From 8130925c60b786759e852a6088776c626d8ee0e2 Mon Sep 17 00:00:00 2001
From: Owen Lin <owenlin@google.com>
Date: Wed, 16 May 2012 10:54:14 -0700
Subject: Fix a dead lock while we freeze the screen.

bug: 6504696
Change-Id: If960967142bb0df773ce075bf76f5726c37e1d27
---
 src/com/android/gallery3d/app/PhotoPage.java |  1 -
 src/com/android/gallery3d/ui/GLRoot.java     |  1 +
 src/com/android/gallery3d/ui/GLRootView.java | 40 +++++++++++++++++++++++++++-
 3 files changed, 40 insertions(+), 2 deletions(-)

diff --git a/src/com/android/gallery3d/app/PhotoPage.java b/src/com/android/gallery3d/app/PhotoPage.java
index a46c777fa..2022a6e2d 100644
--- a/src/com/android/gallery3d/app/PhotoPage.java
+++ b/src/com/android/gallery3d/app/PhotoPage.java
@@ -56,7 +56,6 @@ import com.android.gallery3d.ui.GLView;
 import com.android.gallery3d.ui.ImportCompleteListener;
 import com.android.gallery3d.ui.MenuExecutor;
 import com.android.gallery3d.ui.PhotoView;
-import com.android.gallery3d.ui.ScreenNail;
 import com.android.gallery3d.ui.SelectionManager;
 import com.android.gallery3d.ui.SynchronizedHandler;
 import com.android.gallery3d.util.GalleryUtils;
diff --git a/src/com/android/gallery3d/ui/GLRoot.java b/src/com/android/gallery3d/ui/GLRoot.java
index 5ed323a88..f4b7572a7 100644
--- a/src/com/android/gallery3d/ui/GLRoot.java
+++ b/src/com/android/gallery3d/ui/GLRoot.java
@@ -17,6 +17,7 @@
 package com.android.gallery3d.ui;
 
 import android.graphics.Matrix;
+
 import com.android.gallery3d.anim.CanvasAnimation;
 
 public interface GLRoot {
diff --git a/src/com/android/gallery3d/ui/GLRootView.java b/src/com/android/gallery3d/ui/GLRootView.java
index 1f25b9085..73e982509 100644
--- a/src/com/android/gallery3d/ui/GLRootView.java
+++ b/src/com/android/gallery3d/ui/GLRootView.java
@@ -19,12 +19,12 @@ package com.android.gallery3d.ui;
 import android.content.Context;
 import android.graphics.Matrix;
 import android.graphics.PixelFormat;
-import android.graphics.Rect;
 import android.opengl.GLSurfaceView;
 import android.os.Process;
 import android.os.SystemClock;
 import android.util.AttributeSet;
 import android.view.MotionEvent;
+import android.view.SurfaceHolder;
 
 import com.android.gallery3d.anim.CanvasAnimation;
 import com.android.gallery3d.common.Utils;
@@ -467,6 +467,7 @@ public class GLRootView extends GLSurfaceView
 
     @Override
     public void onPause() {
+        unfreeze();
         super.onPause();
         if (DEBUG_PROFILE) {
             Log.d(TAG, "Stop profiling");
@@ -510,4 +511,41 @@ public class GLRootView extends GLSurfaceView
         mFreezeCondition.signalAll();
         mRenderLock.unlock();
     }
+
+    // We need to unfreeze in the following methods and in onPause().
+    // These methods will wait on GLThread. If we have freezed the GLRootView,
+    // the GLThread will wait on main thread to call unfreeze and cause dead
+    // lock.
+    @Override
+    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
+        unfreeze();
+        super.surfaceChanged(holder, format, w, h);
+    }
+
+    @Override
+    public void surfaceCreated(SurfaceHolder holder) {
+        unfreeze();
+        super.surfaceCreated(holder);
+    }
+
+    @Override
+    public void surfaceDestroyed(SurfaceHolder holder) {
+        unfreeze();
+        super.surfaceDestroyed(holder);
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        unfreeze();
+        super.onDetachedFromWindow();
+    }
+
+    @Override
+    protected void finalize() throws Throwable {
+        try {
+            unfreeze();
+        } finally {
+            super.finalize();
+        }
+    }
 }
-- 
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