text: //
  // detail/impl/winsock_init.ipp
  // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  //
  // Copyright (c) 2003-2019 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 ASIO_DETAIL_IMPL_WINSOCK_INIT_IPP
  #define ASIO_DETAIL_IMPL_WINSOCK_INIT_IPP
  
  #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  # pragma once
  #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  
  #include "asio/detail/config.hpp"
  
  #if defined(ASIO_WINDOWS) || defined(__CYGWIN__)
  
  #include "asio/detail/socket_types.hpp"
  #include "asio/detail/winsock_init.hpp"
  #include "asio/detail/throw_error.hpp"
  #include "asio/error.hpp"
  
  #include "asio/detail/push_options.hpp"
  
  namespace asio {
  namespace detail {
  
  void winsock_init_base::startup(data& d,
      unsigned char major, unsigned char minor)
  {
    if (::InterlockedIncrement(&d.init_count_) == 1)
    {
      WSADATA wsa_data;
      long result = ::WSAStartup(MAKEWORD(major, minor), &wsa_data);
      ::InterlockedExchange(&d.result_, result);
    }
  }
  
  void winsock_init_base::manual_startup(data& d)
  {
    if (::InterlockedIncrement(&d.init_count_) == 1)
    {
      ::InterlockedExchange(&d.result_, 0);
    }
  }
  
  void winsock_init_base::cleanup(data& d)
  {
    if (::InterlockedDecrement(&d.init_count_) == 0)
    {
      ::WSACleanup();
    }
  }
  
  void winsock_init_base::manual_cleanup(data& d)
  {
    ::InterlockedDecrement(&d.init_count_);
  }
  
  void winsock_init_base::throw_on_error(data& d)
  {
    long result = ::InterlockedExchangeAdd(&d.result_, 0);
    if (result != 0)
    {
      asio::error_code ec(result,
          asio::error::get_system_category());
      asio::detail::throw_error(ec, "winsock");
    }
  }
  
  } // namespace detail
  } // namespace asio
  
  #include "asio/detail/pop_options.hpp"
  
  #endif // defined(ASIO_WINDOWS) || defined(__CYGWIN__)
  
  #endif // ASIO_DETAIL_IMPL_WINSOCK_INIT_IPP
  