boost/smart_ptr/detail/atomic_count_win32.hpp

#ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED
#define BOOST_SMART_PTR_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/smart_ptr/detail/sp_interlocked.hpp>
namespace boost
{
namespace detail
{
class atomic_count
{
public:
    explicit atomic_count( long v ): value_( v )
    {
    }
    long operator++()
    {
        return BOOST_SP_INTERLOCKED_INCREMENT( &value_ );
    }
    long operator--()
    {
        return BOOST_SP_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_SMART_PTR_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED