ceph/src/boost/boost/asio/detail/global.hpp

   1 //
   2 // detail/global.hpp
   3 // ~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2017 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_GLOBAL_HPP
  12 #define BOOST_ASIO_DETAIL_GLOBAL_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 # include <boost/asio/detail/null_global.hpp>
  22 #elif defined(BOOST_ASIO_WINDOWS)
  23 # include <boost/asio/detail/win_global.hpp>
  24 #elif defined(BOOST_ASIO_HAS_PTHREADS)
  25 # include <boost/asio/detail/posix_global.hpp>
  26 #elif defined(BOOST_ASIO_HAS_STD_CALL_ONCE)
  27 # include <boost/asio/detail/std_global.hpp>
  28 #else
  29 # error Only Windows, POSIX and std::call_once are supported!
  30 #endif
  31
  32 namespace boost {
  33 namespace asio {
  34 namespace detail {
  35
  36 template <typename T>
  37 inline T& global()
  38 {
  39 #if !defined(BOOST_ASIO_HAS_THREADS)
  40   return null_global<T>();
  41 #elif defined(BOOST_ASIO_WINDOWS)
  42   return win_global<T>();
  43 #elif defined(BOOST_ASIO_HAS_PTHREADS)
  44   return posix_global<T>();
  45 #elif defined(BOOST_ASIO_HAS_STD_CALL_ONCE)
  46   return std_global<T>();
  47 #endif
  48 }
  49
  50 } // namespace detail
  51 } // namespace asio
  52 } // namespace boost
  53
  54 #endif // BOOST_ASIO_DETAIL_GLOBAL_HPP