[Boost-commit] svn:boost r45179 - trunk/boost/asio/detail

From: chris_at_[hidden]
Date: 2008-05-06 18:09:47

Author: chris_kohlhoff
Date: 2008-05-06 18:09:47 EDT (Tue, 06 May 2008)
New Revision: 45179
URL: http://svn.boost.org/trac/boost/changeset/45179

Log:
Use an atomic counter for strand reference counting.

Text files modified: 
   trunk/boost/asio/detail/strand_service.hpp |    11 +++--------                             
   1 files changed, 3 insertions(+), 8 deletions(-)

Modified: trunk/boost/asio/detail/strand_service.hpp
==============================================================================
--- trunk/boost/asio/detail/strand_service.hpp	(original)
+++ trunk/boost/asio/detail/strand_service.hpp	2008-05-06 18:09:47 EDT (Tue, 06 May 2008)
@@ -20,6 +20,7 @@
 #include <boost/asio/detail/push_options.hpp>
 #include <boost/aligned_storage.hpp>
 #include <boost/assert.hpp>
+#include <boost/detail/atomic_count.hpp>
 #include <boost/intrusive_ptr.hpp>
 #include <boost/asio/detail/pop_options.hpp>
 
@@ -55,19 +56,13 @@
 #endif
     void add_ref()
     {
-      boost::asio::detail::mutex::scoped_lock lock(mutex_);
       ++ref_count_;
     }
 
     void release()
     {
-      boost::asio::detail::mutex::scoped_lock lock(mutex_);
-      --ref_count_;
-      if (ref_count_ == 0)
-      {
-        lock.unlock();
+      if (--ref_count_ == 0)
         delete this;
-      }
     }
 
   private:
@@ -148,7 +143,7 @@
     strand_impl* prev_;
 
     // The reference count on the strand implementation.
-    size_t ref_count_;
+    boost::detail::atomic_count ref_count_;
 
 #if !defined(__BORLANDC__)
     friend void intrusive_ptr_add_ref(strand_impl* p)