From debf0df92ea63c514b007424ed462bd8cd0bee5e Mon Sep 17 00:00:00 2001
From: James Benton <james.benton2@gmail.com>
Date: Fri, 29 Sep 2017 11:46:54 +0100
Subject: [PATCH] common: Add FrameAllocator default constructor.

Also bool empty() and reset().
---
 src/common/frameallocator.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/src/common/frameallocator.h b/src/common/frameallocator.h
index 968b9b54..c2071ba1 100644
--- a/src/common/frameallocator.h
+++ b/src/common/frameallocator.h
@@ -6,6 +6,13 @@
 class FrameAllocator
 {
 public:
+   FrameAllocator() :
+      mBase(nullptr),
+      mSize(0),
+      mOffset(0)
+   {
+   }
+
    FrameAllocator(void *base, size_t size) :
       mBase(reinterpret_cast<uint8_t *>(base)),
       mSize(size),
@@ -13,6 +20,12 @@ public:
    {
    }
 
+   bool
+   empty() const
+   {
+      return mOffset == 0;
+   }
+
    uint8_t *
    top() const
    {
@@ -36,6 +49,12 @@ public:
       return result;
    }
 
+   void
+   reset()
+   {
+      mOffset = 0;
+   }
+
 protected:
    uint8_t *mBase;
    size_t mSize;