#ifndef BOOST_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED

 #define BOOST_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED

 // MS compatible compilers support #pragma once

 #if defined(_MSC_VER) && (_MSC_VER >= 1020)

 # pragma once

 #endif

 //

 //  boost/detail/atomic_count_win32.hpp

 //

 //  Copyright (c) 2001-2005 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/detail/interlocked.hpp>

 namespace boost

 {

 namespace detail

 {

 class atomic_count

 {

 public:

     explicit atomic_count( long v ): value_( v )

     {

     }

     long operator++()

     {

         return BOOST_INTERLOCKED_INCREMENT( &value_ );

     }

     long operator--()

     {

         return BOOST_INTERLOCKED_DECREMENT( &value_ );

     }

     operator long() const

     {

         return static_cast<long const volatile &>( value_ );

     }

 private:

     atomic_count( atomic_count const & );

     atomic_count & operator=( atomic_count const & );

     long value_;

 };

 } // namespace detail

 } // namespace boost

 #endif // #ifndef BOOST_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED