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

   1 #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SPIN_HPP_INCLUDED
   2 #define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SPIN_HPP_INCLUDED
   3
   4 //
   5 //  boost/detail/atomic_count_spin.hpp
   6 //
   7 //  Copyright (c) 2013 Peter Dimov
   8 //
   9 //  Distributed under the Boost Software License, Version 1.0.
  10 //  See accompanying file LICENSE_1_0.txt or copy at
  11 //  http://www.boost.org/LICENSE_1_0.txt
  12 //
  13
  14 #include <boost/smart_ptr/detail/spinlock_pool.hpp>
  15
  16 namespace boost
  17 {
  18
  19 namespace detail
  20 {
  21
  22 class atomic_count
  23 {
  24 private:
  25
  26 public:
  27
  28     explicit atomic_count( long v ): value_( v )
  29     {
  30     }
  31
  32     long operator++()
  33     {
  34         spinlock_pool<0>::scoped_lock lock( &value_ );
  35         return ++value_;
  36     }
  37
  38     long operator--()
  39     {
  40         spinlock_pool<0>::scoped_lock lock( &value_ );
  41         return --value_;
  42     }
  43
  44     operator long() const
  45     {
  46         spinlock_pool<0>::scoped_lock lock( &value_ );
  47         return value_;
  48     }
  49
  50 private:
  51
  52     atomic_count(atomic_count const &);
  53     atomic_count & operator=(atomic_count const &);
  54
  55     long value_;
  56 };
  57
  58 } // namespace detail
  59
  60 } // namespace boost
  61
  62 #endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SPIN_HPP_INCLUDED