From 75c5501f47f61a9c45796d0c45ade4ade88da1fb Mon Sep 17 00:00:00 2001
From: Jorim Jaggi <jjaggi@google.com>
Date: Wed, 17 Jan 2018 22:59:33 +0100
Subject: [PATCH] Add ability to post a message at the front of the queue

Used for remote animations to minimize latency.

Test: Boots
Bug: 64674361
Change-Id: Id07295a852edf4fbc308a4e4616077275f35f0f7
---
 .../systemui/shared/recents/utilities/Utilities.java   | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/packages/SystemUI/shared/src/com/android/systemui/shared/recents/utilities/Utilities.java b/packages/SystemUI/shared/src/com/android/systemui/shared/recents/utilities/Utilities.java
index 7cc1cd63c1d5d..13f30b2c27b9b 100644
--- a/packages/SystemUI/shared/src/com/android/systemui/shared/recents/utilities/Utilities.java
+++ b/packages/SystemUI/shared/src/com/android/systemui/shared/recents/utilities/Utilities.java
@@ -28,6 +28,8 @@ import android.graphics.Color;
 import android.graphics.Rect;
 import android.graphics.RectF;
 import android.graphics.drawable.Drawable;
+import android.os.Handler;
+import android.os.Message;
 import android.os.Trace;
 import android.util.ArraySet;
 import android.util.IntProperty;
@@ -314,4 +316,12 @@ public class Utilities {
         }
         return r.left + "," + r.top + "-" + r.right + "," + r.bottom;
     }
+
+    /**
+     * Posts a runnable on a handler at the front of the queue ignoring any sync barriers.
+     */
+    public static void postAtFrontOfQueueAsynchronously(Handler h, Runnable r) {
+        Message msg = h.obtainMessage().setCallback(r);
+        h.sendMessageAtFrontOfQueue(msg);
+    }
 }