ceph/src/boost/boost/smart_ptr/detail/atomic_count_win32.hpp

   1 #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED
   2 #define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED
   3
   4 // MS compatible compilers support #pragma once
   5
   6 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
   7 # pragma once
   8 #endif
   9
  10 //
  11 //  boost/detail/atomic_count_win32.hpp
  12 //
  13 //  Copyright (c) 2001-2005 Peter Dimov
  14 //
  15 // Distributed under the Boost Software License, Version 1.0. (See
  16 // accompanying file LICENSE_1_0.txt or copy at
  17 // http://www.boost.org/LICENSE_1_0.txt)
  18 //
  19
  20 #include <boost/smart_ptr/detail/sp_interlocked.hpp>
  21
  22 namespace boost
  23 {
  24
  25 namespace detail
  26 {
  27
  28 class atomic_count
  29 {
  30 public:
  31
  32     explicit atomic_count( long v ): value_( v )
  33     {
  34     }
  35
  36     long operator++()
  37     {
  38         return BOOST_SP_INTERLOCKED_INCREMENT( &value_ );
  39     }
  40
  41     long operator--()
  42     {
  43         return BOOST_SP_INTERLOCKED_DECREMENT( &value_ );
  44     }
  45
  46     operator long() const
  47     {
  48         return static_cast<long const volatile &>( value_ );
  49     }
  50
  51 private:
  52
  53     atomic_count( atomic_count const & );
  54     atomic_count & operator=( atomic_count const & );
  55
  56     long value_;
  57 };
  58
  59 } // namespace detail
  60
  61 } // namespace boost
  62
  63 #endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED