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Subject: [Boost-commit] svn:boost r75753 - in branches/release: . boost boost/smart_ptr/detail
From: pdimov_at_[hidden]
Date: 2011-11-30 12:49:44


Author: pdimov
Date: 2011-11-30 12:49:43 EST (Wed, 30 Nov 2011)
New Revision: 75753
URL: http://svn.boost.org/trac/boost/changeset/75753

Log:
Merge [75389] to release. Fixes #5372.
Properties modified:
   branches/release/ (props changed)
   branches/release/boost/ (props changed)
Text files modified:
   branches/release/boost/smart_ptr/detail/spinlock_gcc_arm.hpp | 23 ++++++++++++++++++++---
   1 files changed, 20 insertions(+), 3 deletions(-)

Modified: branches/release/boost/smart_ptr/detail/spinlock_gcc_arm.hpp
==============================================================================
--- branches/release/boost/smart_ptr/detail/spinlock_gcc_arm.hpp (original)
+++ branches/release/boost/smart_ptr/detail/spinlock_gcc_arm.hpp 2011-11-30 12:49:43 EST (Wed, 30 Nov 2011)
@@ -2,7 +2,7 @@
 #define BOOST_SMART_PTR_DETAIL_SPINLOCK_GCC_ARM_HPP_INCLUDED
 
 //
-// Copyright (c) 2008 Peter Dimov
+// Copyright (c) 2008, 2011 Peter Dimov
 //
 // Distributed under the Boost Software License, Version 1.0.
 // See accompanying file LICENSE_1_0.txt or copy at
@@ -11,6 +11,20 @@
 
 #include <boost/smart_ptr/detail/yield_k.hpp>
 
+#if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__)
+
+# define BOOST_SP_ARM_BARRIER "dmb"
+
+#elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__)
+
+# define BOOST_SP_ARM_BARRIER "mcr p15, 0, r0, c7, c10, 5"
+
+#else
+
+# define BOOST_SP_ARM_BARRIER ""
+
+#endif
+
 namespace boost
 {
 
@@ -30,7 +44,8 @@
         int r;
 
         __asm__ __volatile__(
- "swp %0, %1, [%2]":
+ "swp %0, %1, [%2]\n\t"
+ BOOST_SP_ARM_BARRIER :
             "=&r"( r ): // outputs
             "r"( 1 ), "r"( &v_ ): // inputs
             "memory", "cc" );
@@ -48,7 +63,7 @@
 
     void unlock()
     {
- __asm__ __volatile__( "" ::: "memory" );
+ __asm__ __volatile__( BOOST_SP_ARM_BARRIER ::: "memory" );
         *const_cast< int volatile* >( &v_ ) = 0;
     }
 
@@ -82,4 +97,6 @@
 
 #define BOOST_DETAIL_SPINLOCK_INIT {0}
 
+#undef BOOST_SP_ARM_BARRIER
+
 #endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_GCC_ARM_HPP_INCLUDED


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