From fb6a0f10c3cf96b701f0dff93171aac18733428f Mon Sep 17 00:00:00 2001
From: Vinnie Falco <vinnie.falco@gmail.com>
Date: Thu, 26 Sep 2013 14:44:42 -0700
Subject: [PATCH] Add LockFreeStack::empty

---
 src/beast/beast/intrusive/LockFreeStack.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/beast/beast/intrusive/LockFreeStack.h b/src/beast/beast/intrusive/LockFreeStack.h
index c68420480..a765bbf9e 100644
--- a/src/beast/beast/intrusive/LockFreeStack.h
+++ b/src/beast/beast/intrusive/LockFreeStack.h
@@ -182,6 +182,12 @@ public:
     {
     }
 
+    /** Returns true if the stack is empty. */
+    bool empty() const
+    {
+        return m_head.get() == &m_end;
+    }
+
     /** Return the number of elements in the stack.
         Thread safety:
             Safe to call from any thread.