From b25446271aa3da08cc965b0834ae89c4dd23ee0c Mon Sep 17 00:00:00 2001
From: Mike Hearn <hearn@google.com>
Date: Fri, 2 Mar 2012 15:08:36 +0100
Subject: [PATCH] Synchronize on event listeners in EventListenerInvoker.

---
 .../bitcoin/utils/EventListenerInvoker.java      | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/src/com/google/bitcoin/utils/EventListenerInvoker.java b/src/com/google/bitcoin/utils/EventListenerInvoker.java
index d0184f3e..2f4f1d09 100644
--- a/src/com/google/bitcoin/utils/EventListenerInvoker.java
+++ b/src/com/google/bitcoin/utils/EventListenerInvoker.java
@@ -39,13 +39,15 @@ public abstract class EventListenerInvoker<E> {
     
     public static <E> void invoke(List<E> listeners,
                                   EventListenerInvoker<E> invoker) {
-        for (int i = 0; i < listeners.size(); i++) {
-            E l = listeners.get(i);
-            synchronized (l) {
-                invoker.invoke(l);
-            }
-            if (listeners.get(i) != l) {
-                i--;  // Listener removed itself.
+        synchronized (listeners) {
+            for (int i = 0; i < listeners.size(); i++) {
+                E l = listeners.get(i);
+                synchronized (l) {
+                    invoker.invoke(l);
+                }
+                if (listeners.get(i) != l) {
+                    i--;  // Listener removed itself.
+                }
             }
         }
     }