text: //
  // detail/static_mutex.hpp
  // ~~~~~~~~~~~~~~~~~~~~~~~
  //
  // Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com)
  //
  // Distributed under the Boost Software License, Version 1.0. (See accompanying
  // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  //
  
  #ifndef BOOST_ASIO_DETAIL_STATIC_MUTEX_HPP
  #define BOOST_ASIO_DETAIL_STATIC_MUTEX_HPP
  
  #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  # pragma once
  #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  
  #include <boost/asio/detail/config.hpp>
  
  #if !defined(BOOST_ASIO_HAS_THREADS)
  # include <boost/asio/detail/null_static_mutex.hpp>
  #elif defined(BOOST_ASIO_WINDOWS)
  # include <boost/asio/detail/win_static_mutex.hpp>
  #elif defined(BOOST_ASIO_HAS_PTHREADS)
  # include <boost/asio/detail/posix_static_mutex.hpp>
  #elif defined(BOOST_ASIO_HAS_STD_MUTEX_AND_CONDVAR)
  # include <boost/asio/detail/std_static_mutex.hpp>
  #else
  # error Only Windows and POSIX are supported!
  #endif
  
  namespace boost {
  namespace asio {
  namespace detail {
  
  #if !defined(BOOST_ASIO_HAS_THREADS)
  typedef null_static_mutex static_mutex;
  # define BOOST_ASIO_STATIC_MUTEX_INIT BOOST_ASIO_NULL_STATIC_MUTEX_INIT
  #elif defined(BOOST_ASIO_WINDOWS)
  typedef win_static_mutex static_mutex;
  # define BOOST_ASIO_STATIC_MUTEX_INIT BOOST_ASIO_WIN_STATIC_MUTEX_INIT
  #elif defined(BOOST_ASIO_HAS_PTHREADS)
  typedef posix_static_mutex static_mutex;
  # define BOOST_ASIO_STATIC_MUTEX_INIT BOOST_ASIO_POSIX_STATIC_MUTEX_INIT
  #elif defined(BOOST_ASIO_HAS_STD_MUTEX_AND_CONDVAR)
  typedef std_static_mutex static_mutex;
  # define BOOST_ASIO_STATIC_MUTEX_INIT BOOST_ASIO_STD_STATIC_MUTEX_INIT
  #endif
  
  } // namespace detail
  } // namespace asio
  } // namespace boost
  
  #endif // BOOST_ASIO_DETAIL_STATIC_MUTEX_HPP
  