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FileChannelImpl.java: New class, renamed from java/nio/channels.

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* gnu/java/nio/channels/FileChannelImpl.java:  New class, renamed
	from java/nio/channels.  Don't depend on FileDescriptor.
	(in, out, err):  New static fields.
	(mode):  New field.
	(SET, CUR, READ, WRITE, APPEND, EXCL, SYNC, DSYNC):  Moved constants
	from FileDescriptor.
	(by):  Removed MappedByteBuffer field.
	(map):  New working implementation.
	* gnu/java/nio/channels/natFileChannelPosix.cc:  New file, though
	some code "ported" from natFileDescriptoPosix.cc.
	* gnu/java/nio/channels/natFileChannelEcos.cc:  Likewise.
	* gnu/java/nio/channels/natFileChannelWin32.cc  Likewise.

From-SVN: r78659
This commit is contained in:
Per Bothner 2004-02-29 11:09:28 -08:00
parent 2f537af9e7
commit 612e660987
4 changed files with 1533 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

420
libjava/gnu/java/nio/channels/FileChannelImpl.java Normal file
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/* FileChannelImpl.java --
Copyright (C) 2002, 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., 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.gcj.RawData;
import gnu.java.nio.FileLockImpl;
import java.io.*;
import java.nio.ByteBuffer;
import java.nio.MappedByteBuffer;
import java.nio.channels.*;
/**
* 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
{
int mode;
// These are WHENCE values for seek.
static final int SET = 0;
static final int CUR = 1;
// These are mode values for open().
static final int READ = 1;
static final int WRITE = 2;
static final int APPEND = 4;
// EXCL is used only when making a temp file.
static final int EXCL = 8;
static final int SYNC = 16;
static final int DSYNC = 32;
/**
* 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;
int length;
private long pos;
public FileChannelImpl ()
{
}
/* Open a file. MODE is a combination of the above mode flags. */
public FileChannelImpl (String path, int mode) throws FileNotFoundException
{
fd = open (path, mode);
this.mode = mode;
}
private static native void init();
static { init (); }
public static FileChannelImpl in;
public static FileChannelImpl out;
public static FileChannelImpl err;
private native int open (String path, int mode) throws FileNotFoundException;
/** Attach to an already-opened file. */
public FileChannelImpl (int desc, int mode)
{
fd = desc;
this.mode = mode;
}
native int available () throws IOException;
private native long implPosition ();
private native void seek (long newPosition);
private native void implTruncate (long size);
public native void unlock (long pos, long len);
public native long size () throws IOException;
protected native void implCloseChannel() throws IOException;
public int read (ByteBuffer dst) throws IOException
{
return implRead (dst);
}
public int read (ByteBuffer dst, long position)
throws IOException
{
if (position < 0)
throw new IllegalArgumentException ();
long oldPosition = implPosition ();
position (position);
int result = implRead (dst);
position (oldPosition);
return result;
}
private int implRead (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 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
{
return implWrite (src);
}
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 = implWrite (src);
seek (oldPosition);
return result;
}
private int implWrite (ByteBuffer src) throws IOException
{
int len = src.remaining ();
if (src.hasArray())
{
byte[] buffer = src.array();
write(buffer, src.arrayOffset() + 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 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 ();
}
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 ();
// 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 ((mode & WRITE) == 0)
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 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, true);
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);
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, false);
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 ();
implTruncate (size);
return this;
}
}

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libjava/gnu/java/nio/channels/natFileChannelEcos.cc Normal file
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// natFileDescriptor.cc - Native part of FileDescriptor class.
/* Copyright (C) 1998, 1999, 2001, 2002 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 <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <gcj/cni.h>
#include <jvm.h>
#include <java/io/FileDescriptor.h>
#include <java/io/SyncFailedException.h>
#include <java/io/IOException.h>
#include <java/io/EOFException.h>
#include <java/lang/ArrayIndexOutOfBoundsException.h>
#include <java/lang/NullPointerException.h>
#include <java/lang/String.h>
#include <java/io/FileNotFoundException.h>
extern "C" void diag_write_char (char c);
static void
diag_write (char *data, int len)
{
while (len > 0)
{
diag_write_char (*data++);
len--;
}
}
#define NO_FSYNC_MESSAGE "sync unsupported"
void
java::io::FileDescriptor::init(void)
{
in = new java::io::FileDescriptor(0);
out = new java::io::FileDescriptor(1);
err = new java::io::FileDescriptor(2);
}
jboolean
java::io::FileDescriptor::valid (void)
{
return true;
}
void
java::io::FileDescriptor::sync (void)
{
// Some files don't support fsync. We don't bother reporting these
// as errors.
#ifdef HAVE_FSYNC
#else
throw new SyncFailedException (JvNewStringLatin1 (NO_FSYNC_MESSAGE));
#endif
}
jint
java::io::FileDescriptor::open (jstring path, jint jflags)
{
return fd;
}
void
java::io::FileDescriptor::write (jint b)
{
char d = (char) b;
::diag_write (&d, 1);
}
void
java::io::FileDescriptor::write (jbyteArray b, jint offset, jint len)
{
if (! b)
throw new java::lang::NullPointerException;
if (offset < 0 || len < 0 || offset + len > JvGetArrayLength (b))
throw new java::lang::ArrayIndexOutOfBoundsException;
char *bytes = (char *)elements (b) + offset;
::diag_write (bytes, len);
}
void
java::io::FileDescriptor::close (void)
{
}
void
java::io::FileDescriptor::setLength (long)
{
}
jint
java::io::FileDescriptor::seek (jlong pos, jint whence, jboolean)
{
JvAssert (whence == SET || whence == CUR);
return 0;
}
jlong
java::io::FileDescriptor::getLength (void)
{
return 0;
}
jlong
java::io::FileDescriptor::getFilePointer (void)
{
return 0;
}
jint
java::io::FileDescriptor::read (void)
{
return 0;
}
jint
java::io::FileDescriptor::read (jbyteArray buffer, jint offset, jint count)
{
return 0;
}
jint
java::io::FileDescriptor::available (void)
{
return 0;
}
void
java::io::FileDescriptor::lock (jlong pos, jint len, jboolean shared)
{
throw new IOException (JvNewStringLatin1
("java.io.FileDescriptor.lock() not implemented"));
}
jboolean
java::io::FileDescriptor::tryLock (jlong pos, jint len, jboolean shared)
{
throw new IOException (JvNewStringLatin1
("java.io.FileDescriptor.tryLock() not implemented"));
}
void
java::io::FileDescriptor::unlock (jlong pos, jint len)
{
throw new IOException (JvNewStringLatin1
("java.io.FileDescriptor.unlock() not implemented"));
}

522
libjava/gnu/java/nio/channels/natFileChannelPosix.cc Normal file
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// natFileChannelImplPosix.cc - Native part of FileChannelImpl class.
/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004 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 <platform.h>
#include <gcj/cni.h>
#include <gcj/javaprims.h>
#include <jvm.h>
#include "posix.h"
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <gnu/gcj/RawData.h>
#include <gnu/java/nio/FileLockImpl.h>
#include <gnu/java/nio/channels/FileChannelImpl.h>
#include <java/io/FileNotFoundException.h>
#include <java/io/IOException.h>
#include <java/io/SyncFailedException.h>
#include <java/io/InterruptedIOException.h>
#include <java/io/EOFException.h>
#include <java/lang/ArrayIndexOutOfBoundsException.h>
#include <java/lang/NullPointerException.h>
#include <java/lang/System.h>
#include <java/lang/String.h>
#include <java/lang/Thread.h>
#include <java/nio/ByteBuffer.h>
#include <java/nio/MappedByteBufferImpl.h>
#include <java/nio/channels/FileChannel.h>
#include <java/nio/channels/FileLock.h>
#include <gnu/java/nio/channels/FileChannelImpl.h>
#ifdef HAVE_SYS_IOCTL_H
#define BSD_COMP /* Get FIONREAD on Solaris2. */
#include <sys/ioctl.h>
#endif
// Pick up FIONREAD on Solaris 2.5.
#ifdef HAVE_SYS_FILIO_H
#include <sys/filio.h>
#endif
#ifdef HAVE_MMAP
#include <sys/mman.h>
#endif
using gnu::gcj::RawData;
using java::io::IOException;
using java::nio::MappedByteBufferImpl;
using java::io::InterruptedIOException;
using java::io::FileNotFoundException;
using java::lang::ArrayIndexOutOfBoundsException;
using gnu::java::nio::channels::FileChannelImpl;
#define NO_FSYNC_MESSAGE "sync unsupported"
void
FileChannelImpl::init(void)
{
in = new FileChannelImpl((jint) 0, FileChannelImpl::READ);
out = new FileChannelImpl((jint) 1, FileChannelImpl::WRITE);
err = new FileChannelImpl((jint) 2, FileChannelImpl::WRITE);
}
#if 0
jboolean
FileChannelImpl::valid (void)
{
struct stat sb;
return fd >= 0 && ::fstat (fd, &sb) == 0;
}
void
FileChannelImpl::sync (void)
{
// Some files don't support fsync. We don't bother reporting these
// as errors.
#ifdef HAVE_FSYNC
if (::fsync (fd) && errno != EROFS && errno != EINVAL)
throw new SyncFailedException (JvNewStringLatin1 (strerror (errno)));
#else
throw new SyncFailedException (JvNewStringLatin1 (NO_FSYNC_MESSAGE));
#endif
}
#endif
jint
FileChannelImpl::open (jstring path, jint jflags)
{
fd = -1;
char *buf = (char *) _Jv_AllocBytes (_Jv_GetStringUTFLength (path) + 1);
jsize total = JvGetStringUTFRegion (path, 0, path->length(), buf);
buf[total] = '\0';
int flags = 0;
#ifdef O_BINARY
flags |= O_BINARY;
#endif
JvAssert ((jflags & READ) || (jflags & WRITE));
int mode = 0666;
if ((jflags & READ) && (jflags & WRITE))
flags |= O_RDWR | O_CREAT;
else if ((jflags & READ))
flags |= O_RDONLY;
else
{
flags |= O_WRONLY | O_CREAT;
if ((jflags & APPEND))
flags |= O_APPEND;
else
flags |= O_TRUNC;
if ((jflags & EXCL))
{
flags |= O_EXCL;
// In this case we are making a temp file.
mode = 0600;
}
}
if ((jflags & SYNC))
flags |= O_SYNC;
if ((jflags & DSYNC))
flags |= O_DSYNC;
int fd = ::open (buf, flags, mode);
if (fd == -1 && errno == EMFILE)
{
// Because finalize () calls close () we might be able to continue.
::java::lang::System::gc ();
::java::lang::System::runFinalization ();
fd = ::open (buf, flags, mode);
}
if (fd == -1)
{
char msg[MAXPATHLEN + 200];
// We choose the formatting here for JDK compatibility, believe
// it or not.
sprintf (msg, "%.*s (%.*s)",
MAXPATHLEN + 150, buf,
40, strerror (errno));
throw new ::java::io::FileNotFoundException (JvNewStringLatin1 (msg));
}
_Jv_platform_close_on_exec (fd);
return fd;
}
void
FileChannelImpl::write (jint b)
{
jbyte d = (jbyte) b;
int r = 0;
while (r != 1)
{
r = ::write (fd, &d, 1);
if (r == -1)
{
if (::java::lang::Thread::interrupted())
{
::java::io::InterruptedIOException *iioe
= new ::java::io::InterruptedIOException (JvNewStringLatin1 (strerror (errno)));
iioe->bytesTransferred = r == -1 ? 0 : r;
throw iioe;
}
if (errno != EINTR)
throw new IOException (JvNewStringLatin1 (strerror (errno)));
}
}
pos++;
}
void
FileChannelImpl::write (jbyteArray b, jint offset, jint len)
{
if (! b)
throw new ::java::lang::NullPointerException;
if (offset < 0 || len < 0 || offset + len > JvGetArrayLength (b))
throw new ArrayIndexOutOfBoundsException;
jbyte *bytes = elements (b) + offset;
int written = 0;
while (len > 0)
{
int r = ::write (fd, bytes, len);
if (r == -1)
{
if (::java::lang::Thread::interrupted())
{
InterruptedIOException *iioe
= new InterruptedIOException (JvNewStringLatin1 (strerror (errno)));
iioe->bytesTransferred = written;
throw iioe;
}
if (errno != EINTR)
throw new IOException (JvNewStringLatin1 (strerror (errno)));
}
written += r;
len -= r;
bytes += r;
pos += r;
}
}
void
FileChannelImpl::implCloseChannel (void)
{
jint save = fd;
fd = -1;
if (::close (save))
throw new IOException (JvNewStringLatin1 (strerror (errno)));
}
void
FileChannelImpl::implTruncate (jlong size)
{
struct stat sb;
#ifdef HAVE_FTRUNCATE
if (::fstat (fd, &sb))
throw new IOException (JvNewStringLatin1 (strerror (errno)));
if ((jlong) sb.st_size == size)
return;
// If the file is too short, we extend it. We can't rely on
// ftruncate() extending the file. So we lseek() to 1 byte less
// than we want, and then we write a single byte at the end.
if ((jlong) sb.st_size < size)
{
if (::lseek (fd, (off_t) (size - 1), SEEK_SET) == -1)
throw new IOException (JvNewStringLatin1 (strerror (errno)));
char out = '\0';
int r = ::write (fd, &out, 1);
if (r <= 0 || ::lseek (fd, pos, SEEK_SET) == -1)
throw new IOException (JvNewStringLatin1 (strerror (errno)));
}
else
{
if (::ftruncate (fd, (off_t) pos))
throw new IOException (JvNewStringLatin1 (strerror (errno)));
pos = size;
}
#else /* HAVE_FTRUNCATE */
throw new IOException (JvNewStringLatin1 ("FileDescriptor.setLength not implemented"));
#endif /* HAVE_FTRUNCATE */
}
void
FileChannelImpl::seek (jlong newPos)
{
off_t r = ::lseek (fd, (off_t) newPos, SEEK_SET);
if (r == -1)
throw new IOException (JvNewStringLatin1 (strerror (errno)));
pos = r;
}
jlong
FileChannelImpl::size (void)
{
struct stat sb;
if (::fstat (fd, &sb))
throw new IOException (JvNewStringLatin1 (strerror (errno)));
return sb.st_size;
}
jlong
FileChannelImpl::implPosition (void)
{
return pos;
}
jint
FileChannelImpl::read (void)
{
jbyte b;
int r;
do
{
r = ::read (fd, &b, 1);
if (r == 0)
return -1;
if (r == -1)
{
if (::java::lang::Thread::interrupted())
{
InterruptedIOException *iioe
= new InterruptedIOException (JvNewStringLatin1 (strerror (errno)));
iioe->bytesTransferred = r == -1 ? 0 : r;
throw iioe;
}
if (errno != EINTR)
throw new IOException (JvNewStringLatin1 (strerror (errno)));
}
}
while (r != 1);
pos++;
return b & 0xFF;
}
jint
FileChannelImpl::read (jbyteArray buffer, jint offset, jint count)
{
if (! buffer)
throw new ::java::lang::NullPointerException;
jsize bsize = JvGetArrayLength (buffer);
if (offset < 0 || count < 0 || offset + count > bsize)
throw new ::java::lang::ArrayIndexOutOfBoundsException;
// Must return 0 if an attempt is made to read 0 bytes.
if (count == 0)
return 0;
jbyte *bytes = elements (buffer) + offset;
int r;
do
{
r = ::read (fd, bytes, count);
if (r == 0)
return -1;
if (r == -1)
{
if (::java::lang::Thread::interrupted())
{
InterruptedIOException *iioe
= new InterruptedIOException (JvNewStringLatin1 (strerror (errno)));
iioe->bytesTransferred = r == -1 ? 0 : r;
throw iioe;
}
if (errno != EINTR)
throw new IOException (JvNewStringLatin1 (strerror (errno)));
}
}
while (r <= 0);
pos += r;
return r;
}
jint
FileChannelImpl::available (void)
{
#if defined (FIONREAD) || defined (HAVE_SELECT) || defined (HAVE_FSTAT)
long num = 0;
int r = 0;
bool num_set = false;
#if defined (FIONREAD)
r = ::ioctl (fd, FIONREAD, &num);
if (r == -1 && errno == ENOTTY)
{
// If the ioctl doesn't work, we don't care.
r = 0;
num = 0;
}
else
num_set = true;
#elif defined (HAVE_SELECT)
if (fd < 0)
{
errno = EBADF;
r = -1;
}
#endif
if (r == -1)
{
posix_error:
throw new IOException (JvNewStringLatin1 (strerror (errno)));
}
// If we didn't get anything, and we have fstat, then see if see if
// we're reading a regular file. On many systems, FIONREAD does not
// work on regular files; select() likewise returns a useless
// result. This is run incorrectly when FIONREAD does work on
// regular files and we are at the end of the file. However, this
// case probably isn't very important.
#if defined (HAVE_FSTAT)
if (! num_set)
{
struct stat sb;
off_t where = 0;
if (fstat (fd, &sb) != -1
&& S_ISREG (sb.st_mode)
&& (where = lseek (fd, 0, SEEK_CUR)) != (off_t) -1)
{
num = (long) (sb.st_size - where);
num_set = true;
}
}
#endif /* HAVE_FSTAT */
#if defined (HAVE_SELECT)
if (! num_set)
{
fd_set rd;
FD_ZERO (&rd);
FD_SET (fd, &rd);
struct timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 0;
r = _Jv_select (fd + 1, &rd, NULL, NULL, &tv);
if (r == -1)
goto posix_error;
num = r == 0 ? 0 : 1;
}
#endif /* HAVE_SELECT */
return (jint) num;
#else
return 0;
#endif
}
jboolean
FileChannelImpl::lock
(jlong pos, jlong len, jboolean shared, jboolean wait)
{
struct flock lockdata;
lockdata.l_type = shared ? F_WRLCK : F_RDLCK;
lockdata.l_whence = SEEK_SET;
lockdata.l_start = pos;
lockdata.l_len = len;
if (::fcntl (fd, wait ? F_SETLKW : F_SETLK, &lockdata) == -1)
{
if (! wait && (errno == EACCES || errno == EAGAIN))
return false;
throw new IOException (JvNewStringLatin1 (strerror (errno)));
}
return true;
}
void
FileChannelImpl::unlock (jlong pos, jlong len)
{
struct flock lockdata;
lockdata.l_type = F_UNLCK;
lockdata.l_whence = SEEK_SET;
lockdata.l_start = pos;
lockdata.l_len = len;
if (::fcntl (fd, F_SETLK, &lockdata) == -1)
throw new IOException (JvNewStringLatin1 (strerror (errno)));
}
java::nio::MappedByteBuffer *
FileChannelImpl::mapImpl (jchar mmode, jlong position, jint size)
{
#if defined(HAVE_MMAP)
int prot, flags;
if (mmode == 'r')
{
prot = PROT_READ;
flags = MAP_PRIVATE;
}
else
{
prot = PROT_READ|PROT_WRITE;
flags = mmode == '+' ? MAP_SHARED : MAP_PRIVATE;
}
jint page_size = ::getpagesize();
jint offset = position & ~(page_size-1);
jint align = position - offset;
void* ptr = ::mmap(NULL, size + align, prot, flags, fd, offset);
MappedByteBufferImpl *buf
= new MappedByteBufferImpl ((RawData *) ((char *) ptr + align),
size, mmode == 'r');
if (ptr == MAP_FAILED)
throw new IOException (JvNewStringLatin1 (strerror (errno)));
buf->implPtr = reinterpret_cast<RawData*> (ptr);
buf->implLen = size+align;
return buf;
#else
throw new IOException (JvNewStringUTF ("mmap not implemented"));
#endif
}
void
MappedByteBufferImpl::unmapImpl ()
{
#if defined(HAVE_MMAP)
munmap((void*) implPtr, implLen);
#endif
}
void
MappedByteBufferImpl::loadImpl ()
{
}
jboolean
MappedByteBufferImpl::isLoadedImpl ()
{
return true;
}
void
MappedByteBufferImpl::forceImpl ()
{
#if defined(HAVE_MMAP)
::msync((void*) implPtr, implLen, MS_SYNC);
#endif
}

432
libjava/gnu/java/nio/channels/natFileChannelWin32.cc Normal file
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@ -0,0 +1,432 @@
// natFileChannelImplWin32.cc - Native part of FileChannelImpl class.
/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
Foundation, Inc.
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. */
// FIXME: In order to support interrupting of IO operations, we
// need to change to use the windows asynchronous IO functions
#include <config.h>
#include <platform.h>
#include <gcj/cni.h>
#include <gcj/javaprims.h>
#include <jvm.h>
#include <stdio.h>
#include <gnu/gcj/RawData.h>
#include <gnu/java/nio/FileLockImpl.h>
#include <gnu/java/nio/channels/FileChannelImpl.h>
#include <java/io/FileNotFoundException.h>
#include <java/io/IOException.h>
#include <java/io/SyncFailedException.h>
#include <java/io/InterruptedIOException.h>
#include <java/io/EOFException.h>
#include <java/lang/ArrayIndexOutOfBoundsException.h>
#include <java/lang/NullPointerException.h>
#include <java/lang/System.h>
#include <java/lang/String.h>
#include <java/lang/Thread.h>
#include <java/nio/ByteBuffer.h>
#include <java/nio/MappedByteBufferImpl.h>
#include <java/nio/channels/FileChannel.h>
#include <java/nio/channels/FileLock.h>
#include <gnu/java/nio/channels/FileChannelImpl.h>
using gnu::gcj::RawData;
using java::io::IOException;
using java::nio::MappedByteBufferImpl;
using java::io::InterruptedIOException;
using java::io::FileNotFoundException;
using java::lang::ArrayIndexOutOfBoundsException;
using gnu::java::nio::channels::FileChannelImpl;
#undef STRICT
static bool testCanUseGetHandleInfo()
{
/* Test to see whether GetHandleInformation can be used
for console input or screen buffers. This is better
a kludgy OS version check. */
DWORD dwFlags;
return GetHandleInformation (GetStdHandle (STD_INPUT_HANDLE),
&dwFlags) != 0;
}
// FIXME: casting a FILE (pointer) to a jint will not work on Win64 --
// we should be using gnu.gcj.RawData's.
void
FileChannelImpl::init(void)
{
in = new FileChannelImpl((jint)(GetStdHandle (STD_INPUT_HANDLE)),
FileChannelImpl::READ);
out = new FileChannelImpl((jint)(GetStdHandle (STD_OUTPUT_HANDLE)),
FileChannelImpl::WRITE);
err = new FileChannelImpl((jint)(GetStdHandle (STD_ERROR_HANDLE)),
FileChannelImpl::WRITE);
}
#if 0
FileChannelImpl::sync (void) {
if (! FlushFileBuffers ((HANDLE)fd))
{
DWORD dwErrorCode = GetLastError ();
throw new SyncFailedException (_Jv_WinStrError (dwErrorCode));
}
}
#endif
jint
FileChannelImpl::open (jstring path, jint jflags) {
HANDLE handle = NULL;
DWORD access = 0;
DWORD create = OPEN_EXISTING;
JV_TEMP_STRING_WIN32(cpath, path)
JvAssert((jflags & READ) || (jflags & WRITE));
if ((jflags & READ) && (jflags & WRITE))
{
access = GENERIC_READ | GENERIC_WRITE;
if (jflags & EXCL)
create = CREATE_NEW; // this will raise error if file exists.
else
create = OPEN_ALWAYS; // equivalent to O_CREAT
}
else if (jflags & READ)
{
access = GENERIC_READ;
create = OPEN_EXISTING; // ignore EXCL
}
else
{
access = GENERIC_WRITE;
if (jflags & EXCL)
create = CREATE_NEW;
else if (jflags & APPEND)
create = OPEN_ALWAYS;
else
create = CREATE_ALWAYS;
}
handle = CreateFile(cpath, access, FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, create, 0, NULL);
if (handle == INVALID_HANDLE_VALUE)
{
DWORD dwErrorCode = GetLastError ();
throw new FileNotFoundException (_Jv_WinStrError (cpath, dwErrorCode));
}
// For APPEND mode, move the file pointer to the end of the file.
if (jflags & APPEND)
{
DWORD low = SetFilePointer (handle, 0, NULL, FILE_END);
if ((low == (DWORD) 0xffffffff) && (GetLastError () != NO_ERROR))
{
DWORD dwErrorCode = GetLastError ();
throw new FileNotFoundException (_Jv_WinStrError (cpath, dwErrorCode));
}
}
// Make this handle non-inheritable so that child
// processes don't inadvertently prevent us from
// closing this file.
_Jv_platform_close_on_exec (handle);
return (jint) handle;
}
void
FileChannelImpl::write (jint b)
{
DWORD bytesWritten;
jbyte buf = (jbyte)b;
if (WriteFile ((HANDLE)fd, &buf, 1, &bytesWritten, NULL))
{
if (::java::lang::Thread::interrupted())
{
InterruptedIOException *iioe = new InterruptedIOException (JvNewStringLatin1 ("write interrupted"));
iioe->bytesTransferred = bytesWritten;
throw iioe;
}
if (bytesWritten != 1)
_Jv_ThrowIOException ();
}
else
_Jv_ThrowIOException ();
// FIXME: loop until bytesWritten == 1
}
void
FileChannelImpl::write(jbyteArray b, jint offset, jint len)
{
if (! b)
throw new ::java::lang::NullPointerException;
if(offset < 0 || len < 0 || offset + len > JvGetArrayLength (b))
throw new ArrayIndexOutOfBoundsException;
jbyte *buf = elements (b) + offset;
DWORD bytesWritten;
if (WriteFile ((HANDLE)fd, buf, len, &bytesWritten, NULL))
{
if (::java::lang::Thread::interrupted())
{
InterruptedIOException *iioe = new InterruptedIOException (JvNewStringLatin1 ("write interrupted"));
iioe->bytesTransferred = bytesWritten;
throw iioe;
}
}
else
_Jv_ThrowIOException ();
// FIXME: loop until bytesWritten == len
}
void
FileChannelImpl::implCloseChannel (void)
{
HANDLE save = (HANDLE)fd;
fd = (jint)INVALID_HANDLE_VALUE;
if (! CloseHandle (save))
_Jv_ThrowIOException ();
}
void
FileChannelImpl::implTruncate (jlong size)
{
LONG liOrigFilePointer;
LONG liNewFilePointer;
LONG liEndFilePointer;
// Get the original file pointer.
if (SetFilePointer((HANDLE) fd, (LONG) 0, &liOrigFilePointer,
FILE_CURRENT) != (BOOL) 0
&& (GetLastError() != NO_ERROR))
_Jv_ThrowIOException ();
// Get the length of the file.
if (SetFilePointer((HANDLE) fd, (LONG) 0, &liEndFilePointer,
FILE_END) != (BOOL) 0
&& (GetLastError() != NO_ERROR))
_Jv_ThrowIOException ();
if ((jlong)liEndFilePointer == size)
{
// Restore the file pointer.
if (liOrigFilePointer != liEndFilePointer)
{
if (SetFilePointer((HANDLE) fd, liOrigFilePointer, &liNewFilePointer,
FILE_BEGIN) != (BOOL) 0
&& (GetLastError() != NO_ERROR))
_Jv_ThrowIOException ();
}
return;
}
// Seek to the new end of file.
if (SetFilePointer((HANDLE) fd, (LONG) size, &liNewFilePointer,
FILE_BEGIN) != (BOOL) 0
&& (GetLastError() != NO_ERROR))
_Jv_ThrowIOException ();
// Truncate the file at this point.
if (SetEndOfFile((HANDLE) fd) != (BOOL) 0 && (GetLastError() != NO_ERROR))
_Jv_ThrowIOException ();
if (liOrigFilePointer < liNewFilePointer)
{
// Restore the file pointer.
if (SetFilePointer((HANDLE) fd, liOrigFilePointer, &liNewFilePointer,
FILE_BEGIN) != (BOOL) 0
&& (GetLastError() != NO_ERROR))
_Jv_ThrowIOException ();
}
}
void
FileChannelImpl::seek (jlong newPos)
{
LONG high = pos >> 32;
DWORD low = SetFilePointer ((HANDLE)fd, (DWORD)(0xffffffff & newPos), &high, FILE_BEGIN);
if ((low == 0xffffffff) && (GetLastError () != NO_ERROR))
_Jv_ThrowIOException ();
}
jlong
FileChannelImpl::implPosition (void)
{
LONG high = 0;
DWORD low = SetFilePointer ((HANDLE)fd, 0, &high, FILE_CURRENT);
if ((low == 0xffffffff) && (GetLastError() != NO_ERROR))
_Jv_ThrowIOException ();
return (((jlong)high) << 32L) | (jlong)low;
}
jlong
FileChannelImpl::size (void)
{
DWORD high;
DWORD low;
low = GetFileSize ((HANDLE)fd, &high);
// FIXME: Error checking
return (((jlong)high) << 32L) | (jlong)low;
}
jint
FileChannelImpl::read (void)
{
CHAR buf;
DWORD read;
if (! ReadFile ((HANDLE)fd, &buf, 1, &read, NULL))
{
if (GetLastError () == ERROR_BROKEN_PIPE)
return -1;
else
_Jv_ThrowIOException ();
}
if (! read)
return -1;
else
return (jint)(buf & 0xff);
}
jint
FileChannelImpl::read (jbyteArray buffer, jint offset, jint count)
{
if (! buffer)
throw new ::java::lang::NullPointerException;
jsize bsize = JvGetArrayLength (buffer);
if (offset < 0 || count < 0 || offset + count > bsize)
throw new ArrayIndexOutOfBoundsException;
// Must return 0 if an attempt is made to read 0 bytes.
if (count == 0)
return 0;
jbyte *bytes = elements (buffer) + offset;
DWORD read;
if (! ReadFile((HANDLE)fd, bytes, count, &read, NULL))
{
if (GetLastError () == ERROR_BROKEN_PIPE)
return -1;
else
_Jv_ThrowIOException ();
}
if (read == 0) return -1;
return (jint)read;
}
jint
FileChannelImpl::available (void)
{
// FIXME:
return size() - position();
}
jboolean
FileChannelImpl::lock
(jlong /*pos*/, jlong /*len*/, jboolean /*shared*/, jboolean /*wait*/)
{
throw new IOException (JvNewStringLatin1
("FileChannel.lock() not implemented"));
}
void
FileChannelImpl::unlock (jlong /*pos*/, jlong /*len*/)
{
throw new IOException (JvNewStringLatin1
("FileChannel.unlock() not implemented"));
}
java::nio::MappedByteBuffer *
FileChannelImpl::mapImpl (jchar mmode, jlong position, jint size)
{
SYSTEM_INFO siSysInfo;
GetSystemInfo(&siSysInfo);
DWORD page_size = siSysInfo.dwPageSize;
jlong offset = position & ~(page_size-1);
jint align = position - offset;
jlong high = position + size;
jlong max_size;
if (mmode == '+')
max_size = high - offset;
else
max_size = 0;
DWORD access, protect;
if (mmode == 'r')
{
access = FILE_MAP_READ;
protect = PAGE_READONLY;
}
else if (mmode == '+')
{
access = FILE_MAP_WRITE;
protect = PAGE_READWRITE;
}
else
{
access = FILE_MAP_COPY;
protect = PAGE_WRITECOPY;
}
HANDLE hFileMapping = CreateFileMapping((HANDLE) fd,
(LPSECURITY_ATTRIBUTES) NULL,
protect,
(DWORD) (max_size >> 32),
(DWORD) max_size,
(LPCTSTR) NULL);
if (hFileMapping == NULL)
throw new IOException();
void *ptr = MapViewOfFile(hFileMapping, access,
(DWORD) (offset >> 32), (DWORD) offset,
(SIZE_T) (high - offset));
if (ptr == NULL)
throw new IOException();
MappedByteBufferImpl *buf
= new MappedByteBufferImpl((RawData *) ((char *) ptr + align),
size, mode == 'r');
buf->implPtr = reinterpret_cast<RawData*> (ptr);
buf->implLen = (jlong) (size_t) hFileMapping;
return buf;
}
void
MappedByteBufferImpl::unmapImpl ()
{
UnmapViewOfFile((void*)implPtr);
CloseHandle((HANDLE) (size_t) implLen);
}
void
MappedByteBufferImpl::loadImpl ()
{
}
jboolean
MappedByteBufferImpl::isLoadedImpl ()
{
return true;
}
void
MappedByteBufferImpl::forceImpl ()
{
}