[Boost-commit] svn:boost r79647 - trunk/boost/asio/detail

Subject: [Boost-commit] svn:boost r79647 - trunk/boost/asio/detail
From: chris_at_[hidden]
Date: 2012-07-22 02:04:24

Author: chris_kohlhoff
Date: 2012-07-22 02:04:23 EDT (Sun, 22 Jul 2012)
New Revision: 79647
URL: http://svn.boost.org/trac/boost/changeset/79647

Log:
Use gcc's atomic builtins on arm, when available.
Text files modified: 
   trunk/boost/asio/detail/fenced_block.hpp |     6 ++++--                                  
   1 files changed, 4 insertions(+), 2 deletions(-)

Modified: trunk/boost/asio/detail/fenced_block.hpp
==============================================================================
--- trunk/boost/asio/detail/fenced_block.hpp	(original)
+++ trunk/boost/asio/detail/fenced_block.hpp	2012-07-22 02:04:23 EDT (Sun, 22 Jul 2012)
@@ -25,7 +25,8 @@
 # include <boost/asio/detail/macos_fenced_block.hpp>
 #elif defined(__sun)
 # include <boost/asio/detail/solaris_fenced_block.hpp>
-#elif defined(__GNUC__) && defined(__arm__)
+#elif defined(__GNUC__) && defined(__arm__) \
+  && !defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)
 # include <boost/asio/detail/gcc_arm_fenced_block.hpp>
 #elif defined(__GNUC__) && (defined(__hppa) || defined(__hppa__))
 # include <boost/asio/detail/gcc_hppa_fenced_block.hpp>
@@ -54,7 +55,8 @@
 typedef macos_fenced_block fenced_block;
 #elif defined(__sun)
 typedef solaris_fenced_block fenced_block;
-#elif defined(__GNUC__) && defined(__arm__)
+#elif defined(__GNUC__) && defined(__arm__) \
+  && !defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)
 typedef gcc_arm_fenced_block fenced_block;
 #elif defined(__GNUC__) && (defined(__hppa) || defined(__hppa__))
 typedef gcc_hppa_fenced_block fenced_block;