[Boost-commit] svn:boost r39777 - trunk/boost/thread/win32

From: anthony_at_[hidden]
Date: 2007-10-08 03:18:28

Author: anthonyw
Date: 2007-10-08 03:18:27 EDT (Mon, 08 Oct 2007)
New Revision: 39777
URL: http://svn.boost.org/trac/boost/changeset/39777

Log:
Use InterlockedCompareExchange when _ReadWriteBarrier not available
Text files modified: 
   trunk/boost/thread/win32/interlocked_read.hpp |    24 +++++++++++++++++++++++-                
   1 files changed, 23 insertions(+), 1 deletions(-)

Modified: trunk/boost/thread/win32/interlocked_read.hpp
==============================================================================
--- trunk/boost/thread/win32/interlocked_read.hpp	(original)
+++ trunk/boost/thread/win32/interlocked_read.hpp	2007-10-08 03:18:27 EDT (Mon, 08 Oct 2007)
@@ -9,7 +9,7 @@
 //  accompanying file LICENSE_1_0.txt or copy at
 //  http://www.boost.org/LICENSE_1_0.txt)
 
-#include <boost/detail/interlocked.hpp>
+#ifdef BOOST_MSVC
 
 extern "C" void _ReadWriteBarrier(void);
 #pragma intrinsic(_ReadWriteBarrier)
@@ -33,4 +33,26 @@
     }
 }
 
+#else
+
+#include <boost/detail/interlocked.hpp>
+
+namespace boost
+{
+    namespace detail
+    {
+        inline long interlocked_read_acquire(long volatile* x)
+        {
+            return BOOST_INTERLOCKED_COMPARE_EXCHANGE(x,0,0);
+        }
+        inline void* interlocked_read_acquire(void* volatile* x)
+        {
+            return BOOST_INTERLOCKED_COMPARE_EXCHANGE_POINTER(x,0,0);
+        }
+    }
+}
+
+#endif
+
+
 #endif