From 038ae17545335e5d1b33746b0193e85ee9f584fe Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Mon, 5 Jan 2015 23:05:29 +0000
Subject: Thought-necessary protection of TransferFunction::lut() for access
 from multiple threads.

---
 src/transfer_function.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src/transfer_function.h')

diff --git a/src/transfer_function.h b/src/transfer_function.h
index 16d00c1a..4105f3d4 100644
--- a/src/transfer_function.h
+++ b/src/transfer_function.h
@@ -22,6 +22,7 @@
 
 #include <boost/noncopyable.hpp>
 #include <boost/shared_ptr.hpp>
+#include <boost/thread/mutex.hpp>
 #include <map>
 
 namespace dcp {
@@ -43,8 +44,10 @@ protected:
 
 	bool _inverse;
 
-private:	
+private:
 	mutable std::map<int, double*> _luts;
+	/** mutex to protect _luts */
+	mutable boost::mutex _mutex;
 };
 
 }
-- 
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