--- a/rep/channel/ChannelSimulator.java	Sat Oct 04 22:12:34 2008 +0900
+++ b/rep/channel/ChannelSimulator.java	Sat Oct 04 22:22:07 2008 +0900
@@ -39,14 +39,14 @@
 			} catch (InterruptedException e) {
 			}
 		}
-		// for write wait
-		otherEnd.wakeup(); selector.wakeup();
+		// for write wait (we don't need this)
+		//otherEnd.wakeup(); selector.wakeup();
 		return tmp;
 	}
 	
-	private synchronized void wakeup() {
-		notify();
-	}
+	//private synchronized void wakeup() {
+	//	notify();
+	//}
 
 	/** write packet to other end.  */
 	public boolean write(P p){
@@ -61,7 +61,8 @@
 				notify(); // other end my wait()
 				selector.wakeup(); // selector may wait
 				break;
-			} else {
+			} else { // this can't happen
+				assert(false);
 				try {
 					wait(); // queue is full, we have to wait here
 				} catch (InterruptedException e) {
@@ -92,14 +93,14 @@
 	public boolean isAcceptable() {
 		return false;
 	}
-	public boolean isReadable() {
-		synchronized (selector){ 
-			return !readQ.isEmpty();
-		}
+	public synchronized boolean isReadable() {
+		return !readQ.isEmpty();
 	}
+	
 	public boolean isWritable() {
 		return true;
 	}
+	
 	@Override
 	public SelectableChannel configureBlocking(boolean block) throws IOException {
 		isBlocking = block;