int offset, int length)
+ throws IOException
+ {
+ long result = 0;
+
+ for (int i = offset;i < offset + length;i++)
+ {
+ result += write (srcs[i]);
+ }
+
+ return result;
+ }
+
+ public native MappedByteBuffer mapImpl (char mode, long position, int size)
+ throws IOException;
+
+ public MappedByteBuffer map (FileChannel.MapMode mode,
+ long position, long size)
+ throws IOException
+ {
+ char nmode = 0;
+ if (mode == MapMode.READ_ONLY)
+ {
+ nmode = 'r';
+ if ((this.mode & READ) == 0)
+ throw new NonReadableChannelException();
+ }
+ else if (mode == MapMode.READ_WRITE || mode == MapMode.PRIVATE)
+ {
+ nmode = mode == MapMode.READ_WRITE ? '+' : 'c';
+ if ((this.mode & (READ|WRITE)) != (READ|WRITE))
+ throw new NonWritableChannelException();
+ }
+ else
+ throw new IllegalArgumentException ();
+
+ if (position < 0 || size < 0 || size > Integer.MAX_VALUE)
+ throw new IllegalArgumentException ();
+ return mapImpl(nmode, position, (int) size);
+ }
+
+ /**
+ * msync with the disk
+ */
+ public void force (boolean metaData) throws IOException
+ {
+ if (!isOpen ())
+ throw new ClosedChannelException ();
+ }
+
+ // like transferTo, but with a count of less than 2Gbytes
+ private int smallTransferTo (long position, int count,
+ WritableByteChannel target)
+ throws IOException
+ {
+ ByteBuffer buffer;
+ try
+ {
+ // Try to use a mapped buffer if we can. If this fails for
+ // any reason we'll fall back to using a ByteBuffer.
+ buffer = map (MapMode.READ_ONLY, position, count);
+ }
+ catch (IOException e)
+ {
+ buffer = ByteBuffer.allocate (count);
+ read (buffer, position);
+ buffer.flip();
+ }
+
+ return target.write (buffer);
+ }
+
+ public long transferTo (long position, long count,
+ WritableByteChannel target)
+ throws IOException
+ {
+ if (position < 0
+ || count < 0)
+ throw new IllegalArgumentException ();
+
+ if (!isOpen ())
+ throw new ClosedChannelException ();
+
+ if ((mode & READ) == 0)
+ throw new NonReadableChannelException ();
+
+ final int pageSize = 65536;
+ long total = 0;
+
+ while (count > 0)
+ {
+ int transferred
+ = smallTransferTo (position, (int)Math.min (count, pageSize),
+ target);
+ if (transferred < 0)
+ break;
+ total += transferred;
+ position += transferred;
+ count -= transferred;
+ }
+
+ return total;
+ }
+
+ // like transferFrom, but with a count of less than 2Gbytes
+ private int smallTransferFrom (ReadableByteChannel src, long position,
+ int count)
+ throws IOException
+ {
+ ByteBuffer buffer = null;
+
+ if (src instanceof FileChannel)
+ {
+ try
+ {
+ // Try to use a mapped buffer if we can. If this fails
+ // for any reason we'll fall back to using a ByteBuffer.
+ buffer = ((FileChannel)src).map (MapMode.READ_ONLY, position,
+ count);
+ }
+ catch (IOException e)
+ {
+ }
+ }
+
+ if (buffer == null)
+ {
+ buffer = ByteBuffer.allocate ((int) count);
+ src.read (buffer);
+ buffer.flip();
+ }
+
+ return write (buffer, position);
+ }
+
+ public long transferFrom (ReadableByteChannel src, long position,
+ long count)
+ throws IOException
+ {
+ if (position < 0
+ || count < 0)
+ throw new IllegalArgumentException ();
+
+ if (!isOpen ())
+ throw new ClosedChannelException ();
+
+ if ((mode & WRITE) == 0)
+ throw new NonWritableChannelException ();
+
+ final int pageSize = 65536;
+ long total = 0;
+
+ while (count > 0)
+ {
+ int transferred = smallTransferFrom (src, position,
+ (int)Math.min (count, pageSize));
+ if (transferred < 0)
+ break;
+ total += transferred;
+ position += transferred;
+ count -= transferred;
+ }
+
+ return total;
+ }
+
+ public FileLock tryLock (long position, long size, boolean shared)
+ throws IOException
+ {
+ if (position < 0
+ || size < 0)
+ throw new IllegalArgumentException ();
+
+ if (!isOpen ())
+ throw new ClosedChannelException ();
+
+ if (shared && (mode & READ) == 0)
+ throw new NonReadableChannelException ();
+
+ if (!shared && (mode & WRITE) == 0)
+ throw new NonWritableChannelException ();
+
+ boolean completed = false;
+
+ try
+ {
+ begin();
+ lock(position, size, shared, false);
+ completed = true;
+ return new FileLockImpl(this, position, size, shared);
+ }
+ finally
+ {
+ end(completed);
+ }
+ }
+
+ /** Try to acquire a lock at the given position and size.
+ * On success return true.
+ * If wait as specified, block until we can get it.
+ * Otherwise return false.
+ */
+ private native boolean lock(long position, long size,
+ boolean shared, boolean wait) throws IOException;
+
+ public FileLock lock (long position, long size, boolean shared)
+ throws IOException
+ {
+ if (position < 0
+ || size < 0)
+ throw new IllegalArgumentException ();
+
+ if (!isOpen ())
+ throw new ClosedChannelException ();
+
+ boolean completed = false;
+
+ try
+ {
+ boolean lockable = lock(position, size, shared, true);
+ completed = true;
+ return (lockable
+ ? new FileLockImpl(this, position, size, shared)
+ : null);
+ }
+ finally
+ {
+ end(completed);
+ }
+ }
+
+ public long position ()
+ throws IOException
+ {
+ if (!isOpen ())
+ throw new ClosedChannelException ();
+
+ return implPosition ();
+ }
+
+ public FileChannel position (long newPosition)
+ throws IOException
+ {
+ if (newPosition < 0)
+ throw new IllegalArgumentException ();
+
+ if (!isOpen ())
+ throw new ClosedChannelException ();
+
+ // FIXME note semantics if seeking beyond eof.
+ // We should seek lazily - only on a write.
+ seek (newPosition);
+ return this;
+ }
+
+ public FileChannel truncate (long size)
+ throws IOException
+ {
+ if (size < 0)
+ throw new IllegalArgumentException ();
+
+ if (!isOpen ())
+ throw new ClosedChannelException ();
+
+ if ((mode & WRITE) == 0)
+ throw new NonWritableChannelException ();
+
+ if (size < size ())
+ implTruncate (size);
+
+ return this;
+ }
+}
Index: kaffe/ChangeLog
diff -u kaffe/ChangeLog:1.4005 kaffe/ChangeLog:1.4006
--- kaffe/ChangeLog:1.4005 Sun May 15 09:49:30 2005
+++ kaffe/ChangeLog Sun May 15 09:56:31 2005
@@ -2,6 +2,16 @@
Resynced with GNU Classpath.
+ 2005-04-26 Luca Barbieri <luca.barbieri at gmail.com>
+
+ * gnu/java/nio/channels/FileChannelImpl.java (tryLock): Pass
+ 'false' to native lock().
+ (lock): Pass 'true' to native lock().
+
+2005-05-15 Dalibor Topic <robilad at kaffe.org>
+
+ Resynced with GNU Classpath.
+
2005-04-26 Tom Tromey <tromey at redhat.com>
* gnu/java/nio/charset/iconv/IconvCharset.java (name):
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