* gnu/java/nio/SelectorImpl.java

(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

libjava/java/nio/channels/spi/AbstractSelector.java

@@ -39,6 +39,7 @@ 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;
@@ -64,7 +65,7 @@ public abstract class AbstractSelector extends Selector
    * 
    * @exception IOException If an error occurs
    */
-  public final void close () throws IOException
+  public final synchronized void close () throws IOException
   {
     if (closed)
       return;
@@ -102,12 +103,18 @@ public abstract class AbstractSelector extends Selector
 
   protected final Set cancelledKeys()
   {
+    if (!isOpen())
+      throw new ClosedSelectorException();
+
     return cancelledKeys;
   }
 
   final void cancelKey (AbstractSelectionKey key)
   {
-    cancelledKeys.remove (key);
+    synchronized (cancelledKeys)
+      {
+        cancelledKeys.remove(key);
+      }
   }
 
   /**