From a21c1da1561e0f1dc1ce4b3719f925abc25a74de Mon Sep 17 00:00:00 2001
From: Andres Morales <anmorales@google.com>
Date: Wed, 9 Dec 2015 14:40:33 -0800
Subject: [PATCH] make RingBuffer const viable

- mark size() const
- expose const operator[]

Change-Id: Ie94ff798caed6b0d9a039e359610204e93c073ac
---
 libs/hwui/utils/RingBuffer.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libs/hwui/utils/RingBuffer.h b/libs/hwui/utils/RingBuffer.h
index 6895f07fd60aa..06bcdcd7d84b4 100644
--- a/libs/hwui/utils/RingBuffer.h
+++ b/libs/hwui/utils/RingBuffer.h
@@ -32,7 +32,7 @@ public:
     ~RingBuffer() {}
 
     constexpr size_t capacity() const { return SIZE; }
-    size_t size() { return mCount; }
+    size_t size() const { return mCount; }
 
     T& next() {
         mHead = (mHead + 1) % SIZE;
@@ -54,6 +54,10 @@ public:
         return mBuffer[(mHead + index + 1) % mCount];
     }
 
+    const T& operator[](size_t index) const {
+        return mBuffer[(mHead + index + 1) % mCount];
+    }
+
     void clear() {
         mCount = 0;
         mHead = -1;