-#ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_SYNC_HPP_INCLUDED\r
-#define BOOST_SMART_PTR_DETAIL_SPINLOCK_SYNC_HPP_INCLUDED\r
-\r
-// MS compatible compilers support #pragma once\r
-\r
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)\r
-# pragma once\r
-#endif\r
-\r
-//\r
-// Copyright (c) 2008 Peter Dimov\r
-//\r
-// Distributed under the Boost Software License, Version 1.0.\r
-// See accompanying file LICENSE_1_0.txt or copy at\r
-// http://www.boost.org/LICENSE_1_0.txt)\r
-//\r
-\r
-#include <boost/smart_ptr/detail/yield_k.hpp>\r
-\r
-#if defined( __ia64__ ) && defined( __INTEL_COMPILER )\r
-# include <ia64intrin.h>\r
-#endif\r
-\r
-namespace boost\r
-{\r
-\r
-namespace detail\r
-{\r
-\r
-class spinlock\r
-{\r
-public:\r
-\r
- int v_;\r
-\r
-public:\r
-\r
- bool try_lock()\r
- {\r
- int r = __sync_lock_test_and_set( &v_, 1 );\r
- return r == 0;\r
- }\r
-\r
- void lock()\r
- {\r
- for( unsigned k = 0; !try_lock(); ++k )\r
- {\r
- boost::detail::yield( k );\r
- }\r
- }\r
-\r
- void unlock()\r
- {\r
- __sync_lock_release( &v_ );\r
- }\r
-\r
-public:\r
-\r
- class scoped_lock\r
- {\r
- private:\r
-\r
- spinlock & sp_;\r
-\r
- scoped_lock( scoped_lock const & );\r
- scoped_lock & operator=( scoped_lock const & );\r
-\r
- public:\r
-\r
- explicit scoped_lock( spinlock & sp ): sp_( sp )\r
- {\r
- sp.lock();\r
- }\r
-\r
- ~scoped_lock()\r
- {\r
- sp_.unlock();\r
- }\r
- };\r
-};\r
-\r
-} // namespace detail\r
-} // namespace boost\r
-\r
-#define BOOST_DETAIL_SPINLOCK_INIT {0}\r
-\r
-#endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_SYNC_HPP_INCLUDED\r
+#ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_SYNC_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SPINLOCK_SYNC_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+// Copyright (c) 2008 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/smart_ptr/detail/yield_k.hpp>
+
+#if defined( __ia64__ ) && defined( __INTEL_COMPILER )
+# include <ia64intrin.h>
+#endif
+
+namespace boost
+{
+
+namespace detail
+{
+
+class spinlock
+{
+public:
+
+ int v_;
+
+public:
+
+ bool try_lock()
+ {
+ int r = __sync_lock_test_and_set( &v_, 1 );
+ return r == 0;
+ }
+
+ void lock()
+ {
+ for( unsigned k = 0; !try_lock(); ++k )
+ {
+ boost::detail::yield( k );
+ }
+ }
+
+ void unlock()
+ {
+ __sync_lock_release( &v_ );
+ }
+
+public:
+
+ class scoped_lock
+ {
+ private:
+
+ spinlock & sp_;
+
+ scoped_lock( scoped_lock const & );
+ scoped_lock & operator=( scoped_lock const & );
+
+ public:
+
+ explicit scoped_lock( spinlock & sp ): sp_( sp )
+ {
+ sp.lock();
+ }
+
+ ~scoped_lock()
+ {
+ sp_.unlock();
+ }
+ };
+};
+
+} // namespace detail
+} // namespace boost
+
+#define BOOST_DETAIL_SPINLOCK_INIT {0}
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_SYNC_HPP_INCLUDED