677f99cce5
(selectThreadMutex): New field. (selectThread): New field. (unhandledWakeup): New field. (implCloseSelector): Added skeleton code which synchronizes as per Sun JRE JavaDoc. (keys): Throw ClosedSelectorException if selector is closed. (selectNow): Added comment that we're faking out an immediate select with a one-microsecond-timeout one. (select): Use 0 instead of -1 for infinite timeout. (implSelect): Changed comment in declaration. (select): Added synchronized to method declaration. Added synchronization and wakeup support as per Sun JRE JavaDoc. (selectedKeys): Throw ClosedSelectorException if selector is closed. (wakeup): Implemented. (deregisterCancelledKeys): Synchronize on cancelled key set before deregistering. (register): Synchronize on key set before registering. * java/nio/channels/spi/AbstractSelector.java Added import for java.nio.channels.ClosedSelectorException. (close): Added synchronized to method declaration. (cancelledKeys): Throw ClosedSelectorException if selector is closed. (cancelKey): Synchronize on cancelled key set before key. From-SVN: r74879
132 lines
3.5 KiB
Java
132 lines
3.5 KiB
Java
/* AbstractSelector.java --
|
|
Copyright (C) 2002, 2003 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.spi;
|
|
|
|
import java.io.IOException;
|
|
import java.nio.channels.ClosedSelectorException;
|
|
import java.nio.channels.SelectionKey;
|
|
import java.nio.channels.Selector;
|
|
import java.util.Set;
|
|
import java.util.HashSet;
|
|
|
|
public abstract class AbstractSelector extends Selector
|
|
{
|
|
private boolean closed = false;
|
|
private SelectorProvider provider;
|
|
private HashSet cancelledKeys;
|
|
|
|
/**
|
|
* Initializes the slector.
|
|
*/
|
|
protected AbstractSelector (SelectorProvider provider)
|
|
{
|
|
this.provider = provider;
|
|
this.cancelledKeys = new HashSet();
|
|
}
|
|
|
|
/**
|
|
* Closes the channel.
|
|
*
|
|
* @exception IOException If an error occurs
|
|
*/
|
|
public final synchronized void close () throws IOException
|
|
{
|
|
if (closed)
|
|
return;
|
|
|
|
implCloseSelector();
|
|
closed = true;
|
|
}
|
|
|
|
/**
|
|
* Tells whether this channel is open or not.
|
|
*/
|
|
public final boolean isOpen ()
|
|
{
|
|
return ! closed;
|
|
}
|
|
|
|
/**
|
|
* Marks the beginning of an I/O operation that might block indefinitely.
|
|
*/
|
|
protected final void begin()
|
|
{
|
|
}
|
|
|
|
/**
|
|
* Marks the end of an I/O operation that might block indefinitely.
|
|
*/
|
|
protected final void end()
|
|
{
|
|
}
|
|
|
|
public final SelectorProvider provider ()
|
|
{
|
|
return provider;
|
|
}
|
|
|
|
protected final Set cancelledKeys()
|
|
{
|
|
if (!isOpen())
|
|
throw new ClosedSelectorException();
|
|
|
|
return cancelledKeys;
|
|
}
|
|
|
|
final void cancelKey (AbstractSelectionKey key)
|
|
{
|
|
synchronized (cancelledKeys)
|
|
{
|
|
cancelledKeys.remove(key);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Closes the channel.
|
|
*/
|
|
protected abstract void implCloseSelector () throws IOException;
|
|
|
|
protected abstract SelectionKey register (AbstractSelectableChannel ch,
|
|
int ops, Object att);
|
|
|
|
protected final void deregister (AbstractSelectionKey key)
|
|
{
|
|
// FIXME
|
|
}
|
|
}
|