From 4fadd968fa12130524c8380f33fcfe25d4de79e5 Mon Sep 17 00:00:00 2001
From: DongHun Kwak <dh0128.kwak@samsung.com>
Date: Wed, 13 Sep 2017 11:24:46 +0900
Subject: Imported Upstream version 1.65.0

Change-Id: Icf8400b375482cb11bcf77440a6934ba360d6ba4
Signed-off-by: DongHun Kwak <dh0128.kwak@samsung.com>
---
 boost/compute/iterator/buffer_iterator.hpp | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

(limited to 'boost/compute/iterator/buffer_iterator.hpp')

diff --git a/boost/compute/iterator/buffer_iterator.hpp b/boost/compute/iterator/buffer_iterator.hpp
index cd68058f64..de2395a552 100644
--- a/boost/compute/iterator/buffer_iterator.hpp
+++ b/boost/compute/iterator/buffer_iterator.hpp
@@ -58,13 +58,20 @@ struct buffer_iterator_index_expr
                                size_t index,
                                const memory_object::address_space address_space,
                                const IndexExpr &expr)
-        : m_buffer(buffer),
+        : m_buffer(buffer.get(), false),
           m_index(index),
           m_address_space(address_space),
           m_expr(expr)
     {
     }
 
+    ~buffer_iterator_index_expr()
+    {
+        // set buffer to null so that its reference count will
+        // not be decremented when its destructor is called
+        m_buffer.get() = 0;
+    }
+
     operator T() const
     {
         BOOST_STATIC_ASSERT_MSG(boost::is_integral<IndexExpr>::value,
@@ -73,10 +80,10 @@ struct buffer_iterator_index_expr
         return buffer_value<T>(m_buffer, size_t(m_expr) * sizeof(T));
     }
 
-    const buffer &m_buffer;
-    size_t m_index;
-    memory_object::address_space m_address_space;
-    IndexExpr m_expr;
+    const buffer m_buffer;
+    const size_t m_index;
+    const memory_object::address_space m_address_space;
+    const IndexExpr m_expr;
 };
 
 template<class T, class IndexExpr>
-- 
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