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 #if defined(BOOST_SP_REPORT_IMPLEMENTATION)
  23
  24 #include <boost/config/pragma_message.hpp>
  25 BOOST_PRAGMA_MESSAGE("Using Win32 atomic_count")
  26
  27 #endif
  28
  29 namespace boost
  30 {
  31
  32 namespace detail
  33 {
  34
  35 class atomic_count
  36 {
  37 public:
  38
  39     explicit atomic_count( long v ): value_( v )
  40     {
  41     }
  42
  43     long operator++()
  44     {
  45         return BOOST_SP_INTERLOCKED_INCREMENT( &value_ );
  46     }
  47
  48     long operator--()
  49     {
  50         return BOOST_SP_INTERLOCKED_DECREMENT( &value_ );
  51     }
  52
  53     operator long() const
  54     {
  55         return static_cast<long const volatile &>( value_ );
  56     }
  57
  58 private:
  59
  60     atomic_count( atomic_count const & );
  61     atomic_count & operator=( atomic_count const & );
  62
  63     long value_;
  64 };
  65
  66 } // namespace detail
  67
  68 } // namespace boost
  69
  70 #endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED