3 files changed, 42 insertions, 47 deletions

diff --git a/core/java/android/os/Looper.java b/core/java/android/os/Looper.java
index 8b99196..7384dd2 100644
--- a/core/java/android/os/Looper.java
+++ b/core/java/android/os/Looper.java
@@ -243,48 +243,6 @@ public final class Looper {
     }
 
     /**
-     * Posts a synchronization barrier to the Looper's message queue.
-     *
-     * Message processing occurs as usual until the message queue encounters the
-     * synchronization barrier that has been posted.  When the barrier is encountered,
-     * later synchronous messages in the queue are stalled (prevented from being executed)
-     * until the barrier is released by calling {@link #removeSyncBarrier} and specifying
-     * the token that identifies the synchronization barrier.
-     *
-     * This method is used to immediately postpone execution of all subsequently posted
-     * synchronous messages until a condition is met that releases the barrier.
-     * Asynchronous messages (see {@link Message#isAsynchronous} are exempt from the barrier
-     * and continue to be processed as usual.
-     *
-     * This call must be always matched by a call to {@link #removeSyncBarrier} with
-     * the same token to ensure that the message queue resumes normal operation.
-     * Otherwise the application will probably hang!
-     *
-     * @return A token that uniquely identifies the barrier.  This token must be
-     * passed to {@link #removeSyncBarrier} to release the barrier.
-     *
-     * @hide
-     */
-    public int postSyncBarrier() {
-        return mQueue.enqueueSyncBarrier(SystemClock.uptimeMillis());
-    }
-
-
-    /**
-     * Removes a synchronization barrier.
-     *
-     * @param token The synchronization barrier token that was returned by
-     * {@link #postSyncBarrier}.
-     *
-     * @throws IllegalStateException if the barrier was not found.
-     *
-     * @hide
-     */
-    public void removeSyncBarrier(int token) {
-        mQueue.removeSyncBarrier(token);
-    }
-
-    /**
      * Return the Thread associated with this Looper.
      */
     public Thread getThread() {
diff --git a/core/java/android/os/MessageQueue.java b/core/java/android/os/MessageQueue.java
index f4d609c..d672f9b 100644
--- a/core/java/android/os/MessageQueue.java
+++ b/core/java/android/os/MessageQueue.java
@@ -275,7 +275,34 @@ public final class MessageQueue {
         }
     }
 
-    int enqueueSyncBarrier(long when) {
+    /**
+     * Posts a synchronization barrier to the Looper's message queue.
+     *
+     * Message processing occurs as usual until the message queue encounters the
+     * synchronization barrier that has been posted.  When the barrier is encountered,
+     * later synchronous messages in the queue are stalled (prevented from being executed)
+     * until the barrier is released by calling {@link #removeSyncBarrier} and specifying
+     * the token that identifies the synchronization barrier.
+     *
+     * This method is used to immediately postpone execution of all subsequently posted
+     * synchronous messages until a condition is met that releases the barrier.
+     * Asynchronous messages (see {@link Message#isAsynchronous} are exempt from the barrier
+     * and continue to be processed as usual.
+     *
+     * This call must be always matched by a call to {@link #removeSyncBarrier} with
+     * the same token to ensure that the message queue resumes normal operation.
+     * Otherwise the application will probably hang!
+     *
+     * @return A token that uniquely identifies the barrier.  This token must be
+     * passed to {@link #removeSyncBarrier} to release the barrier.
+     *
+     * @hide
+     */
+    public int postSyncBarrier() {
+        return postSyncBarrier(SystemClock.uptimeMillis());
+    }
+
+    private int postSyncBarrier(long when) {
         // Enqueue a new sync barrier token.
         // We don't need to wake the queue because the purpose of a barrier is to stall it.
         synchronized (this) {
@@ -304,7 +331,17 @@ public final class MessageQueue {
         }
     }
 
-    void removeSyncBarrier(int token) {
+    /**
+     * Removes a synchronization barrier.
+     *
+     * @param token The synchronization barrier token that was returned by
+     * {@link #postSyncBarrier}.
+     *
+     * @throws IllegalStateException if the barrier was not found.
+     *
+     * @hide
+     */
+    public void removeSyncBarrier(int token) {
         // Remove a sync barrier token from the queue.
         // If the queue is no longer stalled by a barrier then wake it.
         synchronized (this) {
diff --git a/core/java/android/view/ViewRootImpl.java b/core/java/android/view/ViewRootImpl.java
index 14b867e..7cd12d5 100644
--- a/core/java/android/view/ViewRootImpl.java
+++ b/core/java/android/view/ViewRootImpl.java
@@ -1049,7 +1049,7 @@ public final class ViewRootImpl implements ViewParent,
     void scheduleTraversals() {
         if (!mTraversalScheduled) {
             mTraversalScheduled = true;
-            mTraversalBarrier = mHandler.getLooper().postSyncBarrier();
+            mTraversalBarrier = mHandler.getLooper().getQueue().postSyncBarrier();
             mChoreographer.postCallback(
                     Choreographer.CALLBACK_TRAVERSAL, mTraversalRunnable, null);
             if (!mUnbufferedInputDispatch) {
@@ -1063,7 +1063,7 @@ public final class ViewRootImpl implements ViewParent,
     void unscheduleTraversals() {
         if (mTraversalScheduled) {
             mTraversalScheduled = false;
-            mHandler.getLooper().removeSyncBarrier(mTraversalBarrier);
+            mHandler.getLooper().getQueue().removeSyncBarrier(mTraversalBarrier);
             mChoreographer.removeCallbacks(
                     Choreographer.CALLBACK_TRAVERSAL, mTraversalRunnable, null);
         }
@@ -1072,7 +1072,7 @@ public final class ViewRootImpl implements ViewParent,
     void doTraversal() {
         if (mTraversalScheduled) {
             mTraversalScheduled = false;
-            mHandler.getLooper().removeSyncBarrier(mTraversalBarrier);
+            mHandler.getLooper().getQueue().removeSyncBarrier(mTraversalBarrier);
 
             if (mProfile) {
                 Debug.startMethodTracing("ViewAncestor");