ceph/src/boost/libs/asio/include/boost/asio/detail/atomic_count.hpp

   1 //
   2 // detail/atomic_count.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10
  11 #ifndef BOOST_ASIO_DETAIL_ATOMIC_COUNT_HPP
  12 #define BOOST_ASIO_DETAIL_ATOMIC_COUNT_HPP
  13
  14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  15 # pragma once
  16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  17
  18 #include <boost/asio/detail/config.hpp>
  19
  20 #if !defined(BOOST_ASIO_HAS_THREADS)
  21 // Nothing to include.
  22 #elif defined(BOOST_ASIO_HAS_STD_ATOMIC)
  23 # include <atomic>
  24 #else // defined(BOOST_ASIO_HAS_STD_ATOMIC)
  25 # include <boost/detail/atomic_count.hpp>
  26 #endif // defined(BOOST_ASIO_HAS_STD_ATOMIC)
  27
  28 namespace boost {
  29 namespace asio {
  30 namespace detail {
  31
  32 #if !defined(BOOST_ASIO_HAS_THREADS)
  33 typedef long atomic_count;
  34 inline void increment(atomic_count& a, long b) { a += b; }
  35 #elif defined(BOOST_ASIO_HAS_STD_ATOMIC)
  36 typedef std::atomic<long> atomic_count;
  37 inline void increment(atomic_count& a, long b) { a += b; }
  38 #else // defined(BOOST_ASIO_HAS_STD_ATOMIC)
  39 typedef boost::detail::atomic_count atomic_count;
  40 inline void increment(atomic_count& a, long b) { while (b > 0) ++a, --b; }
  41 #endif // defined(BOOST_ASIO_HAS_STD_ATOMIC)
  42
  43 } // namespace detail
  44 } // namespace asio
  45 } // namespace boost
  46
  47 #endif // BOOST_ASIO_DETAIL_ATOMIC_COUNT_HPP