+++ /dev/null
-/* FileChannelImpl.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., 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 java.nio.channels;
-
-import gnu.classpath.Configuration;
-import gnu.gcj.RawData;
-import gnu.java.nio.FileLockImpl;
-import java.io.EOFException;
-import java.io.FileDescriptor;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.RandomAccessFile;
-import java.nio.ByteBuffer;
-import java.nio.MappedByteBuffer;
-import java.nio.MappedByteBufferImpl;
-
-/**
- * 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 class FileChannelImpl extends FileChannel
-{
- static
- {
- // load the shared library needed for native methods.
- if (Configuration.INIT_LOAD_LIBRARY)
- {
- System.loadLibrary ("javanio");
- }
- }
-
- public RawData map_address;
-
- int length;
- FileDescriptor fd;
- MappedByteBuffer buf;
- Object file_obj; // just to keep it live...
-
- public FileChannelImpl (FileDescriptor fd, boolean write, Object obj)
- {
- if (!(obj instanceof RandomAccessFile)
- && !(obj instanceof FileInputStream)
- && !(obj instanceof FileOutputStream))
- throw new InternalError ();
-
- this.fd = fd;
- this.file_obj = obj;
- }
-
- public FileChannelImpl ()
- {
- this (new FileDescriptor (), true, null);
- }
-
- private native long implPosition ();
- private native FileChannel implPosition (long newPosition);
- private native FileChannel implTruncate (long size);
-
- private native RawData nio_mmap_file (long pos, long size, int mode);
- private native void nio_unmmap_file (RawData map_address, int size);
- private native void nio_msync (RawData map_address, int length);
-
- public native long size () throws IOException;
-
- protected void implCloseChannel() throws IOException
- {
- if (map_address != null)
- {
- nio_unmmap_file (map_address, (int) length);
- map_address = null;
- }
-
- if (file_obj instanceof RandomAccessFile)
- {
- RandomAccessFile o = (RandomAccessFile) file_obj;
- o.close();
- }
- else if (file_obj instanceof FileInputStream)
- {
- FileInputStream o = (FileInputStream) file_obj;
- o.close();
- }
- else if (file_obj instanceof FileOutputStream)
- {
- FileOutputStream o = (FileOutputStream) file_obj;
- o.close();
- }
- }
-
- public int read (ByteBuffer dst) throws IOException
- {
- // Check if file is mapped into memory.
- if (buf != null)
- {
- // FIXME: implement this
- throw new Error ("Accessing mapped buffers not implemented.");
- }
-
- // File not mapped, access it directly.
- return implRead (dst);
- }
-
- public int read (ByteBuffer dst, long position)
- throws IOException
- {
- if (position < 0)
- throw new IllegalArgumentException ();
-
- if (!isOpen ())
- throw new ClosedChannelException ();
-
- if (file_obj instanceof FileOutputStream)
- throw new NonReadableChannelException ();
-
- int result;
- long oldPosition;
-
- oldPosition = implPosition ();
- position (position);
- result = implRead (dst);
- implPosition (oldPosition);
-
- return result;
- }
-
- private int implRead (ByteBuffer dst) throws IOException
- {
- int result;
- byte[] buffer = new byte [dst.remaining ()];
-
- result = implRead (buffer, 0, buffer.length);
-
- if (result > 0)
- dst.put (buffer, 0, result);
-
- return result;
- }
-
- private native int implRead (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
- {
- // Check if file is mapped into memory.
- if (buf != null)
- {
- // FIXME: implement this
- throw new Error ("Accessing mapped buffers not implemented.");
- }
-
- // File not mapped, access it directly.
- return implWrite (src);
- }
-
- public int write (ByteBuffer src, long position)
- throws IOException
- {
- if (position < 0)
- throw new IllegalArgumentException ();
-
- if (!isOpen ())
- throw new ClosedChannelException ();
-
- if (file_obj instanceof FileInputStream)
- throw new NonWritableChannelException ();
-
- int result;
- long oldPosition;
-
- oldPosition = implPosition ();
- position (position);
- result = implWrite (src);
- implPosition (oldPosition);
-
- return result;
- }
-
- private int implWrite (ByteBuffer src) throws IOException
- {
- byte[] buffer = new byte [src.remaining ()];
-
- src.get (buffer, 0, buffer.length);
- return implWrite (buffer, 0, buffer.length);
- }
-
- private native int implWrite (byte[] buffer, int offset, int length)
- 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 MappedByteBuffer map (FileChannel.MapMode mode, long position,
- long size)
- throws IOException
- {
- if ((mode != MapMode.READ_ONLY
- && mode != MapMode.READ_WRITE
- && mode != MapMode.PRIVATE)
- || position < 0
- || size < 0
- || size > Integer.MAX_VALUE)
- throw new IllegalArgumentException ();
-
- // FIXME: Make this working.
- int cmode = mode.m;
- map_address = nio_mmap_file (position, size, cmode);
- length = (int) size;
- buf = new MappedByteBufferImpl (this);
- return buf;
- }
-
- static MappedByteBuffer create_direct_mapped_buffer (RawData map_address,
- long length)
- throws IOException
- {
- FileChannelImpl ch = new FileChannelImpl ();
- ch.map_address = map_address;
- ch.length = (int) length;
- ch.buf = new MappedByteBufferImpl (ch);
- return ch.buf;
- }
-
- /**
- * msync with the disk
- */
- public void force (boolean metaData) throws IOException
- {
- if (!isOpen ())
- throw new ClosedChannelException ();
-
- // FIXME: What to do with metaData ?
-
- nio_msync (map_address, length);
- }
-
- 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 (file_obj instanceof FileOutputStream)
- throw new NonReadableChannelException ();
-
- // XXX: count needs to be casted from long to int. Dataloss ?
- ByteBuffer buffer = ByteBuffer.allocate ((int) count);
- read (buffer, position);
- buffer.flip();
- return target.write (buffer);
- }
-
- 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 (file_obj instanceof FileInputStream)
- throw new NonWritableChannelException ();
-
- // XXX: count needs to be casted from long to int. Dataloss ?
- ByteBuffer buffer = ByteBuffer.allocate ((int) count);
- src.read (buffer);
- buffer.flip();
- return write (buffer, position);
- }
-
- public FileLock lock (long position, long size, boolean shared)
- throws IOException
- {
- if (position < 0
- || size < 0)
- throw new IllegalArgumentException ();
-
- if (!isOpen ())
- throw new ClosedChannelException ();
-
- if (shared &&
- file_obj instanceof FileOutputStream)
- throw new NonReadableChannelException ();
-
- if (!shared &&
- file_obj instanceof FileInputStream)
- throw new NonWritableChannelException ();
-
- boolean completed = false;
-
- try
- {
- begin();
- lockImpl(position, size, shared);
- completed = true;
- return new FileLockImpl(fd, this, position, size, shared);
- }
- finally
- {
- end(completed);
- }
- }
-
- private native void lockImpl(long position, long size, boolean shared);
-
- 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 (! tryLockImpl(position, size, shared))
- return null;
-
- boolean completed = false;
-
- try
- {
- boolean lockable = tryLockImpl(position, size, shared);
- completed = true;
- return (lockable
- ? new FileLockImpl(fd, this, position, size, shared)
- : null);
- }
- finally
- {
- end(completed);
- }
- }
-
- private native boolean tryLockImpl(long position, long size, boolean shared);
-
- 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 ();
-
- return implPosition (newPosition);
- }
-
- public FileChannel truncate (long size)
- throws IOException
- {
- if (size < 0)
- throw new IllegalArgumentException ();
-
- if (!isOpen ())
- throw new ClosedChannelException ();
-
- if (file_obj instanceof FileInputStream)
- throw new NonWritableChannelException ();
-
- return implTruncate (size);
- }
-}
+++ /dev/null
-// natFileChannelImpl.cc
-
-/* Copyright (C) 2003 Free Software Foundation
-
- This file is part of libgcj.
-
-This software is copyrighted work licensed under the terms of the
-Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
-details. */
-
-#include <config.h>
-
-#include <jvm.h>
-
-#include <errno.h>
-#include <string.h>
-#include <sys/types.h>
-
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-#ifdef HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-
-#include <gnu/gcj/RawData.h>
-#include <gnu/java/nio/FileLockImpl.h>
-#include <java/io/FileDescriptor.h>
-#include <java/io/IOException.h>
-#include <java/nio/ByteBuffer.h>
-#include <java/nio/channels/FileChannel.h>
-#include <java/nio/channels/FileChannelImpl.h>
-#include <java/nio/channels/FileLock.h>
-
-jlong
-java::nio::channels::FileChannelImpl::size ()
-{
- return fd->getLength ();
-}
-
-jlong
-java::nio::channels::FileChannelImpl::implPosition ()
-{
- return fd->getFilePointer ();
-}
-
-java::nio::channels::FileChannel*
-java::nio::channels::FileChannelImpl::implPosition (jlong newPosition)
-{
- fd->seek (newPosition, ::java::io::FileDescriptor::SET, true);
- return this;
-}
-
-jint
-java::nio::channels::FileChannelImpl::implRead (JArray<jbyte>* buffer,
- jint offset, jint len)
-{
- return fd->read (buffer, offset, len);
-}
-
-jint
-java::nio::channels::FileChannelImpl::implWrite (JArray<jbyte>* buffer,
- jint offset, jint len)
-{
- fd->write (buffer, offset, len);
- return len;
-}
-
-java::nio::channels::FileChannel*
-java::nio::channels::FileChannelImpl::implTruncate (jlong size)
-{
- fd->setLength (size);
- return this;
-}
-
-gnu::gcj::RawData*
-java::nio::channels::FileChannelImpl::nio_mmap_file (jlong /*pos*/, jlong /*size*/,
- jint /*mode*/)
-{
- throw new ::java::io::IOException (JvNewStringUTF ("mmap not implemented"));
-}
-
-void
-java::nio::channels::FileChannelImpl::nio_unmmap_file (gnu::gcj::RawData* /*address*/,
- jint /*size*/)
-{
- throw new ::java::io::IOException (JvNewStringUTF ("munmap not implemented"));
-}
-
-void
-java::nio::channels::FileChannelImpl::nio_msync (gnu::gcj::RawData* /*map_address*/,
- jint /*length*/)
-{
- throw new ::java::io::IOException (JvNewStringUTF ("msync not implemented"));
-}
-
-void
-java::nio::channels::FileChannelImpl::lockImpl(jlong position, jlong size, jboolean shared)
-{
- // FIXME: shared is unused, write is always true.
- fd->lock(position, size, true);
-}
-
-jboolean
-java::nio::channels::FileChannelImpl::tryLockImpl(jlong position, jlong size, jboolean shared)
-{
- // FIXME: shared is unused, write is always true.
- return fd->tryLock(position, size, true);
-}
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