From c6bf857f8bee764d4381b9ff0ddae7b633d3a968 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@pdimov.com>
Date: Fri, 18 Mar 2005 21:27:22 +0000
Subject: [PATCH] Made the pthread mutex mutable

[SVN r27740]
---
 include/boost/detail/sp_counted_base_pt.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/detail/sp_counted_base_pt.hpp b/include/boost/detail/sp_counted_base_pt.hpp
index 5fb4716..191064f 100644
--- a/include/boost/detail/sp_counted_base_pt.hpp
+++ b/include/boost/detail/sp_counted_base_pt.hpp
@@ -37,7 +37,7 @@ private:
     long use_count_;        // #shared
     long weak_count_;       // #weak + (#shared != 0)
 
-    pthread_mutex_t m_;
+    mutable pthread_mutex_t m_;
 
 public: