+++ /dev/null
-/* PipedOutputStream.java -- Write portion of piped streams.
- Copyright (C) 1998, 2000, 2001 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.io;
-
-// NOTE: This implementation is very similar to that of PipedWriter. If you
-// fix a bug in here, chances are you should make a similar change to the
-// PipedWriter code.
-
-/**
- * This class writes its bytes to a <code>PipedInputStream</code> to
- * which it is connected.
- * <p>
- * It is highly recommended that a <code>PipedOutputStream</code> and its
- * connected <code>PipedInputStream</code> be in different threads. If
- * they are in the same thread, read and write operations could deadlock
- * the thread.
- *
- * @author Aaron M. Renn (arenn@urbanophile.com)
- */
-public class PipedOutputStream extends OutputStream
-{
- /** Target PipedInputStream to which this is connected. Null only if this
- * OutputStream hasn't been connected yet. */
- PipedInputStream sink;
-
- /** Set to true if close() has been called on this OutputStream. */
- boolean closed;
-
- /**
- * Create an unconnected PipedOutputStream. It must be connected
- * to a <code>PipedInputStream</code> using the <code>connect</code>
- * method prior to writing any data or an exception will be thrown.
- */
- public PipedOutputStream()
- {
- }
-
- /**
- * Create a new <code>PipedOutputStream</code> instance
- * to write to the specified <code>PipedInputStream</code>. This stream
- * is then ready for writing.
- *
- * @param sink The <code>PipedInputStream</code> to connect this stream to.
- *
- * @exception IOException If <code>sink</code> has already been connected
- * to a different PipedOutputStream.
- */
- public PipedOutputStream(PipedInputStream sink) throws IOException
- {
- sink.connect(this);
- }
-
- /**
- * Connects this object to the specified <code>PipedInputStream</code>
- * object. This stream will then be ready for writing.
- *
- * @param sink The <code>PipedInputStream</code> to connect this stream to
- *
- * @exception IOException If the stream has not been connected or has
- * been closed.
- */
- public void connect(PipedInputStream sink) throws IOException
- {
- if (sink != null)
- throw new IOException ("Already connected");
- sink.connect(this);
- }
-
- /**
- * Write a single byte of date to the stream. Note that this method will
- * block if the <code>PipedInputStream</code> to which this object is
- * connected has a full buffer.
- *
- * @param b The byte of data to be written, passed as an <code>int</code>.
- *
- * @exception IOException If the stream has not been connected or has
- * been closed.
- */
- public void write(int b) throws IOException
- {
- if (sink == null)
- throw new IOException ("Not connected");
- if (closed)
- throw new IOException ("Pipe closed");
-
- sink.receive (b);
- }
-
- /**
- * This method writes <code>len</code> bytes of data from the byte array
- * <code>buf</code> starting at index <code>offset</code> in the array
- * to the stream. Note that this method will block if the
- * <code>PipedInputStream</code> to which this object is connected has
- * a buffer that cannot hold all of the bytes to be written.
- *
- * @param buf The array containing bytes to write to the stream.
- * @param offset The index into the array to start writing bytes from.
- * @param len The number of bytes to write.
- *
- * @exception IOException If the stream has not been connected or has
- * been closed.
- */
- public void write(byte[] b, int off, int len) throws IOException
- {
- if (sink == null)
- throw new IOException ("Not connected");
- if (closed)
- throw new IOException ("Pipe closed");
-
- sink.receive (b, off, len);
- }
-
- /**
- * This method does nothing.
- *
- * @exception IOException If the stream is closed.
- * @specnote You'd think that this method would block until the sink
- * had read all available data. Thats not the case - this method
- * appears to be a no-op?
- */
- public void flush()
- {
- }
-
- /**
- * This method closes this stream so that no more data can be written
- * to it. Any further attempts to write to this stream may throw an
- * exception
- *
- * @exception IOException If an error occurs
- */
- public void close()
- {
- // A close call on an unconnected PipedOutputStream has no effect.
- if (sink != null)
- {
- closed = true;
- // Notify any waiting readers that the stream is now closed.
- synchronized (sink)
- {
- sink.notifyAll();
- }
- }
- }
-}
projects / msp430-gcc.git / blobdiff